R&S ZVB - Page 127

R&S
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ZVA / R&S
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ZVB / R&S
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ZVT GUI Reference
Trace Menu
Operating Manual 1145.1084.12 – 30 112
 Ratio indicates the selected ratio.
 Source Port contains all analyzer ports or external generators which can be used as a source for
the stimulus signal. The list contains all analyzer ports Port 1 to Port n. Generators (Gen 1, Gen 2,
...) must be configured explicitly in the System Configuration – External Generators dialog before
they appear in the list.
In the trace line and in the status bar, the source port is indicated in brackets, e.g. b2/a1(P1) for
the ratio b
2
/a
1
with source port no. 1.
 Detector selects the algorithm that is used to calculate the displayed trace from the individual
measurement points. In the Max. and RMS detector modes, it is possible to define the detector
observation time (Meas. Time) for a single measurement point. The Detector and Meas. Time
controls are both unavailable in true differential mode, because only the Normal detector provides
consistent phase information. The detector settings are available for ZVA and ZVT network
analyzers only.
External generators
The measurement process for external generators Gen 1, Gen2... in the Source Port list differs from the
measurement process for internal source ports:
 An external generator always represents a permanent signal source that is switched on for all
partial measurements. In contrast, an analyzer port is switched off for partial measurements that
do not require a source signal. Exception: Internal ports can be configured as permanent sources
(see Gen setting in the Source section of the Port Configuration dialog).
 The external source is measured in the first partial measurement where an internal source is
active. This means that no separate partial measurement for the external generator signal is
needed. If no internal source is needed at all, the external source is measured in the first partial
measurement.
Ratios of single-ended and balanced wave quantities
If a balanced port configuration is selected and the True Differential Mode is active, the left Numerator and
Denominator pull-down lists contain the following wave types:
 as, bs: Single-ended incident (a) or outgoing (b) wave. To select this wave type, the selected port
must be unbalanced. If the port configuration contains no unbalanced ports, the single-ended
wave quantities are hidden.
 ad, ac, bd, bc: Balanced incident (a) or outgoing (b) waves. d and c distinguish between the
differential and common mode; see Wave Quantities and Ratios.
In remote control, different drive ports for numerator and denominator waves are allowed.
Remote control:
CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "B2/A1" ...
Create new trace and select name and measurement parameter:
CALCulate<Ch>:PARameter:SDEFine "<Trace_Name>", "B2/A1" | ...
Detector
Selects the algorithm that is used to calculate the displayed measurement points from the raw data. The
Detector can be selected in the More S-Parameters, More Ratios and More Wave Quantities dialogs.