LD 737 630 Bedienungsanleitung

12/07-W00-Bb

Instruction Sheet 737 630

MTI Simulator (737 630)

Target Control (737 630 1)

1 Toggle switch for selection of frequency range

2 Frequency fine adjust

3 Adjust for reflector displacement

4 Output to connect the Doppler target (4 mm sockets)

Doppler Target (737 630 2)

5 Metal reflector

6 Input Socket (with high power ohmic load)

Security Hints

The MTI Simulator is exposed to the field of a microwave sour-

ce. Experimentation therefore is due to the common known

regulations concerning the handling with RF emitting sources.

- Avoid directly viewing into the radiating waveguide.

- Apply to the additional security hints of 737 01 Gunn Oscillator

The operation of the MTI Simulator without supervision by an

experienced tutor, or outside a training facility is not allowed.

Warnings

The Doppler Target is a modified loudspeaker. The

loudspeaker’s cone is unprotected and gives free acces for

didactic reasons. As cone and reflector are mechanical

sensistive parts it is imperative: Not to touch! Behind the 4 mm

sockets, on the rear side of the Doppler Target, there is a high

power ohmic load, which heats up during operation with

maximum amplitude (adjustable at target control). Attention

don’t touch with your fingers!

1 Description

The MTI Simulator is designed to perform stationary experi-

ments in Doppler radar systems. The moving target is the oscil-

lating reflector plate upon the membrane of the loudspeaker.

The Target Control supplies the electrical power for the Doppler

Target. The simulation of Doppler targets with different speed is

simulated by frequency and amplitude adjustments. The output

signals from the Doppler Converter (737 615) are measured

with Sensor-CASSY. They are evaluated with the CASSY Lab

software. The speeds selectable at the Target Control are simi-

lar to those of the trolley on the track. The operation of the MTI

Simulator needs additional material and a PC with software.

Instruction Sheet 737 630 Page 2/2

2 Scope of Delivery

1 Target Control

1 Doppler Target

1 Stand Rod 215 mm, M6

3 Setting into Operation

additionally required:

1 PC, at least 1 GHz, Windows XP, SP2

1 Sensor-CASSY

1 CASSY Lab software

- Install CASSY LAB and start the software.

4 Accessory

The MTI Simulator is part of the COM3LAB Course 737 65.

COM3LAB Course: Radar Technology II

1 Gunn Oscillator (737 01)

1 Large Horn Antenna (737 21)

1 Set passive Targets (737 610)

1 MTI Simulator (737 630)

1 Doppler Converter (737 615)

2 Plug in power supply 230V/12V AC (562 791)

2 Storage Tray 240x480x80 (648 07)

5 Partition ZW24 (648 08)

The operaton of the MTI Simulator needs additional material

from this course.

5 Technical Data

Range of target frequency: 5 Hz... 500 Hz

Displacement of the

reflector membrane: approx. 5 mm

Radar cross section: 0.2 m² for f=9.40 GHz

Supply voltage: 12 V AC

Dimensions

Target Control: 115 mm ×115 mm ×60 mm

Doppler Target: Diameter 150 mm

Masses

Target Control: ca. 300 g

Doppler Target: ca 1000 g

6 Operation

6.1 Set up of the Doppler radar

additionally required:

1 Gunn Oscillator (737 01)

1 Large Horn Antenna (737 21)

1 Sensor-CASSY (524 010)

2 Plug in power supply

Experimentation cables, stands, etc.

- Set up the experiment as shown.

- Follow the additional hints in the instruction sheets of the other

devices, respectively follow the information given in the multi-

media course Radar Technology II.

6.2 Using the MTI-Simulator

- Mount the Doppler target on the second stand, such a way that

a common experimentation unit is formed with the Gunn Oscilla-

tor.

- Start the CASSY Lab software.

- Measure some FFT spectra of the Doppler signal for different

frequency- and amplitude settings of the Target Control. To

do this press F9 or .

Screenshot of Doppler signals produced by the MTI Simula-

tor (FFT representation).

LD DIDACTIC GMBH .Leyboldstrasse 1 .D-50354 Hürth .Phone (02233) 604-0 .Fax (02233) 604-222 .e-mail: [email protected]

©by LD Didactic GmbH Printed in the Federal Republic of Germany

Technical alterations reserved

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