An automatic vector voltmeter may be built using a six-port junction on the principle that a reference signal ([a.
Three steps required for the use of the vector voltmeter are the six-port junction calibration, the insertion device calibration and the measurement, based on the superposition principle.
A schematic diagram of the vector voltmeter is shown in Figure 4.
The use of the vector voltmeter as an automatic network analyzer for a given frequency involves performing the system calibration without the component under test, the direct link between the two insertion points A and B, as shown in Figure 8; computing the calibration coefficients [C.
The cost of the analyzer system is less than that of systems that employ vector voltmeters
and frequency downconverters.
Versatile, the VNA Master is also an all-in-one tool that can replace laboratory grade instruments, such as scalar analyzers, vector voltmeters
, power meters and spectrum analyzers, in the field.
Features include cable and antenna test (distance to fault, return loss, and VSWR); a vector voltmeter
(one-and two-channel); power meter measurements up to 24 GHz with a USB power sensor; USB, LAN, and micro SD connectivity; and a wide-angle and bright display for use in direct sunlight.
Its key measurements include cable and antenna test from 2 MHz to 4/6 GHz, spectrum analysis from 100 kHz to 4/6 GHz, vector network analysis, vector voltmeter
and true average power measurements.