Description

Information and specifications page for the SD-125EL U1 Options and Accessories: Please scroll down to view related items.

SD-171 148-174 MHz 5/1 Watts

The 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.

Whether implementing a new system or installing into an existing system, the Maxon family of data telemetery radios have been the choice of OEM and end-users worldwide for over 25 years.

Features:

Synthesized Frequency Tuning
1 or 5 Watts RF Output
148-174 MHz VHF - SD-171 (Current Model listed on this page)
450-490 MHz UHF - SD-174
Programmable up to 16 Channels
16 Channels (Dip Switch Select)
(internal dip switch)
Programmable Wide/Narrow Band
Operates from 9V to 18 VDC
CTCSS / DCS Tone Signalling
2-Tone Decode
LED Status Indicator
DB-15 Female Connector
12.5/25 kHz Channel Spacing
Carrier Detect
Time-out-timer / Busy Ch Lockout
Marked Idle / TX Delay
Programmable Wide/Narrow Ban
BNC Female Antenna Connector
Courtesy Beep
Complies with NTIA Specifications
Die-Cast Aluminum Housing
TX Time Out Timer
PC Programming via Software and Cable (optional)

Applications:

Water/Waste Treatment Plants
Oil and Gas Field SCADA
Security/Alarm System
Gate Systems
Remote Controls
Commercial Sign Control
Automatic Vehicle Location
Murphy/Kill Switches
Weather Monitoring
Irrigation Systems
Emergency Call Boxes
Low Power Repeaters


General Specifications
Parameter:	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]
Weight	8.9 oz [253 gm]
Materials	Die-cast Aluminum
IC Certification Number	pending	pending

ANSI/TIA/EIA-603 Receiver Specifications
Parameter:	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	-65dB
Intermodulation	-70dB
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
Parameter:	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	-40dB
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
ORIGINAL VERSION
Data Port allowing communications with support devices on the SD-174 and SD-171

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

NOTE: Some features indicated by specifications listed are prohibited by FCC rule and are not available on models sold in the U.S. or its territories. Note: Features and specifications subject to change without notice.