Operating Basics; Input Voltage Limits; Maximum Input Voltage; Common-Mode Signal Range - Tektronix P6246 Mode D'emploi

Operating Basics

This section discusses operating considerations and probing
techniques. For more detailed information about differential
measurements and common-mode rejection (CMRR), see the
Reference section on page 20.

Input Voltage Limits

The P6246 and P6247 differential probes are designed to probe
low-voltage circuits. Before probing a voltage, take into account the
limits for maximum input voltage, the common-mode signal range,
and the differential-mode signal range.

Maximum Input Voltage

The maximum input voltage is the maximum voltage to ground that
each input can withstand without damaging the input circuitry of the
probe.
CAUTION. To avoid damaging the inputs of the P6246 and P6247
differential probes, do not apply more than ± 25 V (DC + peak AC)
between each input and ground.

Common-Mode Signal Range

The common-mode signal range is the maximum voltage that you
can apply to each input, with respect to earth ground, without
saturating the input circuitry of the probe. A common-mode voltage
that exceeds the common-mode signal range may produce an
erroneous output waveform even when the differential-mode
specification is met. For specifications, refer to page 25.
To verify the common-mode signal is within specification, set the
probe to ÷ 10, temporarily connect one of the probe inputs to
ground, and connect the other probe input to one output of the
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P6246 & P6247 Instructions