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SD-171EX VHF (148-174MHz) RF Link Module

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Contact us at Maxon Australia on +61 2 8707 3000 for Pricing & Availablity
SD-171EX V

 Product Description

The Maxon data/telemetry radios are designed to meet the needs for a variety of wireless applications.

Adjustable power output settings provide the optimum power required. The SD-170EX Series incorporates the most often requested mechanical footprint, DE9 male connector, and BNC antenna connection. The LED provides you instant status of the radio. The die cast aluminum cabinet/lid provides resistance to RF interference; and gives exceptional environmental durability in the most extreme conditions.

Whether a new or legacy system, the Maxon SD-170EX Series is the choice of OEM and end users worldwide.

Maxon has been a trusted name in the data/telemetrymarket for over 20 years.

General Features

  • LED Status Indicator
  • DE9 Male Connector
  • CTCSS/DCS Encode/Decode
  • Available VHF/UHF Bands
  • 16 Channels (Dip Switch select)
  • 5/1 Watt Power Output
  • 12.5/25 kHz Channel Bandwidth


  • Channel Bandwidth 12.5/25kHz
  • PLL Channel Step 2.5kHz, 5kHz, 6.25kHz
  • Power requirement 9-18 V DC, 12V Nominal
  • Current Drain Tx Hi: 2.0, Tx Lo: 1A Std 65mA
  • Temperature Range -22˚ to 140˚F-30˚ to 60˚C
  • Weight 267g
  • Lock time <10min
  • LED Status Yellow - Busy
  • Green - Receive/Decode
  • Red - Transmit
  • TX Time out timer
  • Carrier Detaect
  • Busy Channel Lock out
  • BNC Female Antenna Connector
  • Squelch - Software aligned


  • Output Power VHF/UHF 5/1 Watt
  • FM Hum & Noise 40dB (12.5kHz, 40dB (25kHz)
  • Modulation Sensitivity 100mV RMS (60% peak dev)
  • Spurious Emissions -36dBm
  • Frequency Deviation Peak±2.5min, ±1.9kHz (12.5kHz) Peak±5.0min, ±3.8kHz (25kHz)
  • Adj Channel Power 70dBc(25kHz) 60dBc
  • (12.5kHz)
  • Audio Response +1, -3dBc from 6dBc per
  • octave pre emphasis characteristics from 30030000Hz


  • Sensitivity 0.30μV (12.5 kHz), 0.28μV (25 kHz)
  • Selectivity 65dB (12.5 kHz), 70dB (25 kHz)
  • Intermodulation 70dB
  • Spurious Emissions -57dBm (9kHz - 1GHz), -47dBm (1GHz - 4GHz)
  • RX Hum and Noise 40dB (12.5 kHz), 40dB (25 kHz)
  • Spurious and Harmonic 65dB
  • Receiver Response Time
  • Squelch Attack Time <20/40 ms (RSSI/Analog) RF Level <10/30 ms (RSSI/Analog) RF Level +20dB
  • Squelch Decay Time 5 ms Min., 20 ms Max.
  • Audio Output Power 0.5 Watt


  • 117x62x35mm Approvals
  • CE • FCC

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