Edge Abberation Verification - Fluke 5520A Service Manual

5520A
Service Manual
Calibrator Mainframe Output
Voltage
250 mV
500 mV
1 V
2.5 V

6-123. Edge Abberation Verification

The following equipment is needed for this procedure:
Before you begin this procedure, verify that the 5520A-SC300 is in the edge mode (the
Edge menu is displayed), and program it to output 1 V p-p @ 1 MHz. Press
activate the output.
Connect the Calibrator Mainframe to the oscilloscope as in Figure 6-22. 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 SC300 falls within the typical specifications shown in Table 6-51.
6-94
Rise time
measures
between
these two
points
Figure 6-23. Edge Rise Time
Table 6-50. Edge Rise Time Verification
Frequency
1 MHz
1 MHz
1 MHz
1 MHz
Tektronix 11801 oscilloscope with SD22/26 sampling head
Output cable provided with the SC300
90%
10%
DSO
A
Vertical
11801
Axis
Reading
(mV/div)
20.0
50.0
100.0
200.0
om033i.eps
B
Tolerance
Corrected
Reading
< 400 ps
< 400 ps
< 400 ps
< 400 ps
to