Description

Information and specifications page for the SD-171EL Options and Accessories: Please scroll down to view related items.

SD-171EL VHF 142-174 MHz

The Maxon SD-170EL Series of radios are durable, reliable and designed to meet the needs for a variety of wireless applications. Include the optional FFSK or GMSK modem boards to add even more diversity to this cost effective radio. The modules incorporate the popular mechanical footprint, DE-15 female connector and BNC antenna connection.

The modules incorporate the most requested mechanical footprint and BNC antenna connection. Adjustable transmit power settings from one to five watts provides the power needed on any job and the tri-color LED indicator gives instant on-sight status of the radios operation. Combine that with low current drain and fast transmitter/receiver attack times for operation in the harshest of system demands. The die cast aluminum cabinet/lid provides resistance to RF interference; and gives exceptional environmental durability in the most extreme conditions.

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.

Maxon's 3 year warranty and FCC, European Conformity and Industry Canada Certification logos certifies that the electromagnetic interference, safety, manufacture and other quality parameters have been met by the Maxon SD-171EL

Features:

SD-170E Series User Manual
Synthesized Frequency Tuning
1 or 5 Watts RF Output
142-174 MHz VHF SD-171EL (Current Model listed on this page)
450-490 MHz UHF SD-174EL
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 Encode/Decode
LED Status Indicator
DE-15 Female Connector
9-PIN Version Available - SD-171EX
12.5/25 kHz Channel Spacing
Carrier Detect
Busy Channel Lockout
BNC Female Antenna Connector
Modem Options* (GMSK/FFSK)
Internal Mounting for Optional Modem Boards
*ACC-513E GMSK 9600 Baud
*ACC-514E FFSK 4800 Baud
Carrier Detect
2-Tone Decode
Die-Cast Aluminum Housing
TX Time Out Timer
PC Programming via Software and Cable (optional)
Call for Assistance
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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-171EL	Maxon UHF SD-174EL
Frequency Range	142-174 MHz	450-490 MHz
Approvals	RXUSD-171E	RXUSD-174E
FCC Parts	Parts 22, 74, 90, 210
Channels	1 to16 internal dip switch selectable
Channel Spacing	12.5 / 25 KHz
Channel Stepping	2.5, 5 & 6.25 KHz
Channel Spread	32 MHz	40 MHz
Frequency Stability	±5.0 ppm	±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, 12V nominal
LED Status	Green - Receive or Decode / Red - Transmit / Yellow - Busy
Current Drain @12V	65 mA Rx / 1.0A Tx Low / 2.0A Tx Hi
Lock Time	<10ms
Operating Rating	35% @ Temp Range Listed
Dimensions [LWD]	4.6 x 2.4 x 1.4” (117x62x35 mm)
Weight	9.4 oz. (267 g.)
Materials	Die-cast Aluminum
IC Certification Number	153B-SD-171E	153B-SD-174E

Receiver Specifications
Parameter:	Maxon VHF SD-171EL	Maxon UHF SD-174EL
Frequency Stability	< ±5 PPM	< ±2.5 PPM
Sensitivity (12dB SINAD)	.30μV (12.5 kHz), 0.28μV (25 kHz)
Selectivity	65dB (12.5 kHz), 70dB (25 kHz)
Response Time	<16ms
Spurious Emissions	-57dB (9kHz-1GHz),-47dB (1GHz-4GHz)
Intermodulation	-70dB
Audio Output	0.5 Watt
RX Hum/Noise	-40dB (12.5 kHz), -40dB (25 kHz)
Squelch Attack Time	<20/40 ms (RSSI/Analog) <10/30ms (RSSI/Analog), ±20dB
Squelch Decay Time	5 ms Min., 20 ms Max
Spurious/Harmonic	65dB
Input Impedance	50 ohms

Transmitter Specifications
Parameter:	Maxon VHF SD-171EL	Maxon UHF SD-174EL
RF Power Output.	5/1 Watt Programmable
Frequency Deviation	±2.5, Min. ±1.9 kHz (12.5 kHz) / ±5.0, Min. ±3.8 kHz (25 kHz)
Modulation	11K0F3E / 16K0F3E
Spurious & Harmonics	-36dBm
FM Hum & Noise	40dB (12.5 kHz), 40dB (25 kHz)
Adj. Channel Power	70dB (25 kHz), 60dB (12.5 kHz)
Audio Response	+1, -3dB from 6dB per octave pre-emphasis and characteristic 300 ~ 3000 Hz
Modulation Sensitivity	100mV RMS (60% peak dev)

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.