DMR828S : 2W DMR Tier II Walkie Talkie Module With AMBE++

DMR828S : 2W DMR Tier II Walkie Talkie Module With AMBE++

DMR828S is an ALL-IN-ONE DMR 2W professional walkie talkie module. It combined analog and DMR Tier II walkie talkie function. This product is compatible with DMR radio with Moto AMBE++ and all the analog walkie talkie in the market. DMR828S is easy to use , which embedded DSP processor, DMR encoder/decoder, RF / Audio Amplifier, PTT, Microphone, 16 Channel switch, Volume adjustment all on board. Just connected with power supply and speaker, it build a 2W professional DMR walkie talkie. DMR828S has long range and good voice quality. Special heat sinks are designed specially to guarantee long time talking.
The digital intercom supports the following functions in DMR mode:
SMS sending function, support pass-through and SMS application;
Voice encryption function, SMS encryption function;
Calling and called prompts.

DOWNLOAD

Parameters	Condition	Min	Typ.	Max	Unit
Power Supply		3.3	4.0	5	V
Working temperature		-20	25	60	℃
Frequency Range	@UHF	400		470	MHz
	@VHF	134		174	MHz
	@350	320		400	MHz
Serial baud rate			57600		bps
Current Consumption
Sleep current	@CS pulled low for 3 seconds		< 1		mA
RX Current			< 165		mA
TX current(High power)-DMR	@VCC=4.2V,2w		400-1200		mA
TX current(Low power)-DMR	@VCC=4.2V,0.5w		200-600		mA
TX current(High power)-Analog	@VCC=4.2V,2w		< 1300		mA
TX current(Low power)-Analog	@VCC=4.2V,0.5w		< 700		mA
Analog Rx Parameters
Rx sensitivity (Analog)	@12dB SINAD		-120		dBm
S/N	@1.5K deviation		40		dB
Adjacent channel selectivity	12.5KHz offset		62		dB
Inter modulation Rejection	12.5KHz offset		63		dB
Blocking immunity	Interference frequency interval > 1M		88		dB
audio amplitude (line out)	F0=1KHz	0.2	130	460	mV
output impedance of audio(SPK)			8		Ohm
Audio distortion	F0=1KHz			5	%
Audio response	300Hz		8		dB
	500Hz		6
	1KHz		0
	2KHz		-6
	3KHz		-12
DMR Rx parameters
BER（DMR Mode）	@ -117dBm		4		%
Adjacent channel selectivity（ACS)	Offset:+12.5kHz	60			dB
Adjacent channel selectivity（ACS)	Offset:-12.5kHz	60			dB
Intermodulation Rejection	Offset:+50/100kHz	63			dB
Intermodulation Rejection	Offset:-50/100kHz	63			dB
Blocking immunity	Offset:+/-1MHz	87			dB
Blocking immunity	Offset:+/-5MHz	87			dB
Analog Tx Parameters
Max Freq deviation	12.5KHz deviation（N）		2.2	2.5	KHz
Max Freq deviation	25KHz deviation（W）		4.5	5	KHz
Sensitivity	deviation: 1.5KHz/2.5KHz	4	7	10	mV
Audio distortion	deviation: 1.5KHz/2.5KHz		1	5	%
Modulation characteristic	300Hz	-13	-11	-9	dB
	500Hz	-9	-6	-5	dB
	1KHz	-3	0	1	dB
	2KHz	3	6	7	dB
	3KHz	3	7	11	dB
CTCSS deviation		350	400	600	Hz
output power of adjacent channel	12.5KHz offset	-63	-65		dBc
SNA	1.5KHZ/2.5KHZ	38	40	50	dB
DMR Tx parameters
frequency error			0.5		ppm
4FSK Tx BER				≤1×10-4
output power of adjacent channel	+/-12.5kHz			≤-55	dB
output power of next adjacent channel	+/-25kHz			≤-65	dB

Type	DMR walkie talkie
Output Power	2W

Features of Walkie Talkie Module DMR828S

UHF band frequency：400~470 MHz
VHF band frequency：134~174MHz
350 band frequency：320-400MHz (3 frequency bands are optional)
5 Km in open area
Max power output to 2W, low power to 1W
Sensitivity up to：-120dBm
Less than 2% BER @ -117dBm
TX/RX frequency set separately
Bandwidth for analog:12.5 / 25 KHz
Bandwidth for DMR:6.25KHz
DMR / Analog walkie talkie
SMS transmission and reception
Built-in EEPROM, data saved even powered off
Low power consumption in sleep mode
DMR Tier II
Tail sound eliminationautomatically
Embedded design for handheldproduct

Applications of Walkie Talkie Module DMR828S

Applications of Digital Walkie Talkie DMR828S

Typical Application Circuit of Walkie Talkie Module DMR828S

Pin NO.	Pin name	I/O	Description
1	VCC		VCC ( 3 - 5V )
2,4	GND		Ground
3	CS	I	0: Sleep; 1: working (high level or leave open)
5	PTT	I	0: TX, 1: RX
6	LINE_OUT	O	Audio output without amplified
7	8	I	Frequency channel selection,( 16 channels )
			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
8	4		0011 :channel 3
9	2		…
10	1		1111 : channel 15
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	SPKEN	O	Valid signal indicator, 1: signal valid, 0: No valid signal received. This pin can be used to drive external voice amplifier. 1: on, 0:off
16	MIC_IN		Microphone or line in
18	UART-TX	O	TXD of the module and connect to external RXD
19	UART-RX	I	RXD of the module and connect to external TXD
20,21	NC
22	HST_TXD	Reserved	Serial port to send data pin (for upgrading program)
23	HST_TXD	Reserved	Serial port receiving data pin (for upgrading program)

Mechanical Dimensions of Walkie Talkie Module DMR828S

DMR828S : 2W DMR Tier II Walkie Talkie Module With AMBE++

Features of Walkie Talkie Module DMR828S

Applications of Walkie Talkie Module DMR828S

We take your privacy very seriously