On Wed, Jan 19, 2022 at 03:35 PM, <nicolas.mailloux@...> wrote:
Do you happen to know the value of said capacitor ? Just for checking it.
Also, do you find anything suspicious in the pictured I posted ?
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According to SM cap is 0.047uF/25V
Could be a late suggestion but did you try the attenuator on the bench? You can feed in a 1MHz signal (50-ohm output) and observe the attenuation at the other end ?(50-ohm terminated) without opening the box. You can activate relay contacts one by one on the bench with a power supply and check for steps. A bad relay driver can give similar symptoms.
When you observe your signal to be off, is it exactly off by an attenuator step? More than expected or less than expected?
Attenuator sections look like pi-attenuators. There are many online calculators that will tell you the expected resistances.?
Ozan
