Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

Page: 328 / 813

Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.166 E-6
The measured ports are indicated in the first column of the Port Configuration table (Meas). The ports
can be either source ports or receive ports.
•
Port Configuration shows the current physical and balanced ports.
•
Range of Measured Ports shows the continuous range of ports measured. Selecting another
First Port or Last Port changes the range. To avoid ambiguities the selected ports are always
logical ports.
•
Define activates the current selection.
•
Simultaneous Measurement of Port Groups activates the definition of one or more groups of
ports that can be used for parallel measurements.
If a frequency-converting mode is active, port groups can not be measured in parallel.
Simultaneous Measurement of Port Groups
A port group is a continuous range of measured ports which is labeled with a capital letter. The analyzer
can measure several port groups in parallel. Port groups must not overlap and contain at least one
channel, so the maximum number of port groups is equal to the number of ports of the analyzer.
Example: Using port groups on a 4-port analyzer
A 4-port analyzer can be used for parallel measurements if only 1-port, 2-port or 3-port parameters are
needed:
•
Combining ports 1 and 2 to a first port group, ports 3 and 4 to a second port group leaves two
sets of 2-port parameters to be measured in parallel. The measurement provides 2 * 4 = 8 S-
parameters and is faster than a full 4-port measurement (16 parameters).
•
A reflection measurement involving four port groups, each with a single port, provides 4
parameters and is faster than the measurement with two groups of 2 ports.
The defined port groups are indicated in the first column of the Port Configuration table (Meas).
Selecting Simultaneous Measurement of Port Groups enables two additional buttons:
•
Add Group adds a new group (with default channels, depending on the existing port groups) to
the Port Groups table.
•
Delete Group deletes the selected group.