Modem Radio SRD860 868 MHz Campbell Scientific RF422

Thương hiệu: Campbell Scientific | Tình trạng: Còn hàng
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RF422 868 MHz SRD860 Radio

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Modem Radio SRD860 868 MHz Campbell Scientific RF422


The RF422 is an 868 MHz SRD860 radio designed to provide license-free operation for wireless serial communications in Europe. The RF422 transmits data at 10 kbps with a maximum power of 25 mW, and it employs listen-before-talk (LBT) and adaptive-frequency-agility (AFA) to provide a robust link of up to 5 km (line-of-sight). The RF422 supports point-to-point and point-to-multipoint datalogger communications and PakBus repeater operation.

The RF422 is part of the RF407-series of radios that includes:

  • RF407: North America (FCC & IC), 902 to 928 MHz

  • RF412: Australia (ACMA RCM), 915 to 928 MHz

  • RF422: Most of Europe and some of Asia (ETSI), 863 to 870 MHz

Benefits and Features

  • Does not require individual operational license in Europe

  • Robust serial communication, optimized for PakBus networks

  • Low power (< 2 mA idle) during periods of inactivity

  • Supports point-to-point with RF retries and point-to-multipoint operations

  • Remote diagnostics using PakBus node operations

  • Operational power can be supplied over USB when attached to PC


Radio Type



See REC70-03E, CEPT recommendation on the use of SRD.


Listen before talk (LBT) and automatic frequency agility (AFA) to comply with ETSI duty cycle requirements. Radio communication effective duty cycle = (number of channels * 100) / 3600.

Channel Capacity

30 channels (default), software configurable for the purpose of meeting local regulations; 10 sequences for reducing interference through channel hop.


863 to 870 MHz

Power Output

2 to 25 mW (software-selectable; assuming 2 Bi antenna gain)

Receiver Sensitivity

-106 dBm

Data Rate

10 kbps

Link Throughput

8 kbps

Antenna Connector

Reverse Polarity SMA (RPSMA) jack


Red TX/PWR and green RX

RS-232 Baud Rate

1200 to 115200 bps

CS I/O Modes

SDC 7, 8, 10, 11, and ME master


9 to 16 Vdc

Power Connector

2.5 mm dc power jack

Operating Temperature Range

-40° to +70°C


  • CE

  • ETSI EN 300 220-2 V2.3.1

Current Required

  • Transmit: 25 mA (25 mW TX Power)

  • Receive: 15 mA

  • Sleep: 0.5 mA (depending on power saving mode)

Communication Ports

  • RS-232 9-pin D female

  • CS I/O 9-pin D male

  • USB Type B jack


11.1 x 6.9 x 2.7 cm (4.4 x 2.7 x 1.1 in.) 
Dimensions are from the tip of the antenna connector to the other side of the case, and from the bottom of the case to the top of the DB9 connector jack screw. The width includes the thickness of the screw heads on the screws that hold the case together.


  • 136 g (4.8 oz) without "Ships With" items

  • 283.5 g (10 oz) with "Ships With items

LBT+AFA Performance

Channel Spacing

100 kHz

Receiver Bandwidth

150 kHz

Modulation Bandwidth

< 300 kHz

LBT Threshold

< -88 dBm

TX on Time

< 1 s



RF422 868 MHz Radio


RF407-Series Spread Spectrum Radios

Technical Papers

Line of Sight Obstruction

The Link Budget and Fade Margin


RF422 EU Declaration of Conformity

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