Transmisor FM estéreo de 2 km y 0,5 W, señal de onda corta de 76-108 MHz, emisora FM estéreo. Escuela, aparcamiento, iglesia.

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