R&S RTO6 - 5.2 Horizontal; 5.2.1 Setup settings

Acquisition and waveform setup
R&S
®
RTO6
119User Manual 1801.6687.02 ─ 05
Voltage between the positive and negative signal sockets
●
Positive single-ended input voltage (V
p
)
Voltage between the positive signal socket and the ground socket
●
Negative single-ended input voltage (V
n
)
V
oltage between the negative signal socket and the ground socket
●
Common mode input voltage (V
cm
)
Mean voltage of positive and negative signal sockets referred to the ground socket,
respectively
Two of these voltages are independent values, the other two can be calculated:
2
np
cm
npin
VV
V
VVV



R&S RT-ZD probes detect only differential input voltages and provide it to the oscillo-
scope. Common mode signals are suppressed by the probe. This characteristic is
described by the common mode rejection ratio (CMRR):
GainCommonMode
alGainDifferenti
CMRR 
In addition, the R&S ProbeMeter of R&S RT-ZD differential probes can measure differ-
ential and common mode DC voltages. The measurement result is displayed on the
oscilloscope's screen. The common mode measurement of the R&S ProbeMeter
allows you to check the input voltage relative to ground. Thus, the CM measurement is
a convenient way to detect breaches of the operating voltage window
, and the reason
of unwanted clippings.
5.2
Horizontal
The "Horizontal" dialog provides the time base configuration for channel and spectrum
waveforms.
5.2.1 Setup settings
Access: "Menu" > "Horizontal" > "Setup" tab.
Horizontal