GUI Reference
R&S
®
ZNB/ZNBT
493User Manual 1173.9163.02 ─ 55
Test Setup
The button group on the right of the dialog allows you to select a test setup with an
additional two-port device. This device can be located in front of the DUT (during the
measurement) or in front of the power meter (during power calibration). "No Coeffi-
cients" disables the transmission coefficients but does not delete the entries in the Two
Port Configuration Dialog.
Remote command:
SOURce<Ch>:POWer<PhyPt>:CORRection:TCOefficient[:STATe]
SOURce<Ch>:POWer<PhyPt>:CORRection:TCOefficient:CALibration
Two Port Config...
Opens the "Two Port Configuration" dialog that allows you to define the transmission
coefficients of the additional two-port device. See "Two Port Configuration Dialog"
on page 493.
The button is disabled if "No Coefficients" is active. However, once you have config-
ured the two-port device, you can disable it without losing its configuration.
Two Port Configuration Dialog
The "Two Port Configuration" dialog defines the transmission characteristics of an
additional two-port in the calibrated frequency range.
Access: Power Meter Transmission Coefficients Dialog > "Two Port Config..."
Frequency / Transm. Coefficients: Insert, Delete, Delete All
The required two-port information is a list of transmission coefficients at different fre-
quency values (power loss list). The buttons in the dialog provide different ways of cre-
ating and modifying the list. Use "Insert", "Delete", "Delete All" to edit the list manually.
In a power, time or CW mode sweep, one point at the fixed CW frequency is sufficient.
In a frequency sweep, it is possible to enter several coefficients to account for a fre-
quency-dependent attenuation. Transmission coefficients are interpolated between the
frequency points and extrapolated, if necessary.
If no transmission coefficient is defined at all, the R&S ZNB/ZNBT assumes a 0 dB
attenuation across the entire frequency range. This assumption is equivalent to an
ideal through connection or selecting "No Coefficients" in the Power Meter Transmis-
sion Coefficients Dialog.
Remote command:
SOURce<Ch>:POWer<PhyPt>:CORRection:TCOefficient:INSert<ListNo>
SOURce<Ch>:POWer<PhyPt>:CORRection:TCOefficient:DEFine<ListNo>
Cal Softtool
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