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TM 11-5895-1141-34
Section IV. TESTING MODULES USING THE MTS-2400 MODULE TEST SET
SECTION CONTENTS
Page
Description of Module Test Set ...............................................................................................
Procedure for Testing Modules ...............................................................................................
Turn-on and Preliminary Checks .............................................................................................
4-9. DESCRIPTION OF THE MODULE TEST SET
a.  Overall system testing can be greatly facilitated by the use of the MTS-2400 Module Test Set.
The test
procedures described in this paragraph are based on the use of the module test set.
b.  The module test set includes one each of the following modules: audio unit module, selector module and
speaker amplifier module. These modules are certified to meet the specified operating requirements. The receptacles for
these modules are interconnected to each other and to simulate input sources and simulated output loads. The purpose
of the test set is to represent the configuration of a single operator's position and single radio channel. Also included is a
provision for testing the operation of the jack unit. Testing of a particular module is accomplished by simply installing the
module under test, in place of the standard module. To facilitate module testing, a module test adapter is provided.
Inserting one end of the adapter into the receptacle of the module test set and engaging its opposite end with the module
under test, permits the interior of tested module to be accessed for diagnosis and adjustment. The module test set also
includes a sinusoidal oscillator with three selectable fixed frequencies, a voltmeter covering the range from 3.5 millivolts, to
3.5 volts ac in five ranges as well as a 0 to 30 vdc on a single range, and a dc voltage supply variable from 22 to 26 volts.
Input signals from external sources can also be applied for use by the test set. The test set output signals are available at
a pair of output terminals for use with a distortion analyzer or oscilloscope.
c.
A diagram of the module test set front panel is given in figure FO-11. The front panel functions are listed in Table
4-11.
4-26


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