mdu19xx series microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 1 waveguide transceivers fixed frequency tm ? copyright ? 2008 rev: 2009-02-10 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 o f the product and shall not form part o f 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. downloaded from: http:///
mdu19xx series microsemi microwave products 75 technology drive, lowell, ma. 01851, 978-442-5600, fax: 978-937-3748 page 2 waveguide transceivers fixed frequency tm ? copyright ? 2008 rev: 2009-02-10 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 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) : 10 mhz operating temperature : -10oc to +55oc storage temperature : -30oc to +70oc 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 -30oc to +70oc with reduced performance electrical characteristics transmitter operating voltage : +5v 0.25v operating current (cw) : 60ma max. : 50ma typ. frequency : see table frequency setting accuracy : 3mhz frequency pushing (max) : 3mhz/v power output mdu1900/mdu1910 : +7dbm (typ) mdu1900/mdu1910 :+ 10dbm (typ) power variation : 3db/v (max) harmonic emissions : < -7dbm pulse mode operation average current (5% dc) : 2ma typ. pulse width (min.) : 5sec duty cycle (min.) : 1% receiver output signal* : >1000v p-p noise : < 150v p-p (both in 3hz to 80hz bandwidth) * with standard test system output connection waveguide :wg16/wr90/r100 waveguide flange :ubr100 outline drawing model application order code frequency comments mdu1900 dual orthogonal mixers c950503 c950501 10.525ghz 10.587ghz holland, belgium, italy, usa uk mdu1910 single mixer C960503 c960501 10.525ghz 10.587ghz holland, belgium, italy, usa uk mst1950 transmit only c970503 c970501 10.525ghz 10.587ghz holland, belgium, italy, usa uk downloaded from: http:///
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