Wireless Modem Wth RS485 At 4800bps Air Rate
- 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 |
GDW448 is an half-duplex wireless modem that operates on VHF or UHF bands. Channel spacing 12.5 and 25 kHz are available, with over-the-air data rates 4800bps. It provides high available RS485 connectivity with reliable radio technology and switchover functionality. Support for serial components is ensured by serial modes of operation as well as protocol conversions.
GDW448 can meet the requirements of mission critical connectivity: high availability, long-range connectivity, easy and error-free deployment. Configuration is easy with downloadable configuration software.
Specifications
1. General
(1) OPERATINGFREQUENCYRANGE: 150-174MHz
(2)Channel spacing:12.5 and 25 kHz
(3) Number of channels: 60
(4) ANTENNA IMPEDANCE: 50 Ohm unbalanced
(5) OPERATING TEMPERATURE: -40 to +70℃
(6) FREQUENCY STABILITY TCXO: ±2.0ppm
(7) OPERATION VOLTAGE RANGE: 12V (11V to 14V) DC
(7) STAND-BY
CURRENT: 90mA
2. TRANSMITTER
(1) RF OUTPUT POWER: 5W-25W 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: 4800 bps programmable
(3) INTERFACE DATA BIT: 8 bit
(4) INTERFACE PARITY BIT: None / Even /
Odd
(5) INTERFACE STOP BIT: 1 / 2 bit programmable
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