Mixed-mode, imbalance, and common mode rejection ratio (CMRR) parameters
Unratioed receiver measurements
The S93551A adds a multiport analyzer mode that enables full N-port error correction and measurement capabilities using an external test set. Only standard measurement class is available in the multi-port analyzer mode. For multiport analysis greater than 8 ports, it is highly recommended to use PLTS software N1930B to manage the large data format files that easily grow exponentially (12-port S-parameter files have 144 S-parameter elements). This capability is not available with PNA Option 200, 210, 400, and 410. S93551A is equivalent to Option 551 on PNA/PNA-L/PNA-X Series A model network analyzers.
You can find more info about multiport test sets under the Options & Accessories/Related Products tab.