On Fri, Jan 31, 2025 at 8:04?PM NEIL YUENGER via groups.io <nyuenger=
[email protected]> wrote:
Just to confirm, on this image
/g/TekScopes/photo/300382/3881289?p=Created%2C%2C%2C20%2C2%2C0%2C0
,
is the 50 ohm resistor number 1? (top left) Do you know what the component
marked number 2 is?
No, I don?t believe so. I believe the 50Ohm resistor hugs the left-hand
side of that picture. You can see it's been laser trimmed.
Component marked 2 is the AC coupling capacitor.
Either way, I cannot measure 50 ohms on my BNC. So perhaps the resistor is
open, or perhaps the relay contact is not making connection.
But do you then measure 1MOhm? As many have pointed out, this should be the
default DC resistance of the attenuator, and by your description, for
reasons I mention in my earlier post, I believe your attenuator is stuck in
AC coupling.
