donw@zehntel (Don White) (09/24/88)
Thad Floryan wrote suggesting that Amiga/TV interference was caused
by lack of proper grounding for the amiga. My system had video noise due
to cheap video cables through my Amiga Live! My grounding was fine. You
might try a ferrite ring on your "shielded" video cables.
Don White
{ihnp4 | akgua | seismo}!zehntel!donw
Box 271177 COncord, CA. 94527-1177dillon@CORY.BERKELEY.EDU (Matt Dillon) (09/27/88)
>On the subject of RFI - what is the highest frequency present on the >86 pin edge connector of the A500? The technical reference manual >claims that the maximum is somewhere around 7Mhz although there is >suppoosed to be a 28 MHz clock as well. However the 28 MHz clock is >not supposed to be brought out for the A500. > > The reason I'm asking is that I'm getting television interference >all the way up to channel 11 (about 206 MHz) which is a pretty high >harmonic of 7 MHz. (The channels affected are 4, 5, 7, (barely >noticeable) 9, and 11). Sorry, RFI is caused mainly by digital switching speeds ... transitor state changes, which are independant of crystal/clock speed. The clock freq. *does* affect the amount of power emitted, however, so RFI is usually associated with faster machines. Also, nobody said RFI couldn't interfere with the TV signal after it has gone through the tuner. -Matt