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This radio modem is for PakBus networks with UHF/VHF radios. The versatile RF500M can serve as a field modem connected to... |
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This RF base station is for PakBus networks with UHF/VHF radios. The RF500B resides at the computer site and serves as... |
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The RF310 is a Midland VHF transceiver that supports the 148 to 174 MHz frequency range. This rugged transceiver can support... |
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The RF312 is a Midland UHF transceiver that supports the 440 to 470 MHz frequency range. This rugged transceiver can support... |
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The RF313 is a Midland UHF transceiver that supports the 400 to 430 MHz frequency range. This rugged transceiver can support... |
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The RF310M Modem provides the communication interface between one of our dataloggers and a Maxon/Midland radio. The modem is typically powered... |
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Located at base station computer, the RF310B Base Station serves as link to field stations and repeaters. This base station is... |
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The RF232A includes a 110/220 Vac to 12 Vdc transformer, RF95A modem, RS-232 port, and internal mount for a radio. The... |
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This RF modem will continue to be available, but Campbell Scientific recommends the RF500M modem for RF networks that use PakBus... |
Campbell Scientific's narrow-band RF systems consist of a radio modem and a low-powered transceiver at the remote station(s), and a transceiver connected to a base station at the computer site. Up to 254 stations can be interrogated over a single UHF or VHF frequency. Stations with compatible radio and radio modem can serve as repeaters to extend the line-of-sight transmission of the base station. Transmission distance is typically up to 25 miles between stations (line-of-sight).
An FCC-approved frequency assignment is required before radios and antennas can be ordered. Within a typical RF telemetry network, field sites use a directional "Yagi" antenna, repeater sites use omnidirectional antennas, and the base station may use either an omnidirectional or Yagi antenna depending on the geographic distribution of the network.
A typical field station contains a datalogger and is located at the measurement site. Repeater stations act as a communication relay between stations that cannot communicate due to distance or obstacles. A repeater station can be upgraded to a field station with the addition of a datalogger and sensors.