FM Radio Module Stereo FM Receiving Board R030

Product Description

Parameter:
Power supply: DC 3.0V to 12V
Working current: 22mA
Shutdown current: 30uA
Receiving frequency range: 76.0MHz-----108.0MHz
Sensitivity: 1.3uV
Volume: Level 9, silent mode 0, maximum volume 8
Output: It can directly drive universal earplugs. It can also be directly used as the signal input for the power amplifier.
Dimensions: The board is 53mm in length and 31.7mm in width
The frequency and volume have a power-off memory function.
When the device is off, press any key to turn it on and hold down the V- key to turn it off

Volume: 0 is silent and 8 is the loudest

Internal structure perspective

Instructions for Use
1.Press the F+ key briefly to search for radio stations upwards. Once a station is found, it will stop and play that station.
   Hold down the F+ key for a long time, and the receiving frequency will increase in steps of 0.1MHz.
2.Press the F- key briefly and search for radio stations downward. Once a station is found, it will stop and play that station.
    Hold down the F- key for a long time, and the receiving frequency will decrease in steps of 0.1MHz.
3.Press the V+ key briefly to increase the volume by one level, with the maximum setting being 8.
    Long press the V+ key to restore the factory default parameters: frequency 99MHz, volume 6.
4.Press the V- key briefly to reduce the volume by one level. The minimum setting is 0 and mute.
    Press and hold the V- key to turn off the device.
5. After shutting down, press any key to turn it on.
6. There is no key operation. After 30 seconds, the backlight goes out. After three minutes, the LCD display goes out and the peripheral circuits gradually enter a sleep state.
7. After the light goes out, pressing any key will wake up the relevant circuit, and the light and screen will resume display. This key press has no function and only serves to wake up. When the light comes on, each key has its corresponding function.
8. The Line O socket is for audio output, with a standard 3.5mm specification, and can directly drive commonly used 32-ohm earplugs.
9. The ANT socket is for connecting antennas. The complimentary antenna may not be the best fit, but it can meet the daily application requirements. The extension length of the antenna is 25CM.

Common consultation questions
1.Is it stereo?
   Answer: Yes, it's dual-channel stereo.
2. How is the degree of separation? (Sound separation degree)
    Stereo separation indicates the degree of isolation between the left and right channels in a stereo sound system. It actually reflects the degree of cross-interference between the left and right channels. If the cross-interference between the two channels is significant, the stereo effect of the reproduced sound will be weakened. Stereo separation is usually expressed as the difference between the signal level in one channel and the level that leaks into the other channel. If the resolution is poor, the stereo effect will be weakened. The stereo resolution of FM stereo broadcasting stipulated by the European Broadcasting Union is >25dB, while the local standard is 35dB.