TB 9-6625-2347-35
(46) Set TI CH 2 VOLTS/DIV switch to 10m.
(47) Adjust R246 (fig.2) 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 10m to 20m.
(49) Position TI switches as listed in (a) through (c) below:
(a) CH 2 VOLTS/DIV to 20m.
(b) CH 2 AC GND DC to DC.
(c) SEC/DIV to .2 ms.
(50) Disconnect oscilloscope calibrator SOURCE/MEASURE CHAN 1 from TI CH 2
OR Y input.
(51) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI CH 2 OR
Y input using a 50Ω feedthrough termination.
(52) Set oscilloscope calibrator for a CH 1, EDGE mode output of 1 kHz and adjust
amplitude for 5 divisions of TI vertical deflection.
(53) Adjust C205 (fig. 2) for best front corner and C204 (fig. 2) for best flat top.
(54) Set TI CH 2 VOLTS/DIV switch to 2.
(55) Adjust oscilloscope calibrator output for 5 divisions of TI vertical deflection.
(56) Adjust C211 (fig. 2) for best front corner and C210 (fig. 2) for best flat top.
(57) Set oscilloscope calibrator to STANDBY and disconnect setup.
(58) Position TI controls as listed in (a) through (c) below:
(a) CH 1 VOLTS/DIV switch to 20m.
(b) CH 2 VOLTS/DIV switch to 20m.
(c) SEC/DIV switch to .05 s.
(59) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI CH 2 OR
Y input using a 10X attenuator and a 50Ω feedthrough termination.
(60) Set oscilloscope calibrator for a CH 1, EDGE mode output of 1 MHz and adjust
amplitude for 5 divisions of TI vertical deflection.
(61) Preset R357 (fig. 1) to fully ccw position.
(62) Adjust C357 (fig. 1) until ringing just disappears on front corner of displayed
(64) Adjust R357 (fig. 1) and C357 (fig. 1) for best corner on first 20 ns of displayed
(65) Repeat (63) and (64) above until no further improvement is noted.
(66) Set TI CH 2 VOLTS/DIV switch to .1 and (63) and (64) above for best
compromise with CH 2 VOLTS/DIV 20m setting.
(68) Position TI switches as listed in (a) through (c) below:
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