R&S ZNB Series User Manual page 589

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R&S ZNB/ZNBT
Lower Tone
Selects an analyzer port as a source of the lower tone signal.
Remote command:
[SENSe<Ch>:]FREQuency:IMODulation:LTONe
Upper Tone
Selects an analyzer port or external generator as a source of the upper tone signal.
The source must be different from the lower tone source, i.e. you cannot combine cou-
pled generator ports for the lower and upper tones. On a four-port R&S ZNB with
nal second
If no internal second source is available, the upper tone must be provided by an
nal generator.
Remote command:
[SENSe<Ch>:]FREQuency:IMODulation:UTONe
Receiving Port
Selects the receiving port for the signal from the output of the DUT.
Remote command:
[SENSe<Ch>:]FREQuency:IMODulation:RECeiver
Src. for Rcvr. Cal
Selects the signal source for the power calibration of the receiving port.
In general, the combiner output signal is most convenient and provides the simplest
calibration procedure. However, it is also possible to select a free analyzer or generator
port, with the downside of an additional source power calibration step.
Selecting a different source is necessary, if the bandwidth of the "Combiner Out" signal
does not fully cover the required receiver frequency range. For example, if a filter is
used at the combiner output to cut off the intermodulation products originating from the
combiner.
User Manual 1173.9163.02 ─ 62
source, for example, you cannot combine ports 1 and 2 or ports 3 and 4.
GUI reference
Channel Config softtool
Inter-
exter-
589