Rohde & Schwarz Scope Rider RTH1002, User Manual

Page: 81 / 530

Waveform Analysis
R&S
®
Scope Rider RTH
81 User Manual 1326.1578.02 ─ 12
Meas. type Symbol Description Graphic / formula Source
Negative pulse
width t-
in s
Duration of the first negative pulse: time
between a falling edge and the following
rising edge measured on the 50% level.
50%
t- Analog, math,
reference, logic
Positive duty cycle Dty+
in %
Width of the first positive pulse in relation
to the period in %. The measurement
requires at least one complete period of
the signal. Dty+ = t+ / T * 100%
100% 0% T
t+
Analog, math,
reference, logic
Negative duty cycle Dty-
in %
Width of the first negative pulse in rela-
tion to the period in %. The measure-
ment requires at least one complete
period of the signal. Dty- = t- / T * 100%
100% 0% T
t-
Analog, math,
reference, logic
Delay
Δ
t
in s
Time difference between two slopes of
the same or different waveforms, mea-
sured on the 50% level.
Not available for cursor measurements
t
S2
S1
2 sources:
analog, math,
reference, logic
Phase
∡
in °
Phase difference between two wave-
forms, measured on the 50% level.
Not available for cursor measurements
Phase =
Δ
t / T * 360°
t
S2
S1
100% 0%
2 sources:
analog, math,
reference, logic
4.2.3.2 Amplitude Measurements
The unit of most amplitude measurement results depends on the measured source.
Meas. type Symbol Description Graphic / formula Source
Mean value Mean Arithmetic average of the complete dis-
played waveform.



N
k
k
x
N
1
1
Mean
analog, math,
reference, logic
RMS value RMS RMS (Root Mean Square) value of the
voltage of the complete displayed wave-
form.



N
k
k
x
N
1
2
1
RMS
analog, math,
reference
Crest factor Crest The crest factor is also known as peak-
to-average ratio. It is the maximum value
divided by the RMS value of the dis-
played waveform.
RMS
| |
Max
Crest
k
x

analog, math,
reference
Automatic Measurements