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Performance Verification
P6330 3.5 GHz Differential Probe Instructi on Manual
43
Rise Time
This procedure verifies that the probe meets rise time specifications.
Two rise times are measured; the test system, and the test system
with the probe included. The probe rise time is calculated using the
two measurements.
1. Connect the test equipment as shown in Figure 20.
1103
Oscilloscope
CH 1
input
CH 1
output
BNC-to-SMA adapter
015-0572-00
SMA cable 015-0562-00
SD24/ 80E04
CH1
CH2
SMA cable 174-1427-00
BNC-to-SMA adapter
015-0572-00
Figure 20: Test system rise time setup
2. Adjust the oscilloscope vertical sensitivity to 50 mV/div.
3. Turn on the TDR pulse on t he SD-24 or TDS8000 (Ch 2).
4. Adjust the oscilloscope vertical positioning to center the signal on
screen.
5. Adjust the oscilloscope horizontal sensitivity to 500 ps/div.
6. Adjust the oscilloscope horizontal positioning to place the rising
edge of the signal where it crosses the second vertical and center
horizontal graticule line s.
7. Use the oscilloscope measurement capability to display rise time.
Rise time is determined from the 10% and 90% amplitude points
on the waveform. Record the rise time as t
s.