TB 9-6625-2059-35
(16) Set MODULATION FREQ Hz switches to 00020.0. Measure distortion at 20 Hz.
Audio analyzer will indicate 1.5 percent distortion or less.
(17) Set MODULATION FREQ Hz switches to 19 999.9. Measure distortion at
19,999.9 Hz. Audio analyzer will indicate 0.7 percent distortion or less.
(18) Disconnect equipment setup.
(19) Set VAR control to OFF.
b. Adjustments
(1) Adjust A1A12A5C1 (fig. 2) until frequency counter indicates 1000 Hz 0.1 Hz (R).
(2) Adjust A1A2A5R15 (fig. 2) until frequency counter indicates 1000 Hz (R).
