Fluke 5520A Service Manual page 233

Tek 11801
With SD26 Sampling Head
3 dB Attenaator
3.5 mm (m/f)
BNC(F) to
3.5 mm (m)
Adapter
Figure 6-22. Edge Rise Time Verification Setup
The Calibrator Mainframe should be in SCOPE mode, with the Edge menu on the
display. Press on the Calibrator Mainframe to activate the output. Press the softkey
under TRIG to select the TRIG/1 External Trigger output. Program the Calibrator
Mainframe to output 250 mV @ 1 kHz. Set the DSO to these parameters:
Digital Storage Oscilloscope Setup
Main Time Base position (initial)
Horizontal scale
Measurement Function
1. Program the Calibrator Mainframe to output the voltage and frequency listed in
Table 6-50. Press
2. Change the vertical scale of the DSO to the value listed in the table. Adjust the main
time base position and vertical offset until the edge signal is centered on the display.
Record the rise time measurement in column A of Table 6-50. Refer to Figure 6-23.
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
2
A) - (SD-22/26 rise time)
4. The edge rise time measured should be less than the time indicated in Table 6-50.
SC300
Cable
40 ns
500 ps/div
Rise Time
on the Calibrator Mainframe to activate the output.
2
).
SC300 Option
Verification
5520A-SC300
5520A CALIBRATOR
NORMAL AUX SCOPE
V, , ,RTD A, -SENSE, AUX V
OUT
HI
1000V
20V
1V PK
RMS RMS
MAX
MAX MAX
150V
LO
PK
MAX
TRIG
20V
RMS
MAX
20V
PK
20A SHELLS
GUARD
NOT MAX
GROUNDED
20V PK MAX TC 20V PK MAX
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