GUI reference
R&S
®
ZNA
671User Manual 1178.6462.02 ─ 29
Source Gen
Defines the behavior of the RF signal source at the related port.
●
If unchecked (default), it is only switched on for the partial measurements that
require the port as a drive port.
●
If checked, it is switched on for all partial measurements (permanent signal
source).
"Source Gen" has no effect, if Source RF Off is checked.
Permanent signal sources can eliminate the power settling times of the DUT but can
introduce measurement inaccuracies, e.g. due to crosstalk between ports. Therefore,
during system error corrections permanent signal sources must be deactivated.
Note:
●
Permanent sources can provide the required power, frequency and phase at every
point. However, channel- and sweep-related changes can cause disturbances on
the generated signal. The independent generator mode introduced with FW
V2.60 lets you configure internal sources as permanent CW signals that are inde-
pendent of all channels. See Chapter 5.19.8.3, "Independent Generator Settings
dialog", on page 920.
●
Among the analyzer ports driven by the same internal source, only one can oper-
ate as generator port.
(See the explanations in Chapter 4.7.23, "Internal 2nd source and 2nd LO genera-
tor for 2-port R&S ZNA", on page 303, and Chapter 4.7.20, "Internal 3rd and 4th
source for 4-port R&S ZNA", on page 302.)
An external generator always represents a permanent signal source that is switched
on for all partial measurements. "Source Gen" determines whether the generator is
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 "Source 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 5.2.3.2, "More Wave Quantities dialog", on page 359.
Note: If external switch matrices are used, then, depending on the matrix RF connec-
tions, the available matrix paths, and the configured measurements, some test ports
cannot be used as permanent ports. The firmware displays an error message if it
detects a configuration problem.
Remote command:
SOURce<Ch>:POWer<PhyPt>:PERManent[:STATe]
SOURce<Ch>:RLO:PERMenable
SOURce<Ch>:POWer<PhyPt>:GENerator<Gen>:PERManent[:STATe]
Channel Config softtool
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