The three main verification kits for the MS4640A Series VNAs are those corresponding to 3.5 mm, K, and V connectors:

The verification kits and their use are described in the following documents:

The devices in these kits are selected based on their ability to stress the envelope of possible measurement parameters while still providing a very stable and repeatable behavior. The key attribute of the devices is that of long term stability. These kits contain the following devices:

Calibration kit components cannot be used for verification since the result would be biased (some calibrations force the result to match expectations for the components used during calibration). Higher loss devices could have been used but they become more difficult to characterize accurately and the value of the verification would be reduced. Active devices with gain have not been used due to concerns about stability of the response over time. The envelope of coverage of the existing standards is illustrated in Figure: Regions of Parameter Coverage of Verification Kit Component. Each standard has a regime of coverage in terms of insertion loss and return loss; when combined, the entire kit reasonably exercises a wide variety of parameter values.

 

 

The diagram in Figure: Regions of Parameter Coverage of Verification Kit Component illustrates the regions of parameter coverage of the various verification kit components. The regions are not drawn to scale.

 

For the MS4640A Series VNAs, the verification comparison is valid for calibrations performed with the calibration kits listed under each verification kit:

Other combinations of calibration kits with verification kits are not supported. Verification kits based on other connector types such as GPC-7 or N exist for other Anritsu VNAs but the MS4640A Series VNA verification software does not support all of these.