8-4 PN: 10580-00343 Rev. H S820E UG
8-2 How the VVM Function Works Vector Voltmeter
Transmission measurement (2-port): This technique uses the VVM function
in a straightforward manner with its 2-port setup. The transmission response
of the DUT is measured from port 1 to port 2. The DUT amplitude and phase
shift are measured by the highly sensitive port 2 receiver. The high dynamic
range of this measurement is ideal when the DUT loss is high.
Figure 8-2 shows a block diagram comparison of the test configuration for the
Vector Voltmeter instrument method (left) and the equivalent measurement
capability integrated within the Site Master in VVM mode (right) when the
S820E is used for a transmission measurement.
(Left) Vector Voltmeter and (Right) S820E Site Master Equivalent Measurement
1 S820E Site Master
2 Coupler or Splitter
3Signal Generator
4 Vector Voltmeter
5 Transmission Measurement
6 DUT (Device Under Test)
Figure 8-2. Vector Voltmeter Transmission Measurement
1
4
5
2
3
5
6
6
DUT DUT
Site Master
Vector
Voltmeter
Signal
Generator
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