Keysight InfiniiMax III+ Series, User Manual

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148 InfiniiMax III+ Series Probes User’s Guide
8
Performance Verification for N7000-Series Probes
Figure 107 Measuring the Differential Input Resistance of Solder-In Probe Head
3
Connect the probe amplifier to the oscilloscope or power supply so it is
powered.
4
Connect the ZIF or solder-in probe head to the probe amp and insert it into the
PV fixture as shown Figure 107 .
5
Depress the pincher fingers on the PV fixture so they open and carefully insert
the tip wires under the pincher. Release the pincher once the tips are inserted.
6
As shown in Figure 107 , measure the DC input resistance between the banana
plugs. Since one tip wire is connected to the signal line and the other tip is
connected to the PV fixture ground, this is a measurement of the differential
input resistance. It should be 100 k
W
±2% (98 to 102 k
W
).
7
To measure the single-ended input resistance, measure the resistance between
the signal plug of the banana adapter and the probe amplifier ground, which
can be accessed as shown in Figure 108 (through the vent window of the probe
amplifier).
Figure 108 Measuring the Single-Ended Input Resistance the Solder-In Probe Head