Common Measurement Settings
R&S
®
FSVA3000/ R&S
®
FSV3000
309
User Manual 1178.8520.02 ─ 01
MultiMode Function and Offset Compensation for Modular RF Probes
The R&S RT-ZM probe family features the MultiMode function which allows you to
switch between single-ended, differential, and common mode measurements without
reconnecting or resoldering the probe.
Four different input voltages can be measured with the MultiMode feature:
●
P-Mode
: (pos.) Single-ended input voltage (V
p
)
Voltage between the positive input terminal and ground
●
N-Mode
: (neg.) Single-ended input voltage (V
n
)
Voltage between the negative input terminal and ground
●
DM-Mode
: Differential mode input voltage (V
dm
)
Voltage between the positive and negative input terminal
●
CM-Mode
: Common mode input voltage (V
cm
)
Mean voltage between the positive and negative input terminal vs. ground
The R&S
FSV/A supports all probe modes. The mode is configured in the
Offset compensation
The R&S RT-ZM probes feature a comprehensive offset compensation function. The
compensation of DC components directly at the probe tip even in front of the active
probe amplifier is possible with an extremely wide compensation range of ±16
V (±24
V
for P and N modes).
The offset compensation feature is available for every MultiMode setting:
MultiMode
setting
Offset compensation
Offset compen-
sation range
Application
DM-Mode
Differential DC voltage
±16 V
Probing single-ended signals, e.g. power
rails with high DC component and small AC
signal.
CM-Mode
Common mode DC volt-
age
±16 V
Measurements of signals with high common
mode levels, e.g. current measurements
with a shunt resistor.
Data Input and Output
