Phase Accuracy - Continued

TB 9-6625-2213-24

(5) Position controls as listed in (a) through (d) below:

(a) PHASE METER OFFSET switch to 0.

(b) PHASE RANGE switch to 60.

(d) LINE PUSH ON/OFF pushbutton to ON.

(6) Adjust synthesizer/level generator cw frequency controls for a frequency counter

indication between 19.99 and 20.01 kHz.

(7) Adjust synthesizer/level generator amplitude controls for a 1000 mV indication

on TI AMPLITUDE meter.

NOTE

Do not obtain more than 10 degree correction from any single

adjustment.

(8) While observing PHASE meter adjust PHASE RANGE ZERO control fully cw.

If PHASE meter does not indicate +18 degrees, adjust A8R32 (fig. 4) for a +18 degree

indication (R).

(9) Adjust PHASE RANGE ZERO control fully ccw. If PHASE meter does not

indicate -18 degrees, adjust A8R24 (fig. 4) for a -18 degree indication (R).

(10) Repeat (8) and (9) above until no further adjustments are required.

NOTE

If 18 degree range cannot be obtained by adjusting A8R32

(fig. 4) and A8R24 (fig. 4), perform adjustments as listed in

TM 11-6625-2856-14.

NOTE

If TI does not have adjustments A8R26 and A8R33 (fig. 4),

proceed to (20) below.

(11) Connect multimeter (dc mode) black lead to chassis ground and red lead to

junction of wiper arm of A8R33 (fig. 4) and base of A8Q16 (located on A8 ASSY (fig. 4)).

(12) Adjust A8R33 (fig. 4) for a multimeter indication of +7.4 V dc (R).

(13) Move multimeter red lead from junction of wiper arm of A8R26 (fig. 4) and base

of A8Q12 (located on A8 ASSY (fig. 4)).