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Table 12. B Sweep Timing
Table 15. B Delay Time Position Accuracy

Calibration Procedure For Oscilloscope An/Usm-488 And Type 2235 Page Navigation
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TB 9-6625-2139-24
Table 13. B Sweep Timing (X10 Out)
Test instrument
Test instrument
Oscilloscope
Oscilloscope
linearity
SEC/DIV
calibrator
calibrator
Test instrument
0.1 division over any
switch settings
Err display limits
MARKER output
adjustments
2 center 8 divisions
settings
r%
A
B
Yes
No
b(29) thru (33)
10 nS/D
3
0.1 Ps
0.05 Ps
(26) Set A AND B SEV/DIV switches and oscilloscope calibrator output as listed in
first row of table 14.
(27) Adjust horizontal POSITION control to aline the 1st time marker that is 25 ns
beyond start of sweep with the 2d vertical graticule line.
(28) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton to
align 10th time marker with 10th vertical graticule line. Oscilloscope calibrator err display
will indicate and linearity will be within limits specified in table 14.
(29) Repeat technique of (27) and (28) above for settings listed in table 14.
Oscilloscope calibrator err display and linearity will indicate within limits listed in
table 14.
Table 14. B Sweep X10 Mag Timing
Test instrument
Oscilloscope
Test instrument
Oscilloscope
linearity
SEC/DIV
calibrator
calibrator
0.1 division over any
MARKER
Err display limits
switch settings
2 center 8 divisions
output settings
A
B
r%
Yes
No
0.2 Ps
0.1 Ps
10
nS/D
3
0.5 Ps
0.2 Ps
20
nS/D
3
1  Ps
0.5 Ps
50
nS/D
3
2  Ps
1  Ps
0.1
PS/D
3
5  Ps
2  Ps
0.2
PS/D
3
10
Ps
5  Ps
0.5
PS/D
3
20
Ps
10
Ps
1
PS/D
3
50
Ps
20
Ps
2
PS/D
3
0.1 ms
50
Ps
5
PS/D
3
0.2 ms
0.1 ms
10
PS/D
3
0.5 ms
0.2 ms
20
PS/D
3
1  ms
0.5 ms
50
PS/D
3
2  ms
1  ms
0.1
mS/D
3
5  ms
2  ms
0.2
mS/D
3
10
ms
5  ms
0.5
mS/D
3
20
ms
10
ms
1
mS/D
3
50
ms
20
ms
2
mS/D
3
0.1 sec
50
ms
5
mS/D
3
A ONLY
(30) Position controls as listed in (a) through (d) below:
(a) Xl0 CAL control to in position.
21


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