Two-Way Radio Communications and Electronics Specialists



 Vertex Standard Portable Two-Way Radio Selector Page Portables
 Vertex Standard Mobile Two-Way Radio Selector Page Mobiles
 Vertex Standard Repeater Selector Page Repeaters
 Vertex Standard System 600 and VX-1210 HF SSB Radios HF SSB
 Vertex Standard Product Line Photo and Links OptionAcc
 Vertex Standard Two-Way Radio Communications Product Line Photo Vertex
 Two-Way Radio Repair Page Repair
 Yeasu/Vertex Standard Antenna Rotators Rotators
 Vertex Standard VX-Trunk System VX-Trunk
 Vertex Standard Specials and New Products SPECIALS
 Vertex Standard Lowest Price Page LowPrice

 Midland Portable Two-Way Radio Selector Page Portables
 Midland Mobile Two-Way Radio Selector Page Mobiles
 Midland Repeater and Base Station Two-Way Radio Selector Page Base/Rptr

 Maxon Legacy Portable Two-Way Radio Selector Page - Topaz Portables
 Maxon Legacy Mobile Two-Way Radio Selector Page - Topaz Mobiles
 Maxon Repeater Selector Page - Topaz Repeaters
 Maxon Base Station Selector Page - Topaz Bases
 Maxon Legacy Midland RF Data Link Selector Page - Topaz Data
 Radio Selection and Applications Help Page for Maxon, Legacy ProLine, TrueTalk and Midland - Topaz3 Radio Help

 Austin Antenna Products and Information Austin
 Comtelco Two-Way Antenna Products Comtelco


 SCA, Inc. Shimwa  Sceptar UHF/VHF Tone Pager  Sceptar UV
 SCA, Inc. Shimwa  ALPS VHFL Low Band Tone Pager  ALPS VHFL
 Pager Repair Page Repair


 Police/Fire/EMS/Public Safety - Scanner Selector Uniden
 Scanner and Monitor Radio Antenna Information Antennas
 Scanner Repair Information Repair
 Scanner Frequency Selector Page - Scanner Frequencies ScanFreqs
 Scanner Frequency Links Page Links


 CB Radio Selector Page Uniden
 Ranger Communications CB & Amateur Radio Selector Page Wilson
 CB Radio Repair Page Repair
 CB Radio Tune Up / Alignment Page / Peak Tune-Up
 CB & Amateur Radio Antenna Selector Page Antennas
 CB Radio Accessories Selector Page Parts/Acc

 Wilson Antenna Selector Page Antennas
 Wilson Antenna Replacement Parts and Accessories Parts/Acc
 Francis CB antennas Selector Page Francis


 Multec Communications / - How to Order Page FAQs
 Multec Communications / - How to Order Page Ordering
 Multec Communications / Contact
 Multec Communications / - Friends & Members Links Page Links
 Multec Communications / - Table of Contents Contents
 Multec Communications / - Search Page SEARCH
 Multec Communications / - Misc and Used Page Misc/Used
 Multec Communications / - Terms and Conditions Returns
 Multec Communications / - Terms and Conditions TermsCond


Maxon Logo
Midland Two-Way Radio

Maxon Synthesized 5 Watt RF Data Link Radio Telemetry Module

SD-161EV SD-161EU Maxon Synthesized RF Data Link Module

For Guaranteed Lowest Pricing...




Includes: FREE Programming

Lowest Price Guarantee
Visa, MasterCard, Discover and American Express Accepted
***Up to 16 Channels Programmed FREE***

$ Qty
VHF 142-174 MHz
Maxon SD-171EV
12.5/15/25/30 KHz Ch Spacing
16 Channel - 5 Watts

$ Qty
UHF 450-490 MHz
Maxon SD-174EU
12.5/25 KHz Ch Spacing
16 Channel - 5 Watts


Vehicular Tracking and Data

Maxon SD-161 & SD-164 series ACC-515 GPS Receiver in Vehicle

SD-161V SD-161U Series  ACC-515 internal GPS Receiver Board

GPS Receiver Option for
Vehicle Location ACC-515
(internally mounted GPS receiver board)

ACC-160 GPS Antenna by Maxon
ACC-160 GPS Antenna

Maxon Wireless Data Link Modules are FCC certified (pending) for use in the U.S.A. and its possessions.  Maxon's SD-171E & SD-174E Series Data Modules are manufactured under ISO 9002 quality standards and are IC approved (pending) for sale in Canada.

The new Maxon SD-170E Series RF Data Link Telemetry Radio delivers reliable 2-way communication & remote control for a variety of application needs. Available as VHF (SD-171) or UHF (SD-174) with 1 or 5 Watts programmable output and 16 channels. The SD-170 Series provides reliable data or voice communication at all times. Crystal clear audio quality makes the SD-170 Series an ideal radio for golf course and emergency call boxes. When paired with the optional GMSK or FFSK modem board, the SD-170 Series transmits and receives data for wireless security systems, or it can be used in conjunction with police mobile data terminals for license tag checks. The optional GPS receiver turns the RF data radio into an Automatic Vehicle Location system for tracking fleet movement and communicating data directly to a computer


  • Synthesized Frequency Tuning
  • 1 or 5 Watts Programmable
    RF Output Power
  • 148-174 MHz VHF
    450-490 MHz UHF
  • Programmable up to 16 Channels
    (Channel selection via dip switch or
     serial command)
  • CTCSS / DCS Tone Signalling
  • 2-Tone Decode
  • Scan / Power Save
  • LED Status Indicator
    Time-out-timer / Busy Ch Lockout
  • Marked Idle / TX Delay
  • Courtesy Beep
  • Programmable Wide/Narrow Band
  • Operates from 9V to 18 VDC
  • Complies with NTIA Specifications
  • Die-Cast Aluminum Housing
  • Time-Out-Timer Function
  • 15-Pin Interface Connector (DB15)
    (See connector pin-outs below)
  • PC Programming via Software and Cable (optional)

Got a Question?

Main Accessories:

GPS Receiver Option
(SD-171 shown with GPS receiver board installed)

Maxon SD-161 & SD-164 series ACC-515 GPS Receiver

  • Perfect for Vehicle Location and Tracking
  • Relay important data directly to computer

Tough Conditions are No Problem for Maxon RF Data Modules

Tough Conditions?
No Problem for Maxon RF Data Link Modules



 Optional Accessories - Antennas
Model # Description Price

 TB-150BN  6" VHF 148-174 MHz Antenna w/BNC  (uncut)
 TB-450BN  6" UHF 440-470 MHz Antenna w/BNC connector
 ACC-160  GPS Antenna
 Optional Accessories - Signaling
Model # Description Price

 ACC-513  GSMKS 9600 Baud Modem board
 ACC-514  FSSK 4800 Baud Modem board
 ACC-515  GPS Receiver - solder in PCB w/SMA female
 connector- requires GPS antenna (ACC-160 or similar)
 Service Equipment - Programming / Manuals
 ACC-2016E  PC Programming Cable E SERIES
  (Requires  ACC-916E below)


 ACC-916E  PC Programming Software (CD-ROM)  WARNING!
 (Includes Disk & Instructions) E SERIES


 ACC-2016  PC Programming Cable NON-E SERIES
  (Requires  ACC-916 below)
 ACC-916CD  PC Programming Software (CD-ROM)  WARNING!
 (Includes Disk & Instructions)
 SVM-170E  SD-171E / SD-174E Series Service Manual E-SERIES


 680-100-2014  SD-171 / SD-174 Series Service Manual NON-E


 ACC-516  SD-171E / SD-174E Extender Board Service Aid


 ACC-17AH  SD-171E / SD-174E Series Adaptor/Harness
 NOTE: Adapts SD-170E series to SD-170 Series
 Electrical connections - Allows PLUG & PLAY
    Wt    $  Qty

General Specifications  
  Maxon VHF SD-171 Maxon UHF SD-174
Frequency Range 148-174 MHz 450-490 MHz
FCC ID Number pending pending
FCC Parts Parts  22, 74, 90.210
Channels 1 to16 dip switch selectable or external serial command
Channel Spacing 12.5 / 15 / 25 / 30 KHz 12.5 / 25 KHz
Channel Stepping

5.0 / 6.25 / 7.5 KHz

5.0 / 6.25 KHz

Channel Spread 26 MHz 40 MHz
Frequency Stability

2.5 ppm

Operating Temperature

-22 to +140 F (-30 to + 60 C)

Storage Temperature

-40 to +176 F (-40 to + 80 C)

Input Voltage

9V - 18V DC,  13V nominal

Attack Time

RX to TX - 20 ms    /     TX to RX - 20 ms (no power saving)

PLL Lock Time 10 ms
Squelch Attack Time

RF Level @ Threshold - 40 ms  /  RF Level @ Threshold +20dB - 30 ms

Squelch Decay

5 ms min / 20 ms max

Baud Rate GMSK

Up to 9600

Baud Rate FFSK

Up to 4800

Dimensions [HWD]

4-5/16" x 2-5/16" x 1-1/4" [125 x 58 x 32 mm]


8.9 oz [253 gm]


Die-cast Aluminum

IC Certification Number



ANSI/TIA/EIA-603 Receiver Specifications
  Maxon VHF SD-171 Maxon UHF SD-174
Frequency Stability 2.5 PPM
Sensitivity (12dB SINAD) 0.25 uV VHF 0.25 uV UHF
Sensitivity (20dB Quieting) < 0.5 uv @ center channel
Selectivity 70dB (25 KHz) / 65dB (12.5 KHz)
Spurious Rejection




Audio Output

250 mV @ 8 Ohms (filtered)   250 mV RMS @ 10k Ohms (unfiltered)

Audio Distortion

< 5% @ 1 KHz

Hum & Noise

-40 dB

Input Impedance 50 ohms
ANSI/TIA/EIA-603 Transmitter Specifications
  Maxon VHF SD-171 Maxon UHF SD-174
RF Power Output.

1 or 5 Watts programmable

Frequency Stability 2.5 PPM
Modulation 11K0F3E / 16K0F3E  / 19K6F3E
Spurious & Harmonics -60dBc
FM Hum & Noise


Audio Distortion <2% @ rated modulation
Modulation Limiting 2.5 KHz max. [12.5 KHz] ,  5 KHz max. [25 KHz]
Unfiltered Modulation 100 mV RMS (input)  7 mV RMS (filtered mod input)

Data Connector Pin Configuration

Maxon SD-161 & SD-164 series Data Port pin assignments

  1. Data modulation input - Analog input (Nominal modulated level Input - 100 mV RMS)
  2. Data unfiltered output - Analog output (Nominal demodulation output level - 250 mV RMS @10K)
  3. PTT- M level (or RS-232 level with modem option)
  4. Ground (E Version main power: +12V Nominal / D-Shell or case is Ground)
  5. Serial data output for radio control or program - TTL level
  6. Busy detect - TTL level (or RS-232 level with modem option)
  7. Microphone filtered audio input - Analog Input  (Nominal modulated level input - 7 mV RMS)
  8. Serial data input for radio control or program- TTL level
  9. Speaker filtered output - Analog output (Nominal demodulation output level - l V RMS @ 8)
  10. Serial data input for option modem - RS-232 level
  11. Serial data busy for option modem - RS-232 level
  12. Serial data busy for option modem - RS-232 level
  13. GPS data input- TTL level (NMEA 0183 formal)
  14. DGPS data input - TTL level (NMEA 0183 format)
  15. GPS data output - TTL level (NMEA 0183 formal)

Note: Complies with NTIA Specifications
Note: Features and specifications subject to change without notice

Solution Graphics

Visa, MasterCard, Discover and American Express Accepted

Our e-commerce system uses a XRamp
SSL Secure Site protected through

Terms & Conditions
Table of Contents

Copyright 2000-2015  Multec Communications / - All rights reserved. Do not duplicate without the express written consent of Multec Communications.
Shipping & Mail only - Note: returns require a RA# - see RETURNS  before shipping
Address...                      Note: warranty repairs only - see REPAIRS  before shipping

Multec Communications
319 Centre Ave.  #166
Rockland, MA  U.S.A.   02370-2613
781 294-4992 main
781 527-5004 fax (include return email w/fax)

Main 781 294-4992
- calling hours 11-5 EST  Monday-Friday for questions and tech support only...."Out of Area", "Restricted" and "Private Caller" calls may be blocked to avoid phone spam. Note: The main line is often very busy. Please place orders online using our secure e-commerce system. Save time...order online!

If you have questions about ordering please see  ordering information page  first. Phone orders slow processing time, increase inaccuracies and are not recommended.

Email questions or comments at - Email

Note: Not responsible for typographical, photographic or pricing errors.
         All pricing and specifications subject to change without notice.