Characteristics of Differential Probes
R&S
®
RT
‑
ZD10/20/30
38
User Manual 1410.4550.02 ─ 05
●
Probing on ground-referenced signals. In this case, the common mode com-
ponent is always equal to half of the input voltage.
5.2
Dynamic Range and Operating Voltage Window
Two separate specifications are necessary to characterize the permissible input
voltage range of a differential voltage probe:
●
The dynamic range (or "differential mode range") designates the maximum dif-
ferential voltage V
in
that may occur between the positive and negative signal
pin.
●
At the same time, the two voltage values at each of the two signal pins V
p
and
V
n
referenced to the common ground must not exceed a specific limit value.
This limitation is referred to as the operating voltage window (some manufac-
turers also use the less precise term "common mode range" for the same
parameter).
If one of these ranges is exceeded, an unwanted signal clipping may occur.
Figure 5-2: Operating voltage window
Dynamic Range and Operating Voltage Window