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WAVEGUIDE TRANSCEIVERS
TM (R)
Fixed Frequency
MDU19xx Series
Features
Low cost Standard Waveguide output Rugged, Reliable Construction Low Power Consumption High Sensitivity
Description
The MDU (Motion Detector Unit) is an X-Band microwave transceiver that utilizes the Doppler shift phenomenon to "sense" motion. The unit, contained in a rugged diecast housing, features a dielectric resonator stabilized FET oscillator, which provides stable operation over a broad temperature range in either CW or low duty cycle pulse mode. The unit is available as a "transmit only" unit, with a single mixer or with a pair of orthogonal mixers for direction sensing applications.
Applications
Traffic Control Automatic Door Openers Speed Measurement Direction of motion detection Energy Management Systems Sports Radar Guns
This document only gives a general description of the product and shall not form part of any contract. Microwave Solutions pursue a policy of continuous product improvement and reserve the right from time to time to amend the specifications of products.
Copyright 2008 Rev: 2009-02-10
Microsemi
Microwave Products
Page 1
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
WAVEGUIDE TRANSCEIVERS
TM (R)
Fixed Frequency
MDU19xx Series
Operation
The basic principle of operation consists of detecting the frequency shift between a transmitted and a received signal reflected back from a moving object within the field of view of the unit. The MDU1900 unit produces two low level output signals which can be amplified and processed to provide an audible or visual alarm. These signals are nominally orthogonal in phase and the direction of the detected target can be ascertained from the lead/lag between the two outputs The MDU1910 unit produces a single low level output signal which can be amplified and processed to provide an audible or visual alarm. The MST1950 unit includes the transmitter only and can be used with a separate receiver as one end of a microwave link. All the units employ low cost surface mount manufacturing techniques which are field proven as being rugged
: +5V 0.25V : 60mA max. : 50mA typ. Frequency : see table Frequency Setting Accuracy : 3MHz : 3MHz/V Frequency Pushing (Max) Power Output MDU1900/MDU1910 : +7dBm (Typ) MDU1900/MDU1910 :+10dBm (Typ) Power Variation : 3dB/v (Max) : < -7dBm Harmonic Emissions Pulse Mode Operation Average Current (5% DC) : 2mA typ. Pulse Width (Min.) : 5Sec Duty Cycle (Min.) : 1% Receiver : >1000V p-p Noise Output Signal* : <150V p-p (Both in 3Hz to 80Hz bandwidth) * With standard test system Output Connection Waveguide :WG16/WR90/R100 Waveguide Flange :UBR100 Model MDU1900 MDU1910 MST1950 Application Dual Orthogonal Mixers Single Mixer Transmit Only Order Code C950503 C950501 C960503 C960501 C970503 C970501
Electrical Characteristics Transmitter Operating Voltage Operating Current (CW)
Mechanical Characteristics Weight : 85 grams Tab Connections : 0.1" spacing Environmental Characteristics Power Drift (over operating temp. range) : 3dB Frequency Drift (over operating temp. range) : 10MHz Operating Temperature : -10C to +55C Storage Temperature : -30C to +70C
NOTES Detection range is dependent on size and reflectivity of target and S/N ratio Doppler shift at 10.587GHz is 31Hz/m.p.h. Unit functions over -30C to +70C with reduced performance
Outline Drawing
Frequency 10.525GHz 10.587GHz 10.525GHz 10.587GHz 10.525GHz 10.587GHz
Comments Holland, Belgium, Italy, USA UK Holland, Belgium, Italy, USA UK Holland, Belgium, Italy, USA UK
Copyright 2008 Rev: 2009-02-10
Microsemi
Microwave Products
75 Technology Drive, Lowell, MA. 01851, 978-442-5600, Fax: 978-937-3748
Page 2

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