The Admittance submenu contains the functions to calculate converted admittances from the measured S-parameters.
Converted
impedances and Z-parameters
Y <– S11, Y <– S12, Y <– S21, Y <– S22 select the converted admittances of a 2-port DUT.
More Admittances... opens a dialog to select converted admittances for more ports or mixed mode measurements.
Select the 2-port converted admittance parameters. The parameters describe the admittances of a 2-port DUT, obtained in forward and reverse transmission and reflection measurements:
Y11 is the input admittance at port 1 of a 2-port DUT that is terminated at port 2 with the reference impedance Z0 (matched -circuit admittance measured in a forward reflection measurement).
Y22 is the input admittance at port 2 of a 2-port DUT that is terminated at port 1 with the reference impedance Z0 (matched -circuit admittance measured in a reverse reflection measurement).
Y12 and Y21 denote the forward and reverse converted transfer admittances, respectively.
The analyzer also provides converted admittances for more drive ports or balanced port configurations; see More Admittances.
Use the More
Y-Parameters
dialog to measure Y-parameters including the transfer parameters. Use
the Inverted
Smith chart
to obtain an alternative, graphical representation of the converted admittances
in a reflection measurement.
|
Remote control: |
CALCulate<Ch>:PARameter:MEASure
"<Trace_Name>", "Y-S11" | "Y-S12"
| "Y-S21" | "Y-S22"
Create
new trace and select name and measurement parameter: |
Opens a dialog to select converted admittances for more ports or balanced port measurements.
The notation for admittance parameters and the functionality of the More Admittances dialog is analogous to the definition of S-parameters.
Y<— selects the type (left pull-down list) and the port number assignment (right pull-down list) of the admittance parameter. Mixed mode parameters are only available if a balanced port configuration is active. They are expressed as Y<mout><min>, where <mout> and <min> denote the output and input port modes. The port numbers are assigned in the order Y<out>< in>, where <out> and <in> denote the output (response) and input (stimulus) port numbers of the DUT.
Balanced and Measured Ports opens the Balanced Port and Port Groups dialog to define the properties of the test ports. Single-ended (unbalanced) admittance parameters are assigned to the physical test ports of the analyzer. Balanced admittance parameters are assigned to logical test ports. Selecting a balanced port configuration with logical test ports means that the unbalance-balance conversion is switched on and that the analyzer provides mixed mode parameters.
The graphics above the Balanced and Measured Ports button illustrates the current port configuration.
The port configuration
is valid for all traces in the channel
The settings made in the Balanced and Measured Ports dialog are channel settings and therefore apply to all traces assigned to the channel (Balanced and Measured Ports is also accessible through Channel –Mode–Port Config...). Within a channel the analyzer measures either single-ended or mixed mode parameters. If a balanced test port configuration is selected the single-ended parameters assigned to the channel are converted into mixed mode parameters.
Single-ended and mixed mode parameters
The relation between the generalized (multiport and mixed mode) admittance parameters and the S-parameters is analogous to the 2-port case and follows from the relations for impedance parameters.
|
Remote control: |
CALCulate<Ch>:PARameter:MEASure "<Trace_Name>", "Y-S11" | "Y-S12" ... Create
new trace and select name and measurement parameter: |
