When equipped with Option 15, the Vector Network Analyzer is a convenient tool for ensuring phase match between RF cables, especially in the field where access to AC power is typically limited. This mode is called Vector Voltmeter mode (VVM) because it can replace a vector voltmeter, which is becoming obsolete. With the convenience of a user interface that is similar to a vector voltmeter, an engineer or technician can use a familiar display and highly integrated solution for phase matching cables.

The function hard keys in Vector Voltmeter mode are:

The fifth key is not used in Vector Voltmeter mode.