Operating Basics
42
P7380SMA 8 GHz Differential Probe Instruction Manual
DM
+
--
50
Ω
50
Ω
V
DM
+
--
V
T
V
CM
+
--
V
〈±
5.0 V
maximum)
〈±
5.0 V
maximum)
V+
V--
|V
+
-- V
T
|
<
5 V
|V
--
-- V
T
|
<
5 V
Figure 16: Probe maximum input limits
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.
Differential-Mode Signal Range.
The differential-mode signal range is the maximum voltage
difference between the plus and minus inputs that the probe can
accept without distorting the signal. The distortion from a voltage
that is too large can result in a clipped or otherwise distorted and
inaccurate measurement. The differential mode signal range is
dependent on the probe attenuator setting as shown in Figure 17 on
page 43.
For a more detailed description of the differential mode dynamic
range, see
Differential Measurement Topology
on page 48.