HDTV Audio and Anti-Glare

Wes Newell wrote:

Channels can be ntsc, 8vsb, qam, or any other modulation form. The
channel number is locked to the frequency. So on channel 49 you can have
anything. It's not locked to ntsc. It most certainly can be clear qam. Or
it could be 8vsb, or any one of umpteen other modulations.

Hogwash. Any TV with a "cable ready" tuner will tune channel 49 one way:
with an AM audio carrier at 373.25MHz and an FM audio carrier at 377.75MHz.
Please name one that doesn't.

And please, no more yarns about how you have your OTA channels set up.
It's quite irrelevant.

Wes Newell wrote:

75.9 and 75.10 are numbers assigned to those channels *BY COMCAST* That
doesn't qualify them as "Comcast channels" ?? They are more "Comcast
channels than are 49 and 50, which are industry standard channels.

No, it doesn't. They would be virtual channel numbers assigned to a real
channel number. And they can also be used by anyone else.

So can channel 49 and 50. So can *any* channel number. But 75.9 and 75.10
are the channel numbers assigned by Comcast to ESPN and ESPN2. That makes
them as much "Comcast channels" as are 49 and 50 (which Rick termed "Comcast
channels.")

On Wed, 28 Oct 2009 21:59:23 -0700, UCLAN wrote:

Wes Newell wrote:

Channels can be ntsc, 8vsb, qam, or any other modulation form. The
channel number is locked to the frequency. So on channel 49 you can
have anything. It's not locked to ntsc. It most certainly can be clear
qam. Or it could be 8vsb, or any one of umpteen other modulations.

Hogwash. Any TV with a "cable ready" tuner will tune channel 49 one way:
with an AM audio carrier at 373.25MHz and an FM audio carrier at
377.75MHz. Please name one that doesn't.

Did you see TV anywhere in my statement? And fwiw, the TV I'm watching
doesn't have a valid channel 49, but it does have a 41, and when I enter
41, it actually tunes to real channel 35, and it's not NTSC. It's ATSC
8VSB. So this must have been one of the thousands of different TV's out
there that you missed testing.:-)

And please, no more yarns about how you have your OTA channels set up.
It's quite irrelevant.

And why is that? If my TV system will do it, so can any other one if
implimented. I've already explained how the TV scans the channels when
you set it up and stores virtual channel information from the scan in
translation tables. It appears to me that you don't have the first clue
how it works with new digital TV's. Tuning 49 on an old TV will get you
only NTSC channel 49. This is not the case with newer TV's with digital
channels. Converter boxes are one good example. Putting 49 into the
remote will go to virtual channel 49.1. And that broadcast can be on ANY
real channel number from 2 - 82.

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UCLAN wrote:
RickMerrill wrote:

You sure type a lot about something you totally don't want to understand.
Yes, we could have made things clear to you by stating "virtual
channel 49
a la Comcast listings for my area code" but you may not know French
either.

Channel 49 is *NOT* a virtual channel, no matter what language you
mention. Channel 49 is a 6MHz wide channel with an AM video carrier
at 373.25MHz and an FM audio carrier at 377.75MHz.

Repetition does not make you right. Your concept of "channel" is
understandable, but it is not what I was trying to talk about.

An STB has NUMBERS that resemble freq based "channels" and the Comcast
marketing people call those numbers channels.

UCLAN wrote:
Wes Newell wrote:

Channels can be ntsc, 8vsb, qam, or any other modulation form. The
channel number is locked to the frequency. So on channel 49 you can
have anything. It's not locked to ntsc. It most certainly can be clear
qam. Or it could be 8vsb, or any one of umpteen other modulations.

Hogwash. Any TV with a "cable ready" tuner will tune channel 49 one way:
with an AM audio carrier at 373.25MHz and an FM audio carrier at 377.75MHz.
Please name one that doesn't.

And please, no more yarns about how you have your OTA channels set up.
It's quite irrelevant.

UCLAN, how old ARE you anyway?

You're ripe!

RickMerrill wrote:
UCLAN wrote:
Wes Newell wrote:

Channels can be ntsc, 8vsb, qam, or any other modulation form. The
channel number is locked to the frequency. So on channel 49 you can
have anything. It's not locked to ntsc. It most certainly can be
clear qam. Or it could be 8vsb, or any one of umpteen other modulations.

Hogwash. Any TV with a "cable ready" tuner will tune channel 49 one way:
with an AM audio carrier at 373.25MHz and an FM audio carrier at
377.75MHz.

Many cable system today have dropped analog altogether so those
cable-ready sets now must have a STB.


I'm 68 myself.

And ripe too!

RickMerrill wrote:

Repetition does not make you right. Your concept of "channel" is
understandable, but it is not what I was trying to talk about.

An STB has NUMBERS that resemble freq based "channels" and the Comcast
marketing people call those numbers channels.

Apparently I need software that lets me post in bold print. I couldn't care
less about your Comcast box. When I refer to a 6MHz wide channel that can't
be a QAM channel, I am referring, of course, to a TV tuned channel (as I
have detailed many times.) But you knew that.

Wes Newell wrote:

Channels can be ntsc, 8vsb, qam, or any other modulation form. The
channel number is locked to the frequency. So on channel 49 you can
have anything. It's not locked to ntsc. It most certainly can be clear
qam. Or it could be 8vsb, or any one of umpteen other modulations.

Hogwash. Any TV with a "cable ready" tuner will tune channel 49 one way:
with an AM audio carrier at 373.25MHz and an FM audio carrier at
377.75MHz. Please name one that doesn't.

Did you see TV anywhere in my statement?

You were replying to my post which *was* clearly about TV tuned channels:

UCLAN, Oct 28:

"LOL! Wrong about what? I have maintained all along that whole numbers
tuned by a TV like (49 and 50) *cannot* be QAM digital channels since
they are NTSC analog channels. As it turns out, I was right. Or do you
still maintain that his TV was tuning Clear QAM on channels 49 & 50?"

Nice try, though.

And fwiw, the TV I'm watching
doesn't have a valid channel 49, but it does have a 41, and when I enter
41, it actually tunes to real channel 35, and it's not NTSC. It's ATSC
8VSB. So this must have been one of the thousands of different TV's out
there that you missed testing.:-)

No, it's just been set up to do so by you. Out of the box the above didn't
exist.

Nice try, again.

And please, no more yarns about how you have your OTA channels set up.
It's quite irrelevant.

And why is that? If my TV system will do it, so can any other one if
implimented. I've already explained how the TV scans the channels when
you set it up and stores virtual channel information from the scan in
translation tables. It appears to me that you don't have the first clue
how it works with new digital TV's. Tuning 49 on an old TV will get you
only NTSC channel 49. This is not the case with newer TV's with digital
channels. Converter boxes are one good example. Putting 49 into the
remote will go to virtual channel 49.1. And that broadcast can be on ANY
real channel number from 2 - 82.

OK. I'll try explaining the difference between OTA and cable to you.

In brief:

PSIP information is sent by each terrestrial broadcast as per the ATSC
specification. This channel information is NOT sent by cable channels
such as ESPN because a) their channel assignment varies from cable system
to cable system, and b) they are not sent to the cable system via ATSC.
Cable systems send channel numbering information to their STBs by way of
what's called FDC (forward data channel.) The frequency at which it is
sent varies from cable system to cable system, and therefore is not
received by standard TV sets. Additionally, it is QPSK.

So for receiving standard cable channels, whole number channels such as
49 and 50 are 6MHz wide NTSC channels with video and audio carriers.

RickMerrill wrote:

UCLAN, how old ARE you anyway?

You're ripe!

Ah...can't argue specifics, so resorts to mindless blather. Typical...

RickMerrill wrote:

Many cable system today have dropped analog altogether so those
cable-ready sets now must have a STB.

Not that many. Then there are alternatives.

http://www.broadlogic.com/products/terapix.php