User manual

Measurements
R&S
®
RTO
144User Manual 1316.0827.02 ─ 06
2. Select the vertical tab for the measurement you want to configure.
3. Tap "Source" and select the waveform to be used as the measurement source. For
histogram measurements, select the histogram.
If you enabled the measurement with the toolbar icon or MEAS key, the source is
already defined. However, you can select any other input channel, math or reference
waveform.
4. On the "Setup" tab, select the measurement category tab: "Amp/Time", "Eye/Jitter",
"Spectrum", or "Hist".
5. Under "Main measurement", select the main measurement type. This measurement
is the one referred to if the measurement result is used as a source for math calcu-
lations.
For details on the available measurement types, see .
6. Optionally, tap "Activate" to select further measurement types.
All active measurement types are displayed in the measurement overview. Here you
can enable or disable the measurement types individually or all at once, except for
the main measurement type.
7. Depending on the selected measurement type, further settings may be required:
● For phase and delay measurements, tap "2nd Source" and select a second
waveform.
● For area measurements, set the "Area level". By default, the time axis is used.
● For eye measurements, tap "Autoset" to define optimized settings for the eye
measurement.
● For "Bandwidth" measurements, enter the "N db down" value, i.e. the threshold
until which the samples to the left and right of the peak value are analyzed.
● For "Channel Power" measurements, enter the "Channel BW" over which the
channel power is calculated, and the "Channel CF", the center frequency from
which the channel power is calculated.
● For "Occupied Bandwidth" measurements, enter the percentage of the total
power used to determine the occupied bandwidth in the "Occup. BW" field.
● For histogram measurement types "Marker + Probability %" or "Marker - Proba-
bility %", define the marker "Reference" for the probability domain. Then define
the "Delta" in percent which is to be added or subtracted from the marker value.
8. Depending on the selected measurement type, further optional settings may be avail-
able:
● For all Amp/Time measuments, you can optionally define a "Signal threshold" to
exclude signal values from the measurement if they do not exceed this threshold .
● For all Amp/Time measuments performed on waveforms with waveform arith-
metic mode "Envelope" or with "Peak detect" decimation, you can select the
upper or lower part of the waveform for measurement, or a combination of both
with "Envelope selection".
● For all spectrum measurements, you can optionally define a "Noise reject" thresh-
old.
Automatic Measurements