Keysight MSOX3054T User Manual

146 Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide
7 Digital Channels
Increasing the ground inductance (L), increasing the current (di) or decreasing the
transition time (dt), will all result in increasing the voltage (V). When this voltage
exceeds the threshold voltage defined in the oscilloscope, a false data
measurement will occur.
Sharing one probe ground with many probes forces all the current that flows into
each probe to return through the same common ground inductance of the probe
whose ground return is used. The result is increased current (di) in the above
equation, and, depending on the transition time (dt), the common mode voltage
may increase to a level that causes false data generation.
Figure 25 Common Mode Input Voltage Model
V = L
di
dt
Z
in
Z
in
i
n
i
2
+i
2
i
1
i
1
+i
n
+i
n
Z
in
Probe 1
Probe
Ground
Probe 2
Probe N
L (GND)
Vn (Common Mode)

Keysight MSOX3054T Specifications

General

Brand	Keysight
Model	MSOX3054T
Category	Test Equipment
Language	English