Section IV ALINEMENT AND ADJUSTMENT PROCEDURES

TM 11-5820-670-30

Section IV ALINEMENT AND ADJUSTMENT PROCEDURES

Subject

Para

Page

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

2-27

2-126

Rf Amplifier Assembly A6500 Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-28

2-127

Gearbox Assembly A9700 Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-29

2-130

Audio Level Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-30

2-132

Carrier Squelch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-31

2-134

150 Hz Tone Modulation Frequency and Deviation Adjustment . . . . . . . . . . . . . . . . . . . . . . . .

2-32

2-136

Tone Squelch Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-138

2-33

Narrow Band Deviation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-140

2-34

Receiver Sensitivity Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-142

2-35

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

2-36

2-146

Homing Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-148

2-37

2-27. GENERAL.

This section contains alinement instructions for use with Maintenance Kit MK-1035/ARC-131 and

TMDE (discrete test equipment). The instructions are presented in individual procedures which apply

to a specific stage of the rt receiver or transmitter section.

Each procedure is self-contained; that is, all necessary instructions are provided without reference to

any previously performed alinement. Therefore, it is possible to use the procedures in this section to

aline an individual module without doing any work on 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.

2-126