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Measurements
R&S
®
RTM20xx
81
User Manual 1317.4726.02 ─ 01
Duty Ratio
Measures the positive and negative duty cycles. The duty cycle is the ratio between the
duration of a positve pulse (high active) or a negative pulse (low-active) and the period
of a rectangular waveform. The measurement requires at least one complete period of
the signal between cursor 1 and cursor 2. Pulse duration and period are measured at
cursor 3.
Results: Dty+, Dty- (in %)
Burst Width
Measures the duration of a burst. Two vertical cursors mark the beginning and the end
of the burst. The horizontal cursor sets the threshold value, and the time between the first
and the last edge of the burst is returned.
Result: BstW
Rise Time
Measures the rise and fall times of the left-most edge in the display between the upper
and lower reference levels. The reference levels are set in the Auto Measure menu:
MEAS > "Reference Level".
See also:
Reference Level: Upper, Middle, Lower Levels
.
Results: tr, tf
V-Marker
Two vertical markers are provided and the values of the waveform at the marker positions
are measured. Additionally, the differences of the two values in x- and y-direction are
displayed.
Results: V1, V2,
Δ
t,
Δ
V
Crest factor
The crest factor is also known as peak-to-average ratio. It is calculated from the maximum
value divided by the RMS value of the waveform. The measurement value is displayed
as "Crest" in the result table.
RMS
V
Crest
P
6.1.2 Performing Cursor Measurements
The cursors are activated according to the latest setting as soon as you press the
CURSOR key.
To configure cursor measurements
1. Press the CURSOR key.
The cursors are activated according to the latest setting.
2. Press "Meas. Type" to select the type of measurement to perform. The type deter-
mines which results are displayed in the result table.
See also:
Cursor Measurements