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DMR828S : 2W DMR Tier II Walkie Talkie Module With AMBE++
Type: DMR Walkite Talkie
Certification: Others
Output Power: 500mW,2W
Size (mm):65.84*38.88
HOME > PRODUCTS > WALKIE TALKIE MODULES > DMR818S-5W DIGITAL WALKIE TALKIE MODULE 0.5PPM TCX...
DMR818S-5W Digital Walkie Talkie Module 0.5PPM TCXO
DMR818S-5W is a 2W long distance DMR walkie talkie module, it comes with built-in high performance micro-controller, digital mobile radio IC and RF power amplifier. All parameters (CTCSS, CDCSS, SQ, Predefined channels etc.) can be easily modified with protocol. With external power supply, speaker, and audio amplifier, 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. Additionally, Compared to the DMR818S module, the DMR818S-5W achieves a 5W transmission power increase while maintaining the same package size and pinout, further enhancing communication distance and coverage capability.
DMR818S-5W strictly uses lead-free process for production and testing, and meets RoHS and Reach standards.
applications and conveniently embedded into various handheld device. Additionally, Compared to the DMR818S module, the DMR818S-5W achieves a 5W transmission power increase while maintaining the same package size and pinout, further enhancing communication distance and coverage capability.
DMR818S-5W strictly uses lead-free process for production and testing, and meets RoHS and Reach standards.
Parameters | Test condition | Min. | Typ. | Max | Unit |
Voltage range | 3.7 | 7.4 | 8.5 | V | |
Operating Temperature | -20 | 25 | 60 | ℃ | |
Frequency range | @UHF | 400 | 470 | MHz | |
@VHF | 134 | 174 | MHz | ||
@350 | 320 | 400 | MHz | ||
Start time | 2000 | ms | |||
Uart baud rate | 57600 | bps | |||
Current Consumption | |||||
Sleep current | CS pulled low for 3 seconds | < 55 | uA | ||
Rx current | <160 | mA | |||
Tx current （high power） | @VCC=8V, 5w analog | <1700 | mA | ||
@VCC=8V, 5w digital | <1000 | mA | |||
Tx current （low power） | @VCC=8V, 2w analog | <1100 | mA | ||
@VCC=8V, 2w digital | <700 | mA | |||
RF Parameters | |||||
Tolerance of frequency | 0.5 | 1.5 | ppm | ||
Modulation sensitivity | 1.5KHz/2.5KHz frequency offset (N/W) | 6 | 7 | 12 | mv |
Adjacent-channel power | @12.5K offset | -60 | -62 | dBm | |
Mic input voltage | 0.1 | 1.6 | Vpp | ||
CTCSS modulation frequency offset | 0.35 | 0.4 | 0.6 | KHz | |
Modulation characteristics | 300HZ | -13 | -11 | -9 | dB |
500HZ | -9 | -6 | -5 | dB | |
1000HZ | -3 | 0 | 1 | dB | |
2000HZ | 3 | 6 | 7 | dB | |
3000HZ | 5 | 7 | 11 | dB | |
Receive Parameters | |||||
Sensitivity | Analog (12db SNR) | -120 | dBm | ||
Receiving BER(DMR modulation) | @ -117dBm | 5 | % | ||
Audio output amplitude | 500 | mv | |||
Audio Output impedance | 30 | KOhm | |||
Adjacent channel selectivity | Offset:+12.5KHz | 60 | dB | ||
Offset:+12.5KHz | |||||
Features of DMR Walkie Talkie Module DMR818S-5W
- UHF band frequency: 400~470 MHz
VHF band frequency: 134~174 MHz
350 band frequency: 320~400 MHz - Distance up to 7Km
- Max power output to 5W, low power to 2W
- High Sensitivity: -122dBm
- Bit error rate down to 5% under -117dBm
- Independent frequency for Tx and Rx.
- 9 adjustable volume
- Analog Bandwidth: 12.5 / 25 KHz Digital Bandwidth:6.25KHz
- Message transmission and reception
- DMR(Digital Mobile Radio)/ Analog walkie talkie
- Built-in EEPROM, data saved even powered off
- 1ppm TCXO crystal
- 51 CTCSS
- 166 CDCSS
Applications of DMR Walkie Talkie Module DMR818S-5W
- DMR walkie talkie module
- Invisible intercom system
- Building security system
- Audio surveillance system
DMR Mode of DMR Walkie Talkie Module DMR818S-5W
- Message transmission and reception.
- Enhanced encryption of Voice and Text message.
- Various voice call types: All call, Group call and Private call;
- Reminder for input calling, calling status checking
- Emergency alarm and radio monitor;
- Repeater
Analog Mode of DMR Walkie Talkie Module DMR818S-5W
- CTCSS/CDCSS configurable
- Squelch levels configurable
Pin NO. | Pin name | I/O | Level standard | Description |
1 | MIC_IN | I | Microphone Signal Input | |
2 | UART-TX | O | 0-3.3V | Transmit |
3 | UART-RX | I | 0-3.3V | receive |
4, 12 | NC | |||
5 | HST_TXD | O | 0-3.3V | Transmit data pin (for upgrading program) |
6 | HST_RXD | I | 0-3.3V | Receive data pin (for upgrading program) |
7 | ANT | RF Input/Output Pin connect 50 ohm antenna | ||
8, 9, 10 | GND | - | Ground | |
11 | VCC | - | 0-8V | Power Supply Positive |
13 | CS | I | 0-5V | Module Sleep Enable Pin, "0" for sleep, "1" for working state |
14 | PTT | I | 0-3.3V | Transmit/Receive Control Pin, "0" for transmit, "1" for receive, default receive mode (this pin cannot be pulled low during power-up, it must be pulled low after power-on reset is complete) |
15 | +3.3V | - | 3.3V output，connect to 50mA | |
16 | LINE_OUT | O | Audio output | |
17 | T/R | O | 0-3.3V | Module Transmit/Receive Status Indicator Pin, outputs high level in transmit state, low level in receive state |
18 | SPKEN | O | 0-3.3V | Receive Signal Indicator Pin (can be externally connected to control audio amplifier), high level is active, default is low level |
19, 20 | GND | - | Ground |
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