Teledyne LeCroy DXC100A - Manual (Page 14)

DXC100A Differential Probe Pair
12 922259-00 Rev A
8. +Input X10 HF Transient Response
a. Press the –Input Off button.
b. Set the BW Limit to Full.
c. Press the X1 Gain button.
d. Set the oscilloscope to 20mV/div.
e. Connect the +probe to the pulse generator’s fast rise output using a 50
Ohm termination and the BNC to probe tip adaptor.
f. Press the V
Diff
button to enable V
Diff
mode.
g. Position the trace 2½ divisions above the centerline using the PVG (-
00.500).
h. Press the +Input DC button.
i. Set the oscilloscope sweep speed to 10ns/div.
j. Adjust pulse generator for 5 divisions of a 100kHz signal.
k. Adjust R1 (+X10 HF1) and R7 (+X10 HF2) for minimum aberrations at the
top of the waveform and a system rise time of less than 3.5ns.
9. X10 HF CMRR
a. Continuing from the previous step, disconnect the probe from the pulse
generator.
b. Connect both probes to the pulse generator’s fast rise output using a 50
Ohm termination, the BNC T, and two probe tip to BNC adapters.
c. Disable V
Diff
mode by pressing the V
Diff
button.
d. Set the oscilloscope to 5mV/div.
e. Press the –Input DC button.
f. Adjust R2 (-X10 HF1) and R8 (-X10 HF2) for minimum displayed signal.
The residual displayed amplitude should be less than 15mV (3.0
divisions) peak to peak.