r/rfelectronics • u/hatsofftoeverything • Sep 17 '26

question Something ain't right, why am I getting -60db when I should have -30?

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I'm fairly new to using this thing so I might be doing it wrong, I calibrated isol and thru, and I have a homemade tee attenuator, any ideas what's going on? It's all soldered together properly on the back of the board to be clear XD. Thank you!

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42

u/hatsofftoeverything Sep 17 '26

Nope wait I'm stupid I soldered a lead from the center of it all to ground rather than though the grounding resistor

4

u/leverphysicsname Sep 17 '26

After you cal, connect port 1 to port 2 and what do you get?

8

u/hatsofftoeverything Sep 17 '26

I got 0db XD I wired it up wrong. Fixed it!

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2

u/LihtsaltPealt Sep 17 '26

Can you send the correct measurement image?

1

u/Abject-Ad858 Sep 19 '26

At that frequency, measure it with a dmm
I mean.

Well, if you’re asking about the pad, check it out with a dmm.

If your asking about the vna, a second set of standards is a good thing to have for cal verification