Our lab has two sliding loads 00915-60003 (male) and 00915-60004 (female), but their are slightly out of spesification between 36-40GHz range. Does Keysight do calibration and adjustment for those components?
How do you know they are out of specification? There is very little to go wrong in them, and it is very difficult to verify the performance outside a high-quality cal lab.
I used data base 2.4mm calibration standards (Open, Short and fixed load), which are calibrated in METAS. VNA-Tools II program give me posibility to calculate circe fitting value from all six sliding positions. This measurement method has worked perfectly with Type-N and 3.5mm sliding loads charaterization. On my case, I noticed that each slide positions S11 mag value fluctuating and that's wondering me. Phase change is totally fine. It feels, that some strange reason load element behaving strangely. Those 2.4mm sliding loads I have not used for many years, so maybe load material or graphite has aged someway on them. Pin depths on them are well inside specs
Makes sense. It might be an issue where the center conductor or the load element has some aging (corrosion or the like) and that might cause it to have amplitude error, due to varying contact resistance. I don't know if there is any way to repair them, or if the repair cost is substantially the same as a new unit cost.
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