Wireless Modem With RS232 At 8000bps 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 |
In SCADA systems, wireless solution is an effective way to extend product lines without drastically redesigning existing products and systems. When wireless modems are used as the communication link, existing products and systems may be extended with no disruption to existing services.
The GDW280 is an 8000bps air rate wireless modem with RS232 serial interface port. Its wireless RS-232 link will deliver data in the same form as was received so as to appear transparent on the network with a very small addition of latency.
Specifications
1. General
(1) Operating frequency range: 450 to 470MHz
(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)OPERATIONVOLTAGERANGE: 12V DC ( 11Vdc to 14.5V DC)
(8) STAND-BY CURRENT: 85mA
2. TRANSMITTER
(1) RF OUTPUT POWER: 25W /10W/8W/1.5Wprogrammable
(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: 6.0A @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 10 ms
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: MSK
(2) AIR RATE: 8000bps programmable
(3) INTERFACE BAUD RATE: 1200/4800/8000bps programmable
(4) INTERFACE DATA BIT: 8 / 7 bit
(5) INTERFACE PARITY BIT: None / Even / Odd
(6) INTERFACE STOP BIT: 1 / 2 bit
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