1MHz 단계에서 입력 주파수별 튜닝 VHF-UHF가있는 DVB-T

고객은 1MHz 단위로 입력 주파수로 VHF-UHF를 조정하는 DVB-T가 필요합니다.. Here is his demand.

I am looking for a DVB-T receiver with diversity inputs that can be tuned by inputting frequency and not by TV channel number.
I am trying to build a system to receive a transmission in 2.0-2.63GHz using LNB’s with 1838MHz LO – so I need to be able to tune VHF-UHF by inputting a frequency in 1MHz steps. So tuning 2610MHz I would need to enter 2610-1838=772MHz and for 2256MHzI would enter 2256-1838=418MHz.

아래 모델을 추천드립니다: Vcan1776-HDMI

This is how COFDM DVB-T receivers meet customer requirements. Our tuning step is 1KHz (물론이야, you can also tune in 1Mhz units). We have two ways to change the frequency.

Change DVB-T Receiver frequency via AT Command serial port

체재	ATSR $(주파수), $(BW ), $(LLC), $(CVBS)_ 예: ATSR320000,6000,0,0_
매개 변수	1. DR2C 캐리어 주파수 FREQ(kHz에서) 200000~ 860000(200메가 헤르츠 ~의 860MHz, 1kHz 간격) 2. DR900 캐리어 센터 주파수 FREQ(kHz에서) 200000~ 1600000(200MHZ ~ 1.6GHz, 1kHz 간격) 3. DR2C 채널 대역폭 BW(kHz에서) 2000~ 8000(2MHz~8MHz, 1kHz 간격) 4. DR900 채널 대역폭 BW(kHz에서) 3200~ 8000(3.2MHz~8MHz, 1kHz 간격) 5. 향상된 데이터 안정성 옵션 LLC: 0 장애를 입히다; 1 ~할 수 있게 하다 (송신기 도이 옵션을 동시에 활성화해야합니다., 쌍으로 사용하십시오. 신뢰성을 높이기 위해 더 중복 데이터가 추가되므로, 이 옵션이 절반을 끄면 송신기의 비디오 비트 속도를 설정해야합니다.) 6. AV 출력 시스템 CVBS: 0 단짝; 1 NTSC
용도	수신기 매개 변수를 설정합니다
반환 값	예: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK
말	설정 명령, 전원이 꺼질 때 저장하십시오.

Change DVB-T Frequency by a parameter configuration tool

COFDM RX vxx
S1: 안테나 1 신호 강도 (0~100%)	S2: 안테나 2 신호 강도 (0~100%)
에프: 회수 (kHz에서)
비: 대역폭 (kHz에서)
피: 6-숫자 비밀번호 (비밀번호가 표시된 상태에서: ——, 비밀번호가 표시되지 않은 상태: 000000)

The decoder failed to demodulate the signal from the LNB. I tested QPSK, 16QAM, 그리고 64qam, using guard intervals of 1/32 과 1/16. I also tested three different frequencies.

Please connect the LCD reference board first and take pictures for us to see if the wireless signal is locked? Make sure the signal is locked.

The customer also mentioned that they need a device, 2.0-2.63GHz using LNB’s with 1838MHz LO, to reduce the input frequency of 2000～2630Mhz, reduce 1838Mhz, and output 162Mhz~792Mhz. We can also provide such a device. Please refer to our 주파수 다운 컨버터.

Most DVB-T receivers on the market support automatic channel search. 예를 들면, they have bandwidths of 8M or 6M, and there are also 7M for Australia. In order to save waiting time for searching channels, they will only search channels on designated channel numbers or corresponding frequencies.

Even though there is a manual channel search function, it can only select the corresponding channel from the drop-down channel number. It does not allow you to manually enter the frequency to search for channels. 예를 들면, if I want to search for 473Mhz, it does not have an option for you to enter 473 through the remote control to search for this specified frequency.

Customers with this need, such as some professional application scenarios, cannot meet or realize this function with ordinary TV boxes. Our professional, customizable COFDM receiver 1776 can search channels in 1M and 1K steps.
There are two ways to input the specified frequency. The first is to send a command through the serial port, and the second is to use additional parameter configuration tools to adjust parameters such as frequency bandwidth.

Another model supports to enter the frequency via manual search