Edge Abberation Verification - Fluke 5520A Service Manual

5520A
Service Manual
4. The edge rise time measured should be less than the time indicated in Table 6-26.
Calibrator Mainframe Output
Voltage
250 mV
250 mV
500 mV
500 mV
1 V
1 V
2.5 V
2.5 V

6-55. Edge Abberation Verification

The following equipment is needed for this procedure:
Before you begin this procedure, verify that the SC600 is in the edge mode (the Edge
menu is displayed), and program it to output 1 V p-p @ 1 MHz. Press
the output.
Connect the Calibrator Mainframe to the oscilloscope refering to Figure 6-7. Set the
oscilloscope vertical to 10 mV/div and horizontal to 1 ns/div. Set the oscilloscope to look
at the 90% point of the edge signal; use this point as the reference level. Set the
oscilloscope to look at the first 10 ns of the edge signal with the rising edge at the left
edge of the oscilloscope display.
With these settings, each vertical line on the oscilloscope represents a 1% aberration.
Determine that the SC600 falls within the typical specifications shown in Table 6-27.
6-38
Rise time
measures
between
these two
points
Table 6-26. Edge Rise Time Verification
Frequency
1 MHz
10 MHz
1 MHz
10 MHz
1 MHz
10 MHz
1 MHz
10 MHz
Tektronix 11801 oscilloscope with SD22/26 sampling head
Output cable provided with the SC600
90%
10%
Figure 6-8. Edge Rise Time
DSO
A
Vertical
11801
Axis
Reading
(mV/div)
20.0
20.0
50.0
50.0
100.0
100.0
200.0
200.0
om033i.eps
B
Tolerance
Corrected
Reading
< 300 ps
< 350 ps
< 300 ps
< 350 ps
< 300 ps
< 350 ps
< 300 ps
< 350 ps
to activate