Performance Verification
P6330 3.5 GHz Differential Probe Instruction Manual 45
8. Disconnect the BNC-SMA adapter from the CH 1 input of the
1103 power supplya ndt he SMAcable .
9. Connect the SMA cable to one input of the probe cal fixture, and
the terminator to the other input of the probe cal fixture.
10.Connec t the probe to the 1103power supply channel 1 input.
11. Turn off the offset control on channel 1 of the 1103 power supply.
12.Using the probe positione r,probe the DM test points on the probe
calibration fixture. Compare your display to Figure 22 to verify
thatyouhaveavalidconnectionwith both pins.
(--)pin not making contact
Bothpins in contact
20%G ain
difference
500ps/div
Figure 22: Verifyingboth probe pins are contacting the DM test points
13.Adjust the oscilloscope vertical scaleto10mV/div,averaging on.
14.Adjust the oscilloscope horizontalpositioningto place the rising
edge of the signal so that it crosses the second vertical and center
horizontal graticule lines.
15.Use the oscilloscope measurementcapabilitytodisplayrise time.
Risetimeisdeterminedfrom the 10% and 90% amplitude points
onthewaveform.Record the rise time as ts+p.
16.Calculate the probe rise time using the followingformula:
tp
=t(s+p)
2−ts
2
Ꭹ17.Record the calculated probe rise time on the test record.