8.2GHz 4W VTX Video Transmitter, 56CH, Long Range Wireless Transmission for RC FPV Model

1. Main Specifications

2. Key Features

• • 7.0 to 8.2 GHz operation: Seven overlapping bands cover 7000 MHz to 8210 MHz, giving a total of 56 switchable channels for interference avoidance.

• • 4W RF output: Three selectable power levels of 200mW, 2W and 4W, with the module starting at the lowest level after power up.

• • Wideband FM audio and video: NTSC and PAL support, 75 Ω video input impedance and 0 to 8.0 MHz video bandwidth.

• • Camera power output: A 5V OUT pin on the harness can supply power to the camera.

• • Wide DC input: 16 to 30V DC operating range at 1.2A typical supply current.

• • Compact and light: 36 x 48 x 15 mm overall and 29g excluding the antenna.

• • Mechanical design: Rear cooling fan, four corner mounting holes with gold plated inserts, and a top mounted RP-SMA connector.

• • Thermal protection: Built in PTC temperature sensor with automatic power reduction and automatic recovery.

• • Button and LED control: Channel, band and power are set from two buttons, with red, blue and green LED feedback.

3. Electrical Ratings (Min. / Typ. / Max.)

4. Frequency and Channel Table (MHz)

5. Controls, LED Display and Protection

POWER button

• • Short press: cycles power levels 1 / 2 / 3 (200mW / 2W / 4W). The module defaults to the lowest power level after power up.

• • The red LED flashes slowly, and the number of flashes matches the current power level.

• • Press and hold for 2 seconds: enters PPT mode. Press and hold again for 2 seconds to exit.
  CH button

• • Short press: cycles channels 1 to 8. The green LED flashes a number of times matching the current channel, with pauses between flash sequences.

• • Press and hold for 2 seconds: enters band adjustment mode. Short press then switches between bands A / B / E / F / R / U / O. The blue LED flashes the current band, while the green LED flashes rapidly as a prompt.

• • The module exits band adjustment mode and returns to the normal channel adjustment interface automatically if no button operation is performed within 30 seconds.
  LED indicators

• • R-LED (red): Power level

• • B-LED (blue): Frequency band

• • G-LED (green): Channel number
  Overheating automatic protection

• • A built in PTC temperature sensing resistor monitors the PCB main board.

• • When the board temperature exceeds 120°C, the output power automatically drops to Level 1 (200mW) and the RGB tri-color indicator flashes rapidly as an alarm.

• • When the temperature falls back to 100°C, the module automatically restores the power level set before.
  Safety warning

• • Do not power on the module without a frequency matched antenna installed, otherwise the RF module will be burned out immediately.