Description

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

SD-171EX VHF 142-174 MHz

The Maxon SD-170EX Series of radios are durable, reliable and designed to meet the needs for a variety of wireless applications in VHF or UHF frequencies..

The modules incorporate the most requested mechanical footprint, DE-9 male connector, and BNC antenna connection. Adjustable transmit power settings provides the power needed on any job and the tri-color LED indicator gives instant on-sight status of the radios operation. The die cast aluminum cabinet/lid provides resistance to RF interference and gives exceptional environmental durability in the most extreme conditions. The SD-170EX can also be configured with POCSAG for paging applications.

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-171EX

Features:

Synthesized Frequency Tuning
1 or 5 Watts RF Output
142-174 MHz VHF SD-171EX (Current Model listed on this page)
450-490 MHz UHF SD-174EX
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-9/DB-9 Male Connector
12.5/25 kHz Channel Spacing
Busy Channel Lockout
BNC Female Antenna Connector
Carrier Detect
2-Tone Decode
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-171EX	Maxon UHF SD-174EX
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-171EX	Maxon UHF SD-174EX
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-171EX	Maxon UHF SD-174EX
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.