Teledyne LeCroy AP034 - Manual (Page 40)

AP034 Active Differential Probe
34 922261-00 Rev A
Adjustment Procedure
Introduction
You can use this procedure to adjust the AP034 Active Differential Probe to meet the warranted
specifications. This procedure should only be performed if the instrument fails the Performance
Verification tests. If the probe cannot be adjusted to meet the Performance Verification limits,
repair may be necessary. To ensure instrument accuracy, check the calibration of the AP034 Active
Differential Probe every year. Before calibration, thoroughly clean and inspect this unit as discussed
in the “Cleaning” section.
Completion of each step in the Adjustment Procedure ensures that the differential probe meets
specifications. Some of the adjustments interact with other parts of the circuitry. Therefore, it is
necessary that all adjustments be performed in the order listed. For best overall instrument
performance, make each adjustment to the exact setting, even when adjustment is within the
limits stated in the procedure.
Adequate guard bands were designed into the AP034 Active Differential Probe to ensure that it will
meet or exceed published specifications over the entire operating temperature range. To continue
to meet the environmental specifications, all adjustments must be performed in a controlled
environment with an ambient temperature of 25 ±5
° C . The AP034 Active Differential Probe must
also be at stable operating temperature before performing adjustments.
CAUTION: The adjustment procedure will require removal of the probe covers. These covers
are part of the ESD protection system of the AP034 Active Differential Probe. To protect the probe,
you should perform the entire procedure on a static dissipating work surface Wear an antistatic
grounding wrist strap and follow standard static control procedures.
The probe tip housing provides physical rigidity to the input pins of the probe. When the covers are
removed, observe extra caution to avoid breaking the probe tip receptacles when mating the probe
to the calibration fixture.