Okay one more question before I dig in. How is the trace A brightness intensified when you first pull the SEC/DIV knob? I assume somehow through U650. How does it know when to kick the trace brightness up a little over the region which will later be focused in on? I assume there's some comparators somewhere.
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On Thu, Mar 21, 2019 at 11:19 AM, Siggi wrote:
The 2465B has a separate CURSOR 0 line, but DLY REF 1 is shared. I think
this was done to allow cursors under delay sweeps. I'd guess DLY REF 0
controls the B-sweep timing, so I'd take a gander in your shoes.
On Thu, Mar 21, 2019 at 11:07 AM <thespin@...> wrote:
DLY REF 0/1 also control the position of the vertical cursors, right?
These function just fine, so I don't think it's these control lines.
On Thu, Mar 21, 2019 at 10:13 AM, Siggi wrote:
On Thu, Mar 21, 2019 at 9:48 AM Chuck Harris <cfharris@...> wrote:
4051 MUX's fail regularly, as do the opamps in the sample and hold
cells... and be suspicious of any CA3046's, or 3346's. on
occasion one of the sample and hold storage capacitors will get
leaky.
I also remember a case where a decoupling capacitor on the mainboard side
of one of the A5 control lines went leaky and pulled the control signal
down.
