Wireless modem with 1.5W output power

The GDWP1R is a 1.5 watt data wireless modem that provides long distance and powerful communication links that can carry a variety of traffic and is designed for data transmission and can support selected pre-emphasis, squelch and audio amplifier voice communications. 

Grand's data wireless modems have a UHF radio transceiver designed from the ground up as data radio modems.  At the same time, it has a good low frequency response in radio applications, making it a competitive choice for data applications at speeds from 1200 -19200 bps.

Specifications

1. General 

(1)OPERATINGFREQUENCYRANGE: 136 to 150MHz

(2) Channel spacing: 25 KHz

(3) Number of channels: 16
(4) ANTENNA IMPEDANCE: 50 Ohm unbalanced
(5) OPERATING TEMPERATURE: -40 to +70℃
(6) FREQUENCY STABILITY TCXO:  ±2.5ppm
(7) OPERATION VOLTAGE RANGE: DC 11V to 14V (Typical 12V)
( 8) STAND-BY CURRENT: 110mA
2. TRANSMITTER

(1) RF OUTPUT POWER: 1.5W programmable

(2)RECEIVER ATTACK TIME: 10ms

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

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

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

(6) MAXIMUM FREQUENCY DEVIATION: ±5KHz

(7) REFERENCE OSCILLATOR: TCXO

(8) RF IMPEDANCE: 50 Ohm unbalanced

(9) FM HUM AND NOISE RATIO: greater than –50dB (under normal condition)

2. RECEIVER 
(1) TYPE OF RECEIVER:Crystalcontrolled double, super heterodyne
(2) INTERMEDIATE frequency: 45MHz (1st IF), 455KHz (2nd IF)
(3) SENSITIVITY(12 dB SINAD) : Better than 0.2uV

(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 1 KHz for ±5KHz deviation
(8) FM HUM AND NOISE RATIO:  greater than 40dB

3. Data and Interface 

 (1) MODULATION: GMSK
 (2) AIR RATE: 1200 -19200 bps programmable
 (3) INTERFACE DATA BIT: 8 bit
 (4) INTERFACE PARITY BIT: None / Even / Odd
 (5) INTERFACE STOP BIT: 1 bit