TB 9-4931-491-24
(6) Connect HORIZ output to oscilloscope CH 2 (set oscilloscope for an X verses Y
function operation).
(7) Set SWEEP TIME SEC to .1-.01.
(8) Adjust oscilloscope width to 10.4 cm (.2 cm overlap on each end) (fig. 10a).
(9) Connect oscilloscope to M2H TP2 (fig. 5) and chassis ground.
(10) If oscilloscope sweep does not "knee" (fig. 10b) approximately 2/3 cm to the left of
the 10 cm mark, perform b (3) below.
Figure 10. M2H linearity reference adjustment.
b. Adjustments
(1) Adjust R17 (fig. 5) for 0 V indication on oscilloscope (R).
(2) Adjust R26 (fig. 5) for 28 V pp indication on oscilloscope (R).
(3) Adjust R31 (fig. 5) until oscilloscope sweep "knees" approximately 2/3 cm to the
left of the 10 cm mark (R).
(4) Repeat paragraphs 9 through 13 above.
18. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.