TB 9-6625-2024-35
a. Performance Check
(1) Install calibration adapter in left vertical compartment.
(2) Set calibration adapter TEST switch to VERT OR HORIZ COM MODE. If
displayed trace is not within 3 minor divisions of center horizontal graticule line,
perform b(1) below.
(3) Set POSITION and AMPLITUDE controls on calibration adapter to
midrange.
(4) Set calibration adapter TEST switch to VERT OR HORIZ GAIN.
(5) Set REP RATE control on calibration adapter to 100 kHz.
(6) Using calibration adapter POSITION control, align bright center trace of
display with center horizontal graticule line. If deflection over center 7 traces is not 6
divisions 0.5 minor division, perform b(2) and (3) below.
(7) Remove calibration adapter front left vertical compartment and install in
right vertical (middle) compartment.
(8) Press VERT MODE RIGHT pushbutton in.
(9) Using calibration adapter POSITION control, align bright center trace of
display with center horizontal graticule line. If deflection over center 7 traces is not 6
divisions 0.5 minor division, perform b(4) below.
b. Adjustments
(1) Adjust vertical centering R403 (fig. 2) to position trace to center horizontal
graticule line (R).
(2) Adjust bias potentiometer R486 (fig. 2) for maximum deflection between
traces (R).
(3) Adjust R447 (fig. 2) for 6 divisions of deflection over the center 7 traces (R).
