GD4800 RS232 radio modem

Basic Info

Application: Industrial, Civilian

Certification: ISO

Style: Sky Wave

Condition: Used

Standard: Standard

Screen: With Screen

Additional Info

Packaging: Environmentally friendly paper packaging

Productivity: 10000 sets / year

Brand: PuFangTech

Transportation: Ocean,Land,Air

Place of Origin: China

Supply Ability: 20000 sets / year

Certificate: SO9001 certification

Port: Shenzhen

Product Description

GD4800 radio modems transfer data wirelessly across a range of up to tens of kilometers. Private radio networks can be easily created with these radio modems. Private radio networks are used in many critical industrial applications where real-time data communication is needed. Radio modems use radio waves for data transmission and they provide users with a lot of advantage over the wired data transfer.

With the included configuration software each RS232 radio modem can be configured with custom data settings which includes baud rates, parity bit, stop bit and channel frequency. GD4800 are perfect for remote irrigation control, monitoring, and last-mile links to your irrigation system.

Specifications

1. General

   (1) Operating frequency range: 150 MHz to 174MHz ,150MHz-174MHz

(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:   ±2.5ppm

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

   (8) STAND-BY CURRENT: 90mA

2. TRANSMITTER

   (1) RF OUTPUT POWER: 1.5W/5W/8W/10W/ 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: 4800bps bps programmable

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

   (4) INTERFACE DATA BIT: 8 /7bit

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

   (6) INTERFACE STOP BIT: 1/2bit