R&S ZNB Series User Manual page 96

®
R&S ZNB/ZNBT
Parallel measurement with frequency offset is transparent to the user: All port groups
will be measured in the requested frequency range. The results are available in the
same form as if they were obtained in separate measurements without frequency off-
set.
Please note that in parallel measurement with frequency offset the firmware uses a
modified IF as compared to measurements not using this mode. Because this modified
IF requires a special calibration, it is essential to perform the
Frequency Offset settings as for the actual measurement; otherwise the calibration is
turned off (see
For a R&S ZNBT, parallel measurement with frequency offset is only possible if the
configured DUTs use different sources. Hence the R&S ZNBT must be equipped with
more than 8 ports and one DUT must be a subset of ports 1-8, the other a subset of
ports 9-24.
4.1.4.4 Stimulus and sweep types
The function of the Stimulus hardkeys [Start], [Stop], [Center] and [Span] depends on
the sweep type.
Table 4-1: Function of Stimulus keys
Sweep type [Start](unit)
"Lin Freq" "Start Frequency" (Hz)
"Log Freq" "Start Frequency" (Hz)
"Segmented" –
"Power" "Start Power" (dBm)
"CW Mode" "CW Frequency" (Hz)
"Time" "CW Frequency" (Hz)
The ranges of numerical values must be compatible with the instrument model. The
conditions for the stimulus range depend on the sweep type:
●
●
User Manual 1173.9163.02 ─ 62
"Cal Off label"
[Stop] (unit)
"Stop Frequency" (Hz)
"Stop Frequency" (Hz)
–
"Stop Power" (dBm)
"Number of Points" (-)
"Stop Time" (s)
"Lin Freq" / "Log Freq" / "Segmented"
The supported frequency range depends on the instrument type; for an overview
refer to Table 7-17.
– For "Lin Freq" and "Log Freq" sweeps, if the number of sweep points is greater
than 1, the stop frequency must be greater than the start frequency and the
span must be ≥ 1 Hz. If a stop frequency smaller or equal than the current start
frequency is set, then the start frequency is adjusted and vice versa.
– For "Segmented" sweeps, the start and stop frequency in a sweep segment
must not be different. So with a segmented sweep you can measure n
at frequency f (in segment 1), n
1
"Power"
Start and stop power are both entered in absolute units (dBm). Start and stop
power must be different; the stop power must be larger than the start power. If a
on page 163).
[Center] (unit)
"Center Frequency"
(Hz)
–
–
"CW Frequency" (Hz)
"CW Frequency" (Hz)
"CW Frequency" (Hz)
points at frequency f
2
Concepts and features
Basic concepts
Calibration with the same
[Span] (unit)
"Span Frequency" (Hz)
–
–
"CW Frequency" (Hz)
"CW Frequency" (Hz)
"CW Frequency" (Hz)
points
1
(in segment 2) etc.
2
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