Yeah, I posted about this a while ago, but just now discovered the
Raspberry Pi's DPI module. The timing chart [
http://jb-electronics.de/tmp/timing.jpg ] does not mention inverted
pulses, though. Do you have any intuition what could go wrong if you use
3.3V p-p signals instead? Could this explain the weird image?
Jens
On 2022-02-26 5:21 a.m., Alex wrote:
I get the feeling I have a very similar crt in my collection, but I
also think I mentioned this a while back on here, have you posted
already about this? I think mine is either Toshiba or Panasonic and
was a unit often used in T&M kit, Tektronix protocol analysers come to
mind? I had mine running from a pic and iirc it a) needed an inverted
sync pulse to convention and likely also needed 5v p-p signals?
Hope you get it working, it's a nice little CRT!
On Saturday, 26 February 2022 at 06:10:42 UTC nixiebunny wrote:
Jens,
The CRT monitor may not be adjusted properly. The horizontal
oscillator probably has a frequency control. This what we called
Horizontal Hold on TV sets.
Do you have any documentation such as a schematic, service manual
or similar for it?
On Fri, Feb 25, 2022, 9:34 PM jb-electronics
<[email protected]> wrote:
Hey David, I had a few minutes spare time tonight and I
verified that both the hsync and vsync signals appear at
exactly the right frequency (19.2kHz and 60Hz, respectively)
and have the correct duration. Yet, the image is still
garbage. How can that be, any ideas?
Jens
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