Payment Type: | T/T |
---|---|
Incoterm: | FOB |
Min. Order: | 2 Set/Sets |
Delivery Time: | 9 Days |
Basic Info
Model No.: GDW280
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
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
CONTACT US
Shenzhen PuFang Technology Co., Ltd.
Address: 916, Time building, Tian An Cyber Park, Futian, Shenzhen, China,Shenzhen,Guangdong
Contact Person: Antony Lee
Phone:86-755-83476931
Fax:86-755-83475106