David,
The stored signal is switched in fairly late in the horizontal circuit. Take a look at the schematic (ko4bb.com if you don't have a better copy). The digital signal is switched in at the "Horizontal Mux", but the analog horizontal comes in through the "Horizontal Preamp" section. Check voltages and waveforms in that section. Note that the A and B sweeps come in through almost the same path. Does the B sweep also have the compression on the left side?
--John Gord
toggle quoted message
Show quoted text
--- In TekScopes@..., "david_s5y" <david_s5@...> wrote:
I have repaired the storage functions and am now trying to resolve this display issue.
Here is a video
That shows the issue. It only appear in NON-Store mode.
I start in Store mode and show it works, then switch to NON store show the issue and then change the time base and then return to store.
Since it works in Store mode am I correct to think that rules out the physical connections at the CRT?
But can the CRT output amplifier be going into limiting for only the non store?
How is the horizontal timing generated?
I am lost, please fire some suggestions my way.
David
