Rohde & Schwarz ZNB20, Руководство пользователя

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GUI Reference
R&S
®
ZNB/ZNBT
362 User Manual 1173.9163.02 ─ 38
Non-editable table cells
In addition to the test ports ("Port"), the source ports include all configured external
generators ("Gen"). The receive ports include all configured external power meters
("Pmtr" ...). Each port is displayed with its port number, device type ("Info"), and "Fre-
quency Result", according to the current channel base frequency and "Freq. Conver-
sion" settings.
Remote command:
n/a
RF Off
Turns the RF signal at a source port (analyzer test port or generator port) on or off.
The column is disabled (grayed) while the RF power is switched off globally for the
active channel. The settings are restored as soon as the RF power is switched on
again. While the RF power is switched off, the port can still be used as a receive port.
Remote command:
SOURce<Ch>:POWer<PhyPt>:STATe
SOURce<Ch>:POWer<PhyPt>:GENerator<Gen>:STATe
Gen
Qualifies whether the RF signal source at the port is switched on for all partial mea-
surements (box checked, permanent signal source) or only for the partial measure-
ments that require the port as a drive port. "Gen" has no effect unless the RF source at
the port is switched on (
RF Off is not checked).
Note: If External Switch Matrices are part of the RF connection configuration, opera-
tion with Internal Second Source is not supported. In this case the "Gen" flag is only
enabled for generator ports.
Switching on the signal source permanently eliminates the power settling times of the
DUT but may introduce measurement inaccuracies, e.g. due to crosstalk between two
ports. Therefore, "Gen" must be switched off to perform a system error correction.
An external generator always represents a permanent signal source that is switched
on for all partial measurements. "Gen" qualifies whether or not the generator is actually
available as a signal source in the test setup. The analyzer provides two alternative,
independent ways of selecting a generator as a signal source:
●
Check "Gen" in the "Port Settings" dialog, especially if the generator is not
assigned to a particular measurement result or drive port.
●
Select the generator as a source for a particular measurement result or for a power
calibration, see e.g.
Chapter 5.9.3.2, "More Wave Quantities Dialog" , on page 450.
Remote command:
SOURce<Ch>:POWer<PhyPt>:PERManent[:STATe]
SOURce<Ch>:POWer<PhyPt>:GENerator<Gen>:PERManent[:STATe]
Freq. Conversion
Opens an input box to define a port-specific stimulus frequency range (for frequency
sweeps) or CW frequency (for power, time and CW Mode sweeps); see
"Modify Fre-
quency Conversion Dialog" on page 363.
Channel Config Softtool