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Old 04-06-2026, 01:33 PM
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Join Date: Jul 2004
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Quote:
Originally Posted by dtvmcdonald View Post
One astounding tidbit. Looking at the severe noise (the S/N of a sunlit scene
is like 2:1) I noticed something and measured the frequency response. That's the frequency response looking at the width and shape of a full dark-to-light sharp edge or light-to-dark or stripe test patterns. The 3dB down point.

Its 8 MHz. That's eight megahertz. Eight, 8, e i g h t. And it shows on the high end
Ikegami monitor I'm using. Why would they make such a thing when it was supposed
to feed a transmitter that surely not that wide, nor displays that wide either.

It does demonstrate how sharp iconoscopes can be, such as the talking one in Japan :-)
Is the horizontal scan rate 15750? If it's slower, the bandwidth will be less by the same ratio even though the horizontal resolution is high.
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