14 | Keysight | PXI Vector Network Analyzer - Configuration Guide
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I. Example Configurations
Please see the M937xA Startup Guide literature number
M9370-90001 for detailed cabling diagram and parts list.
Multiport Measurement Configurations
The Keysight PXI VNA is an ideal solution for multiport measure-
ments. The PXI VNA has a two-port (two reference receivers
and two test receivers) architecture in a one-slot module. It can
be easily configured as a true multiport VNA by using additional
modules installed in the same chassis. The true multiport VNA
has no degradation in performance (i.e. dynamic range, trace
noise, directivity.,,) due to external switches. The PXI VNA
supports full N-port correction capability when configured as a
multiport VNA.
Figure 1. The Keysight PXI VNA is an ideal solution for multiport measurements.
Easy to configure, better performance, and much faster speed!
When multiple M937xA modules are used in the following
configurations they are configured for multiport operation. The
modules may be installed in one chassis and identified by the
M937xA firmware as one VNA under a single PXI controller.
At least one VNA module in the chassis must have Option 551
(N-Port Calibrated Measurements) to maintain N-port capabil-
ities. The frequency of the multiport array is determined by the
lowest frequency module configured in the array. For example, a
4-port analyzer configuration using an M9370A (4 GHz) and an
M9375A (26.5 GHz) would have a maximum frequency of 4 GHz
when performing 4-port measurements.
This behavior extends to Option 010 and 009. In a multiport
configuration only one module must have a valid license for
these capabilities to function in multiport mode. However, in a
multi-site configuration a license must be purchased for each
independent VNA configuration.
Each module is connected into the array with Keysight cables. A
Y1242A multiport cable kit should be ordered for each additional
module and a single Y1281 accessory and tool kit should be
ordered for easier cable connections.
Additional cables and accessories for multiport connections:
Y1242A Multiport cable kit
Includes 2 SMB cables and 1 SMA cable for
connecting 2 modules together.
Add one multiport cable kit for each additional
2-port VNA
Y1281A Accessory and tool kit
Includes the following tools for SMA and SMB
connector removal:
5002-3361 Pull tool for SMB connectors
5023-1450 Custom long deep socket for
3.5/SMA connector nuts
Single 2-port M937xA PXIe VNA
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