User manual

Waveform Analysis
R&S
®
Scope Rider RTH
77User Manual 1326.1578.02 ─ 04
Meas. type Symbol Description Graphic / formula Source
Base level Base Low level of the displayed waveform -
the lower maximum of the sample distri-
bution. The measurement requires at
least one complete period of the signal.
Base
analog, math,
reference
Top level Top High level of the displayed waveform -
the upper maximum of the sample distri-
bution. The measurement requires at
least one complete period of the signal.
Top
analog, math,
reference
Amplitude Amp Difference between the top level and the
base level of the signal. The measure-
ment requires at least one complete
period of the signal.
Top
Base
Amplitude
analog, math,
reference
Overshoot Over
in %
Overshoot of a square wave after a ris-
ing or falling edge. It is calculated from
measurement values top level, base
level, local maximum, local minimum,
and amplitude.
%100
Amplitude
TopMax
Over
local



%100
Amplitude
Min Base
Over
local



Top
Base
Amplitude
Over+
Over-
analog, math,
reference
Preshoot Pre
in %
Overshoot of a square wave before a ris-
ing or falling edge.
Same equations as overshoot
Top
Base
Amplitude
Pre+
Pre-
analog, math,
reference
AC AC
in V
RMS value of the AC part of a periodic
signal, calculated over all periods on the
display. The AC result is is derived from
the DC and AC+DC results.
DC
AC
N T
analog, math,
reference
DC DC
in V
Mean value of a periodic signal, calcula-
ted over all periods on the display. If no
complete period is available, only the
mean value of the visible waveform is
calculated.
DC
N T
analog, math,
reference
AC+DC AC+DC
in V
RMS value of a periodic signal, calcula-
ted over all periods on the display. If no
complete period is available, only the
RMS value of the visible waveform is
calculated.
DC
AC
N T
AC² + DC²
analog, math,
reference
Automatic Measurements