// COMPLETE THREAD

Re: Beat Remote Monitor Snooping?

2 expanded posts · every known parent and child

NODE dc8e0140Re: Beat Remote Monitor Snooping? Gary Howland <gary@kampai.euronet.nl>Fri, 15 Mar 1996 14:01:28 +0800

At 10:46 PM 3/13/96 -0500, Alan Horowitz wrote:
>Visual contrast is not the same thing as frequency diffrence. It is quite
>easy to measure extremely small changes of phase.  As in, your
>plain-vanilla FM receiver.

However, that's not how SVGA CRT's do it.  NTSC (TV video) modulation is done by phase modulation of the 3.579545 MHz subcarrier.  SVGA has three different baseband analog signals feeding three electron beams.

Even so, they still should be able to pick up SVGA with a little tinkering.

kkkkk

NODE d52e3269Re: Beat Remote Monitor Snooping? lull@acm.org (John Lull)Sat, 16 Mar 1996 09:22:55 +0800

On Thu, 14 Mar 1996 21:54:10 +0100, Gary Howland wrote:

> NTSC (TV video) modulation is done by phase modulation of the 3.579545 MHz
> subcarrier.

This is not correct.  I'd suggest you go back and re-read your NTSC
references.