Modem Radio Spread-Spectrum 900 MHz 1 W Campbell Scientific RF451

Thương hiệu: Campbell Scientific | Tình trạng: Còn hàng
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RF416 2.4 GHz Spread-Spectrum Radio

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Modem Radio Spread-Spectrum 900 MHz 1 W Campbell Scientific RF451


The RF451 is a powerful 900 MHz point-to-multipoint serial radio that is well suited for wireless networking with PakBus dataloggers that are located miles apart. The RF451 is a 902 to 928 MHz frequency-hopping spread-spectrum radio. The radio features high noise immunity, fast serial data transfer speeds, and the maximum transmit power allowed by the FCC in an effort to provide reliable, hassle-free operation.

Constructing a network using RF451 radios is a simple, easy-to-do configuration process. To construct a network, connect one radio to a PC and configure it as the master radio. Then connect a second radio to a datalogger. The link can be treated as a high-speed, multi-drop serial connection.

Benefits and Features

  • Does not require individual operational license in several regions around the world

  • Long-distance, high-speed, serial communication with battery-operated stations

  • Each radio capable of performing master, remote, or repeater role

  • Remote diagnostics and setup possible with diagnostics cable and software

  • Compatible with existing RF450 and FreeWave FGR radio networks

Detailed Description

The RF451 is a frequency-hopping spread-spectrum radio, capable of operating between 902 to 928 MHz and transmitting with up to 1 Watt (30 dBm). The specific frequencies used may be selected when operating outside the US and Canada to meet local regulations. Additionally, the RF power output may be adjusted to as low as 10 mW via software.

Typical communication distances are greater than 4 miles with up to 60 miles achievable under ideal conditions. Extended communication distances are possible using repeaters.


Radio Type

Frequency Hopping Spread Spectrum (FHSS)


902 to 928 MHz

Power Output

10 to 1,000 mW (user-selectable)


2 level GFSK

Data Rate

115.2 or 153.6 kbps (selectable speeds)

Occupied Bandwidth

142 kHz (applicable to FCC ID KNYAMM0921TT)

Hopping Patterns

15 per band, 105 total (user-selectable)

Hopping Channels

50 to 111 (user-selectable) applicable to FCC ID KNYAMM0921TT

Frequency Zones


Receiver Sensitivity

  • -108 dBm at 115.2 kbps (for 10-4 BER)

  • -103 dBm at 153.6 kbps (for 10-4 BER)

IF Selectivity

40 dB (at fc ± 230 kHz)

Receiver Selectivity

50 dB (at 896 MHz, 935 MHz)

Error Detection

32-bit CRC (retransmit on error)

Data Encryption

proprietary spread-spectrum technology

Link Throughput

115.2 kbps (maximum)

Antenna Connector

Reverse Polarity SMA (RPSMA) jack


DB9 M, SDC 7/8/10/11 device



Operating Temperature Range

-40° to +75°C

Relative Humidity

0 to 95% RH (non-condensing)

Compliance Information


  • 2329B-AMM0921TT (Industry Canada ([IC])

Current Required

  • Transmit: 650 mA (@ 12 Vdc)

  • Receive: 40 mA (@ 12 Vdc)

  • Idle: 15 mA (@ 12 Vdc)

  • Sleep: 6 mA (@ 12 Vdc)

Communication Ports

  • RS-232 9 pin D male

  • CS I/O 9 pin D male

  • USB Type B jack


13.61 x 7.01 x 2.74 cm (5.36 x 2.76 x 1.08 in.)


0.18 kg (0.4 lb)


Input Voltage

7 to 28 Vdc

Powered Over

CS I/O or barrel plug


Barrel plug, center positive 12 V (used to connect the 14291 Field Power Cable or 15966 AC adapter)



Used for connection to computer for network communications or device configuration. Does not supply enough power for normal operation; RF451 must be powered through DC barrel plug or CS I/O.


USB standard B (device only)



RF451 900 MHz Spread-Spectrum Radio


RF451 Spread Spectrum Radio

Technical Papers

Line of Sight Obstruction

The Link Budget and Fade Margin

Weatherproofing Exterior Antenna Connections


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