TM 11-6625-3053-14
STEP
OPERATION
NORMAL INDICATION
CORRECTIVE ACTION
10
ALINEMENT OF A3R1 SQ RATE ADJ
Leave dust cover off or remove if on (para 6-20).
Swing A2 ckt card up counterclockwise to vertical position until locked in place by stop located on A3
mtg bracket.
Connect the R F OUTPUT to ext frequency counter 5345A through an R F cable.
Set MODULATION switch to RF OFF and SQ WAVE RATE control to center position.
Energize ext frequency counter and sig gen if off.
Set MODULATION switch to INT SQ WAVE if sig gen was on, or wait 2 mins before doing so.
ADJUST A3R1 for a reading of:
1000 Hz on the frequency counter.
T/S item 15.
Turn SQ WAVE RATE control fully counter clockwise.
Ext frequency counter should register 950 Hz or less.
T/S item 15.
Turn SQ WAVE RATE control fully clockwise.
Ext frequency counter should register 1050 Hz or more.
T/S item 15.
Return A3 ckt card to original position:
Deenergize sig gen.
6-46