Teledyne LeCroy AP034 - Manual (Page 33)

Operator’s Manual
922261-00 Rev A 27
Preliminary Procedure
1. Connect the AP034 Active Differential Probe to the female end of the ProBus Extension Cable.
Connect the male end of the ProBus extension cable to Channel 1 of the oscilloscope.
2. Turn the oscilloscope on and allow at least a 30- minutes warm-up time for the AP034 and test
equipment before performing the Verification Procedure.
3. Turn on the other test equipment and allow these to warm up for the time recommended by
the manufacturer.
4. While the instruments are reaching operating temperature, make a photocopy of the
Performance Verification Test Record (located at the end of this section), and fill in the
necessary information.
The warranted characteristics of the AP034 Active Differential Probe are valid at any temperature
within the Environmental Characteristics listed in the Specifications. However, some of the other
test equipment used to verify the performance may have environmental limitations required to
meet the accuracy needed for the procedure. Make sure that the ambient conditions meet the
requirements of all the test instruments used in this procedure.
Procedure
NOTE: Correct operation of the AP034 controls requires oscilloscope software version 8.1.0 or
higher. The use of earlier versions is not recommended. You can verify the software version in the
test oscilloscope by pressing the SHOW STATUS button, then selecting the System menu option.
Contact your local Teledyne LeCroy representative if the software in your oscilloscope requires
updating.
A. Check Gain Accuracy
1. From the oscilloscope display, select the channel that the AP034 is connected to (channel 1),
then select the “Coupling” menu. Set the Coupling to DC 1 MΩ. (If the only choice available is
AC 1 MΩ, remove the Plug-on AC Coupling adapter from the probe tip.)
2. If necessary, set the probe offset to 0.000 V by rotating the OFFSET knob in the CHANNEL
section of the oscilloscope.
3. Using a BNC female-to-female adapter, connect one end of a BNC cable to the probe end of the
ProBus Extension Cable. Connect the Precision 50Ω Terminator to the other end of the BNC
cable.