MS20xxA VNA Master UG 10580-00166 Rev. C 8-1
Chapter 8 — Vector Voltmeter,
Option 15
8-1 Introduction
When equipped with option 15, the VNA Master 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.
8-2 Getting Started
As shown in the following block diagram (Figure 8-1), the VNA Master contains the Vector
Voltmeter receiver, signal source, and couplers for conducting both 1-port and 2-port
measurements at a selected CW frequency.
A setup comparison between a vector voltmeter and the VNA Master is shown for conducting
an S11 measurement.
Figure 8-1. Vector Voltmeter within VNA Master
10580-00166C.book Page 1 Thursday, February 21, 2008 12:52 PM
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