8000bps RS485 Radio Modem
- Payment Type:
- T/T
- Incoterm:
- FOB
- Min. Order:
- 2 Set/Sets
- Min. Order:
- 2 Set/Sets
- Delivery Time:
- 9 Days
- Transportation:
- Ocean, Land, Air
- Port:
- Shenzhen
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Contact Now| Place of Origin: | China |
|---|---|
| Productivity: | 10000 sets / year |
| Supply Ability: | 20000 sets / year |
| Payment Type: | T/T |
| Incoterm: | FOB |
| Certificate: | SO9001 certification |
| Transportation: | Ocean,Land,Air |
| Port: | Shenzhen |
The GD480
is an 8kbps air rate radio modem with RS-485 serial interface. It provides reliable long range data
transportation for communicating with the devices they are connected with.
The GD480 industrial radio modems encode and transmit data at source end while receive and decode the data at destination end. They use radio waves for data transmission and give users a lot of advantages over the wired data transfer. It is used in narrowband telemetry, alarm and data transfer applications and meets both the technical and economical requirements.
Specifications
1. General
(1) OPERATINGFREQUENCYRANGE: 136-174MHz
(2) Number of channels: 16
(3) ANTENNA IMPEDANCE: 50
Ohm unbalanced
(4) OPERATING TEMPERATURE: -40
to +70℃
(5) FREQUENCY STABILITY TCXO:
±2.0ppm
(6) OPERATION VOLTAGE RANGE: 12V (11V to 14V) DC
(7) STAND-BY
CURRENT: 90mA
2. TRANSMITTER
(1) RF OUTPUT POWER: 25W/8W/5W/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) : less than 0.2uV
(4) SQUELCH SENSITIVITY: 0.1uV to 1uV programmable
(5) ADJACENT CHANNEL SELECTIVITY: greater than –65dB
(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
(9) SQUELCH SENSITIVITY: 0.3uV
3. Data and Interface
(1) MODULATION: MSK
(2) AIR RATE: 8000 bps programmable
(3)Data interface parity: 8000/4800/2400/1200pbs programmable
(4) INTERFACE DATA BIT: 8 bit
(5) INTERFACE PARITY BIT: None / Even /
Odd
(6) INTERFACE STOP BIT: 1 / 2 bit
programmable
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