Operation; Connecting To The Test Instrument; Connecting To The Test Circuit - Teledyne HVD3102 Operator's Manual

Operation

Connecting to the Test Instrument

The HVD3102 and HVD3106probes have been designed for use with Teledyne LeCroy
oscilloscopes equipped with the ProBus interface. When you attach the probe output connector
to the oscilloscope's input connector, the instrument will:
Recognize the probe
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Set the oscilloscope input termination to 1 MΩ
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Activate the probe control functions in the oscilloscope user interface.
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NOTE: To ensure accurate measurements, connect the probe to the oscilloscope and allow to
warm up for at least 20 minutes. Then, perform an Auto Zero prior to connecting the probe to
the device under test.

Connecting to the Test Circuit

The HVD3102 and HVD3106 probes are ideally suited for applications where no ground is
available or where the location of a ground connection is unknown.
Two inputs are available at the probe tip to connect the probe to a circuit under test. For accurate
measurements, both the + and – inputs must be connected to the test circuit. Positive voltages
applied to the + input (red) relative to the – input (black) will deflect the oscilloscope trace toward
the top of the screen.
To maintain the high performance capability of the probe in measurement applications, exercise
care when connecting the probe. Increasing the parasitic capacitance or inductance in the input
paths may introduce a "ring" or may slow the rise time of fast signals. Input leads that form a
large loop area will pick up any radiated electromagnetic field that passes through the loop and
may induce noise into the probe inputs. Because this signal will appear as a differential mode
signal, the probe's common mode rejection will not remove it. This effect can be reduced by
twisting the input leads together to minimize the loop area.
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Operator's Manual
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