TB 9-6625-2139-24
(36) Remove 5-80 pF standardizer and connect oscilloscope calibrator CHAN 1
Voltage to TI CH 1. Repeat (30) above.
(37) Adjust C5 100X LF COMP (fig. 1) for best front corner.
(38) Connect oscilloscope calibrator CHAN 1 to TI CH 1 using a 5-80 pF
standardizer and repeat (30) above.
(39) Adjust C4 100X LF (fig. 1) for best flat top.
(40) Repeat (36) through (39) above until no further improvement is noted.
(41) Continue calibration at paragraph 8 a (1) above.
(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 CH2 STEP BAL (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 switch 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 CH2 2/5-mV DC BAL (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 switch from 5m to 2m.
(54) Connect oscilloscope calibrator CHAN 1 to TI CH 2 using a 50 :
feedthrough termination.
(55) Position controls as listed in (a) through (c) below:
(a) CH 2 VOLTS/DIV switch to 10m.
(b) CH 2 AC GND DC switch to DC.
(c) A AND B SEC/DIV switches to 20 Ps.
(56) Set oscilloscope calibrator EDGE output to 10 kHz and amplitude for 5
divisions of vertical deflection on TI.
(57) Adjust CH 2 POSITION control to position top of waveform to the center
horizontal graticule line.
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