Quote:
Originally Posted by old_tv_nut
Poor interlace results when horizontal sweep waveforms bleed into the vertical sync section. Because of the high currents and voltages in the H sweep, this means that grounds are critical. Many sets have questionable interlace under normal use without added circuits, but adding a baseband video input may have created a ground loop for horizontal sweep currents/voltages.
It may help to do some trial-and-error experimentation of where the added video input circuit is grounded, but there is no guarantee.
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Thanks! This makes sense, considering that some of these things have very simple and critical circuits (to reduce costs etc), not always optimized or routed.
I will play with grounding, routing and with sync separator too, in one particular 10" portable I'm restoring/modding that have horrific vertical interlace. Perhaps it will behaves a little better.
And perhaps will better for me to having only moderate expectations when injecting direct video of course.... hehe
