COFDM Relay Repeater module for drone UAV wireless video transmitter and receiver Vcan1870

COFDM wireless video repeater relay module accepts COFDM signals from two antennas (or one) and demodulates them before re-modulating and transmitting via one antenna.

This relay module can quickly find and lock to an incoming transmission based on the pre-set frequency and bandwidth.

Specification:

IO

RF input	Two SMA females (to receive the signal)
RF output	MMCX female (to send out the signal again)
control uart	4PIN PH1.25mm Connector
Power in	2PIN PH2.54mm phenix Connector
TF-card	For firmware update
Power led	red led, constant light when the device is normally powered
Link led	green led, blinks on transmitting the received data

Demodulation and Modulation

Modulation Formats	COFDM(DVB-T)
Carriers	2K
Bandwidth	Configurable from 1MHz to 8MHz, step by 1KHz
FEC	1/2, 2/3, 3/4, 5/6, 7/8
Guard interval	1/32, 1/16, 1/8, 1/4
Constellation	QPSK, 16QAM, 64QAM
Bitrates	0.5Mbps to 31.67Mbps

RF Received

Frequency Bands	160MHz~860MHz (need an extra downconverter block for 860-2300Mhz)
Tuning Step size	1KHz
Sensitivity	-97±1dBm(BW=8MHz, QPSK, CR=2/3, GI=1/16) for one channel and add 3dBm for two-channel

RF Transmitted

Frequency Bands	200MHz~2300MHz(other bands can be supported with special manufacturing)
Tuning Step size	1KHz
Power out	Configurable, maximum -5dBm(subject to frequency)

Monitoring and control
This COFDM relay repeater module can complete setup with our Parameter Configure Tool or STM32+LoRA (or other devices) via control uart. With our parameter configure too, the following parameters can be setup:
– RX Received frequency (F1) and bandwidth (B1)
– TX Transmitted frequency (F2), bandwidth (B2), FEC, guard interval, constellation, and transmission power

Temperature range
Full specification: 0° to +70°C Ambient
Storage: –40° to +80°C

Power requirements
Input range: 7~24VDC
Power consumption: <[email protected]

Physical Characteristics
Dimensions: 73x51x15mm
Gross Weight: 32.4 grams

 

UART AT commands

The AT commands mainly used in the COFDM Wireless Relay Repeater are ATDR, ATSD, ATGD, ATSR, ATGR, and ATGB. For the introduction of specific commands, see the document.