OperatingBasics
P6330 3.5 GHz Differential Probe Instruction Manual 11
Maximum Input Voltage
The maximum input voltage is the maximum voltage t oground tha t
the inputs can withstand without damaging the input circuitry of the
probe.
CAUTION. Toavoid damaging t he inputs of the P6330 differential
probe, do not apply morethan ±15 V (DC + peak AC) bet ween each
input and ground.
Common-Mode Signal Range
The common-mode signal range is the maximum voltage that you
canapplytoeachinput, with respect to earth ground, without
saturating the input circuitry of the probe. A common-mode voltage
thatexceedsthecommon-modesignal range may produce an
erroneous output waveform even when the differential-mode
specificationis met. For Specifications, refer to page 25.
Differential-Mode Signal Range
Thedifferential-modesignal range is the maximum voltage
difference between the plus and minus inputs that the probe can
acceptwithout distorting the signal. The distortion from a voltage
thatistoolargecan result in a clipped or otherwise distortedand
inaccuratemeasurement.For Specifications, refer to page 25.
Common-Mode Rejection
Thecommon-moderejection ratio (CMRR) is the ability of a probe
to reject signals that are common to both inputs. More precisely,
CMRRisthe ratio of the differential gain to the common-mode gain.
Thehighertheratio,thegreaterthe ability to reject common-mode
signals.
Common-mode rejection decreases as the input frequency increa ses.
Figure 11 on page 28 isa pl ot oft ypical CMRR of the probe versus
input frequency. For additional information about CMRR, see
page 20.