Section III ALINEMENT AND ADJUSTMENT PROCEDURES

TM 11-5820-401-34-3/0967-LP-432-3060

Section III ALINEMENT AND ADJUSTMENT PROCEDURES

Page

Para

Subject

General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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4-15

Crystal Reference System (CRS) Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-16

Local Oscillator A1500 Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

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4-17

Tuner A1000 Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-18

IF Discriminator A4200 Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-19

Silicon Version lF Discriminator A4200A Alinement . . . .. . . . . . . . . . . . . . . . . . . . . .

4-125

Audio and Squelch Preamplifier A4300 Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . ..

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4-128

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Silicon Version Audio and Squelch Preamplifier A4300A Alinement . . . . . . . . . . . . .

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4-22

A5300Squeich Filter Alinement . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-134

Silicon Version A5300A Squelch Filter Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . .

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4-24

A5200Squelch AmplifierAlinement NEW SQUELCH Level . . . . . . . . . . . . . . . . . . . .

Silicon Version A5200A Squelch Amplifier Alinement NEWSQUELCH

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Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A5200 SqueIch AmplifierAlinement, OLDSQUELCH Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Silicon Version A5200ASquelch Amplifier Alinement OLDSQUELCH

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Level... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

4-14.GENERAL.

This section contains alinement instructions for use with Maintenance Kit MK-1978/VRC and Test Set

AN/GRM-114A.The instructions are presented in individual procedures which apply to a specific

stage of the receiver.

Except for the local oscillator alinements, each procedure is self-contained; that is, all necessary

instructions are provided without reference to any previously performed alinement. Therefore, itis

possible to use the procedures in this section to aline an individual module without doing anyworkon

other stages in the radio.

However, this maintenance approach is not recommended. It is best to perform a complete realine-

ment of all modules after replacing an individual module. This should be done even if the radio has

undergone its annual realinement less than one year prior to the repair.

Careful performance of all the instructions contained in the alinement procedures ensures that the

radio will meet all performance standards outlined in section I of this chapter. Although the radio may

seem to work satisfactorily if other quick-fix methods are used, there is no guarantee that such

methods will result in proper performance when the radio is used along with secure equipment, or for

other than voice communication.

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