TB 9-6625-1200-35
(5) Repeat technique of (1) and (2) above. If oscilloscope calibrator Err displayed
does not indicate within 5 percent, perform b(4) below.
(6) Turn horizontal POSITION control until center portion of magnified sweep has
marker aligned behind 2nd vertical graticule line. If 8th marker from 2nd vertical line is not
aligned behind 10th vertical graticule line within 2.5 minor divisions, perform b(5) below.
(7) Set oscilloscope calibrator to standby.
(1) Adjust R512 for best compromise of TIME/DIV switch positions from 1 mSEC
through 20 SEC (R).
(2) Adjust C440A for best compromise of TIME/DIV switch positions from 10 SEC
through 1 SEC (R).
(3) Adjust C537 for .5 SEC position of TIME/DIV switch (R).
NOTE
If C537 was adjusted, recheck 10 SEC through 1 SEC
TIME/DIV switch positions.
(4) Adjust C511 for eight major divisions between 2nd and 10th markers (R).
NOTE
If b(2) and (3) above are performed, repeat a(4) through (6)
above.
(5) Adjust C527 until 8th marker from 2nd vertical graticule line is aligned behind
10th vertical graticule line (R).
12. High Frequency
Compensation and
Risetime
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 output to TI CH
1 input, using cable and 50 termination.
(2) Set both VOLTS/DIV switches to .05 and variable control to CAL.
(3) Pull out X10 MAG switch and set TIME/DIV switch to .5 SEC.
(4) Select oscilloscope calibrator FAST EDGE function and set to 100 kHz. Center
displayed pulse vertically on crt.
(5) Adjust LEVEL control for a stable display triggered on rising portion of pulse.
If displayed pulse does not have a square leading corner and a flat top with aberrations
within 1.5 minor divisions, perform b(1) below.
(6) Measure risetime, using standard risetime technique. Risetime will be 24 ns or
less.