Description
1W SA828 Intercom Module Small Size Embedded Full-Featured Miniature Intercom Kit Wireless Intercom Walkie Talkie
Product Description
SA828 is a full-featured walkie-talkie module with high cost performance. It has built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier. Our PC software can be used to easily and quickly set the module's mute, transceiver frequency and quietness level. parameter. Users only need to connect external power supply, speaker and audio potentiometer to this module, it can be used as a small walkie-talkie with 16 kinds of frequency channels adjustable. The simplified interface and ultra-small size enable this module to be widely used, and it can also be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal product.
Features
Full frequency range 400~480MHZ/134~174MHZ Transmit and receive frequency independent Bandwidth 12.5 / 25 KHz Output power up to 1W The transmission distance in the open field is 4-5 kilometers High receiving sensitivity: -124dBm High integration and small size 38-level CTCSS analog sub-audio code (can be set by PC software and serial port) 166-level CDCSS digital sub-audio (can be set by PC software and serial port) 8-level squelch Volume external potentiometer adjustment High and low power optional (500mW-1W) Wide range of working voltage 3.3-5.5V Built-in EEPROM, data is saved when power off Adopt 1.5ppmTCXO crystal, stable performance
Product application
small walkie-talkie Ignore the intercom system Building community security system audio monitoring system
Specification
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item
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value
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Operating voltage range
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3.3~5.5v, typ 4.2V
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Range of working temperature
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-30~70℃, typ 25℃
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Current consumption
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Guangdong
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sleep current
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<3uA
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receive current
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60mA
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Transmit Current (High Power)
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max 750mA, Typ 650mA
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Transmit current (low power)
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550mA, Typ 450mA
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Transmitting RF Parameters
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136-174MHz 400-470MHz
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Operating frequency range
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400~480MHZ
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Transmit power (high power) VCC=4.0V
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28~31dBm, Typ 29.5dBm
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Transmit power (low power) VCC=4.0V
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25~27dBm, Typ 26.5dBm
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Modulation sensitivity 1.5Khz/2.5KH frequency offset
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10mV
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Audio modulation distortion 1.5Khz/2.5KH frequency offset
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max 5%, Typ 2%
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Signal-to-noise ratio 1.5Khz/2.5KH frequency offset
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38~45dB, Typ 40dB
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Adjacent channel power 12.5K offset
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-60dBm
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CTCSS modulation frequency offset
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0.35~0.75, 0.5khz
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Receive RF parameters
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||
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Receive sensitivity, 13dB output voice signal-to-narrative ratio
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-124dBm
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Receive signal-to-noise ratio 1.5RHZ frequency offset
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max 50dB, Typ 45dB
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Audio output amplitude
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2w
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Audio output impedance
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8Ohm
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Installation Instructions
Pin definition
1, MIC+, the positive pole of the external microphone 2, MIC-, the negative pole of the external microphone 3. VOX EN, voice control enable pin, connect to "0" to have voice control function, default "1" output 4, 1, frequency 16-channel 8421 code, 1st bit, default "1" output 5, 2, frequency 16-channel 8421 code, the second bit, the default "1" output 6, 8, frequency 16-channel 8421 code, the 8th bit, the default "1" output 7, 4, frequency 16 channel 8421 code, 4th bit, default "1" output · 8. H/L, RF high and low power pins, connect to "0" for low power, leave floating for high power, 9, 10, 11, 13, 214; GND, connected to the power ground; 14,15; 4, SPK, audio output pin, external 8 ohm 2w speaker 16,17; 4, VOL, audio volume adjustment foot, external 100K adjustable potentiometer. 18, RXD4, serial port receiving data port 19, TXD, serial port send data port 20, 4, PTT, transmit/receive control pin, "0" is transmit; "1" is receive, default receive mode 22, VCC, the positive pole of the external 3.3~5V power supply. 23, CS, module sleep enable, "0" is sleep mode; "1" is normal work, the default is normal work
Details Images