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MATCHING PROCEDURE FOR ÷10 PLUG-ON EXTERNAL ATTENUATOR
EQUIPMENT REQUIRED
Test Oscilloscope
Signal Source
²
The ÷10 and ÷20 Plug-on attenuators provided as standard
accessories with the AP034 are calibrated to match the specific
probe they are shipped with. Individual probes will have small
variations in parasitic capacitance within the input circuits. To
obtain maximum common mode rejection performance, the
attenuators are calibrated to match a specific probe during the
manufacturing process. In order to preserve the maximum
Common
Mode
Rejection,
attenuators between probes.
The Plug-on AC coupling adapter is not matched to a specific
probe and, therefore, does not need to be matched when
interchanged.
If the ÷10 or ÷20 Plug-on attenuators become accidentally mixed
between probes, you can use the procedure listed below to
restore the compensation match. This adjustment does not affect
any of the parameters in the warranted specifications. Therefore,
the required test equipment does not need to be calibrated.
The AP033 and AP034 Active Differential Probes have
different input capacitance. The ÷ 10 Plug-on attenuator
supplied with model AP033 cannot be properly adjusted
for use with model AP034. Make sure that the attenuator
is marked "AP034" before attempting this procedure.
The oscilloscope must support ProBus. Otherwise use a non-
ProBus oscilloscope and ADPPS power supply.
Low frequency square wave: frequency from 50 Hz to 5 kHz,
amplitude from 1 V to 10 V. The output waveform must have a
square corner and flat top with minimum overshoot suitable for
adjusting compensation. The generator should have trigger
output, or use a BNC Tee connector and separate BNC cable
ISSUED: January 2000
$3 $FWLYH 3UREH
do
not
interchange
Note
external
AP034-OM-E Rev D
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