beautypg.com

Cleaning, Probe compensation – Teledyne LeCroy PP016 User Manual

Page 8

background image

PP016 Passive Probe

6

922209-00 Rev A

Cleaning

The outside of the probe should cleaned with a soft cloth dampened with either
deionized / distilled water or isopropyl alcohol. Allow the surface to dry completely
before returning the probe to service. Never immerse the probe in any liquid.

Probe Compensation

Proper compensation of the probe is required to assure good amplitude accuracy in
the dynamic portions of the waveform being measured. LF compensation matches
the probe to differences in oscilloscope input capacitance. The LF compensation
should always be checked and adjusted as needed when first connecting a passive
probe to the oscilloscope input. HF compensation matches time constants within
the probe to compensate for normal component tolerances. It is typically not
necessary to adjust HF compensation unless the probe is being used with an
oscilloscope with large differences in input characteristics than the oscilloscope
model it was designed for.

LF compensation is performed by connecting the input of the probe to a low
frequency square wave, such as the oscilloscope calibrator signal set to 1 kHz. The
compensation is adjusted by rotating the adjustment accessible through the small
hole in the center of the housing near the BNC connector. Use the tool supplied
with the probe for this adjustment.