On Sun, Jan 31, 2021 at 10:22 PM, Jean-Paul wrote:
Notice that a "short legnth of RG/58" is unsuitable for accurate calibration.
A precision 50 cm 50 Ohm like Tektronix 012-0482-00 is preferred.
finally a wideband 10-20 db in-line 50 ohm attenuator like Mini-Circuits
HAT-20 can reduce VSWR reflections that affect the measurements.
A Tek SG504 does a pretty good job as well.
Raymond
Raymond Domp Frank