TB 9-6625-2346-35
(41) Repeat (37) through (40) above until no further improvement is noted.
(42) Disconnect oscilloscope calibrator CHAN 1 from TI CH 1.
(43) Set CH 2 AC GND DC switch to AC.
(44) Set CH 2 VOLTS/DIV switch to 50m.
(45) Adjust CH 2 ⇕POSITION control to position trace on center horizontal
graticule line.
(46) Set CH 2 VOLTS/DIV switch to 5m.
(47) Adjust R60 (fig. 1) to position trace on center horizontal graticule line.
(48) Repeat (44) through (47) above for minimum trace shift when setting CH 2
VOLTS/DIV from 50m to 5m.
(49) Adjust CH 2 ⇕POSITION control to position trace on center horizontal
graticule line.
(50) Set CH 2 VOLTS/DIV switch to 2m.
(51) Adjust R83 (fig. 1) to position trace on center horizontal graticule line.
(52) Set CH 2 VOLTS/DIV switch to 5m.
(53) Repeat (49) through (52) above for minimum trace shift when setting CH 2
VOLTS/DIV from 5m to 2m.
(54) Connect oscilloscope calibrator CHAN 1 to TI CH 2 using a 50Ω feedthrough
termination.
(55) Position TI switches as listed in (a) through (c) below:
(a) CH 2 VOLTS/DIV to 10m.
(b) CH 2 AC GND DC to DC.
(c) A AND B SEC/DIV to 20 s.
(56) Set oscilloscope calibrator for an EDGE mode output of 10 kHz and adjust for 5
divisions of vertical deflection on TI.
(57) Adjust TI CH 2 ⇕POSITION control to position top of waveform to center
horizontal graticule line.
(59) Remove 50Ω feedthrough termination and connect oscilloscope calibrator CHAN
1 to TI CH 2.
(60) Set oscilloscope calibrator for a VOLT mode output of 10 mV at 1 kHz.
(61) Position TI controls as listed in (a) through (c) below:
(a) CH 2 VOLTS/DIV switch to 2m.
(b) A AND B SEC/DIV switches to .2 ms.
(c) CH 2 ⇕POSITION to view waveform.
(62) Adjust R76 (fig. 1) for 5 divisions of TI vertical deflection (R).
(63) Set TI CH 2 VOLTS/DIV switch to 10m.
(64) Set oscilloscope calibrator for a 50 mV output.
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