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Topaz Logo

Maxon Logo
Midland Two-Way Radio

Maxon Synthesized 2 Watt RF Data Link Radio Telemetry Module


SD-161V SD-161U Maxon Synthesized RF Data Link Module

For Guaranteed Lowest Pricing...




Sorry-This Radio is No Longer Available

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

$ Qty
VHF 148-174 MHz
Maxon SD-161V
12.5/15/25/30 KHz Ch Spacing
16 Channel - 2 Watts

$ Qty
UHF 450-490 MHz
Maxon SD-164U
12.5/25 KHz Ch Spacing
16 Channel - 2 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-161V & SD-164U Series Data Modules are manufactured under ISO 9002 quality standards and are IC approved (pending) for sale in Canada.

The new Maxon SD-160 Series RF Data Link Telemetry Radio delivers reliable 2-way communication & remote control for a variety of application needs. Available as VHF (SD-161) or UHF (SD-164) with 2 Watts and 16 channels. The SD-160 Series provides reliable data or voice communication at all times. Crystal clear audio quality makes the SD-160 Series an ideal radio for golf course and emergency call boxes. When paired with the optional GMSK or FFSK modem board, the SD-160 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
  • 2 Watts RF Output
  • 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-161 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

Check Out the SR-170 Repeater
Built using SD-170 Series Data Radios


Check Out Maxon's Other
Data Telemetry Radios:

SD-125EL Series  SD-170EL Series
SD-170EX Series  SD-270 Series 
TD-1500  TD-2400MD




 Optional Accessories - Antennas
Model # Description  NO LONGER AVAILABLE Price

 CA-1506B  6" VHF 148-174 MHz Antenna w/BNC  (uncut)
 CA-4506B  6" UHF 440-470 MHz Antenna w/BNC connector
 CA-4506Y  6" UHF 488-512 MHz Antenna w/BNC connector
 ACC-160  GPS Antenna
 Optional Accessories - Signaling
Model # Description  NO LONGER AVAILABLE 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-2016  PC Programming Cable   NO LONGER AVAILABLE
  (Requires  ACC-916 below)
 ACC-916CD  PC Programming Software (CD-ROM)  WARNING!
 (Includes Disk & Instructions)
 680-100-2014  SD-160 Series Service Manual
 (includes SD-170 series)
    Wt     $ Qty

General Specifications  
  Maxon VHF SD-161 Maxon UHF SD-164
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-161 Maxon UHF SD-164
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-161 Maxon UHF SD-164
RF Power Output.

2 Watts

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
  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)

Topaz logo covering Maxon and Legacy products
Topaz technology, today, tomorrow. The Maxon and Legacy brand products in this document portray our experience and dedication to the communications industry. With continued growth and new product offerings, we are ready to meet the challenges of tomorrow.
Your assurance of quality. We are very proud of our product quality and stand behind every product we sell with these three Quality Assurance Promises:
  • 2 Year Parts and Labor Warranty
  • 6 Month Replacement Program Quality
  • Parts Performance Guarantee

From manufacture, our radio products are certified to strict ISO 9002 quality standards by one or both of these internationally known agencies.

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

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Terms & Conditions
Table of Contents

Copyright 2000-2018  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 2-5 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 and voice mail is not available. 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.