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) :

10MHz 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.)

:

5µSec Duty

Cycle (Min.)

:

1%

Receiver

Output Signal*

: >1000µV p-p Noise

: <150µV 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