TB 9-6625-2240-35
(4) Set DELAY TIME POSITION dial to 1.00.
(5) Adjust C1023 (fig. 2) to align time marker with center vertical graticule line (R).
(6) Set DELAY TIME POSITION dial to 9.00.
(7) Readjust C1023 (fig. 2) for best in-tolerance condition between DELAY TIME
POSITION dial readings of 1.00 and 9.00 to align time marker with center vertical
graticule line (R).
(8) Set DELAY TIME POSITION dial to 1.00.
(9) Adjust C1025 (fig. 2) to align time marker with center vertical graticule line (R).
(10) Set DELAY TIME POSITION dial to 9.00.
(11) Readjust C1025 (fig. 2) for best in-tolerance condition between DELAY TIME
POSITION dial readings of 1.00 and 9.00 to align time marker with center vertical
graticule line (R).
11. Risetime and Bandwidth
a. Performance Check
(1) Press HORIZONTAL DISPLAY A (A LOCKS KNOBS for SN B250000 and
above) pushbutton (in). Connect oscilloscope calibrator CHAN 1 to TI CH1 through 10x
attenuator and 50Ω termination.
(2) Press and release 20 MHz BW/TRIG VIEW pushbutton to full bandwidth and
press VERT MODE CH1 pushbutton (in).
(3) Set TI VOLTS/DIV CH1 switch to 5m (10m for Tektronix, Type 475A).
(4) Use technique of step 5 below for TI settings and oscilloscope calibrator output
settings listed in table 14.
(5) Rotate oscilloscope calibrator knob below EDIT FIELD pushbutton to adjust
amplitude for 5 divisions of vertical deflection on TI. Square wave will have aberrations not
Oscilloscope calibrator
EDGE settings
Test instrument
Aberration limits
TIME/DIV
minor division or
CH1
switch
Portion of
minor division
adjustments
settings
pk-pk
(R)
(s)
affected
(<)
AMPLITUDE
10 ns from
200 mVpp
1 MHz
0.1
1
C175, R175 (fig. 1)
leading edge
0.05
2 ns from
C133, R133 (fig. 1)
leading edges
Front corner
C112, R112 (fig. 1)
200 mVpp
100 kHz
1
Top and corner
.5 s
See footnotes at end of table.
