TB 9-6625-2346-35
(15) Set oscilloscope calibrator for an EDGE mode output of 10 kHz and adjust for 5
divisions of vertical deflection on TI.
(16) Adjust TI CH 1 ⇕POSITION control to position top of waveform to center
horizontal graticule line.
(18) Remove 50Ω feedthrough termination and connect oscilloscope calibrator CHAN
1 to TI CH 1.
(19) Set oscilloscope calibrator for a VOLT mode output of 10 mV at 1 kHz.
(20) Position TI controls as listed in (a) through (c) below:
(a) CH 1 VOLTS/DIV switch to 2m.
(b) A AND B SEC/DIV switches to .2 ms.
(21) Adjust R26 (fig. 1) for 5 divisions of TI vertical deflection (R).
(22) Set TI CH 1 VOLTS/DIV switch to 10m.
(23) Set oscilloscope calibrator for a 50 mV output.
(24) Adjust R145 (fig. 1) for 5 divisions of vertical deflection on TI (R).
(25) Connect oscilloscope calibrator CHAN 1 to TI CH 1 using a 5-80 pF
standardizer.
(26) Set oscilloscope calibrator for an EDGE mode output of 1 kHz and adjust for 5
divisions of vertical deflection on TI.
(27) Adjust 5-80 pF standardizer for optimum square wave.
(29) Set TI CH 1 VOLTS/DIV switch to .1.
(30) Replace 5-80 pF standardizer with 50Ω feedthrough termination.
(31) Set oscilloscope calibrator amplitude for 5 divisions of vertical deflection on TI.
(32) Adjust C12 (fig. 1) for best front corner.
(33) Replace 50Ω feedthrough termination with 5-80 pF standardizer and repeat (31)
above.
(34) Adjust C11 (fig. 1) for best flat top.
(35) Repeat (30) through (34) above until no further improvement is noted.
(36) Set TI CH 1 VOLTS/DIV switch to 1.
(37) Remove 5-80 pF standardizer and connect oscilloscope calibrator CHAN 1 to TI
CH 1, repeat (31) above.
(38) Adjust C5 (fig. 1) for best front corner.
(39) Connect oscilloscope calibrator CHAN 1 to TI CH 1 using 5-80 pF standardizer
and repeat (31) above.
(40) Adjust C4 (fig. 1) for best flat top.
12