Instruction manual link
FM Transmitter 500mW Stereo FOR Campus Radio
Output frequency: 88-108MHz 100KHz step （200 frequency transmissions）
Display mode: LCD display. The display content is the current transmitting frequency. The actual test transmitter is in the open field, and the maximum distance is 2000M
Output power: 500mM (0.5W)
Supply voltage: 5V USB-type-C
Supply current: 500mA
Input Signal: Audio Stereo 3.5M
Signal-to-noise ratio: 63dB0.05%THD
weight:120g
FM Transmitter Operation Manual
Operating Instructions for 0.5W FM Transmitter
Power supply requirements:
0.5W FM transmitter uses USB Type C interface for power supply, with power supply voltage
of 5V and consumption current of no more than 500mA.
Input audio signal:
3.5mm stereo audio socket, 3.5mm male audio cable is required.
Transmitting interface:
The transmitter side is SMA female head with external thread and internal hole. SMA male
head and signal wire of internal thread shall be used for connection. The characteristic
impedance of the signal line is required to be 50 ohms, Teflon material is recommended, the
recommended specification is 50-3, and the line length is not less than 2 meters.
Antenna requirements:
the working frequency should be 50 ohm pure resistive load, and the VSWR should not be
higher than 1.5.
Note: Since the transmitter’s transmission power is 0.5W, the transmitter will not be
damaged in the total reflection state, so the requirements for the antenna are not high. The more
qualified the antenna is, the farther the transmission distance is.
Description of operation sequence:
1. Connected to antenna
2. Connected to power supply
3. Connected to audio input
