C950503

WAVEGUIDE TRANSCEIVERS TM ® 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 ® 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.) : 5µSec Duty Cycle (Min.) : 1% Receiver : >1000µV p-p Noise Output Signal* :