TB 9-6625-2293-35
(19) Move connection from CH 1 to CH 2.
(20) Press VERTICAL MODE CH 1 pushbutton to off and VERTICAL MODE CH
2 pushbutton to on.
(21) Repeat technique of (14) and (18) above for CH 2. Switch between CH 1 and CH
2 as necessary, until both CH 2 and CH 1 aberrations are minimized. When minimized,
leave CH 2 selected.
(22) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI CH 2.
(23) Set oscilloscope calibrator LEVEL SINE mode for a 50 kHz output and adjust
amplitude for 6 divisions of vertical deflection. Adjust A and B SEC/DIV switch and CH 2
POSITION controls for suitable viewing.
NOTE
To perform step below; press oscilloscope calibrator EDIT
FIELD pushbutton as required to place underline under one of
the frequency digits.
(24) Increase oscilloscope calibrator frequency to 300 MHz.
Display amplitude
should be between 4.5 and 5 divisions.
(25) Sweep oscilloscope calibrator frequency from 300 to 250 MHz. If display
amplitude is not 4.4 divisions or greater, make necessary compromises to settings in (14)
and (18) above to obtain best flat top with proper bandwidth. HF ADJUST (R417) (fig. 1)
will have most effect on bandwidth.
(26) Move connection from TI CH 2 to TI CH 1 and press VERTICAL MODE CH 1
pushbutton to on and CH 2 VERTICAL MODE CH 2 off.
(27) Repeat technique of (22) through (25) for CH 1.
(28) If readjustment of HF ADJ R417 (fig. 1) was necessary, repeat (13) through (25) above.
23. Final Procedure
a. Press POWER pushbutton to OFF, and replace protective cover.