InfiniiMax III Cautions

Probe Theory
Probes

When making your measurements, you'll often need to probe different location on the DUT. You can safely move any of the following three probe heads without having to first break the amplifier-to-head connection:

  • N5445A differential browser head
  • N5439A ZIF head
  • N5444A 2.92 mm/3.5 mm/SMA head

The only exception is when the DUT is not grounded to the oscilloscope via the AC mains ground. In this case, connect the DUT ground to the oscilloscope ground before moving the probe. An example of a device having a floating ground would be a battery-powered DUT.

When probing with an N54441A solder-in probe head, always disconnect the probe head from the amplifier before moving the head to a new probing point. This is because some soldering-iron tips can hold a charge which can damage the probe amplifier.

Always disconnect an N54441A solder-in probe head from the probe amplifer before unsoldering, moving to a new position, and resoldering the head.