RETIRED ›
This product is no longer available and has been replaced by: RF323,RF321,RF322. Some accessories, replacement parts, or services may still be available.
RF304 UHF Radio Transceiver

Overview

The RF304 is a DRL UHF radio transceiver that is programmed to an exact user-specified frequency by Campbell Scientific using special software.

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The RF300-series are radio transceivers used in Campbell Scientific radiotelemetry networks. The following table shows the frequency ranges assigned to each model.

Model Type Frequency
RF300 VHF 150 to 174 MHz
RF301 VHF 132 to 150 MHz
RF302 UHF 450 to 470 MHz
RF303 UHF 403 to 419 MHz
RF304 UHF

419 to 435 MHz
435 to 451 MHz
464 to 480 MHz
480 to 496 MHz
496 to 512 MHz

These transceivers meet NTIA narrowband and FCC re-farming requirements for transmission.

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Detailed Description

The RF304 is a Dataradio 3412 UHF radio transceiver that is programmed to an exact user-specified frequency by Campbell Scientific using special software.

Besides the radio, each field station and repeater station must also have an RF500M Radio Modem or RF95(A) Radio Modem; base stations need an RF500M radio modem, RF500B base station, or RF232(A) base station.

Specifications

Power Output 5 W (at 13.3 V nominal)
Frequency Control Synthesized
Channel Spacing 12.5/25 kHz
Operation Voltage
  • 13.3 Vdc (nominal)
  • 10 to 16 Vdc (operational)
Current Drain
  • 50 mA (quiescent)
  • ~ 1.5 A (while transmitting)
Operating Temperature -30° to +60°C
Humidity 95% maximum RH at 40°C (non-condensing)
Dimensions 11.7 x 8.4 x 5.6 cm (4.6 x 3.3 x 2.2 in.)

Compatibility

Radios, Radio Modems, and Radio Base Stations

The RF304 is compatible with the RF500M radio modems, RF500B base stations, RF95(A) radio modems, RF232(A) base stations, E.F. Johnson-series radios, and P50-series radios. The RF304 is NOT compatible with the RF310M radio modem, RF310B Base Station, and RF310-series radios.

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000

Frequently Asked Questions

Number of FAQs related to RF304: 1

  1. It is possible to connect two antennas to a single radio via a properly specified (operating frequency and power handling capability) two-way, 50 ohm RF power divider. One example of this type of power divider is offered by Pasternack. Note that using a device like this will induce additional losses into the system (3 to 4 dB, typically).

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