PicoVNA® 100 Series vector network analyzers

Check standard comparison utility

The supplied Touchstone measurement data for a serial-numbered check standard is loaded into the PicoVNA memory trace as a ‘Reference’ measurement.

With a valid, full S-parameter, full-span calibration established and the check standard connected between the test ports, the comparison utility performs a measurement. It then

compares and tabulates, on each frequency point basis, the measurement with the stored ‘Reference’ data. Magnitude and phase difference are tabulated.

The utility combines uncertainties for the instrument and test leads (respective specifications) with measurement uncertainty and stability of the check standard (also supplied).

The difference between reference and measurement is then compared with total uncertainty, giving a result of ‘pass’ (within uncertainty) or ‘fail’ (outside uncertainty).

You can save the comparison dataset for archive or analysis.

This is a very demanding evaluation of an instrument, test leads and the calibration performed, very nearly, to the full specification of the instrument and leads. The test is designed

to identify a weak process, or worn, contaminated or damaged system components that might lead to a compromised measurement. To gain a pass, correct calibration procedure

must be followed including the use of torque wrenches to make the connections at calibration and comparison measurements. The uncertainty data provided attempts to take into

account the expected variability of your measurement setups when mating the check standard with Pico-supplied PC3.5 or SMA port connectors. There is a wide variation in the

quality of commercially available test cables and SMA connectors, and contamination, damage or wear can easily occur. We guarantee that the uncertainty data provided will cover

your test setups only when you use Pico-supplied calibration standards, port adaptors and test leads in new condition.