DMR858S : 5W Embedded DMR Tier II Walkie Talkie Module
Type: DMR Walkite Talkie
Certification: Others
Output Power: 1W,5W
Size:59.1*24.1(motherboard) 37.6*24.2(PJ)
HOME > PRODUCTS > WALKIE TALKIE MODULES > DMR858 : 5W ALL-IN-ONE DMR WALKIE TALKIE MODULE
DMR858 : 5W ALL-IN-ONE DMR Walkie Talkie Module
DMR858 is an 5W ALL-IN-ONE DMR walkie talkie module. It combined analog and DMR walkie talkie function, and compatible with the walkie talkie in the market. DSP processor, DMR encoder/decoder, RF / Audio Amplifier, PTT, Microphone, 16 Channel switch, Volume adjustment all on board. Connected with power supply and speaker, it build a 5W professional DMR walkie talkie. This product has very good voice quality and very good range. Also special heat sinks are designed specially to guarantee long time talking without any problems.
| Parameters | Condition | Min | Typ | Max | Unit |
| Power Supply | 3.3 | 8 | 9.0 | V | |
| Working temperature | -30 | 25 | 70 | ℃ | |
| Frequency Range | @UHF | 400 | 480 | MHz | |
| @VHF | 134 | 174 | MHz | ||
| @350 | 320 | 400 | MHz | ||
| Serial baud rate | 57600 | bps | |||
| Current Consumption | |||||
| Sleep current | <50 | uA | |||
| RX Current | @VCC=8.0V | < 100 | mA | ||
| TX current | @VCC=8.0V,5W | < 1.6 | A | ||
| @VCC=8.0V,3W | <1.1 | A | |||
| @VCC=4.0V，1.8W | < 1000 | mA | |||
| @VCC=4.0V,1W | < 750 | mA | |||
| TX Power | @high power，4v | 1.6 | W | ||
| @low power,4v | 1.0 | W | |||
| @high power，8v | 4 | 5 | 5.5 | W | |
| @Low power，8v | 2 | 3 | 3.5 | W | |
| Mic input voltage | 0.1 | 1.6 | Vpp | ||
| RX Sensitivity | -124 | dBm | |||
| BER @DMR mode | @ -121dBm | 1 | % | ||
| Speaker | 2W & 8 ohm | ||||
| Type | DMR walkie talkie |
| Output Power | 5W |
Features of DMR Walkie Talkie Module DMR858
- UHF band frequency：400~470 MHz
- VHF band frequency：134~174MHz
- 350 band frequency：320-400MHz (3 frequency bands are optional)
- Voice encoder: NVOC
- AMBE++(MOTO compatible) (2 voice encoders are optional)
- 7 Km in open area
- Output power up to 5W
- Sensitivity up to：-124dBm
- Less than 1% BER @ -121dBm
- TX/RX frequency set separately
- Bandwidth for analogy: 12.5/25KHz
- Bandwidth for DMR: 6.25KHz
- Combined DMR / Analog walkie talkie
- Support IP confirmed/unconfirmed SMS. Provide pre-save SMS
- 1ppm TCXO Crystal
- CTCSS: 51 levels CDCSS: 166 levels
- Digital volume: 9 class
- Analog volume: continuous (stepless)
- Encryption for SMS and voice
- Support various voice calling types: Broadcast, group call and private call
- Reminder for input calling, calling status checking
- Support enhanced function such as emergency alarm and radio monitor
- Support Frequency scan
- Support Radio kill and activate
- RSSI value read out
- Provide PC software to configure
- EEPROM inside, parameters stored even powered off
Application of DMR Walkie Talkie Module DMR858
- DMR858 include 3 parts: DMR858 Functional board
- DMR858PJ control board
- DMR858 heat sinks.
- Connected with power supply and speaker, it can be a professional long range DMR walkie talkie.
- All the 3 parts will be connected together before shipping.
- DMR858 Functional Board Pin Assignment
| Pin No | Definition | Description |
| 1, 2, 4 | GND | Ground |
| 3 | MIC_IN | Microphone input |
| 5 | UART-RX | Connected with UART-TX of external device |
| 6 | UART-TX | Connected with UART-RX of external device |
| 7, 13 | GND | Ground |
| 8 | CS | Sleep: 0 ; working: 1 (default when leave open) |
| 9 | PTT | TX: 0, RX: 1 ( Default) |
| 10 | LINE_OUT | Line out for voice |
| 11 | T/R | TX/RX indicator, 1: TX , 0: RX |
| 12 | SPKEN | External Voice amplifier on/off, 1: on, 0:off |
| 14, 15 | +3.3 V | 3.3V output，maximum 50mA loading |
| 16,17,18,19 | VCC | VCC (3.3V-9V) |
| 20 | GND | Ground |
- DMR858-PJ (Control Board ) Pin Assignment
| Pin No. | Definition | Description |
| 1 | VCC | VDD (connected to Pin 19 of function board) |
| 2,4 | GND | Ground |
| 3 | CS | Connect to CS of the function board |
| 5 | PTT | Connect to PTT of the function board |
| 6 | LINE_OUT | Connect to Line Out of the function board |
| 7 | 8 | Frequency channel indicator,( 16 channel selected ) 8 :the maximum bit, 4: the 3rd bit, 2: the 2nd bit; 1: the least bit for example : 8421 encoding: 0000: channel 0, 0001: channel 1 0010: channel 2 0011 :channel 3 … 1111 : channel 15 |
| 8 | 4 | |
| 9 | 2 | |
| 10 | 1 | |
| 11 | SPKN | Connected with Speaker: 8 Ohm 2W |
| 12 | SPKP | |
| 13,15,17 | GND | Ground |
| 14 | SET | Setting mode (0: setting mode , 1: normal mode ) |
| 16 | MIC_IN | Connect to Mic_IN of the function board |
| 18 | TXD | Connect to TXD/RXD of the function board |
| 19 | RXD | |
| 20 | +3.3V | 3.3V output，can drive 50mA |
| 21 | SPKEN | Audio amplifier control |
| 22 | NC | NC |
| 23 | H/L | Output power control,connect to GND is low power |
| 24 | GND | Ground |
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