DMR828 2W UHF VHF Digital Walkie Talkie Module NVOC AMBE++

SKU: DMR828-001
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$95.00 $130.00
DMR828 is a 2W long distance all-in-one DMR walkie talkie module. Only need external power supply and speaker, it is easy to become a professional digital walkie talkie. Simplified interface and Ultra small size make this module widely used in various app
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  • Frequency:
    134-174MHZ
    320-400MHZ
    400-470MHZ
  • Vocoder Version:
    NVOC
    AMBE++
Quantity:
  • DMR828 2W UHF VHF Digital Walkie Talkie Module NVOC AMBE++
  • Description
  • DMR828 is a 2W long distance all-in-one DMR walkie talkie module. Only need external power supply and speaker, it is easy to become a professional digital walkie talkie. Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld device.
  • Note:DMR828 has two vocoder versions:DMR828-NVOC & DMR828-AMBE.
  • DMR828 strictly uses lead-free process for production and testing, and meets RoHS and Reach standards.

Features

  • UHF band frequency: 400~470 MHz
    VHF band frequency: 134~174 MHz
    350 band frequency: 320~400 MHz
  • Distance up to 5Km
  • Max power output to 2W, low power to 0.5W
  • High Sensitivity:-124dBm
  • Bit error rate down to 1% under -121dBm
  • Independent frequency for Tx and Rx
  • Analog Bandwidth: 12.5 / 25 KHz   
  • Digital Bandwidth: 6.25KHz
  • Voice and text messages communication
  • Reminder for input calling, calling status checking
  • DMR /Analog walkie talkie
  • Message transmission and reception
  • Built-in EEPROM, data saved even powered off
  • 1ppm TCXO crystal
  • 51 CTCSS
  • 166 CDCSS
  • 9 adjustable volume
  • Enhanced encryption of Voice and Text message

Applications

DMR828 Applications

Parameters Test condition Min. Typ. Max. Unit.
Voltage range   3.0 4.0 5.0 V
Operating Temperature   -20 25 60
Frequency range @UHF 400   470 MHz
@VHF 134   174 MHz
@350 320   400 MHz
Uart baud rate     57600   bps

Current Consumption

Sleep current     75   uA
Rx current     < 135   mA
Tx current (high power) @VCC=5.0V,2W   < 1.1   A
Tx current (high power) @VCC=4.0V,1.5W   < 950   mA
Tx current (low power) @VCC=4.0V,27dBm   < 500   mA
Tx power(low power) @VCC=4.0V   1.5   W
Tx power(low power)   500   mW
Mic input voltage     0.1 1.6 Vpp
Sensitivity     -124   dBm
Receiving BER(DMR modulation) @ -121dBm   1   %
Audio output amplitude     2   V
Audio Output impedance     8   KOhm






 
 

Typical Schematic Circuit

 

DMR828 Typical Application Circuit

 

Parameter configuration

DMR828 Module offers standard serial port, users can configure and read the related parameters by sending serial instructions. Module has built-in memory, all configured parameters can be saved even power off. Meanwhile, we offer PC software to customers free of charge. DMR828 can be connected with computer via USB cable or UART interface, in this way, users can configure the parameters on PC software or their own device. The connection as shown in the figure below:

 

 

Pin Assignment:

DMR828 Pin Definition

Pin NO. Pin name Description
1 VCC Positive supply
2,4 GND Ground
3 CS Leave Open or high level for normal working, pull low to enter  sleeping mode
5 PTT Module Input, Transmitting/receiving control, pull low to  force the module to enter TX state; pull high for Rx state
6 LINE_OUT Audio output without amplified
7 8 16 Channels, Code 8421, 8th,default output “1”
8 4 16 Channels, Code 8421, 2th,default output “1”
9 2 16 Channels, Code 8421, 2nd,default output “1”
10 1 16 Channels, Code 8421, 1st,default output “1”
11 SPKN Audio output, connect to speaker 8Ω 2W
12 SPKP Audio output, connect to speaker 8Ω 2W
13,15,17,24 GND Ground
14 SET Configuration mode enable (low to enter into the setting mode, leave open or connect high level to exit setting mode) Valid when CS Pin is high or leave open.
16 MIC_IN Microphone or line in
18 UART-TX TXD of the module and connect to external RXD
19 UART-RX RXD of the module and connect to external TXD
20 EZP_CS Reserved
21 SWCLK Reserved
22 SWDIO Reserved
23 ARM_RST Reserved

 

 

Mechanism Dimension:

DMR828 Mechanical Dimensions

Datasheet Download

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