16000bps RS232 Radio Modem

GD16000 is an air rate of 16000bps radio modem with 25KHz channel spacing that provides reliable, real-time data communications. The radio modem is suitable for narrow band telemetry, alarm and data transfer applications.

The radio modem works in store and forward mode and therefore any radio modem in a network can be used either as a master station or as a slave station. The radio unit can operate as a transparent radio link, and is ideal for most types of wireless serial communication, essentially replacing a wire with classic RS-232 based protocol. 

Specifications

1. General

   (1) Operating frequency range: 90 MHz or 70 MHz

(2) Channel spacing: 25KHz.

   (3) Number of channels: 60

   (4) ANTENNA IMPEDANCE: 50 Ohm unbalanced

   (5) OPERATING TEMPERATURE: -40 to +70℃

   (6) FREQUENCY STABILITY TCXO:   ±2.0ppm

   (7)OPERATIONVOLTAGERANGE: DC 11V to 14V ( Typical 12V )

   (8) STAND-BY CURRENT: 85mA

2. TRANSMITTER

   (1) RF OUTPUT POWER: 25W programmable

   (2) OUTPUT 2ND HARMONIC: less than –65dB

   (3) SPURIOUS EMISSIONS:  less than 0.25uW (30MHz to 1GHz)

   (4) MAXIMUM FREQUENCY DEVIATION: ±5KHz

   (5) REFERENCE OSCILLATOR: TCXO

   (6) RF IMPEDANCE: 50 Ohm unbalanced

   (7) CURRENT DRAIN: 5.0A @25W output power

   (8) FM HUM AND NOISE RATIO: greater than –50dB

   (9) AUDIO FREQUENCY DISTORTION: 3% 1KHz for 3KHz deviation

   (10) AUDIO FREQUENCY RANGE: 300Hz to 3400Hz ±2dB

   (11) TRANSMITTER ATTACK TIME: less than 10ms

2. RECEIVER

   (1) TYPE OF RECEIVER:Crystalcontrolled double, super heterodyne

   (2) INTERMEDIATE frequency: 45MHz(1st IF), 455KHz(2nd IF)

   (3) SENSITIVITY: Better than 0.2uV @12dB SINAD

   (4) SQUELCH SENSITIVITY: 0.1uV to 1uV programmable

   (5) ADJACENT CHANNEL SELECTIVITY: greater than –70dB

   (6) SPURIOUS AND IMAGE REJECTION: greater than –65dB

   (7) OUTPUT AUDIO DISTORTION: 3% at 1KHz for ±5KHz deviation

   (8) FM HUM AND NOISE RATIO:  greater than 40dB

3. Data and Interface

   (1) MODULATION: GMSK

   (2) AIR RATE: 16000 bps programmable

   (3)INTERFACE BAUD RATE: 1200bps /2400/4800bps/9600bps/19200bps/16000bps programmable

   (4) INTERFACE DATA BIT: 8 /7bit

   (5) INTERFACE PARITY BIT: None / Even / Odd

   (6) INTERFACE STOP BIT: 1/2bit