A small size wireless data transceiver operating at 400 MHz frequency band with programmable air rate of 4800, 2400 and 1200 bps. Maximum RF output power is 7.5 watts and can be programmed from 7.5 watts down to 1 watt with five levels. It is easy to integrate for system integrator.

◆ General

-Frequency Range	-400 - 430MHz, 450 - 470MHz
-Channel Capacity	-60
-Channel Spacing	-25KHz
-Frequency Stability	-±2.0ppm (-40～+70℃)
-Operating Voltage	-DC 11V to 14V ( Typical 12V )
-Current Drain	-Standby:  <80mA -Receive:  <100mA -Transmit @ 7.5W:  <1.8A @12V power supply -Transmit @ 1.5W:  <0.9A @12V power supply
-Antenna Impedance	-50 ohm unbalanced
-Dimensions (WxHxD)	-125mmx76mmx34mm
-Weight	-370g
-Operating Temperature	--40℃ - +70℃

◆ Receiver

-Type of Receiver	-Double, super heterodyne
-Intermediate Freq	-45MHz(1st IF), 455KHz(2nd IF)
-Sensitivity	-0.2 μV @12dB SINAD
-Squelch Sensitivity	-0.25uV
-Adjacent Channel Selectivity	-greater than –70dB
-Spurious and Image Rejection	-greater than –70dB
-Intermodulation	-65dB
-Output Audio Distortion	-3% at 1KHz for ±3KHz deviation

◆ Transmitter

-RF Output Power	-7.5W, 6W, 4W, 2W and 1W, programmable for GD400B-7.5 -1.5W, 1W, 0.6W, 0.3W and 0.1W, programmable for GD400B -1.5
-Maximum Frequency Deviation	-±5KHz
-Output  Harmonic	-less than –65dB
-Spurious Emissions	-less than 0.25uW (30MHz to 1GHz)
-Distortion	-≤2.5％
Transmitter Attack Time	<5ms

◆ Data and Interface

-Modulation	-MSK
-Air Rate	-4800, 2400 and 1200, programmable
-Interface Baud Rate	-300 - 38400bps programmable
-Interface Data Bit	-8 or 7 bits programmable
-Interface Parity Bit	-None / Even / Odd programmable
-Interface Stop Bit	-1 bit or 2 bits programmable

Serial Port Utility is a free communication software for serial port. Serialport Utility makes it more efficient for development of hardware-software application. It can send and receive data in high speed. Data can be viewed in Text, Hex and decimal format. Data can be sent automatically with flexible auto sending rules.

◆ Configuration

1. Power Cord

2. 232 Interface cables (For RS-232 interface radio modem)  or

__485 Interface cables (For RS-485 interface radio modem)

◆ Options

1. Antennas

2. RF Cables

3. Power Supply

4. Coaxial Lightning Arrestor

5. Handset

6. Programmer

7. Interface Adapter

	Model	Frequency Range	Air Rate	RF Output Power	Dimensions
Current	GD400B	400 - 470MHz	4800/2400/1200bps	7.5W / 1.5W	12.5x7.6x3.4cm
Similar Model	GD400H	400 - 470MHz	4800/2400/1200bps	25W / 8W	14.5x10.9x4.1cm
	GD400BH	400 - 470MHz	9600/19200bps	7.5W / 1.5W	12.5x7.6x3.4cm
	GD230B	223 - 235MHz	4800/2400/1200bps	10W / 1.5W	12.5x7.6x3.4cm
	GD150B	136 - 174MHz	4800/2400/1200bps	10W / 1.5W	12.5x7.6x3.4cm