This product is no longer available and has been replaced by: RF451. Some accessories, replacement parts, or services may still be available.
RF450 900 MHz 1 W Spread-Spectrum Radio


The RF450 is a frequency-hopping, spread-spectrum radio that operates within the 902 to 928 MHz license-free band. This 1 W radio provides a solution for wireless network communications over longer distances (13 to 60 miles, depending on antenna and line-of sight). Designed specifically for our PakBus® dataloggers, the RF450 works particularly well in point-to-multipoint PakBus networks.

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Benefits and Features

  • Individual FCC license not required
  • Maximum transmission distance of 60 miles, and realistic reliable transmission distance of approximately 13 miles
  • Low current drain
  • Wide operating temperature range
  • High data transfer speeds
  • High noise immunity—superior performance in noise congested environments
  • Error Free Communications—32 bit Cyclical Redundancy Checking (CRC) with automatic retransmission
  • Ability to have stand-alone RF router/repeaters (up to 8 repeaters)
  • Real time remote diagnostics and setup, transparent to network communications


Detailed Description

The RF450 consists of a radio module manufactured by FreeWave Technologies and a Campbell Scientific interface board. It reduces susceptibility to RF interference from other spread spectrum devices by providing user-selectable frequency hopping patterns.

Spread spectrum radios spread the normally narrowband information signal over a relatively wide band of frequencies. This process allows communications to be more immune to noise and interference from RF sources such as pagers and cellular phones.


Operating Frequency 902 to 928 MHz
Radio Type Frequency Hopping Spread Spectrum (FHSS) Transceiver
FCC ID KNY-6231812519
Canada ID 2329B-DGR09RAS
Power Output 5 mW to 1 W (user selectable)
Transmit Range Maximum transmission distance of 60 miles, and realistic reliable transmission distance of ~13 miles. (All transmission distances assume line-of-sight and appropriate antenna; line-of-sight obstructions, RF interference, and antenna type affect transmission distance.)
Modulation 120 or 170 kbps (GFSK)
Occupied Bandwidth 230 kHz (at 60 dB)
Channel Spacing 230 kHz
Hopping Patterns 15 per band, 105 total (user selectable)
Hopping Channels 50 to 112 (user selectable)
Hopping Bands 7 (user selectable)
Frequency Zones 16 (7 channels per zone)
Receiver Sensitivity
  • -108 dBm (for 10-6 BER)
  • -110 dBm (for 10-4 BER)
Receiver Selectivity
  • -20 dB (at Fc ±115 kHz;)
  • -60 dB (at Fc ±145 kHz)
System Gain 140 dB
Error Detection 32-bit CRC (retransmit on error)
Data Encryption Substitution, dynamic key
Link Throughput 115.2 kbps (maximum)
Data Interface Protocol CS I/O, RS-232, DCE, ME and SDC (user selectable)
RS-232 Baud Rate 1200, 4800, 9600, 19.2k, 34.4k, 57.6k, or 115.2k bps (user selectable)
RS-232 Connector 9-pin D Female (4 wire: Tx, Rx, CTS, GND)
CS I/O Connector 9-pin D Male (Newer dataloggers provide power to the radio on the CS I/O connector; dataloggers purchased before December 1997 require the #14291 Field Power Cable.)
Antenna Connector Type SMA Female
Power Connector Barrel plug, center positive 12 V (used to connect the 14291 Field Power Cable or 15966 AC adapter)
Input Voltage 7 to 28 Vdc
Operating Temperature Range -40° to +75°C
Relative Humidity 0 to 95% RH (non-condensing)
  • 3.66 x 8.05 x 14.48 cm (1.44 x 3.17 x 5.7 in.) without mounting plate
  • 3.66 x 8.05 x 19.05 cm (1.44 x 3.17 x 7.5 in.) with mounting plate
Weight 0.3 kg (0.7 lb)

Average Current Drain @ 12 Vdc

Sleep 7 mA
Idle 22 mA
Receiving 76 mA
Transmitting 500 mA


Other Spread Spectrum Radios

The RF450 can be used in networks containing FGR-115 radios. Campbell Scientific does not recommend using the RF450 with our RF401-series radios or RF430-series radios.

Datalogger Considerations

Compatible Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR7X CR9000X CR6
* # #†

The internal radio of the CR200(X)-series dataloggers should not be used with the RF450.

#The RF450 does not support a connection with more than one CR5000 or CR9000X datalogger, because the host RF450 radio does not support slave switchable addressing and our CR5000 and CR9000X dataloggers do not have PakBus routing protocol.

Although the CR9000X is compatible, the RF450 does not support its fastest communication rates, and therefore may not be practical for many CR9000X applications.

Enclosure Considerations

A desiccated, non-condensing environment is required. The RF450 includes built-in keyhole flanges for mounting to the backplate of a Campbell Scientific enclosure.

Compatible Enclosures

ENC10/12 ENC10/12R ENC12/14 ENC14/16 ENC16/18


RF450 OS v.02 (415 KB) 07-31-2013

Current RF450 firmware. The Device Configuration Utility is used to update the firmware in the RF450.

View Update History

Device Configuration Utility v.2.17 (46.4 MB) 02-13-2018

A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.

Supported Operating Systems:

Windows 10, 8.1, 8, and 7 (Both 32 and 64 bit)

View Update History

Frequently Asked Questions

Number of FAQs related to RF450: 6

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  1. There are many cavity- and notch-type filters available from third-party manufacturers.

  2. No. They do not use the same over-the-air communications protocol. In fact, unless extra steps are taken, the two models will cause interference with each other.

  3. Yes. This type of connection is called a PakBus network. The intermediate CR1000 needs to be enabled as a router, and a suitable telemetry link needs to exist between the two CR1000 dataloggers.

  4. Antenna selection depends on multiple criteria: 

    • Consider how many stations a particular station needs to communicate with. For remote stations in communication with only one repeater or base station, a directional or Yagi antenna may be an appropriate choice. In contrast, repeater stations that receive data from many different locations will probably require an omnidirectional antenna. 
    • Consider if a high-gain antenna is needed to overcome the path between two points. Higher-gain antennas are larger and more expensive. 

    To help with antenna selection and site placement, consider renting and using a demo kit to test the pathway quality. Campbell Scientific offers a 900 MHz demo kit for the RF401, RF430, CR206X, and AVW206, as well as a demo kit for the RF450. Contact Campbell Scientific for assistance.

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