Re: Fried Ch0 S11 port #hardware
There is a 10 uF series capacitor at both inputs, so DC is blocked. But when connecting your device under test, the DC transient may still kill your analyzer. The capacitor charge current path is through the internal protection diodes in the input switch (port 1). Port 2 is much better protected for DC transients since it has 14 dB of resistive attenuation.toggle quoted messageShow quoted text
I had a bunch of broken units, they came back to life when I replaced the input switch U551. It is a MXD8641 which is sold on Aliexpress, 50 pcs for a few dollar.
How much DC did you apply?
Op 29-11-2020 om 23:54 schreef GM7TFP: