[opendtv] Re: TV and Emergency Alerts question
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 31 May 2006 17:02:45 -0400
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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