[opendtv] Re: TV and Emergency Alerts question

Possible, but not normal practice.  Just look at the schematic of any 
television set.  The circuitry that receives the remote commands draws its 
power from the mains, not from some backup battery.  And the current draw is 
usually measured in hundreds of milliamps, not microamps.  I've seen sets 
that use a relay to power the remainder of the chassis, and I've seen sets 
that use a switching transistor for the same purpose, but in all cases the 
only way to isolate the television from the mains is to remove the plug from 
the wall socket.

John

----- Original Message ----- 
From: "Barry Wilkins" <barry.barrywilkins@xxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Wednesday, May 31, 2006 4:38 PM
Subject: [opendtv] Re: TV and Emergency Alerts question


>It is entirely possible to have remote command detection and
> mains (relay) switch-on using circuitry that draws sub uA currents from a
> back up cell. 


 
 
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