TB 9-6625-2139-35
(38) Connect oscilloscope calibrator CHAN 1 to TI CH 1 using a 5-80 pF
standardizer and repeat (30) above.
(39) Adjust C4 (fig. 1) for best flat top.
(40) Repeat (36) through (39) above until no further improvement is noted.
(41) Disconnect oscilloscope calibrator CHAN 1 from TI CH 1.
(42) Set CH 2 AC GND DC switch to AC.
(43) Set CH 2 VOLTS/DIV switch to 50m.
(44) Adjust CH 2 POSITION control to position trace on center horizontal graticule
line.
(45) Set CH 2 VOLTS/DIV switch to 5m.
(46) Adjust R60 (fig. 1) to position trace on center horizontal graticule line.
(47) Repeat (43) through (46) above for minimum trace shift when setting CH 2
VOLTS/DIV switch from 50m to 5m.
(48) Adjust CH 2 POSITION control to position trace on center horizontal graticule
line.
(49) Set CH 2 VOLTS/DIV switch to 2m.
(50) Adjust R83 (fig. 1) to position trace on center horizontal graticule line.
(51) Set CH 2 VOLTS/DIV switch to 5m.
(52) Repeat (48) through (51) above for minimum trace shift when setting CH 2
VOLTS/DIV switch from 5m to 2m.
(53) Connect oscilloscope calibrator CHAN 1 to TI CH 2 using a 50Ω feedthrough
termination.
(54) 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 s.
(55) Set oscilloscope calibrator EDGE output to 10 kHz and amplitude for 5
divisions of vertical deflection on TI.
(56) Adjust CH 2 POSITION control to position top of waveform to the center
horizontal graticule line.
(57) Adjust C53 (fig. 1) and R97 (fig. 1) for the best square corner and flat top.
(58) Remove 50 Ω feedthrough termination and connect oscilloscope calibrator
CHAN 1 to TI CH 2.
(59) Set oscilloscope calibrator VOLTAGE output to 10 mV and 1 kHz.
(60) Position controls as listed in (a) through (c) below:
PIN: 058614-003