Fluke 5500A, Service Manual

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5500A
Service Manual
6-94
5500A CALIBRATOR
20V PK
MAX
HI
LO
TC
TRIG
OUT
1000V
RMS
MAX
20V
RMS
MAX
1V PK
MAX
20V PK
MAX
NORMAL AUX
SCOPE
V, ,
RTD
A, -SENSE,
AUX V
200V PK
MAX
BNC(F) to
3.5 mm (m)
Adapter
3 dB Attenaator
3.5 mm (m/f)
Tek 11801
With 5D26 Sampling Head
5500A-SC300
SC300
Cable
om064f.eps
Figure 6-22. Edge Rise Time Verification Setup
The Calibrator Mainframe should be in SCOPE mode, with the Edge menu on the
display. Press
O
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) 40 ns
Horizontal scale 500 ps/div
Measurement Function Rise Time
1. Program the Calibrator Mainframe to output the voltage and frequency listed in
Table 6-56. Press
O
on the Calibrator Mainframe to activate the output.
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 6-56. 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
A)
2
- (SD-22/26 rise time)
2
).
4. The edge rise time measured should be less than the time indicated in Table 6-56.