0-1200bps 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 |
GrandComm's GDM412 is a half-duplex radio modem with over-the-air data rate 0-1200bps. It operates in transparent transfer mode and is compatible with the most widely used RS- 485 serial interfaces.
Setting up a local data transfer network is quick and cost effective with these radio modems compared with traditional wired connections. It can be used in a number of applications, including remote control of irrigation systems, environmental monitoring, , remote control of water distribution, and remote reading (meters like gas, electricity, heat)
Specifications
1. General
(1) Operating frequency range: 220MHz-240MHz
(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: ±2.0ppm
(7)OPERATIONVOLTAGERANGE: DC 11V to 14V ( Typical 12V )
(8) STAND-BY CURRENT: 85mA
2. TRANSMITTER
(1) RF OUTPUT POWER: 1.5W to 10W 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: FSK
(2) AIR RATE: 0-1200 bps programmable
(3)INTERFACE BAUD RATE: 1200bps /2400bps programmable
(4) INTERFACE DATA BIT: 8 /7bit
(5) INTERFACE PARITY BIT: None / Even / Odd
(6) INTERFACE STOP BIT: 1/2bit
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