DVB-T с мелодия VHF-UHF чрез входна честота в стъпка 1MHz

Клиент се нуждае от DVB-T с настройка на VHF-UHF чрез входна честота на стъпка от 1MHz. 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.

Препоръчваме модела по-долу: VCAN1776-HDMI

This is how COFDM DVB-T receivers meet customer requirements. Our tuning step is 1KHz (разбира се, 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

формат	atsr $(честота), $(bw ), $(llc), $(cvbs)_ Пример: ATSR320000,6000,0,0_
параметър	1. DR2C носеща честота честота(KHz) 200000~860000(200MHz ~ 860MHz, 1KHz стъпка) 2. DR900 носеща централна честота честота(KHz) 200000~1600000(200MHz ~ 1,6 GHz, 1KHz стъпка) 3. DR2C честотна лента bw(KHz) 2000~8000(2MHz~8MHz, 1KHz стъпка) 4. DR900 честотна лента на канала bw(KHz) 3200~8000(3.2MHz~8MHz, 1KHz стъпка) 5. Опция за подобрена надеждност на данните llc: 0 деактивирайте; 1 активирайте (изисква се предавателят да активира и тази опция едновременно, и го използвайте по двойки. Тъй като се добавят повече излишни данни за подобряване на надеждността, видео битрейтът на предавателя трябва да бъде зададен на, когато тази опция е изключена наполовина) 6. AV изходна система cvbs: 0 приятел; 1 ntsc
употреба	За да настроите параметъра на приемника
Върната стойност	пример: ATSR320000,6000,0,0_ ATSR320000,6000,0,0 OK
Забележка	команда за настройка, запазване, когато захранването е изключено.

Change DVB-T Frequency by a parameter configuration tool

COFDM RX vxx
S1: антена 1 сила на сигнала (0~100%)	S2: антена 2 сила на сигнала (0~100%)
F: Честота (KHz)
B: Bandwidth (KHz)
P: 6-цифрова парола (с показана парола: ——, без показана парола: 000000)

The decoder failed to demodulate the signal from the LNB. I tested QPSK, 16QAM, и 64qam, using guard intervals of 1/32 и 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 Преобразувател на честота.

Most DVB-T receivers on the market support automatic channel search. Например, 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. Например, 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