17 Jun
2002
17 Jun
'02
11:24 a.m.
The mechanism that was used in early TV sets to
achieve the
correction was rather interesting:- the set contained a glass block,
with an ultrasonic transducer at each end (one sending, the other?
well, no prizes for guessing!). The delay in the block was one
transmitted line so the output could be directly compared with the
following line. Ah, the wonders of old technology...
I still see these in 10yo+/- VCR's. I speak of a silicon? slab about
a square inch, rectangular, not square, with two two-wire electrical
connections (sender and receiver?) on corners cut at 45-deg angles.
There are sort of harmonic dampening node points glued or whatever
to regular places along the block. All this inside a small plastic block.
Sounds like the same thing as what you're saying.
What might be the signal types and the delay time for these?
John A.