WRT the horiz/vert signal pick-off for digitization, there is a nice clean
demarcation point on the 577 RHS of schematic 6, where the outputs from
U530 and U570 drive the output amplifiers.
At this point, it is 500mV/division, and appears to be inverted, I am
planning to buffer/invert these and convert to 100mV/div with an additional
pair of op-amps.
Looking at the 576, things are significantly more murky. Looking at the
display amplifier schematic (#9 on the bama manual copy), it looks like we
would need to pick off somewhere in that discrete signal chain.
I want to pick the signal off after all the applicable front panel controls
such as: magnification, inversion, positioning, etc
If there is interest in doing this, I think there is value standardizing on
pick off points for both the 576 and 577, preferably with maximum
compatibility.
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On Tue, Nov 2, 2021 at 11:33 AM Jeff Dutky <jeff.dutky@...> wrote:
apply the graticule pixels to the final frame buffer on the display
update, don't keep them in the "accumulating/integrating" buffer.
--
Andy