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From: | David P. Reed |
Subject: | [Discuss-gnuradio] "Tempest" for LCD displays? |
Date: | Mon, 20 Jun 2005 00:06:41 -0400 |
User-agent: | Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050317 Thunderbird/1.0.2 Mnenhy/0.6.0.104 |
Anyway, now that we have LCD displays growing in popularity, anyone know offhand if they radiate as well as CRTs do, and what the relation between their inputs and the waveforms put out would be?
I'm actually interested in detecting LCD and CRT leakage, and decoding the picture display from both LCDs and CRTs with a remote USRP, as a useful hack for determining what TV channels people are watching nearby (I know you can also listen for the local oscillator in the tuner, but the tube probably leaks more energy, and gives you more information.
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