Connecting The Probe To The Test Instrument; Connecting The Probe To The Test Circuit - LeCroy AP034 Instruction Manual

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CONNECTING THE PROBE TO THE TEST INSTRUMENT

CONNECTING THE PROBE TO THE TEST CIRCUIT

AP034-OM-E Rev D
The input circuits in the AP034 Active Differential
Probe incorporate components that protect the
probe from damage resulting from electrostatic
discharge (ESD). Keep in mind that this is an
active probe, and it should be handled carefully
to avoid damage. When using the AP034 Active
Differential Probe, you are advised to take
precautions against potential instrument damage
due to ESD.
When you are using the AP034 Active Differential Probe with a
LeCroy Oscilloscope equipped with ProBus, attach the probe
output connector to the oscilloscope input connector. The
oscilloscope will recognize the probe, set the oscilloscope input
termination to 50 Ÿ DQG DFWLYDWH WKH SUREH FRQWURO IXQFWLRQV LQ
the user interface.
To use the AP034 Active Differential Probe with instrumentation
not equipped with a ProBus interface, it is necessary to use the
ADPPS Power Supply. Attach the ADPPS connector to the probe
output connector. The output connector of the ADPPS is a
standard male BNC that can be directly connected to another
instrument. If necessary, the output of the ADPPS can be
interconnected with a 50 Ÿ FRD[LDO FDEOH 7R PLQLPL]H WKH HIIHFWV
of skin loss, this cable should be 1 m or less in length. The
AP034 Active Differential Probe is designed to drive a 50 Ÿ ORDG
The gain will be uncalibrated if the output is not correctly
terminated. If you are using the probe with an instrument with a
high input impedance, place a 50 Ÿ %1& LQOLQH WHUPLQDWRU RQ WKH
instrument input before attaching the ADPPS.
At the probe tip, two inputs and a ground connection are
available for connecting the probe to a circuit under test. For
accurate measurements, both the + and – inputs must always be
ISSUED: January 2000
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Caution
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