28

Table 33. Measurement capabilities

Multiport / Multisite operation

Please refer to the relevant literature for more information on Multiport/Multisite operation. The

installation guide and help file are on the CD that was shipped with the PXI module and at:

http://na.support.keysight.com/pxi/help



Ordering information:

http://literature.cdn.keysight.com/litweb/pdf/5991-4885EN.pdf



Hardware configuration: Installation Guide



Software configuration: M937xA Help file.

Multiport (Option 551)

The PXI VNA modules have the ability to be configured into a multiport network analyzer. Adding a

second module to the PXI chassis would enable a four port vector network analyzer, and for each

subsequent PXI VNA module which is added, it provides two additional test ports to the VNA. This

configuration provides a full featured multiport vector network analyzer capability with full crossbar S-

parameter measurement capability.

Configurations of up to 16 modules with 32 test ports have been demonstrated.

For four-port operation, all specifications apply except cross-module trace noise. Cross-module trace

noise cannot be tested on individual modules. However, four-port trace noise performance will typically

meet the two-port specifications.

Modules are designed and characterized to allow multiport operation beyond four ports, but

performance is not warranted.

Anticipated Nominal Multiport Performance

The guidance provided here is given as general reference based on Keysight’s internal evaluation of

multiport PXIe VNA configurations. Every PXIe VNA card is tested as an individual 2-port VNA to meet

or exceed the performance parameters defined within the data sheet. Multiport setups using multiple

PXIe VNAs are not tested as a multi-port instrument in the factory.

In the table below:



A check mark, , indicates the performance parameter is the same as the corresponding 2-port

performance.



A filled in square,

port performance.



An empty diamond,

number of ports increases.