FM Radio Stereo Digital Audio Receiver Module Frequency Modulation Receiving Circuit Board With Silencing LCD Display | Электроника

FM Radio Stereo Digital Audio Receiver Module Frequency Modulation Receiving Circuit Board With Silencing LCD Display | Электроника

Features:
1: Using advanced digital audio signal processing technology (DSP) and FM phase-locked loop modulation (PLL) technology to make the sound quality more realistic, more stable performance, long-term operating frequency without offset.
 2: LCD display is more intuitive and accurate, with very low power consumption and minimal noise interference.
 3: 30-level digital volume adjustment, easy to complete with the button operation.
 4: Automatically memorize the data before power off.
 5: Speaker/headphone output automatically switches
 6: Using quartz crystal to stabilize the frequency, the temperature changes the receiving frequency and no longer drifts.
 7: The professional audio DSP is used to analyze and process the audio signal. When there is no signal or weak signal, the FM bottom noise is automatically muted, and the traditional FM radio is free from the rustling sound when there is no signal or the signal is weak.
 8: Adjust the volume and frequency by using the incremental digital rotary encoder. It has good hand feeling, accurate positioning, stable and durable, and 360° rotation without dead angle.
 9:30 level digital volume adjustment range
 10: Support serial communication control, all functions of the device control module with serial port such as computer or MCU can be used.

 Product parameters:
Output power: 500mW, 3Wx2
Frequency response range: 50Hz-18KHz
Receiving frequency range:
Turn off campus broadcast 87.0MHz-108.0MHz,
Open campus broadcast 76.0MHz-108.0MHz
Equivalent noise: ≥30dB
Supply voltage: 3.0V-5.0V
Supply current: 1000mA at maximum volume, 60mA at minimum volume (for reference only)
Channel: Stereo

 Instructions for use
<1>: Power supply
The battery is recommended to use a battery or other regulated power supply. Switching power supply without filter can not be used, otherwise the interference generated by the power supply will affect the normal operation of this module. The operating voltage is 3.0-5.0V and the maximum supply current is 1A.
<2>: Antenna
The FM_ANT port is used to connect the FM antenna. In order to receive the FM signal better, it is recommended to connect an external 75cm rod antenna.
<3>: Headphone/horn output
This module comes with a 3WX2 channel audio amplifier. If you need a speaker to access the speaker port, it is recommended to use 4Ω/3W speaker. If a headset is plugged in, the audio automatically switches to the headphone channel and the speaker channel automatically turns off.
<4> Volume adjustment
     Turn the VOL encoder to adjust the volume while the LCD screen displays the volume level.
<5> Frequency adjustment
     Turn the FRE encoder to adjust the receiving frequency, while the LCD screen displays the current frequency, and the encoder handle is pressed down to mute/non-mute switching.
<6>Silent
Press the VOL knob down to toggle mute/unmute
<7>Automatic squelch switch
  Press and hold the FRE knob down to toggle the auto squelch function on or off. The LCD displays subtitles ON to turn on automatic squelch and OFF to turn off auto squelch.
<8> Automatic squelch threshold (threshold) adjustment (valid when the automatic squelch switch is turned on)
  Press the FRE knob down to enter the automatic squelch threshold adjustment interface. The user can adjust the automatic squelch action threshold according to the specific usage. The adjustment range is 0-20. The larger the value, the higher the threshold, the easier the weak signal is. Mute. The opposite is true.
<9>: Connect to serial port (no need to connect to serial port control)
     The module reserves the TTL level serial port control interface. The TTL serial port communicates with this module. It needs to connect the module's UART_RX, UART_TX and GND (the corresponding position on the PCB). It can be sent by the external MCU (single-chip microcomputer) or the computer serial port to send the command control module. Features. Note: Because the serial port level of the computer is not TTL level, you need to connect RS323 level to TTL level replacement device or use USB to TTL level serial port module to communicate with this module when connecting to computer. Because the serial command control module requires a certain amount of computer expertise, buyers who do not understand need not toss. All the information see baby instructions, customer service does not provide technical guidance in this regard.
<10>: Stereo (monophonic) / mono (mono) switch terminal
     The Stereo/mono terminal is used to set the module's FM receive mode. This terminal is left in stereo reception mode. This terminal is in mono receive mode.
Four: Note:
Do not touch the back components of the module during work, so as not to affect the normal operation of the module or cause the short circuit to burn the module.