Teledyne LeCroy AP033 - Manual (Page 33)

Operator’s Manual
922260-00 Rev A 27
Preliminary Procedure
1. Connect the AP033 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 AP033 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 AP033 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: The operation of the controls of the AP033 may differ depending on which version of
firmware is loaded in the Teledyne LeCroy oscilloscope. In versions 8.1.0 and higher, the offset
controls on the front panel of the probe are disabled. The AP033 offset is controlled by the OFFSET
knob in the oscilloscope CHANNEL section. In software versions 7.6.0 to 8.0.x, probe offset is
controlled through one of the menu knobs while the “Coupling” menu is displayed. In versions
7.8.0 and higher, you have the option of selecting manual or automatic gain control. The
oscilloscope defaults to AUTOMATIC mode. This procedure is best performed with the
oscilloscope set to MANUAL gain control. Gain control can be set via the “Coupling” menu or, for X-
Stream oscilloscopes, the Channel dialog for the channel to which the probe is connected.
A. Check Gain Accuracy
1. From the oscilloscope display, select the channel that the AP033 is connected to (channel 1. Set
the AP033 Atten/Gain to Manual, the Probe Gain to X1, and the Probe Atten to /1. (/1 is the
same as ÷1)
2. If necessary, set the probe offset to 0.000 V by rotating the OFFSET knob in the CHANNEL
section of the oscilloscope.