TB 9-6625-2024-24
(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 r0.5 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 r0.5 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 (OS245(P)/U (fig. 2) for 6 divisions of deflection over the center 7
traces (R).
Figure 2. Test instrument - left view.
(4) Readjust R447 (OS245(P)/U) (fig. 2) as necessary for best compromise
within r0.5 minor division in a (6) and (9) above (R).
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