140-400 Spread Spectrum Radio

Ideal for remote weather station applications
Long range, low power, low cost, wireless serial communication
Plug-and-Play (no configuration required)
Transparent operation supports existing software and systems
Retries and acknowledgements for guaranteed packet delivery
Low power modes include shutdown pin, cyclic sleep, and serial port sleep for current consumption as low as 1 mA
Signal strength register for link quality monitoring and debugging

The Model 140-400 Spread Spectrum Radio was designed to provide end users with an easy to install wireless serial communication link. Used with the WS-16 Data Logger and a high-gain antenna, it provides data communication up to 20 miles. When configured as an addressable unit, it is suitable for use in a network of up to four weather stations.

Functionality is provided by the serial connection, power switch, indicator lights, high quality antenna, mounting plates, and power source inputs.

The 140-400 has the best sensitivity in the industry, making it one of the longest range low-cost radio modems available to date. It provides high performance and dependable operation.

The 140-400 requires no configuration to operate, simply plug-and-communicate. Output serial data from any RS232 port into the radio to send FCC and ETSI approved, frequency hopping spread spectrum data to the receiver.

Specifications

General
Frequency: 902-928 MHz
Spreading spectrum type: Frequency hopping, direct FM
Serial data interface: RS232/422/485
I/O data rage: Software selectable 1,200-57,000 bps

Power Requirements
Supply voltage: 7-18 Vdc
Transmit current: 200 mA
Receive current: 70 mA
Power down current: < 1 mA

Physical Properties
Enclosure type: Extruded aluminum, black anodized
Enclosure size: 2.75" x 5.50" x 1.124" (7.90 x 13.90 x 3.80 cm)
Weight: 7.1 oz (200 g)
Operating temperature: -40° to +85° C

Antenna
Type: 1/2 wave dipole whip
Gain: 2.1 dB
Length: 6.75" (17.1 cm)
Impedance: 50 ohms unbalanced

Performance
Indoor/Urban range: Up to 1,500' (457 m)
Outdoor LOS range: Up to 7 mi (11 km) with dipole, up to 20 mi (32 km) with hi-gain

Ordering Information

140-400 900 MHz Spread Spectrum Radio (2 required)
includes:
Stand-Alone Radio Modem
1/2 Wave Dipole Antenna
DB-9 Male to DB-9 Female Serial Cable
Null Modem Adapter
Power Supply

140-400A8 Antenna 8 dB
140-400A11 Antenna 11dB
140-400A15 Antenna 15 dB
140-400C20 20' Antenna Cable
140-400C40 40' Antenna Cable

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