Fluke 5500A, Service Manual

Page: 165 / 296

SC600 Option
Verification
6
6-39
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.
Table 6-27. Edge Aberrations
Time from 50% of Rising Edge Typical Edge Aberrations
0 - 2 ns <32 mV (3.2%)
2 - 5 ns <22 mV (2.2%)
5 - 15 ns <12 mV (1.2%)
>15 ns <7 mV (0.7%)
6-56. Tunnel Diode Pulser Drive Amplitude Verification
This procedure uses the following equipment:
•
Hewlett-Packard 3458A Digital Multimeter
•
BNC(f) to Double Banana adapter
•
BNC cable supplied with the SC600
Set the Calibrator Mainframe in Scope Cal mode, Edge. Proceed with the following
steps:
1. Connect the Calibrator Mainframe’s SCOPE connector to the HP 3458A input, using
the BNC cable and the BNC(f) to Double Banana adapter. Refer to Figure 6-2 for the
proper setup connections.
2. Activate the TD Pulser output by pushing the TDPULSE blue softkey. The output
should now be at 80 V peak-to-peak, 100 kHz, STANDBY.
3. Set the HP 3458A to DCV, NPLC = .001, LEVEL 1, TRIG LEVEL, and the DELAY
to .00012 for measuring the topline and DELAY to .00007 for measuring the
baseline. Manually range lock the HP 3458A to the 100 V dc range.
4. Change the Calibrator Mainframe output frequency to 10 kHz. Push the operate key,
and use the HP 3458A to measure the topline and baseline.
5. The peak-to-peak value is the difference between the topline and baseline. Record
these values in Table 6-28, and compare against the listed tolerance.
Table 6-28. Tunnel Diode Pulser Amplitude Verification
Calibrator
Mainframe
Edge Output
HP 3458A
Range
Topline
Reading
Baseline
Reading
Peak-to-Peak Tolerance
(
±
V)
80 V, 10 kHz 100 V dc 1.6