890-900frecuencia megaciclos 6 7 8Receptor de vídeo inalámbrico COFDM DVB-T de ancho de banda Mhz, canal especial personalizado para evitar perturbaciones del canal de televisión local

compraré COFDM-907T vídeo – Audio, Transmisor – ReceptorHD 1080P. Lo usaré para FPV en los autos RC.. Pero,
1.. ¿Funcionará la cámara HD PTZ de 1080p??
2.. ¿Puede establecer la frecuencia de funcionamiento entre 890 – 900megahercio?
3.. ¿Puedes hacer que el ancho de banda de trabajo sea superior a 6 MHz??
4.. Cuán lejos (kilómetros) ¿Va entre los edificios de la ciudad??
5.. ¿Está conectado el micrófono??

Algunos clientes quieren utilizar nuestro receptor de televisión digital como receptor de vídeo inalámbrico COFDM., La frecuencia normal de DVB-T es de 170 a 860Mhz. Para evitar interferencias de los canales de televisión locales., esperan que la frecuencia funcione en 890Mhz y 900Mhz. en este video, Podemos mostrarte que modificamos dos frecuencias especiales en un ancho de banda de 6Mhz.. Funciona bien y recibe la señal del transmisor de vídeo inalámbrico COFDM-907T.. También podemos modificar hasta 930Mhz en el transmisor y receptor..

Gracias

COFDM-907T Transmisor-Receptor de Audio y Vídeo (1080P HD) – Customer Inquiry and Technical Clarification

A customer has expressed interest in purchasing the COFDM-907T Video–Audio Transmitter–Receiver HD 1080P system for use in FPV (Vista en primera persona) applications with RC cars. This type of system is commonly used in ground-based projects where stable, low-latency video transmission is required. Below are the customer’s key questions, followed by our detailed technical answers and additional clarifications regarding frequency range and bandwidth customization.

Customer Questions and Answers

1. ¿Funcionará la cámara HD PTZ de 1080p??
Sí, the COFDM-907T supports full HD 1080P video entrada. The important detail we must confirm is the type of video connector used by the PTZ camera. Our transmitter currently supports both HDMI y CVBS (video compuesto) entradas, which cover the most common camera interfaces.

If the customer’s PTZ camera outputs via HDMI or CVBS, it can be connected directly. sin embargo, if the PTZ camera requires remote control of its pan, inclinación, and zoom functions from the receiver side, then a bi-directional data link is necessary. This means the system must not only send video from the car to the ground station but also allow return control signals from the ground to the transmitter. Such a setup is possible but will increase cost and complexity. If the requirement is simply to view video without PTZ control, then the standard one-way COFDM-907T system is sufficient.

2. Can you set the operating frequency between 890–900 MHz?
Normalmente, COFDM wireless video systems, especially those compatible with DVB-T standards, are designed to operate in the 170–860 MHz range. sin embargo, we understand that in some regions, customers want to avoid interference from local digital TV channels or other devices operating in the lower bands.

Por esta razón, we can provide a custom modification to extend the supported frequency range. The COFDM-907T can be adjusted to work up to 930 megahercio, meaning that 890–900 MHz is fully achievable. This provides a clean operating band outside of typical DVB-T usage, reducing the chance of interference and improving stability in urban environments.

3. Can you make the working bandwidth over 6 megahercio?
Sí, our COFDM transmitters and receivers support multiple bandwidth options, typically including 6 megahercio, 7 megahercio, y 8 megahercio. Por defecto, many systems are configured at 6 megahercio, but we can adjust the bandwidth to suit customer requirements.

Wider bandwidth (P.EJ., 7 o 8 megahercio) permitir higher data rates, which can improve video quality and support higher resolution or frame rates. sin embargo, wider bandwidth also requires more available spectrum and may be more susceptible to interference. For professional applications like HD FPV video, a 6–8 MHz bandwidth is common and well-supported.

4. Cuán lejos (km) ¿Va entre los edificios de la ciudad??
En entornos urbanos, wireless video transmission is much more challenging compared to open line-of-sight (LOS) condiciones. Buildings, paredes, and other obstacles create a sin línea de visión (NLOS) ambiente, causando reflexión, absorption, e interferencia.

While the COFDM-907T can reach 10–15 km under LOS conditions, the range is naturally reduced in a city setting. Based on our field tests, when operating between buildings, árboles, y calles, the effective range is around 1 km in NLOS conditions. This is still stable enough for most FPV and RC car applications within a city. For improved range, using higher-gain antennas or selecting less congested frequency bands can help.

5. ¿Está conectado el micrófono??
Sí. Both HDMI and CVBS inputs on the COFDM-907T support audio and video together. Para hdmi, digital audio is embedded in the same signal as the video, while for CVBS, the system uses RCA connectors that carry composite video and audio. This means if the camera has a built-in microphone, the audio will be transmitted along with the video to the receiver.

Frequency Customization Example: 890–900 MHz Operation

Some clients have requested that our digital TV receiver be used as a COFDM wireless video receiver at frequencies outside the normal DVB-T allocation. Por defecto, DVB-T operates from 170–860 MHz. sin embargo, to avoid interference with local TV broadcasting, some users prefer to operate at 890–900MHz or even higher.

In response, we have successfully demonstrated that both the transmitter and receiver can be modified to work at 890 MHz y 900 MHz using 6 ancho de banda MHz. En nuestro video de prueba, the system worked smoothly at these frequencies and successfully received video from the COFDM-907T transmitter. además, we can extend the supported frequency range up to 930 megahercio, giving users more flexibility in selecting a clean operating channel.

Conclusión

The COFDM-907T is a versatile and reliable wireless video transmitter–receiver system suitable for HD 1080P applications in FPV RC cars and other mobile projects. It supports multiple video input formats, adjustable bandwidths, and customizable frequency ranges up to 930 megahercio. While line-of-sight range is significantly greater, in urban environments it can still provide stable transmission up to 1 km, making it practical for city-based FPV projects. Además, both video and audio (Transmisión de datos + telemetría todo en un enlace de datos) signals are supported, ensuring a complete transmission solution.

By addressing the customer’s questions, we can confirm that the COFDM-907T is a strong match for the project, and frequency customization ensures that interference can be avoided even in complex environments.