AM Transmitters
Welcome to FMUSER—your go-to source for innovative high power AM transmitter solutions tailored for radio stations, community broadcasters, and businesses. We aim to empower broadcasters with advanced technology that improves communication, boosts audience engagement, and ensures high-quality transmission.
Recommended High Power AM Transmitters
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| 1KW AM Transmitter | 3KW AM Transmitter | 5KW AM Transmitter | 10KW AM Transmitter |
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| 25KW AM Transmitter | 50KW AM Transmitter | 100KW AM Transmitter | 200KW AM Transmitter |
I. What is a High Power AM Transmitter and Why It is Needed
1. What is a High Power AM Transmitter and Why It is Needed
A High Power AM transmitter is a crucial piece of broadcasting equipment designed to transmit amplitude modulated (AM) radio signals at elevated power levels. These transmitters work by modulating an audio signal onto a carrier wave, which is then amplified to ensure that the signal can cover vast distances.
The transmitter converts the low-level audio input into a high-power radio wave, allowing it to be broadcast over large areas. High power AM transmitters operate using various technologies, including solid-state and tube-based designs.
They are essential for broadcasting radio programs over long distances, ensuring that signals reach listeners in both urban and rural settings.
2. The Growing Need for High Power AM Transmitters
In today's fast-paced and ever-evolving broadcasting landscape, the demand for High Power AM transmitters is more pronounced than ever. Several factors contribute to the urgency of reliable broadcasting options:
- Long-Distance Broadcasting Efficiency: When compared to FM transmitters, High Power AM transmitters excel in covering extensive areas, making them ideal for broadcasting across cities and even countries. While FM signals can be hindered by physical obstructions, AM signals can travel further, especially during nighttime when atmospheric conditions favor long-distance transmission.
- Diverse Audience Requirements: Users in traditional settings, such as radio stations in urban centers, often require robust broadcasting capabilities. Conversely, remote areas, where internet connectivity is often unreliable or non-existent, depend heavily on AM broadcasting for access to news, information, and emergency alerts.
- Sector-Specific Needs: Different sectors, such as government, emergency services, and community organizations, have varying broadcasting requirements. High Power AM transmitters can be customized to meet these specific needs, whether it's for routine broadcasts or critical communication during emergencies.
- Emergency Nhepfenyuro: In times of crisis, such as during wars or natural disasters when internet services might be compromised, High Power AM transmitters become a lifeline for disseminating vital information. Their ability to broadcast over long distances can ensure that communities remain informed and connected when other communication methods fail.
- Zvishandiso Zvekare: Many existing High Power AM transmitters are outdated, leading to low-performance broadcast quality. Organizations face increasing pressure to upgrade their equipment to maintain signal integrity and reliability.
Despite the critical need for High Power AM transmitters, the market is facing challenges. Only a handful of providers offer cost-effective, turnkey, and robust solutions, making it difficult for organizations to handle the purchasing, installation, and operation of these transmitters efficiently.
3. How FMUSER High Power AM Transmitter Addresses These Challenges
FMUSER stands out as a solution provider in the AM broadcasting landscape.
The following features highlight how FMUSER’s High Power AM transmitters effectively address the pressing needs of today's broadcasters:
- Highly Compatible Equipment: FMUSER offers a comprehensive range of compatible AM broadcast equipment, including core components like High Power AM transmitters and Antenna Tuners (ATUs). This ensures a smooth transition or integration from existing AM broadcasting systems without the need to replace existing setups.
- Tailored Features: The stereo solid-state High Power AM transmitters from FMUSER are specifically designed to meet the diverse needs of different sectors and management preferences, making them ideal for government AM broadcast stations and other facilities.
- Practical Broadcasting Functions: FMUSER's transmitters come equipped with practical AM broadcasting functionalities tailored for real-world scenarios. Features include PDM Modulation, built-in impedance matching units, modular architecture with a 15-inch menu touch board, and power modules with PLUG-IN connections, ensuring ease of use and safety.
- Turnkey Solutions: FMUSER provides a complete turnkey AM broadcast solution suitable for newly established AM broadcast stations or existing facilities seeking effective upgrade options. Their industry-leading solid-state cabinet-type High Power AM transmitters ensure robust signal processing, complemented by user-friendly software for seamless management of broadcast requirements.
II. Why Choose FMUSER High Power AM Transmitters?
At FMUSER, we recognize the unique needs of our clients. That’s why we collaborate with various organizations to offer tailored AM broadcast solutions.
Our AM transmitters are engineered to enhance the broadcasting experience, whether for community radio, commercial broadcasting, emergency services, educational institutions, live broadcasts, timely news updates, or community programs, ensuring exceptional transmission quality and extensive coverage.
1. Comprehensive AM Broadcast Solutions for Diverse Sectors
FMUSER offers the necessary equipment to meet the diverse requirements of both technical and creative roles, addressing the needs of various sectors across the AM broadcast industry, including but not limited to:
- AM Broadcast Stations: AM broadcast stations serve as the backbone of audio content delivery in a community, reaching vast audiences with diverse programming. These stations require reliable and efficient transmitters to ensure seamless broadcasts, especially during peak listening times. Station managers and engineers depend on FMUSER’s AM transmitter solutions for clarity and stability to maintain listener trust and satisfaction.
- Local Radio Networks: Local radio networks play a crucial role in connecting communities and disseminating relevant information. These networks require AM transmitter solutions that enable them to broadcast local news, weather updates, and community events effectively. Content producers within these networks need tools that can help them develop engaging and diverse programming.
- Masangano Enharaunda: Community organizations often rely on local broadcasting to communicate vital information and engage with residents effectively. They need AM transmitters that facilitate easy access to broadcasting capabilities, allowing them to reach local audiences without extensive technical knowledge.
- Broadcasting Solution Companies: As traditional media broadcasting evolves, AM transmitter solutions are becoming increasingly vital for audio content delivery. Local and overseas broadcasting solution companies have a tremendous opportunity to support their clients by adopting FMUSER's AM transmitter solutions. These solutions not only meet the growing demand for efficient broadcasting but also cater to the specific needs of various stakeholders, including local business associations and content creators.
We invite broadcasting companies and top management in different organizations who are interested in enhancing their service offerings to keep reading to learn more about FMUSER’s comprehensive AM transmitter solutions. Our team is committed to supporting your broadcasting goals, ensuring that you have the tools and technology needed to thrive in today’s dynamic broadcast environment.
2. Main Features of FMUSER's High Power AM Transmitter Solution
FMUSER's AM transmitter solution is engineered to meet the demands of modern broadcasting while enhancing long-distance AM broadcasting quality and operational efficiency for broadcast organizations.
Below are the key features that make FMUSER's AM transmitters an essential choice for broadcasters:
- High Working Efficiency: FMUSER AM transmitters boast high working efficiency, designed to save costs and reduce maintenance efforts. Their robust construction ensures durability, making them an ideal long-term investment for broadcast companies. By reducing operational costs through efficient energy use and minimal maintenance needs, these transmitters enhance reliability, allowing broadcast organizations to maintain consistent transmission without frequent interruptions.
- Modular Dhizaini: The modular design of FMUSER's AM transmitters provides a compact and highly redundant setup, ensuring easy maintenance and scalability. Quick and simple component replacement minimizes downtime during maintenance, while the compact size allows for efficient use of space in the broadcast facility, making it easier to fit into existing setups.
- All-in-One Complete Design: The compact model design of this series of AM transmitters makes efficient modular maintenance and quick-response functionality a reality. The built-in backup exciter will automatically turn on after a fault occurs, providing RF carrier to the power module and controlling the signal modulation. With these professional AM transmitters from the Chinese supplier FMUSER, you will be able to use the limited radio layout space more flexibly and efficiently, thereby improving the overall operating efficiency of the radio.
- APP Remote Control: Equipped with remote control capabilities through a dedicated app, FMUSER AM transmitters enable quick responses and easy management of broadcast operations. This high maintenance efficiency allows operators to control the transmitter from any location, reducing maintenance costs as issues can be diagnosed and rectified without needing to be physically present at the site.
- Reliable Circuit Design System: The transmitter features an innovative circuit that dynamically stabilizes the power supply, which prevents AC line voltage fluctuations. It automatically restores previous operating states after AC power interruptions or overloads, providing essential overvoltage protection to safeguard the system against damage. Additionally, the system allows for rapid frequency adjustments without the need for special tools or external test equipment, ensuring optimal performance and reliability.
- Real-Time Data Monitoring: The FMUSER AM transmitter features a comprehensive HD built-in dashboard with a direct monitoring screen, allowing for efficient data management. Quick responses to operational changes and issues ensure optimal broadcast performance, as continuous monitoring of critical parameters such as transmitter power, impedance, voltage, and current reduces maintenance costs through proactive management.
- Simba-Kuchengetedza: Designed with eco-friendliness in mind, FMUSER's AM transmitters are energy-efficient, significantly reducing electricity bills and minimizing complaints from local environmental protection departments. This not only leads to cost savings on energy expenditures, contributing to better overall profitability for broadcasting organizations, but also creates a positive environmental impact that enhances the organization's reputation within the community.
- Kupisa-Swappable Dhizaini: FMUSER AM transmitters feature a hot-swappable design, allowing components to be replaced without shutting down the entire system. This continuous operation during maintenance ensures uninterrupted broadcasting and reduces downtime, which enhances the efficiency of broadcast operations and improves reliability.
- Built-in Backup Exciter: The AM transmitter comes with a built-in backup exciter that automatically switches on when the main exciter fails, ensuring continuous operation. This feature provides ample troubleshooting time for engineers, significantly reducing the risk of broadcast termination and guaranteeing reliability in transmission, thereby enhancing audience trust and satisfaction.
- Built-in Safe Control: Safety is paramount in broadcast operations. FMUSER's AM transmitter includes a mechanical key for engineer-only access and a fail-safe system for emergency auto-shutdown. These enhanced safety measures protect both personnel and equipment during electrical failures, while additional series-connected switches allow for quick power disconnection to ensure uninterrupted adherence to safety protocols.
- Yakasimba Dhizaini: Constructed from corrosion-resistant aluminum and featuring an anti-radiation case and shielding structure, FMUSER's AM transmitters are built to withstand the rigors of broadcasting. The use of gold plating technology on core components, such as the power amplifier board, ensures long-lasting performance and oxidation resistance, while a robust fan system maintains optimal internal temperatures, ensuring continuous and efficient operational performance.
3. Enhance Your Broadcasting Capabilities with FMUSER's Services
FMUSER offers a suite of services designed to empower organizations and enhance their broadcasting capabilities. With a focus on integrated solutions, expert support, and comprehensive training, FMUSER ensures that clients have everything they need to succeed in the dynamic world of AM broadcasting.
- Integrated AM Transmitter Packages for Broadcast Stations: FMUSER provides fully integrated AM transmitter packages tailored for broadcast stations of all sizes, including options for output power ranging from 1kW to 200kW or higher. Each package includes essential components such as cabinet-type AM dummy loads, AM studio to transmitter link (STL), AM antenna tuning units (ATU), and complete antenna systems. Additionally, passive equipment like combiners and couplers, along with full AM broadcast studio equipment—from studio desks to microphones—are included. This comprehensive approach allows organizations to either update their existing AM broadcast station or build a new one from scratch. The tailored hardware and software configurations are designed to meet specific broadcast specifications and budgetary needs, ensuring scalability and flexibility for diverse broadcasting requirements.
- Expert On-Site Installation Services: FMUSER's expert on-site installation services guarantee a smooth operational handover. The experienced team provides prompt installation and commissioning, ensuring all components are correctly set up and functioning optimally. This hands-on approach minimizes the risk of errors and accelerates the transition to live broadcasting, allowing organizations to focus on content delivery rather than technical concerns.
- Pre-Configured AM Transmitter Systems for Quick Deployment: To facilitate rapid deployment, FMUSER offers pre-configured AM transmitter systems that are thoroughly tested and ready for seamless plug-and-play use upon arrival. These systems undergo pre-installation assessments to ensure compatibility with existing infrastructure, significantly reducing setup time and ensuring organizations can quickly resume or start their broadcasting operations without delays.
- Comprehensive Training on Operation for Technical Staff: Understanding that skilled personnel are crucial for successful broadcasting, FMUSER provides comprehensive training programs for technical staff. This includes online learning modules and hands-on training led by FMUSER's engineering team. By equipping staff with the knowledge and skills necessary to operate and maintain the broadcasting equipment efficiently, organizations can maximize their investment and ensure smooth day-to-day operations.
- 24/7 Tsigiro yehunyanzvi: FMUSER recognizes that broadcasting operations run around the clock, which is why the company offers 24/7 technical support. The Engineers Support Group is available at all times to assist with installation and operational questions. This round-the-clock assistance ensures that organizations can address any issues promptly, minimizing downtime and maintaining consistent broadcast quality.
Since 2002, we have supplied thousands of AM radio stations worldwide with affordable, high-quality products, all designed to enhance broadcast quality while minimizing costs for new stations or equipment replacements. Our commitment to excellence has significantly improved the broadcasting experience for countless listeners, thanks to FMUSER’s state-of-the-art solutions.
V. Essential Gear of FMUSER High Power AM Transmitter Solution
1. High Power AM Transmitter
The heart of the AM broadcasting system, available in various power outputs from 1kW to over 200kW. These transmitters modulate audio signals onto a carrier wave for broadcast. The choice of transmitter power depends on the coverage area and specific broadcasting requirements. As a professional supplier of AM broadcasting equipment, FMUSER delivers significant cost advantages and high product performance. Our industry-leading AM broadcasting solutions serve numerous large AM stations globally, featuring a range of high power AM Transmitters ranges from 1KW, 3KW, 5KW, 10KW, 25KW, 50KW, 100KW, and 200kW
Recommended high power AM transmitters for you:
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| 1KW AM Transmitter | 3KW AM Transmitter | 5KW AM Transmitter | 10KW AM Transmitter |
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| 25KW AM Transmitter | 50KW AM Transmitter | 100KW AM Transmitter | 200KW AM Transmitter |
2. Cabinet-Type AM Dummy Loads
Testing transmitters without radiating signals is crucial. This is done using devices that convert RF energy into heat, simulating an antenna load while protecting the transmitter during setup and maintenance. Due to the high power levels of many FMUSER RF amplifiers and transmitters, testing with actual loads can risk damage. Regular maintenance and testing of medium wave transmitters emphasize the need for high-quality test loads in broadcast stations. FMUSER manufactures all-in-one test loads that allow for remote control and automatic or manual switching, enhancing AM broadcast system management.
Recommended high power AM Dummy loads for you:
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| 1, 3, 10KW AM bvunzo mutoro | 100KW AM transmitter bvunzo mutoro | 200KW AM transmitter bvunzo mutoro |
3. AM Studio to Transmitter Link (STL)
This equipment facilitates the wireless transfer of audio signals from the studio to the transmitter site. It ensures reliable, high-quality audio transmission, essential for maintaining broadcast integrity over long distances.
4. AM Antenna Tuning Unit (ATU)
This equipment facilitates the wireless transfer of audio signals from the studio to the transmitter site, ensuring reliable, high-quality audio transmission that is essential for maintaining broadcast integrity over long distances.
However, factors such as thunderstorms, rain, and humidity can cause impedance deviations in AM transmitter antennas, which typically operate at 50 Ω. To address this issue, an impedance matching system is necessary to re-match the antenna impedance effectively. FMUSER's contactless impedance system is specifically designed for adaptive impedance adjustment of AM broadcast antennas, allowing for automatic correction when the antenna impedance deviates from the standard. Once a deviation occurs, the adaptive system adjusts the modulation network to re-match the impedance to 50 Ω, thereby ensuring optimal transmission quality for your AM transmitter.
5. AM Transmitter Antenna Systems
These systems are designed to radiate the modulated signal into the atmosphere. The configuration (e.g., vertical or horizontal polarization) and height are crucial for determining the broadcast range and quality.
Recommended high power AM antennas for you:
| Medium Wave Antenna Famility | |||
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| Omni-directional for receiving | Directional for Transmission | AM Shunt Fed |
Log-periodic |
| Shortwave Antenna Family | |||
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| Omni-inotungamira |
keji |
Curtain Arrays 8/4/h |
Curtain Arrays 4/4/h |
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| Curtain Arrays 4/2/h |
Curtain Arrays 2/2/h |
Curtain Arrays 2/1/h |
Rotatable Curtain Arrays |
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| Omni-directional Quadrant |
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6. FMUSER's AM Module Test Stands
Iwo anomira ebvunzo anonyanya kugadzirwa kuti ave nechokwadi chekuti AM transmitters ari mumamiriro akanaka ekushanda mushure mekugadziriswa kwebuffer amplifier uye simba amplifier board. Kana uchinge wapfuura bvunzo, iyo transmitter inogona kushanda zvakanaka - izvi zvinobatsira kudzikisa chiyero chekutadza uye kumiswa.
7. Complete AM Broadcast Studio Equipment
This includes everything from studio desks and mixing consoles to microphones and audio processors. The setup is tailored to create high-quality audio content, critical for engaging broadcasts.
Ready to elevate your broadcasting experience? FMUSER offers cutting-edge AM transmitter solutions tailored to your unique needs, whether you’re upgrading an existing setup or building a new broadcast station. Our comprehensive range of equipment and expert services ensures you have everything necessary for optimal performance and audience engagement.
Don’t miss the opportunity to transform your operations—taura nesu nhasi to learn more about how FMUSER can help you succeed in the competitive broadcasting landscape!
- Nzira yekusarudza yakanakisa AM Broadcast Transmitter?
- Pakusarudza yakanakisa AM Broadcast Transmitter ye AM radio chiteshi, pane akati wandei zvinhu zvekufunga nezvazvo. Kutanga, iwe unofanirwa kufunga nezve simba rekubuda kweiyo transmitter, sezvo izvi zvichange zvichiona chiratidzo chechiratidzo. Iwe unofanirwawo kufunga nezvemhando yemodulation iyo transmitter inotsigira, sezvo izvi zvichiona kunaka kwekubuda kwezwi. Pamusoro pezvo, funga nezve mutengo weiyo transmitter uye iyo yakazara mutengo wevaridzi senge kugadzirisa, zvikamu, uye mitengo yekuisa. Chekupedzisira, funga nezvesevhisi yevatengi uye mushure mekutengesa sevhisi inowanikwa kubva kumugadziri.
- Inosvika papi iyo AM kutepfenyura transmitter kuvhara?
- Simba rinonyanya kubuda re AM nhepfenyuro inotenderera kubva pa500 watts kusvika pa50,000 watts. Huwandu hwekuvhara hunoenderana nerudzi rweantenna inoshandiswa, uye inogona kubva kubva mamaira akati wandei kusvika mazana emamaira akati wandei.
- Chii chinotarisa kufukidzwa kwe AM Broadcast Transmitter uye nei?
- Kuvharidzirwa kwe AM Broadcast Transmitter kunotemerwa nekubuda kwesimba, kureba kweantenna, uye kuwana antenna. Iyo yakakwirira simba rinobuda, iyo yakakura nzvimbo yekuvhara. Saizvozvo, iyo yakakwira iyo antenna kureba, iyo inoenderera iyo chiratidzo chemutumiri chinogona kusvika. Antenna kuwana zvakare inowedzera iyo transmitter yekuvhara nzvimbo, sezvo inotarisisa chiratidzo mune yakananga nzira.
- Ndeapi marudzi eredhiyo chiteshi antenna anoshandiswa kune AM Broadcast Transmitter?
- Medium Wave (MW) Transmitter: A medium wave transmitter imhando yeredhiyo transmitter inoshandisa yepakati frequency (MF) mafungu ari pakati pe500 kHz kusvika 1.7 MHz. Aya masaini anogona kufamba kupfuura masaisai eshortwave uye anogona kushandiswa kutepfenyura nhepfenyuro yemuno, yedunhu, kana yepasi rose. Medium wave masaini anogona kunzwika pamaredhiyo e AM uye anowanzo shandiswa kunhau, hurukuro, uye mimhanzi.
Shortwave (SW) Transmitter: Shortwave transmitter imhando yeradio transmitter inoshandisa shortwave frequencies muchikamu che3-30 MHz. Aya masaini anogona kufamba kupfuura masaisai epakati uye anogona kushandiswa kutepfenyura nhepfenyuro dzepasi rose. Masaini eShortwave anogona kunzwika pamaredhiyo eshortwave uye anowanzoshandiswa kunhau dzepasirese nemimhanzi.
Longwave (LW) Transmitter: A longwave transmitter imhando yeredhiyo transmitter inoshandisa marefu marefu muhuwandu hwe150-285 kHz. Aya masaini anogona kufamba kupfuura masaisai eshortwave nepakati uye anogona kushandiswa kutepfenyura nhepfenyuro dzepasi rose. Masaini eLongwave anogona kunzwika paredhiyo refu uye anowanzo shandiswa kunhau dzepasirese nemimhanzi.
Kusarudza pakati peaya ma transmitter zvinoenderana nerudzi rwenhepfenyuro yauri kuedza kutumira. Mafungu epakati akanakira kutepfenyura kwemuno neredunhu, shortwave ndiyo yakanakira kutepfenyura kune dzimwe nyika, uye longwave ndiyo yakanakira kutepfenyura kwedaro refu.
Misiyano mikuru pakati peatatu ma transmitters ndiwo ma frequency aanoshandisa uye chinhambwe chinogona kufamba nemasaini. Masaisai epakati anogona kufamba kusvika makiromita 1,500 (930 mamaira), masaini eshortwave anogona kufamba kusvika makiromita 8,000 (5,000 mamaira), uye masaini marefu anogona kufamba kusvika makiromita gumi (10,000 mamaira). Pamusoro pezvo, masaini epakati nemasaisai ndiwo asina kusimba uye anowanzo kanganisa, nepo masaini marefu ari iwo akasimba uye asingatani kukanganiswa.
- Chii chinonzi medium wave transmitter, shortwave transmitter, uye longwave transmitter?
- Medium Wave (MW) Transmitter: A medium wave transmitter imhando yeredhiyo transmitter inoshandisa yepakati frequency (MF) mafungu ari pakati pe500 kHz kusvika 1.7 MHz. Aya masaini anogona kufamba kupfuura masaisai eshortwave uye anogona kushandiswa kutepfenyura nhepfenyuro yemuno, yedunhu, kana yepasi rose. Medium wave masaini anogona kunzwika pamaredhiyo e AM uye anowanzo shandiswa kunhau, hurukuro, uye mimhanzi.
Shortwave (SW) Transmitter: Shortwave transmitter imhando yeradio transmitter inoshandisa shortwave frequencies muchikamu che3-30 MHz. Aya masaini anogona kufamba kupfuura masaisai epakati uye anogona kushandiswa kutepfenyura nhepfenyuro dzepasi rose. Masaini eShortwave anogona kunzwika pamaredhiyo eshortwave uye anowanzoshandiswa kunhau dzepasirese nemimhanzi.
Longwave (LW) Transmitter: A longwave transmitter imhando yeredhiyo transmitter inoshandisa marefu marefu muhuwandu hwe150-285 kHz. Aya masaini anogona kufamba kupfuura masaisai eshortwave nepakati uye anogona kushandiswa kutepfenyura nhepfenyuro dzepasi rose. Masaini eLongwave anogona kunzwika paredhiyo refu uye anowanzo shandiswa kunhau dzepasirese nemimhanzi.
Kusarudza pakati peaya ma transmitter zvinoenderana nerudzi rwenhepfenyuro yauri kuedza kutumira. Mafungu epakati akanakira kutepfenyura kwemuno neredunhu, shortwave ndiyo yakanakira kutepfenyura kune dzimwe nyika, uye longwave ndiyo yakanakira kutepfenyura kwedaro refu.
Misiyano mikuru pakati peatatu ma transmitters ndiwo ma frequency aanoshandisa uye chinhambwe chinogona kufamba nemasaini. Masaisai epakati anogona kufamba kusvika makiromita 1,500 (930 mamaira), masaini eshortwave anogona kufamba kusvika makiromita 8,000 (5,000 mamaira), uye masaini marefu anogona kufamba kusvika makiromita gumi (10,000 mamaira). Pamusoro pezvo, masaini epakati nemasaisai ndiwo asina kusimba uye anowanzo kanganisa, nepo masaini marefu ari iwo akasimba uye asingatani kukanganiswa.
- Ndeapi mashandisirwo eAM Broadcast Transmitter?
- Izvo zvinonyanya kushandiswa zve AM Broadcast Transmitter iredhiyo neterevhizheni kutepfenyura. AM Broadcast Transmitters anoshandiswa kutumira masaini masaini semasaisai eredhiyo kuti agamuchirwe neredhiyo, terevhizheni, uye zvimwe zvishandiso. Mamwe maapplication e AM Broadcast Transmitter anosanganisira kutumira isina waya data, kupa isina waya kutaurirana, uye kutumira maodhiyo nemavhidhiyo masaini.
- Mangani marudzi e AM Broadcast Transmitter aripo?
- Kune matatu makuru emhando dzeAM nhepfenyuro transmitters: yakaderera-simba, yepakati-simba, uye yakakwirira-simba. Low-power transmitters anowanzo shandiswa kutepfenyura-pfupi, uye ane huwandu hunosvika matanhatu mamaira. Madhiraivha emagetsi epakati ane huwandu hunosvika mamaira makumi mashanu, uye anoshandiswa kutepfenyura-epakati. Mabatirwo emagetsi epamusoro-soro anoshandiswa kutepfenyura kwenguva refu, uye ane huwandu hunosvika mazana maviri mamaira. Musiyano mukuru pakati peaya ma transmitters huwandu hwesimba ravanogadzira, uye huwandu hwavanogona kuvhara.
- Nzira yekubatanidza AM Broadcast Transmitter?
- 1. Ita shuwa kuti transmitter yakadzikwa zvakanaka uye mitemo yese yekuchengetedza inoteverwa.
2. Batanidza sosi yekuteerera kune inotumira. Izvi zvinogona kuitwa kuburikidza neaudio mixer, CD player, kana chero imwe audio source.
3. Batanidza antenna kune transmitter. Iyo antenna inofanirwa kugadzirwa ye AM kutepfenyura frequency uye yakamisikidzwa kune yakakwana yemhando yechiratidzo.
4. Iva nechokwadi chokuti tambo dzose uye zvibatanidza zvakachengeteka uye zviri mumamiriro akanaka.
5. Batanidza transmitter kune sosi yemagetsi, woibatidza.
6. Rongedza danho resimba rekutapurirana kusvika padanho raunoda, sezvinoratidzwa nemirairo yemugadziri.
7. Tune the transmitter kune yaunoda frequency.
8. Chengetedza simba rechiratidzo uye hutano nemita yechiratidzo kuti uone kuti inosangana nemitemo yose.
9. Edzai chiratidzo chekutepfenyura uye ita chero zvigadziriso zvinodiwa.
- Ndechipi chimwe chishandiso chandinoda kuti nditange yakazara AM radio chiteshi?
- Kuti utange yakakwana AM radio station, iwe unozoda antenna, magetsi, modulation monitor, audio processor, jenareta, transmitter inobuda sefa, uye studio-transmitter link.
- Ndeapi akanyanya kukosha zvirevo zve AM Broadcast Transmitter?
- Izvo zvakanyanya kukosha zvemuviri uye RF zvakatemwa zve AM Broadcast Transmitter ndezvi:
Physical:
-Simba rinobuda
-Modulation index
-Frequency kugadzikana
-Kushanda tembiricha siyana
-Antenna mhando
RF:
-Frequency range
-Emission mhando
-Channel spacing
-Bandwidth
-Spurious emission mazinga
- Nzira yekuchengetedza AM radio station?
- Kuita gadziriso yemazuva ese ye AM kutepfenyura transmitter muredhiyo ye AM, injiniya anofanira kutanga nekuita ongororo yekuona yemidziyo. Izvi zvinosanganisira kuve nechokwadi chekuti zvese zvinongedzo zvakachengeteka uye kutsvaga chero zviratidzo zvekukuvadzwa kwemuviri. Injiniya anofanirwawo kutarisa mazinga eRF ekubuda kuti ave nechokwadi chekuti vanoteedzera mirau yeFCC. Pamusoro pezvo, injinjiniya inofanirwa kutarisa mazinga emodulation, frequency kurongeka, uye mazinga ekuteerera kune chero odhiyo yekugadziridza michina. Injiniya inofanirwawo kuongorora iyo antenna system, kusanganisira yekubatanidza uye pasi. Chekupedzisira, mainjiniya anofanirwa kuyedza chero masisitimu ekuchengetedza uye ave nechokwadi chekuti transmitter yakanyatsotonhorera.
- Maitiro ekugadzirisa AM Broadcast Transmitter kana ikatadza kushanda?
- Kugadzirisa AM nhepfenyuro yekuparadzira uye kutsiva zvikamu zvakaputsika zvinoda ruzivo rwemagetsi uye kuwana maturusi akakodzera uye zvikamu zvinotsiva. Danho rekutanga nderekutsvaga panobva dambudziko. Izvi zvinogona kuitwa kuburikidza nekutarisa nekuona kwezvakakuvadzwa kana kutyoka zvikamu, kana kuita bvunzo dzekuongorora kana chikanganiso chaicho chisiri pachena. Pakangozivikanwa bviro yedambudziko, danho rinotevera nderekutsiva zvikamu zvakaputsika, kana zvichidikanwa. Zvichienderana nerudzi rwekutapurirana, izvi zvinogona kusanganisira kubatanidza zvinhu zvitsva pabhodhi redunhu, kana kusunungura uye kutsiva nhengo dzemuviri. Kana zvikamu zvitsva zvangoiswa, iyo inotumira inofanirwa kuongororwa kuti ive nechokwadi chekuti iri kushanda nemazvo.
- Chii chinonzi chimiro che AM Broadcast Transmitter?
- Iyo yakakosha chimiro che AM Broadcast Transmitter ine oscillator, modulator, amplifier, antenna, uye magetsi. Iyo oscillator inogadzira chiratidzo cheredhiyo, modulator inogadzirisa chiratidzo neruzivo rweodhiyo, iyo amplifier inowedzera simba rechiratidzo, antenna inopenya chiratidzo, uye magetsi anopa simba rinodiwa kuti mudziyo ushande. Iyo oscillator ndiyo inonyanya kukosha dhizaini pakuona hunhu uye kuita kwe AM Broadcast Transmitter, sezvo ichitarisa kuwanda kwechiratidzo. Pasina oscillator, AM Broadcast Transmitter yaisazokwanisa kushanda zvakajairwa.
- Makadii?
- Ndiripo
- Kuganhurirwa kweAmplitude Modulation
-
1. Yakaderera Kubudirira - Sezvo simba rinobatsira riri mumabhendi madiki riri diki, saka kushanda kwe AM system kwakadzikira.
2. Limited Operating Range - Kuwanda kwekushanda kuduku nekuda kwekushanda kwakaderera. Saka, kutapurirana kwezviratidzo kwakaoma.
3. Noise muReception - Sezvo mugamuchiri weredhiyo achiona zvichinetsa kusiyanisa pakati pemakuriro akasiyana-siyana anomiririra ruzha neaya ane masaini, ruzha rukuru rwunowanzoitika mukugamuchira.
4. Hunhu Hwakashata Hweaudio -Kuwana kutendeseka kwepamusoro, mafambiro ese ekuteerera kusvika 15 KiloHertz anofanirwa kudhindwa uye izvi zvinoda bandwidth ye10 KiloHertz kuderedza kukanganiswa kunobva kune nhepfenyuro dziri pedyo. Saka mu AM nhepfenyuro yemhando yeaudio inozivikanwa kuve yakashata.
- Kushandisa & Kushandiswa kweAmplitude Modulation
-
1. Nhepfenyuro dzeredhiyo
2. Nhepfenyuro dzeTV
3. Gonhi regaraji rinovhura maremote asina keyless
4. Inotumira zviratidzo zveTV
5. Short wave radio communications
6. Two way radio communication
- Kuenzanisa kwakasiyana AM
-
VSB-SC
1. tsananguro -A vestigial sideband (mukutaurirana neredhiyo) ibhande repadivi rakadimburwa chikamu kana kudzvinyirirwa.
2. kunyoresa -Nhepfenyuro yeTV & kutepfenyura redhiyo
3. tizvishandise - Inotumira zviratidzo zveTV
SSB-SC
1. tsananguro -Single-sidebandmodulation (SSB) iko kunatsiridza kweamplitude modulation iyo inonyanya kushandisa simba remagetsi uye bandwidth.
2. kunyoresa - Nhepfenyuro yeTV & nhepfenyuro yeShortwave Radio
3. tizvishandise - Shortwave radio communications
DSB-SC
1. tsananguro -Mukutaurirana neredhiyo, parutivi bhendi ibhendi remafrequency akakwira kupfuura kana kudzika kupfuura frequency yekutakura, ine simba semhedzisiro yemaitiro ekugadzirisa.
2. kunyoresa -Nhepfenyuro yeTV & kutepfenyura redhiyo
3. tizvishandise - 2-nzira redhiyo kutaurirana
PARAMETER
VSB-SC
SSB-SC
DSB-SC
tsananguro
A vestigial sideband (mukutaurirana neredhiyo) ibhande repadivi rakadimburwa chikamu kana kudzvinyirirwa.
Single-sidebandmodulation (SSB) iko kunatsiridza kweamplitude modulation iyo inonyanya kushandisa simba remagetsi uye bandwidth.
Mukutaurirana neredhiyo, bhendi repadivi ibhendi remafrequency akarikwira kupfuura kana kudzika kupfuura frequency yekutakura, ine simba semhedzisiro yemaitiro ekugadzirisa.
kunyoresa
Nhepfenyuro dzeTV & kutepfenyura kweRadio
Nhepfenyuro dzeTV & nhepfenyuro yeShortwave Radio
Nhepfenyuro dzeTV & kutepfenyura kweRadio
tizvishandise
Inotumira zviratidzo zveTV
Shortwave radio communications
2-nzira redhiyo kutaurirana
- A Complete Guide to Amplitude Modulations (AM)
-
Chii chinonzi Amplitude Modulation (AM)?
- "Modulation inzira yekusimudzira yakaderera frequency chiratidzo pane yakakwira frequency mutakuri chiratidzo."
- "Iyo modulation maitiro anogona kutsanangurwa sekusiyanisa iyo RF inotakura wave zvinoenderana nehuchenjeri kana ruzivo mune yakaderera frequency chiratidzo."
- "Modulation inotsanangurwa sekutanga iyo mamwe maitiro, kazhinji amplitude, frequency kana chikamu, chemutakuri chinosiyana zvichienderana nekukosha kwepakarepo kweimwe imwe voltage, inonzi modulating voltage."
Nei Kuchinja Kunodiwa?
1. Kana mapurogiramu maviri enziyo akaridzwa panguva imwe chete mukati medaro, zvingava zvakaoma kuti munhu upi noupi ateerere kune imwe sosi orega kunzwa manyuko echipiri. Sezvo kurira kwese kwemumhanzi kuine anenge ma frequency renji, gadzira anenge 50 Hz kusvika 10KHz. Kana chirongwa chaunoda chichikwidzwa kusvika kubhendi remafrequency ari pakati pe100KHz ne110KHz, chirongwa chechipiri chichikwira kuenda kubhendi pakati pe120KHz ne130KHz, Zvino zvirongwa zvese zvakapa 10KHz bandwidth uye muteereri anogona (nekusarudza bhendi) kutora chirongwa. nesarudzo yake. Iye anogashira aizodzika achichinja chete bhendi rakasarudzwa remafrequency kuenda kumhando yakakodzera ye50Hz kusvika 10KHz.
2. Chimwe chikonzero chechipiri chehunyanzvi chekuchinja chiratidzo chemeseji kune yakakwira frequency inoenderana nehukuru hweantenna. Izvo zvinofanirwa kucherechedzwa kuti saizi yeantenna inopindirana neiyo frequency yekuratidzwa. Aya ndiwo 75 metres pa1 MHz asi pa15KHz yawedzera kusvika pa5000 metres (kana kungopfuura 16,000 tsoka) antenna yakatwasuka yesaizi iyi haigoneke.
3. Chikonzero chechitatu chekugadzirisa high frequency carrier ndechekuti RF (redhiyo frequency) simba richafamba chinhambwe chikuru pane yakaenzana simba rinofambiswa sesimba rekurira.
Mhando dzekusiyanisa
Chiratidzo chekutakura iine wave pane inotakura frequency. Pazasi equation inoratidza kuti sine wave ine matatu maitiro anogona kushandurwa.
Instantaneous voltage (E) =Ec(max)Sin(2πfct + θ)
Izwi ringangove rakasiyana ndeye inotakura voltage Ec, inotakura frequency fc, uye inotakura chikamu angle. θ. Saka mafomu matatu ekuchinja anogoneka.
1. Amplitude Modulation
Amplitude modulation kuwedzera kana kuderera kweiyo inotakura voltage (Ec), zvimwe zvinhu zvese zvinosara zvisingaite.
2. Frequency Modulation
Frequency modulation ishanduko mune inotakura frequency (fc) nezvimwe zvese zvinosara zvisingaite.
3. Phase Modulation
Phase modulation shanduko mune yekutakura chikamu angle (θ) Chikamu chekona hachigone kuchinja pasina kukanganisawo shanduko yehuwandu. Naizvozvo, chikamu modulation chiri muchokwadi chimiro chechipiri che frequency modulation.
TSANANGURO YEAM
Iyo nzira yekusiyanisa amplitude yeakakwira frequency carrier wave zvinoenderana neruzivo rwunozofambiswa, kuchengetedza frequency uye chikamu cheiyo inotakura wave isina kuchinjika inonzi Amplitude Modulation. Iyo ruzivo inoonekwa seye modulating chiratidzo uye inokwidziridzwa pane inotakura wave nekushandisa ese ari maviri kune modulator. Iyo yakadzama dhizaini inoratidza amplitude modulation process inopiwa pazasi.
Sezvinoratidzwa pamusoro, iyo inotakura wave ine yakanaka uye yakaipa hafu mitsetse. Ese madenderedzwa aya anosiyana zvichienderana neruzivo rwunozotumirwa. Mutakuri anobva aita sine mafungu ayo amplitudes anotevera maamplitude akasiyana eiyo modulating wave. Mutakuri anochengetwa muhamvuropu yakagadzirwa nemodulating wave. Kubva pane iyo nhamba, iwe unogona zvakare kuona kuti iyo amplitude mutsauko weiyo yakakwira frequency inotakura iri paiyo frequency yechiratidzo uye kuwanda kweiyo inotakura wave yakafanana nekuwanda kweiyo wave wave.
Kuongororwa kweAmplitude Modulation Carrier Wave
Rega vc = Vc Sin wct
vm = Vm Sin wmt
vc - Kukosha kwepakarepo kwemutakuri
Vc - Peak kukosha kwemutakuri
Wc - Angular velocity yemutakuri
vm -Kukosha kwepakarepo kweiyo modulating chiratidzo
Vm -Kunyanya kukosha kweiyo modulating chiratidzo
wm - Angular velocity yeiyo modulating chiratidzo
fm - Modulating chiratidzo frequency
Izvo zvinofanirwa kucherechedzwa kuti chikamu chekona chinoramba chiripo mukuita uku. Nokudaro inogona kufuratirwa.
Izvo zvinofanirwa kucherechedzwa kuti chikamu chekona chinoramba chiripo mukuita uku. Nokudaro inogona kufuratirwa.
Iyo amplitude yemutakuri wave inosiyana pa fm. Iyo amplitude modulated wave inopiwa ne equation A = Vc + vm = Vc + Vm Sin wmt.
= Vc [1+ (Vm/Vc Sin wmt)]
= Vc (1 + mSin wmt)
m - Modulation Index. Chiyero cheVm/Vc.
Pakarepo kukosha kweamplitude modulated wave inopiwa ne equation v = A Sin wct = Vc (1 + m Sin wmt) Sin wct
= Vc Sin wct + mVc (Sin wmt Sin wct)
v = Vc Sin wct + [mVc/2 Cos (wc-wm)t – mVc/2 Cos (wc + wm)t]
Equation iri pamusoro inomiririra huwandu hwemasaisai matatu. Imwe ine amplitude yeVc uye frequency yewc/2, yechipiri ine amplitude yemVc/2 uye frequency ye (wc - wm)/2 uye yechitatu ine amplitude yemVc/2 uye frequency ye (wc). + wm)/2 .
Mukuita iyo angular velocity yemutakuri inozivikanwa kuve yakakura kupfuura angular velocity yemodulating chiratidzo (wc >> wm). Saka, yechipiri neyechitatu cosine equations iri padyo neiyo frequency yekutakura. Iyo equation inomiririrwa nemifananidzo sezvakaratidzwa pasi apa.
Frequency Spectrum ye AM Wave
Lower side frequency – (wc – wm)/2
Yepamusoro side frequency - (wc +wm)/2
Iwo ma frequency ezvikamu aripo mu AM wave anomiririrwa nemitsara yakatwasuka inenge iri padivi pe frequency axis. Kureba kwemutsara wega wega wakatwasuka unoenderana neamplitude yayo. Sezvo angular velocity yemutakuri yakakura kudarika angular velocity yemodulating siginecha, iyo amplitude yedivi bhendi frequencies haigone kudarika hafu yeanotakura amplitude.
Saka hapazove neshanduko muhuwandu hwepakutanga, asi mabhendi eparutivi (wc - wm)/2 uye (wc +wm)/2 achashandurwa. Iyo yekutanga inonzi yekumusoro bhendi bhendi (USB) frequency uye iyo gare gare inozivikanwa seyezasi side bhendi (LSB) frequency.
Sezvo chiratidzo che frequency wm/2 chiripo mumabhendi eparutivi, zviri pachena kuti chinotakura magetsi hachifambisi chero ruzivo.
Maviri eparutivi mabhendi ma frequency anogadzirwa kana mutakuri ari amplitude akagadziridzwa neakawanda frequency. Kureva kuti AM wave ine bhendi hupamhi kubva (wc - wm)/2 kusvika (wc +wm)/2, kureva, 2wm/2 kana kaviri frequency yechiratidzo inogadzirwa. Kana iyo modulating siginecha iine anopfuura imwe frequency, maviri edivi bhendi ma frequency anogadzirwa neakawanda frequency. Saizvozvo kune maviri ma frequency eiyo modulating siginecha 2 LSB's uye 2 USB's frequency ichagadzirwa.
Iwo mabhendi epadivi emafrequency aripo pamusoro peiyo inotakura frequency ichafanana neiyo iripo pazasi. Iwo epadivi bhendi mafrequency aripo pamusoro peiyo inotakura frequency inozivikanwa seyepamusoro side bhendi uye ese ari pasi peiyo inotakura frequency ndeyeyezasi side bhendi. Iwo ma USB frequency anomiririra mamwe emunhu ega ega modulating frequency uye iyo LSB frequency inomiririra mutsauko pakati peiyo modulating frequency uye inotakura frequency. Iyo yakazara bandwidth inomiririrwa maererano neiyo yepamusoro modulating frequency uye yakaenzana nekaviri iyi frequency.
Modulation Index (m)
Huyero pakati pekuchinja kweamplitude ye carrier wave kune amplitude yeyakajairika carrier wave inonzi modulation index. Inomiririrwa nebhii ‗m'.
Iyo inogona zvakare kutsanangurwa senge renji umo iyo amplitude yemutakuri wave inosiyana neiyo modulating chiratidzo. m = Vm/Vc.
Mazana ekuchinja, %m = m*100 = Vm/Vc *100
Iyo percentage modulation iri pakati pe0 ne80%.
Imwe nzira yekuratidza iyo modulation index iri maererano nehupamhi uye hudiki hunokosha hweamplitude yemodulated carrier wave. Izvi zvinoratidzwa mumufananidzo uri pasi apa.
2 Vin = Vmax - Vmin
Vin = (Vmax – Vmin)/2
Vc = Vmax – Vin
= Vmax – (Vmax-Vmin)/2 =(Vmax + Vmin)/2
Kutsiva kukosha kweVm neVc muequation m = Vm/Vc, tinowana
M = Vmax – Vmin/Vmax + Vmin
Sezvambotaurwa, kukosha kwe ‗m' kuri pakati pe0 ne0.8. Kukosha kwem kunotarisa simba uye kunaka kwechiratidzo chinotapurirwa. Mune AM wave, chiratidzo chirimo mukusiyana kweanotakura amplitude. Iyo odhiyo chiratidzo chinofambiswa ichave isina kusimba kana inotakura wave ichingogadziriswa kusvika padiki dhigirii. Asi kana kukosha kwem kuchipfuura kubatana, iyo transmitter inoburitsa inoburitsa kukanganisa kunokanganisa.
Simba Relations mune AM wave
A modulated wave ine simba rakawanda kupfuura raive necarrier wave isati yachinja. Iwo akazara masimba emagetsi muamplitude modulation anogona kunyorwa se:
Ptotal = Pcarrier + PLSB + PUSB
Tichifunga nezvekuwedzera kuramba senge antenna kuramba R.
Pcarrier = [(Vc/√2)/R]2 = V2C/2R
Rimwe nerimwe bhendi redivi rine kukosha kwem/2 Vc uye rms kukosha kwemVc/2√2. Saka simba muLSB uye USB rinogona kunyorwa se
PLSB = PUSB = (mVc/2√2) 2/R = m2/4*V2C/2R = m2/4 Pcarrier
Ptotal = V2C/2R + [m2/4*V2C/2R] + [m2/4*V2C/2R] = V2C/2R (1 + m2/2) = Pcarrier (1 + m2/2)
Mune mamwe maapplication, mutakuri anogadziriswa panguva imwe chete neanoverengeka sinusoidal modulating masaini. Muchiitiko chakadaro, iyo yakazara modulation index inopiwa se
Mt = √(m12 + m22 + m32 + m42 + .....
Kana Ic uye Iwo ari iwo ma rms eiyo unmodulated ikozvino uye yakazara modulated ikozvino uye R ndiko kupikisa uko aya anoyerera anoyerera, ipapo.
Ptotal/Pcarrier = (It.R/Ic.R)2 = (It/Ic)2
Ptotal/Mutakuri = (1 + m2/2)
It/Ic = 1 + m2/2
- Amplitude Modulation (AM) FAQ
-
1. Define modulation?
Modulation inzira iyo mamwe maitiro eiyo yakakwirira frequency inotakura chiratidzo inosiyana zvichienderana nekukosha kwepakarepo kweiyo modulating chiratidzo.
2. Ndeapi marudzi eanalogi modulation?
Amplitude modulation.
Angle Modulation
Frequency vachisiyanisa inzwi
Phase modulation.
3. Tsanangura kudzika kwemodulation.
Inotsanangurwa sereshiyo pakati pemeseji amplitude kune iyo yekutakura amplitude. m=Em/Mup
4. Ndeapi madhigirii ekusiyanisa inzwi?
Under modulation. m <1
Yakakosha modulation m=1
Kupfuura modulation m>1
5. Chii chinodiwa pakusiyanisa inzwi?
- Zvinodiwa pakugadzirisa:
- Kureruka kwekutapurirana
- Zvakawanda
- Ruzha rwakaderedzwa
- Narrow bandwidth
- Frequency assignment
- Deredza miganhu yemidziyo
6. Ndedzipi mhando dze AM modulators?
Kune marudzi maviri e AM modulators. Vari
- Linear modulators
- Non-linear modulators
Linear modulators akaiswa sezvinotevera
- Transistor modulator
Kune matatu marudzi e transistor modulator.
- Muunganidzi modulator
- Emitter modulator
- Base modulator
- Kuchinja modulators
Non-linear modulators akaiswa sezvinotevera
- Square mutemo modulator
- Product modulator
- Yakadzikama modulator
7. Ndeupi musiyano uripo pakati peyero yepamusoro uye yakaderera mwero modulation?
Mune yakakwirira level modulation, iyo modulator amplifier inoshanda pamazinga emagetsi epamusoro uye inopa simba zvakananga kune antenna. Mune yakaderera level modulation, iyo modulator amplifier inoita modulation pane yakaderera simba mazinga. Iyo modulated siginecha inozokwidziridzwa kusvika yakakwira simba nhanho nekirasi B simba amplifier. Iyo amplifier inopa simba kune antenna.
8. Define Detection (kana) Demodulation.
Detection ndiyo maitiro ekubvisa modulating siginecha kubva kune modulated inotakura. Mhando dzakasiyana dzema detectors anoshandiswa pamhando dzakasiyana dzemodulation.
9. Tsanangura Amplitude Modulation.
Mune amplitude modulation, iyo amplitude yechiratidzo chekutakura inosiyana zvichienderana nekusiyana kweamplitude yemodulating chiratidzo.
Chiratidzo che AM chinogona kumiririrwa nemasvomhu se, eAM = (Ec + Em sinωmt ) sinωct uye modulation index inopiwa se,m = Em/EC (kana) Vm/Vc.
10. Chii chinonzi Super Heterodyne Receiver?
Iyo yepamusoro heterodyne inogamuchira inoshandura ese anouya RF ma frequency kune yakagadziriswa yakaderera frequency, inonzi yepakati frequency (IF). Iyi IF inobva yaita amplitude uye yaonekwa kuti iwane chiratidzo chepakutanga.
11. Chii chinonzi single toni uye multi toni modulation?
- Kana modulation ichiitirwa meseji siginecha ine inodarika imwe frequency chikamu saka modulation inodaidzwa kuti multi tone modulation.
- Kana modulation ichiitirwa meseji siginecha ine imwe frequency chikamu saka modulation inodaidzwa kuti single toni modulation.
12. Enzanisa AM neDSB-SC uye SSB-SC.
S.No
AM chiratidzo
DSB-SC
SSB-SC
1
Bandwidth 2fm
Bandwidth 2fm
Bandwidth fm
2
Ine USB, LSB, Mutakuri
Ine USB.LSB
USB.LSB
3
Rakawanda Simba rinodiwa pakufambisa
Simba rinodiwa ishoma pane reAM
Simba rinodiwa ishoma pane AM & DSB-SC
13. Ndezvipi zvakanakira VSB-AM?
-Iyo ine bandwidth yakakura kupfuura SSB asi yakaderera pane DSB system.
-Simba rekufambisa rakakura kupfuura DSB asi rakaderera pane SSB system.
- Hapana yakaderera frequency chikamu chakarasika. Saka inodzivirira kukanganiswa kwechikamu.
14. Iwe uchagadzira sei DSBSC-AM?
Pane nzira mbiri dzekugadzira DSBSC-AM senge
- Yakaenzana modulator
- Mhete modulators.
15. Ndezvipi zvakanakira ring modulator?
- Kubuda kwayo kwakagadzikana.
-Hazvidi simba rekunze sosi kuti riite ma diode. c).Panenge pasina kuchengetedza.
- Hupenyu hurefu.
16. Tsanangura Demodulation.
Demodulation kana kuona ndiyo nzira iyo modulating voltage inodzoserwa kubva kune yakagadziridzwa chiratidzo. Iri reverse process ye modulation. Midziyo inoshandiswa kudhiza kana kuona inonzi demodulators kana ma detectors. Kune amplitude modulation, ma detectors kana demodulators akaiswa mumapoka se:
- Square-mutemo detectors
- Envelope detectors
17. Tsanangura Multiplexing.
Multiplexing inotsanangurwa senzira yekufambisa akati wandei masaini masaini Panguva imwe chete pamusoro pechiteshi chimwe chete.
18. Tsanangura Frequency Division Multiplexing.
Frequency division multiplexing inotsanangurwa sezvikwangwani zvakawanda zvinofambiswa panguva imwe chete nechiratidzo chega chega chinogara chakasiyana frequency slot mukati meyakajairika bandwidth.
19. Tsanangura Guard Band.
Guard Mabhendi anounzwa muchikamu cheFDM kuitira kudzivirira chero kukanganisa pakati pematanho ari padyo. Kupamhama mabhande evarindi, Diki kupindira.
20. Tsanangura SSB-SC.
- SSB-SC inomirira Single Side Band Suppressed Carrier
- Kana bhendi rimwe chete richifambiswa, modulation inodaidzwa seSingle side band modulation. Inonzi zvakare seSSB kana SSB-SC.
21. Tsanangura DSB-SC.
Mushure mekugadzirisa, maitiro ekufambisa mabhandi epadivi (USB, LSB) ega uye kudzvanyirira mutakuri anodaidzwa seDouble Side Band-Suppressed Carrier.
22. Ndezvipi zvakaipira DSB-FC?
-Kuparara kwesimba kunoitika muDSB-FC
- DSB-FC ndeye bandwidth isingashande system.
23. Define Coherent Detection.
Munguva yeDemodulation mutakuri anonyatso kuwirirana kana kuwiriraniswa mune zvese frequency uye chikamu, neiyo yekutanga inotakura wave inoshandiswa kugadzira iyo DSB-SC wave.
Iyi nzira yekuona inodaidzwa sekuonekwa kwakabatana kana kuona kwakafanana.
24. Chii chinonzi Vestigial Side Band Modulation?
Vestigial Sideband Modulation inotsanangurwa semodulation umo imwe yedivi bhendi inodzvinyirirwa zvishoma uye chisaririra cherimwe bhendi repadivi chinofambiswa kutsiva kudzvinyirirwa ikoko.
25. Ndezvipi zvakanakira chiratidzo sideband kutapurirana?
- Simba rekushandisa
- Bandwidth kuchengetedza
- Kuderedza ruzha
26. Ndezvipi zvazvakaipira zve single side band transmission?
- Complex vanogamuchira: Single side bhendi masisitimu inoda zvakanyanya kuomarara uye zvinodhura zvinogamuchira thn conventiaonal AM kutapurirana.
- Tuning matambudziko: Single side bhendi inogamuchira inoda yakanyanya kuoma uye chaiyo tunig pane yakajairwa AM inogamuchira.
27. Enzanisa mutsara uye isiri-mutsara modulators?
Linear Modulators
- Heavy kusefa hakudiwi.
- Aya ma modulators anoshandiswa mune yakakwira level modulation.
- Iyo inotakura voltage yakakura kwazvo kupfuura modulating signal voltage.
Kwete Linear Modulators
- Kusefa kwakanyanya kunodiwa.
- Aya ma modulators anoshandiswa mune yakaderera level modulation.
- Iyo modulating chiratidzo voltage yakakura kwazvo kupfuura inotakura chiratidzo voltage.
28. Chii chinonzi frequency kududzira?
Ngatitii chiratidzo bhendi rinogumira kune frequency renji inotambanukira kubva paf1 kuenda kune frequency f2. Maitiro ekushandura ma frequency nderimwe umo chiratidzo chepakutanga chinotsiviwa nechiratidzo chitsva chine spectral renji rinobva paf1' uye f2' uye iyo chiratidzo chitsva chinotakura, muchimiro chinodzoreredza ruzivo rwakafanana nerwakatakurwa nechiratidzo chepakutanga.
29. Ndeapi ari migariro miviri inoratidzirwa mushanduro dzakawanda?
- Up Shanduko: Muchiitiko ichi iyo yakashandurwa mutakuri frequency yakakura kupfuura inouya inotakura
- Down Conversion: Muchiitiko ichi iyo yakashandurwa inotakura frequency idiki pane inowedzera mutakuri frequency.
Nekudaro, yakamanikana FM chiratidzo inoda zvakangofanana kufambisa bandwidth sechiratidzo che AM.
30. Chii chinonzi BW yeAM wave?
Musiyano uripo pakati peaya maviri akanyanya ma frequency akaenzana nebandwidth ye AM wave.
Naizvozvo, Bandwidth, B = (fc + fm) - (fc - fm) B = 2fm
31. Chii chinonzi BW yeDSB-SC chiratidzo?
Bandwidth, B = (fc + fm) - (fc - fm) B = 2f
Zviripachena kuti bandwidth yeDSB-SC modulation yakafanana neyakajairika AM mafungu.
32. Ndedzipi nzira dzekuburitsa masaini eDSB-SC?
Iyo DSB-SC chiratidzo inogona kuderedzwa nekutevera nzira mbiri:
- Synchronous yekuona nzira.
-Kushandisa envelopu detector mushure mekutakurazve mutakuri.
33. Nyora mashandisirwo eHilbert shanduko?
-Kugadzira masaini eSSB,
-Kugadzira ediki chikamu mhando mafirita,
- Nekumiririra kwebhendi pass masaini.
34. Ndedzipi nzira dzekugadzira SSB-SC chiratidzo?
SSB-SC masaini anogona kugadzirwa nenzira mbiri sepazasi:
-Kakawanda kusarura nzira kana nzira yekusefa.
-Pase kusarura nzira kana phase-shift nzira.
MASHOKO ERUGWARO
1. Amplitude modulation: Iyo modulation yemafungu nekusiyanisa makuriro ayo, inoshandiswa kunyanya senzira yekutepfenyura chiratidzo chekuteerera nekuchisanganisa neredhiyo inotakura wave.
2. Iyo modulation index: (kudzika kwemodulation) yechirongwa chemodulation inotsanangura nekuwanda kweiyo modulated shanduko yechiratidzo chekutakura inosiyana padanho rayo risina kurongeka.
3. Narrowband FM: Kana iyo modulation index yeFM ikachengetwa pasi pe1, saka iyo FM inogadzirwa inoonekwa seyakamanikana bhendi FM.
4. Frequency modulation (FM): iyo encoding yeruzivo mune inotakura wave nekusiyanisa iyo pakarepo frequency yemafungu.
5. Amplication: Iyo nhanho yakanyatsosarudzwa kuitira kuti isaremedze musanganisi kana masaini akasimba aripo, asi anogonesa masaini kuti akudzwe zvakakwana kuti ave nechokwadi chekuti chiratidzo chakanaka kune ruzha chiyero chinowanikwa.
6. Modulation: Maitiro ayo mamwe maitiro emutakuri wave anosiyana-siyana zvichienderana nechiratidzo chemharidzo.
- Ndeupi musiyano uripo pakati peSW, MW neFM radio?
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Pfupi (SW)
Shortwave radio ine hukuru hukuru - inogona kugamuchirwa zviuru zvemamaira kubva kune inofambisa, uye kutapurirana kunogona kuyambuka makungwa nemakomo. Izvi zvinoita kuti ive yakanakira kusvika kunyika dzisina nhepfenyuro yeredhiyo kana uko kutepfenyura kwechiKristu kunorambidzwa. Zvichitaurwa zviri nyore, redhiyo yeshortwave inokunda miganhu, ingave yenzvimbo kana yezvematongerwo enyika. SW transmissions iri nyore kugamuchira, zvakare: kunyange yakachipa, maredhiyo ari nyore anokwanisa kutora chiratidzo.
Masimba eshortwave redhiyo anoita kuti inyatsokodzera Feba's key tarisiro nzvimbo ye Kutambudzwa Church. Semuyenzaniso, munzvimbo dzekuNorth East Africa uko kutepfenyura kwechitendero kwakarambidzwa mukati menyika, vatinoshanda navo veko vanogona kugadzira zvinyorwa zvekuteerera, vozvitumira kunze kwenyika uye voita kuti zvivhenekerwe kuburikidza nekufambiswa kweSW pasina njodzi yekupomerwa.
Yemen parizvino iri kusangana nedambudziko rakakura uye rine chisimba nekukonana kuchikonzera dambudziko guru rekubatsira vanhu. Zvakare nekupa kurudziro pamweya, vatinoshanda navo vanotepfenyura zvinhu zvinogadzirisa zvazvino zvemagariro, hutano uye hutano kubva pamaonero echiKristu.
Munyika umo maKristu anongoita 0.08% yehuwandu uye vanosangana nekutambudzwa nekuda kwekutenda kwavo, Chokwadi Church ivhiki nevhiki 30 maminetsi shortwave radio inotsigira vatendi veYemeni mumutauro weko. Vateereri vanokwanisa kuwana nhepfenyuro dzeredhiyo dzinotsigira vari pachivande uye vasingazivikanwe.
Nzira ine simba yekusvika nharaunda dzakasarirwa nemhiri kwemiganhu, shortwave inoshanda zvikuru pakusvika kune vanhu vari kure neEvhangeri uye, munzvimbo dzinotambudzwa vaKristu, inosiya vateereri nevatepfenyuri vakasununguka kubva pakutya kutsiviwa.
Medium-wave (MW)
Radhiyo yepakati-wave inowanzo shandiswa kutepfenyura munharaunda uye yakanakira nharaunda dzekumaruwa. Iine svikiro rekutapurirana renji, rinogona kusvika kunzvimbo dziri kure nechiratidzo chakasimba, chakavimbika. Medium-wave transmissions inogona kutepfenyurwa kuburikidza nemaredhiyo akasimbiswa - uko kune network.
In kuchamhembe kweIndia, zvitendero zvetsika zvomunzvimbomo zvinosiya vakadzi vari kurerutswa uye vakawanda vanovharirwa mudzimba dzavo. Kuvakadzi vari pachinzvimbo ichi, kutapurirana kubva kuFeba North India (kuchishandisa nhepfenyuro yakasimbiswa) inzira yakakosha nenyika dzekunze. Hurongwa hwayo hunoenderana nehunhu hunopa dzidzo, nhungamiro yezveutano uye ruzivo nezvekodzero dzevakadzi, zvichikurudzira nhaurirano pamusoro pezvemweya nevakadzi vanobata nhepfenyuro. Mumamiriro ezvinhu aya, redhiyo iri kuunza shoko retariro nekusimudzira kumadzimai anoteerera kumba.
Frequency Modulation (FM)
Kune nhepfenyuro yakavakirwa munharaunda, FM ndimambo!
Radio Umoja FM kuDRC kwakatangwa nguva pfupi yadarika, nechinangwa chekupa nharaunda inzwi. FM inopa ipfupi-renji chiratidzo - kazhinji kune chero kupi mukati mekuona kweanotapurirana, ine yakanakisa ruzha mhando. Inogona kuvhara nzvimbo yeguta diki kana guta hombe - ichiita kuti ive yakanakira nhepfenyuro inotarisana nenzvimbo yakaganhurwa inotaura nezvenyaya dzenzvimbo. Kunyange zviteshi zveshortwave uye zvepakati-wave zvinogona kudhura kushanda, rezinesi renharaunda-yakavakirwa FM chiteshi rakachipa zvakanyanya.
Afno FM, mubatsiri waFeba wekuNepal, anopa mazano akakosha ezveutano kunharaunda dzemuOkhaldhunga neDadeldhura. Kushandisa FM kunovabvumira kuisa ruzivo rwakakosha, zvakajeka, kunzvimbo dzakanangwa. Kumaruwa eNepal, kune kufungirana kwakapararira kwezvipatara uye mamwe mamiriro ekurapa akajairika anoonekwa seanorambidzwa. Pane kudiwa chaiko kwemazano ehutano ane ruzivo rwakakwana, asina-kutonga uye Afno FM inobatsira kuzadzisa chinodiwa ichi. Chikwata chinoshanda pamwe chete nezvipatara zvemuno kudzivirira nekurapa matambudziko akajairika ehutano (kunyanya avo vane rusarura rwakanangana navo) uye kugadzirisa kutya kwevanhu veko kwevashandi vehutano, kukurudzira vateereri kutsvaga kurapwa kuchipatara pavanenge vachida. FM inoshandiswawo muredhiyo dambudziko rinopindura - ine 20kg FM transmitter ichireruka zvakakwana kutakura kuenda kunharaunda dzakawirwa nenjodzi sechikamu che nyore kutakura sutukesi studio.
Internet Radio
Iko kukurumidza kusimudzira kwewebhu-based tekinoroji inopa mikana mikuru yekutepfenyura redhiyo. Zviteshi zveInternet zvinokurumidza uye zviri nyore kuseta (dzimwe nguva zvinotora zvishoma sesvondo kuti usimuke uye ushande! Inogona kudhura zvishoma pane yenguva dzose kutumira.
Uye nekuti iyo internet haina miganhu, webhu-based radio vateereri vanogona kusvika pasi rose. Chimwe chinokanganisa ndechekuti redhiyo yeInternet inotsamira pakuburitswa kweInternet uye kuwana kwemuteereri pakombiyuta kana smartphone.
Munhamba yevanhu pasi rose inosvika mabhiriyoni 7.2, zvikamu zvitatu nezvishanu, kana kuti mabhiriyoni 4.2, havasati vava kuwana Indaneti nguva dzose. Mapurojekiti eredhiyo eredhiyo epaInternet parizvino haana kukodzera kune dzimwe nzvimbo dzevarombo uye dzisingasvikike pasi rose.
- Chii chinonzi SW uye MW?
- Iri zita rekuti "shortwave" rakatanga panguva yekutanga kweredhiyo mukutanga kwezana ramakore rechi20, apo radio spectrum yakakamurwa kuita refu wave (LW), medium wave (MW), uye mapfupi wave (SW) mabhendi zvichienderana nehurefu hwesaisai. .
- AM neMW zvakafanana here?
- AM, inomirira Amplitude Modulation (AM) ndiyo yekare nhepfenyuro yeredhiyo muUK. Izwi rekuti AM rinowanzo shandiswa kuvhara ese ari maviri Medium Wave (MW) uye Long Wave (LW).
- Ndeupi musiyano uripo pakati peshortwave ne medium wave?
- Nekuratidzwa kumwe chete kana kupfuura pakati pepasi neinosphere, chiratidzo cheredhiyo chipfupi-wave chinogona kugashirwa kure kure kubva kune chinofambisa. Uye yepakati wave kana mediumwave (MW) chikamu cheMedium frequency (MF) redhiyo bhendi rinoshandiswa kutepfenyura AM.
- Iyo AM radio shortwave?
- Inonzi shortwave nekuti, chaizvo chaizvo, masaisai anoburitswa mapfupi kupesana neakareba wave uye epakati wave, anoshandiswa neAM radio, uye wideband VHF (yakanyanya high frequency) inoshandiswa neFM radio. Aya masaisai mapfupi anogona kufamba zviuru zvemamaira kutenderera pasirese, saka redhiyo yeshortwave, nemasikirwo, ndeyepasirese.
- Redhiyo ye AM yakafanana neyepakati wave?
- Medium wave (MW) masaini anofambiswa achishandisa amplitude modulation (AM) uye mazwi anoshandiswa zvakasiyana. Masiginecha eFM anonyanya kufambiswa muiyo yakakwira frequency (VHF) kana Ultra high frequency (UHF) mabhendi uye anoshandiswa kunzwi (redhiyo) pamwe nevhidhiyo (TV) kutepfenyura.
- Chii chinonzi frequency range ye AM?
- Iyo AM bhendi muUnited States inovhara mafambiro kubva pa540 kHz kusvika 1700 kHz, mumatanho gumi kHz (10, 540, 550 ... 560, 1680, 1690). 1700 kHz muUnited States haisi kuwanikwa kuti ishandiswe kutepfenyura, asi yakachengeterwa kushandiswa kwemagetsi mashoma kwazvo eVafambi' Information Station.
- Nei redhiyo ye AM ichiri kushandiswa?
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Amplitude modulation (AM) ndiyo nzira yekare kwazvo yekushandura inozivikanwa. Nhepfenyuro dzekutanga dzaive AM, asi kunyangwe kare, CW kana masaini anoenderera neMorse kodhi yaive fomu ye AM. Ndidzo dzatinodaidza kuti on-off keying (OOK) kana amplitude-shift keying (ASK) nhasi.
Kunyangwe AM iri yekutanga uye yekare, ichiri kutenderera mune akawanda mafomu kupfuura zvaungafunga. AM iri nyore, yakaderera mutengo, uye inoshanda zvinoshamisa. Kunyangwe kudiwa kwedata rekumhanya-mhanya kwatitungamira takananga ku orthogonal frequency-division multiplexing (OFDM) seyakanyanya kunyatso shanda modulation scheme, AM ichiri kubatanidzwa muchimiro chequadrature amplitude modulation (QAM).
Chii chakaita kuti ndifunge nezve AM? Mukati medutu guru rechando remwedzi miviri kana kupfuura yapfuura, ndakawana yakawanda yemamiriro angu ekunze uye ruzivo rwechimbichimbi kubva kunhepfenyuro dze AM. Kunyanya kubva kuWOAI, iyo 50-kW chiteshi chave chiripo kwemakore. Ini ndinokahadzika kuti vaive vachiri kuburitsa 50 kW panguva yekudzima kwemagetsi, asi vaive mumhepo panguva yese yemamiriro ekunze. Mazhinji kana asiri mazhinji AM zviteshi zvaive kumusoro uye zvichimhanya pamagetsi ekuchengetedza. Akavimbika uye anonyaradza.
Kune anopfuura zviuru zvitanhatu zve AM zviteshi muUS nhasi. Uye vachiri nevateereri vakakura vevateereri, kazhinji vagari venzvimbo vanotsvaga mamiriro ekunze, traffic, uye ruzivo rwenhau. Vazhinji vachiri kuteerera mumotokari dzavo kana marori. Kune akasiyana siyana ehurukuro redhiyo anoratidza uye iwe uchiri kukwanisa kunzwa baseball kana nhabvu mutambo paAM. Sarudzo dzemimhanzi dzadzikira, sezvo vanga vachinyanya kuenda kuFM. Asi, kune dzimwe nyika uye Tejano mimhanzi zviteshi pa AM. Zvose zvinoenderana nevateereri veko, izvo zvakasiyana-siyana.
AM redhiyo inotepfenyura mu10-kHz yakafara chiteshi pakati pe530 ne1710 kHz. Zvese zviteshi zvinoshandisa shongwe, saka polarization yakamira. Mukati mezuva, kuparadzira kunonyanya kuita mafungu epasi ane huwandu hwemakiromita zana. Kune chikamu chikuru, zvinoenderana nehuwandu hwesimba, kazhinji 100 kW kana 5 kW. Kwete zviteshi zve1-kW zvakawanda zviripo, asi huwandu hwazvo huri pachena huri kure.
Husiku, hongu, kushambadza kunoshanduka sezvo ionized layers inoshanduka uye inoita kuti masaini afambe kuenda kure nekuda kwekugona kwawo kudzokororwa neayoni epamusoro dhizaini kugadzira akawanda masign hop ari madaro kusvika churu mamaira kana kupfuura. Kana iwe uine yakanaka AM redhiyo uye antenna refu iwe unogona kuteerera kune zviteshi munyika yese husiku.
AM zvakare ndiyo huru modulation yeshort-wave radio, yaunogona kunzwa pasi rese kubva pa5 kusvika 30 MHz. Ichiri imwe yenzvimbo huru dzeruzivo kune dzakawanda nyika dzechitatu. Kuteerera kwenguva pfupi-wave zvakare kunoramba kuri chinhu chakakurumbira.
Kunze kwekutepfenyura, AM ichiri kushandiswa kupi? Ham radio ichiri kushandisa AM; kwete mune yepakutanga yepamusoro-level fomu, asi seimwe sideband (SSB). SSB iAM ine mutakuri akadzvinyirirwa uye rimwe bhendi repadivi rakasefa, richisiya nhete 2,800-Hz chiteshi chezwi. Inoshandiswa zvakanyanya uye inoshanda zvakanyanya, kunyanya mumabhendi eham kubva pa3 kusvika ku30 MHz. Mauto uye mamwe maredhiyo emugungwa anoramba achishandisa imwe nzira yeSSB, zvakare.
Asi mira, handizvo zvoga. AM ichiri kuwanikwa mumaredhiyo eCitizen's Band. Plain-yekare AM inoramba iri mumusanganiswa, sezvinoita SSB. Zvakare, AM ndiyo huru modulation yeredhiyo yendege inoshandiswa pakati pendege neshongwe. Aya maredhiyo anoshanda mu118- kusvika 135-MHz bhendi. Sei AM? Handisati ndambozvifunga, asi zvinoshanda zvakanaka.
Chekupedzisira, AM ichiri nesu muQAM fomu, musanganiswa wechikamu uye amplitude modulation. Mazhinji chiteshi cheOFDM anoshandisa imwe fomu yeQAM kuwana iwo epamusoro data mareti avanokwanisa kuendesa.
Zvakadaro, AM haisati yafa, uye kutaura zvazviri zvinoita kunge Kuchembera Hukuru.
- Chii chinonzi AM Transmitter uye Inoshanda Sei?
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Chii chinonzi AM Transmitter?
Matransmitter anofambisa masaini masaini anozivikanwa se AM transmitters, anozivikanwa zvakare se AM radio transmitter kana AM nhepfenyuro transmitter, nekuti anoshandiswa kutamisa masaini eredhiyo kubva kune rimwe divi kuenda kune rimwe.
Aya ma transmitters anoshandiswa mune yepakati wave (MW) uye mapfupi wave (SW) frequency mabhendi ekutepfenyura kwe AM.
bhendi reMW rine mafrequency ari pakati pe550 KHz ne1650 KHz, uye bhendi reSW rine mafrequency anotangira pa3 MHz kusvika pa30 MHz. Iwo marudzi maviri e AM transmitters anoshandiswa zvichibva pamasimba avo ekufambisa ndeaya:
- Chikamu chepamusoro
- Chikamu Chakaderera
High level transmitters anoshandisa yakakwirira level modulation, uye yakaderera level transmitters anoshandisa yakaderera level modulation. Sarudzo pakati peaya maviri modulation zvirongwa zvinoenderana nesimba rekutumira re AM transmitter.
Mumatapfenyuro enhepfenyuro, uko simba rekutumira rinogona kunge riri reiyo kilowatts, yakakwirira level modulation inoshandiswa. Mune yakaderera magetsi transmitters, uko chete mashoma watts ekufambisa simba anodiwa, yakaderera level modulation inoshandiswa..
High-Level Uye Yakaderera-Level Transmitters
Pazasi nhamba inoratidza iyo block dhizaini yeakakwira-level uye yakaderera-level transmitters. Musiyano wekutanga pakati peaya maviri transmitters isimba rekusimudzira remutakuri uye modulating masaini.
Mufananidzo (a) unoratidza dhiyabhorosi dhizaini repamusoro-level AM transmitter.
Mufananidzo (a) wakadhirowewa kuitira kutapurirana odhiyo. Mukufambiswa kwepamusoro-soro, masimba emutakuri uye modulating masaini anokwidziridzwa asati aaisa kune iyo modulator nhanho, sezvakaratidzwa mumufananidzo (a). Mune yakaderera-level modulation, masimba e maviri ekuisa masaini eiyo modulator nhanho haana kukwidziridzwa. Iyo inodiwa yekufambisa simba inowanikwa kubva padanho rekupedzisira reiyo transmitter, iyo kirasi C simba amplifier.
Zvikamu zvakasiyana-siyana zvemufananidzo (a) ndezvi:
- Mutakuri oscillator
- Buffer amplifier
- Kakawanda kuwedzera
- Simba amplifier
- Audio cheni
- Modulated kirasi C simba amplifier
Mutakuri Oscillator
Iyo inotakura oscillator inogadzira chiratidzo chekutakura, icho chiri muRF renji. Kuwanda kwemutakuri nguva dzose kwakanyanyisa. Nekuti zvakanyanya kuoma kuburitsa yakakwira ma frequency ane yakanaka frequency kugadzikana, inotakura oscillator inogadzira sub yakawanda ine inodiwa inotakura frequency.
Iyi sub-multiple frequency inowedzerwa neiyo frequency multiplier nhanho kuti uwane inodiwa inotakura frequency.
Kupfuurirazve, crystal oscillator inogona kushandiswa mune ino nhanho kugadzira yakaderera frequency inotakura ine yakanakisa frequency kugadzikana. Iyo frequency multiplier nhanho inozowedzera kuwanda kwemutakuri kune kukosha kwayo kunodiwa.
Buffer Amplifier
Chinangwa chebuffer amplifier chakapetwa kaviri. Iyo inotanga kuenderana nekubuda kweiyo impedance yeanotakura oscillator neiyo impedance yekupinza yeiyo frequency multiplier, nhanho inotevera yeanotakura oscillator. Iyo inobva yaparadzanisa inotakura oscillator uye frequency multiplier.
Izvi zvinodikanwa kuitira kuti iyo yakawanda irege kutora yakakura ikozvino kubva kune inotakura oscillator. Kana izvi zvikaitika, kuwanda kweiyo carrier oscillator haizorambi yakagadzikana.
Frequency Multiplier
Iyo sub-multiple frequency yechiratidzo chekutakura, inogadzirwa nemutakuri oscillator, ikozvino inoshandiswa kune frequency multiplier kuburikidza nebuffer amplifier. Iyi nhanho inozivikanwawo se harmonic jenareta. Iyo frequency multiplier inogadzira yakakwira maharmonics emutakuri oscillator frequency. Iyo frequency multiplier idunhu rakamisikidzwa rinogona kumisikidzwa kune inodiwa inotakura frequency iyo inofanirwa kutapurirana.
Power Amplifier
Simba rechiratidzo chekutakura rinobva rawedzerwa muchikamu chemagetsi amplifier. Ichi ndicho chinodiwa chakakosha chepamusoro-level transmitter. Kirasi C simba amplifier inopa yakakwira simba ikozvino pulses yechiratidzo chekutakura pakubuda kwayo.
Sravana Sameeralu Serial XNUMXth Audio Chain
Chiratidzo chekuteerera chinotapurwa chinowanikwa kubva kumakrofoni, sezvakaratidzwa mumufananidzo (a). Iyo yekuteerera mutyairi amplifier inokwidziridza voltage yechiratidzo ichi. Uku kukwidziridzwa kunodiwa kutyaira iyo odhiyo simba amplifier. Tevere, kirasi A kana kirasi B simba amplifier inokudza simba reiyo odhiyo chiratidzo.
Modulated Kirasi C Amplifier
Iyi ndiyo nhanho yekubuda kweiyo transmitter. Iyo modulating odhiyo siginecha uye inotakura chiratidzo, mushure mekusimudzira simba, inoiswa kune ino modulating nhanho. Iko modulation inoitika panguva ino. Iyo kirasi C amplifier inokwidziridzawo simba reiyo AM siginecha kune inodzokororwa yekufambisa simba. Ichi chiratidzo chinopedzisira chapfuudzwa kune antenna., iyo inopenya chiratidzo munzvimbo yekutapurirana.
Iyo yakaderera-level AM transmitter inoratidzwa mumufananidzo (b) yakafanana neyepamusoro-level transmitter, kunze kwekuti masimba emutakuri uye masaini masaini haana kukwidziridzwa. Aya masaini maviri anoshandiswa zvakananga kune modulated kirasi C simba amplifier.
Modulation inoitika pachikuva, uye simba reiyo modulated siginecha inokwidziridzwa kune inodiwa yekufambisa simba nhanho. Iyo antenna inotumira inobva yatumira chiratidzo.
Kubatanidzwa kweKubuda Danho uye Antenna
Iyo yekubuda nhanho yeiyo modulated kirasi C simba amplifier inodyisa chiratidzo kune inotumira antenna.
Kuti utumire yakanyanya simba kubva padanho rekubuda kuenda kune antenna zvinodikanwa kuti iyo impedance yezvikamu zviviri izvi ifanane. Kune izvi, network inoenderana inodiwa.
Kufananidza pakati pezviviri izvi kunofanirwa kuve kwakakwana pane zvese zvinotapurira ma frequency. Sezvo kufananidzwa kuchidiwa pama frequency akasiyana, inductors uye capacitor inopa impedance dzakasiyana pama frequency akasiyana anoshandiswa mumatiweki anoenderana.
Iyo yekufananidza network inofanirwa kugadzirwa uchishandisa izvi zvingori zvikamu. Izvi zvinoratidzwa pazasi Mufananidzo (c).
Iyo inofananidzira network inoshandiswa kubatanidza iyo inobuda nhanho yeanotumira uye antenna inonzi kaviri π-network.
Iyi network inoratidzwa pamufananidzo (c). Iyo ine maviri inductors, L1 uye L2 uye maviri capacitor, C1 uye C2. Hukoshi hwezvinhu izvi zvinosarudzwa zvekuti iyo impedance yekupinza yetiweki pakati pe1 ne1'. Inoratidzwa mumufananidzo (c) inofananidzwa neinobuda impedance yedanho rekubuda reiyo transmitter.
Kupfuurirazve, iyo yakabuda impedance yetiweki inofananidzwa neiyo impedance yeantenna.
Iyo yakapetwa kaviri π inofananidzira network inosefa zvisingadiwe frequency zvikamu zvinoonekwa pakubuda kwechikamu chekupedzisira cheiyo transmitter.
Kubuda kweiyo modulated kirasi C simba amplifier inogona kunge iine yakakwirira harmonics, seyechipiri neyechitatu harmonics, izvo zvisingadiwe zvakanyanya.
Iyo frequency mhinduro yetiweki inofananidzwa inoiswa zvekuti aya asingadiwe epamusoro maharmonics anotsikirirwa, uye chete chiratidzo chinodiwa chinosanganiswa kune antenna..
- AM kana FM Transmitter? Misiyano Yakakosha
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Iyo kanyanga iripo panoperera chikamu chekutumira, inoendesa modulated wave. Muchitsauko chino, ngatikurukurei nezve AM uye FM nhepfenyuro.
AM Rinofambisa
AM anotepfenyurisa anotora odhiyo chiratidzo seyakapinza uye anonunura amplitude modulated wave kune kanyanga sechinhu chinobuda kuti chiendeswe. Iyo block block ye AM transmitter inoratidzwa mumufananidzo unotevera.
Kushanda kwe AM transmitter kunogona kutsanangurwa sezvinotevera:
- Iyo odhiyo chiratidzo kubva pakuburitsa maikorofoni inotumirwa kune pre-gudzazwi, iyo inosimudzira danho reiyo modulating chiratidzo.
- Iyo RF oscillator inogadzira iyo inotakura chiratidzo.
- Ose modulating uye anotakura chiratidzo anotumirwa kuna AM modulator.
- Power gudzazwi inoshandiswa kuwedzera masimba mazinga e AM wave. Iyi wave inozopfuudzwa kune iyo antenna kuti ipfuudzirwe.
FM Transmitter
FM inotepfenyurisa ndicho chikamu chese, icho chinotora iyo odhiyo chiratidzo seyakapinza uye inonunura FM wave kune kanyanga sechinhu chinobuda chinofanira kutapurirwa. Iyo block block ye FM transmitter inoratidzwa mune inotevera nhamba.
Kushanda kweFM transmitter kunogona kutsanangurwa sezvinotevera:
- Iyo odhiyo chiratidzo kubva pakuburitsa maikorofoni inotumirwa kune pre-gudzazwi, iyo inosimudzira danho reiyo modulating chiratidzo.
- Iyi siginari inozopfuudzwa kune yakakwira yekupfuura firita, iyo inoshanda senge pre-yekusimbisa network kusefa kunze kweruzha uye nekuvandudza iyo chiratidzo kune ruzha reshiyo.
- Iyi chiratidzo inoenderera ichipfuura kune iyo FM modulator wedunhu.
- Iyo oscillator wedunhu inogadzira yakakwira frequency frequency inotakura, iyo inotumirwa kune modulator pamwe chete neiyo modulating chiratidzo.
- Matanho akati wandei ehuwandu hwekuwandisa anoshandiswa kuwedzera iyo yekushandisa frequency. Kunyangwe ipapo, simba rechiratidzo harina kukwana kutakura. Nekudaro, RF simba gudzazwi rinoshandiswa kumagumo kuwedzera simba rechiratidzo chakamisikidzwa. Iyi FM modulated kuburitsa inozopfuudzwa kune iyo antenna kuti ipfuudzirwe.
- AM kana FM: Maitiro ekusarudza Yakanakisa Broadcast System?
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Kuenzanisa kwe AM uye FM Zviratidzo
Ose ari maviri AM uye FM system anoshandiswa mune zvekutengesa uye zvisiri zvekutengesa zvikumbiro. Zvakadai senhepfenyuro neterevhizheni. Imwe neimwe sisitimu ine kwayo kwayo kwayo uye kwayakaipira. Mune Yakasarudzika application, AM system inogona kuve yakakodzera kupfuura yeFM system. Saka izvo zviviri zvakakosha zvakaenzana kubva pakuona kwekushandisa.
Kubatsira kweFM masisitimu pamusoro pe AM Systems
Iyo amplitude yeFM wave inoramba iripo. Izvi zvinopa vagadziri vehurongwa mukana wekubvisa ruzha kubva kune yakagamuchirwa chiratidzo. Izvi zvinoitwa muFM vanogashira nekushandisa amplitude limiter circuit kuitira kuti ruzha rwuri pamusoro pekudzikamisa amplitude rudzvinyirwe. Saka, iyo FM system inoonekwa seruzha immune system. Izvi hazvigoneke mumasisitimu eAM nekuti chiratidzo chebhendi chinotakurwa nekusiyana kweamplitude iyo pachayo uye envelopu yechiratidzo che AM haigone kuchinjwa.
- Mazhinji esimba muchiratidzo cheFM anotakurwa nemabhendi epadivi. Kune yakakwirira kukosha kweiyo modulation index, mc, chikamu chikuru chesimba rose chiri mukati mabhendi ekumativi, uye chiratidzo chekutakura chine simba shoma. Kusiyana neizvi, muhurongwa hweAM, chikamu chimwe chete muzvitatu chesimba rose chinotakurwa nemabhendi eparutivi uye zvikamu zviviri muzvitatu zvesimba rose zvinorasika muchimiro chesimba rekutakura.
- Mune FM masisitimu, simba reiyo inofambiswa chiratidzo zvinoenderana nehukuru hweiyo unmodulated inotakura chiratidzo, uye nekudaro inogara. Mukupesana, mune AM masisitimu, iro simba rinoenderana neiyo modulation index ma. Iyo yakanyanya kubvumidzwa simba muAM masisitimu i100 muzana kana ma ari kubatana. Kurambidzwa kwakadaro hakushande int kesi yeFM masisitimu. Izvi zvinodaro nekuti iyo yakazara simba muFM system yakazvimirira pane modulation index, mf uye frequency deviation fd. Naizvozvo, mashandisirwo emagetsi akanyanya muFM system.
Mune AM system, nzira chete yekudzikisa ruzha ndeyekuwedzera simba rinofambiswa rechiratidzo. Kushanda uku kunowedzera mutengo we AM system. Mune FM system, iwe unogona kuwedzera frequency kutsauka mune inotakura chiratidzo kudzikisa ruzha. kana iyo frequency kutsauka kwakakwira, ipapo iyo inowirirana mutsauko muamplitude ye baseband chiratidzo inogona kudzoserwa nyore. kana frequency kutsauka iri diki, ruzha 'runogona kuvharidzira iyi mutsauko uye frequency kutsauka haigone kushandurirwa mukuenderana kwayo amplitude musiyano. Nekudaro, nekuwedzera frequency kutsauka muiyo FM siginecha, iyo ruzha mhedzisiro yaanogona kuderedza. Iko hakuna kupihwa muAM system yekudzikisa ruzha nechero nzira, kunze kwekuwedzera simba rayo rinofambiswa.
Muchiratidzo cheFM, chiteshi cheFM chiri padyo chinoparadzaniswa nemabhendi evarindi. Mune FM system hapana chiratidzo chekufambisa kuburikidza nenzvimbo yespectrum kana bhendi revarindi. Naizvozvo, hapana kana kukanganiswa kwematanho ari padyo neFM. Nekudaro, mune AM system, hapana bhendi revarindi rakapihwa pakati pematanho maviri ari padyo. Naizvozvo, panogara paine kupindira kwe AM radio nhepfenyuro kunze kwekunge iyo inogamuchirwa siginecha yakasimba zvakakwana kudzvanya chiratidzo cheiyo chiteshi.
Izvo zvakashata zveFM masisitimu pamusoro pe AM masisitimu
Kune huwandu husingaverengeki hwemabhendi epadivi muchiratidzo cheFM uye saka iyo theoretical bandwidth yeFM system haina magumo. Iyo bandwidth yeFM system inoganhurwa nekutonga kwaCarson, asi ichiri yakakwira zvakanyanya, kunyanya muWBFM. Mune AM masisitimu, bandwidth inongopeta kaviri iyo modulation frequency, iri shoma pane iyo yeWBFN. Izvi zvinoita kuti maFM masisitimu adhure pane AM masisitimu.
Midziyo yeFM system yakaoma kupfuura AM masisitimu nekuda kwekutenderera kutenderera kweFM masisitimu; ichi ndicho chimwe chikonzero chekuti FM masisitimu anodhura AM masisitimu.
Nzvimbo inogashira yeFM system idiki pane AM system nekudaro chiteshi cheFM chinongotenderwa kunzvimbo dzemumaguta ukuwo AM radio nhepfenyuro inogona kugamuchirwa chero kupi zvako pasirese. Iyo FM system inotumira masaini kuburikidza nemutsara wekuona kupararira, umo chinhambwe chiri pakati pekutumira uye kugamuchira antenna haifanirwe kuve yakawanda. mune AM system masiginecha eshort wave bhendi zviteshi zvinofambiswa kuburikidza nemuchadenga maseru anoratidza masaisai eredhiyo pamusoro penzvimbo yakakura.
- Ndedzipi Mhando Dzakasiyana dze AM Transmitters?
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Nekuda kwekushandiswa kwakasiyana, AM Transmitter yakakamurwa zvakanyanya kuita veruzhinji AM Transmitter (DIY uye yakaderera simba AM transmitters) uye yekushambadzira AM Transmitter (yeredhiyo yemauto kana yenyika AM nhepfenyuro).
Commerce AM Transmitter ndechimwe chezvinhu zvinomiririra zvigadzirwa mumunda weRF.
Iyi mhando yeredhiyo nhepfenyuro inogona kushandisa yakakura AM nhepfenyuro antennas (guyed mast, nezvimwewo) kutepfenyura masaini pasi rose.
Nekuti AM haigone kuvharika zviri nyore, yekutengesa AM transmitter inowanzo shandiswa nhema dzezvematongerwo enyika kana mauto ehurongwa hwekunyepedzera pakati penyika.
Zvakafanana neiyo FM kutepfenyura transmitter, iyo AM nhepfenyuro inotepfenyura inogadzirwa zvakare neakasiyana magetsi kubuda.
Tichitora iyo FMUSER semuenzaniso, yavo yekutengesa AM transmitter series inosanganisira 1KW AM transmitter, 5KW AM transmitter, 10kW AM transmitter, 25kW AM transmitter, 50kW AM transmitter, 100kW AM transmitter, uye 200kW AM transmitter.
Aya ma AM transmitters anovakwa neyakagadzirwa-yakagadzirwa yakasimba state cabinet, uye ine AUI kure kudzora masisitimu uye modular zvikamu dhizaini, inotsigira inoenderera yemhando yepamusoro AM masaini kubuda.
Nekudaro, kusiyana nekugadzirwa kweredhiyo yeFM, kuvaka AM transmitter station ndeyemitengo yakakwira.
Kune vatepfenyuri, kutanga chiteshi chitsva che AM kunodhura, kusanganisira:
- Mutengo wekutenga uye kutakura kwe AM radio michina.
- Mutengo wekubhadhara vashandi uye kuisirwa kwemidziyo.
-Mutengo wekushandisa AM nhepfenyuro marezinesi.
- Nezvimwewo.
Naizvozvo, kune zviteshi zveredhiyo zvemunyika kana zvemauto mutengesi akavimbika ane mhinduro-yekumira anodiwa nekukurumidza kune inotevera AM kutepfenyura michina yekugovera:
Simba repamusoro AM Transmitter (mazana ezviuru zvemagetsi ekubuda akadai se100KW kana 200KW)
AM kutepfenyura antenna system (AM antenna uye shongwe yeredhiyo, antenna accessories, yakaoma mitsara yekufambisa, nezvimwewo)
AM bvunzo mitoro uye zvishandiso zvekubatsira.
Etc.
Kana dziri dzimwe nhepfenyuro, mhinduro yemutengo wakaderera inokwezva, semuenzaniso:
-Tenga AM Transmitter ine simba rakaderera (senge 1kW AM Transmitter)
- Tenga yakashandiswa AM Broadcast transmitter
-Kurenda AM radio tower yatovepo
- Nezvimwewo.
Semugadziri ane yakakwana AM nhepfenyuro yemidziyo yekugovera ketani, FMUSER ichabatsira kugadzira yakanakisa mhinduro kubva kumusoro kusvika kutsoka zvichienderana nebhajeti yako, unogona kuwana yakakwana AM nhepfenyuro nhepfenyuro kubva kusimba yakasimba simba AM transmitter kuenda ku AM test load uye zvimwe midziyo. , tinya apa kuti udzidze zvakawanda nezve FMUSER AM redhiyo mhinduro.
Ivo vevanhu AM Transmitter vanonyanya kuwanda pane yekushambadzira AM transmitter sezvo ivo vane mutengo wakaderera.
Ivo vanogona kukamurwa zvakanyanya kuita DIY AM transmitter uye yakaderera simba AM transmitter.
Kune DIY AM transmitters, vamwe vevanofarira redhiyo vanowanzo shandisa bhodhi rakareruka kubatanidza zvinhu zvakaita seaudio mukati, antenna, transformer, oscillator, tambo yemagetsi uye tambo yepasi.
Nekuda kwebasa rayo rakareruka, DIY AM transmitter inogona kungova nehukuru hwehafu yemichindwe.
Ndicho chikonzero nei iyi mhando ye AM transmitter ichingodhura gumi nemaviri emadhora, kana inogona kugadzirwa mahara. Iwe unogona kunyatso kutevedzera online tutorial vhidhiyo kune DIY imwe.
Low power AM transmitters anotengesa nemadhora zana. Ivo vanowanzo rack mhando kana kuoneka mudiki rectangular simbi bhokisi. Aya ma transmitters akaomarara kupfuura DIY AM transmitters uye ane vazhinji vadiki vatengesi.
TAURA NESU
FMUSER INTERNATIONAL GROUP LIMITED.
Isu tinogara tichipa vatengi vedu zvigadzirwa zvakavimbika uye masevhisi ane hanya.
Kana iwe uchida kuramba uchibata nesu zvakananga, ndapota enda ku taura nesu
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