Many commands used on the HP8510 VNA are also supported on the MS464xB Series VNA. The supported commands are described in detail in the aforementioned Programming Manual Supplement – 10410-00323. See the sections below for definitions of parameters and other notations.

Note that the HP8510 instrument did not support the concept of per-trace reference plane extensions (only per-port). As a result, when entering this language mode, the reference plane controlling selection will automatically change to per-port and any per-trace entries will not be used (unless one manually intervenes on the UI).