Fluke 5500A, Руководство по обслуживанию

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5500A
Service Manual
6-38
3. Correct the rise time measurement by accounting for the SD-22/26 sampling head’s
rise time. The SD-22/26 rise time is specified as <28 ps. Column B = sqrt((Column
A)
2
- (SD-22/26 rise time)
2
).
4. The edge rise time measured should be less than the time indicated in Table 6-26.
90%
10%
Rise time
measures
between
these two
points
om033i.eps
Figure 6-8. Edge Rise Time
Table 6-26. Edge Rise Time Verification
Calibrator Mainframe Output
DSO
Vertical
Axis A B
Voltage Frequency (mV/div)
11801
Reading
Corrected
Reading Tolerance
250 mV 1 MHz 20.0 <300 ps
250 mV 10 MHz 20.0 <350 ps
500 mV 1 MHz 50.0 <300 ps
500 mV 10 MHz 50.0 <350 ps
1 V 1 MHz 100.0 <300 ps
1 V 10 MHz 100.0 <350 ps
2.5 V 1 MHz 200.0 <300 ps
2.5 V 10 MHz 200.0 <350 ps
6-55. Edge Abberation Verification
The following equipment is needed for this procedure:
•
Tektronix 11801 oscilloscope with SD22/26 sampling head
•
Output cable provided with the SC600
Before you begin this procedure, verify that the 5500A-SC600 is in the edge mode (the
Edge menu is displayed), and program it to output 1 V p-p @ 1 MHz. Press
O
to
activate the output.