Some Cable boxes use a RF remote, but most use an IR remote. IR remotes are
often powerful enough to bounce a signal off a wall or glass and operate the
equipment. One test of the IR power is to see how many layers of thick cloth
that the remote will still function through, so many IR remotes will work
through your pocket.
On 12/7/2004 9:44 AM US(ET), Tony Miklos took fingers to keys, and typed
My ex in-laws bought a new Zenith TV with a remote. One of the first
offered back in the early 60s. Only 2 functions, one to raise-lower the
volumn and the other to mechanically turn the channel dial. It used a
light beam that had to be aimed directly at the TV's light receptor. It
worked pretty good, unless the sun was shining on the set, then it would
operate the controls by itself.
I thought the first Zenith remotes used high frequency tuning forks that
were hit by a hammer mechanism (like in a gun) when the button was
pushed. I've heard of a jingling dog collar causing the channel to
This is exactly the sort of problem the FCC is supposed to prevent, not
chasing Howard Stern off the air for using the same language that Oprah
gets away with (admittedly the context is a little different)
Bob <-- doesn't like Howard Stern or Oprah, but that's not the point
No fault of the FCC. It is the direct result of the manufacturers chosing to
supply devices in a frequency band that was already owned by someone. All
such use comes under an agreement that any devices must not interfere with
communications and must tolerate any interference.
Whether it is a TV remote, garage door remote, baby monitor or other RF
devices, the frequency they are allowed to operate is dictated by the
authorities, they don't get to pick any one they want to use.
On Tue, 07 Dec 2004 02:12:17 GMT "Ish"
used 24 lines of text to write in newsgroup: alt.home.repair
I didn't know that. So reading both websites I gather that the FCC handles
regulation of certain parts of the spectrum:
and the NTIA allocates spectrum use, no?
I am sure that it was the FCC that allowed manufacturers to use for
garage openers a frequency that "belonged to" the military -- on
condition that the garage door openers do not interfere with military
communications. And if the interference now goes the other way, it's the
responsibility of the manufacturers of the door openers to take care of it.
Similarly, all these other UNlicensed "Part 15" devices (cordless
phones, wireless networking products, etc., etc.) are not allowed to
interfere with licensed services, and the users must put up with any
interference that they experience. (Read the labels on these things.)
But when a CB or ham radio transmission interferes with somebody's
cordless phone, guess who is seen as the "bad guy."
BTW, many of the large-screen TVs on the market are not certified for
use in residential environments because they generate too much
interference: they are "Class A" devices, not "Class B." Bet the sales
people at Best Buy won't warn you about that.
On 12/06/04 09:10 pm Ish tossed the following ingredients into the
ever-growing pot of cybersoup:
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