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<DIV>Time to step into this one. The discussion is correct by Don.
There are a number of differences that the processors can do. I am going
to go with the top sweep as the Ampex unit. </DIV>
<DIV> </DIV>
<DIV>The issue is that we do not know if the same signal is going into the TBC
portion of the machines. Assuming that the inputs were correct, then it
comes down to how each process works. The Nyquist principle will have to
be taken into account. So what is the sample frequency of the Merlin
TBC? Based upon that, then there can be some guesses as to the bandwidth
of the filter pre A-D. If it is 3 times sub carrier then the Nyquist will
tell us that the bandwidth has to be less than 6. The filter has to be a
sharp cut off so the gentle roll off is not possible. Also there is the
filter after the D-A. So tell us what is the sample frequency.</DIV>
<DIV> </DIV>
<DIV>Since the AMTEC and Colortec may have been designed with
bandwidths to meet PAL standards, there should be a great bandwidth in these
units. Does anyone know if there was a difference between these
units? Other than the 4.43 MHz color frequency?</DIV>
<DIV> </DIV>
<DIV>Chris Hill</DIV>
<DIV>WA8IGN</DIV></FONT></BODY></HTML>