qam technology?

Archived from groups: alt.tv.tech.hdtv (More info?)

"mikeeee" <slashrider@yahoo.com> wrote in message
news:41AFF239.8D032BED@yahoo.com...
> I just bought the samsung T451(have'nt hooked it up yet). I was reading
> the manual, and it says qam capable. what does this mean? sorry for the
> "laymans" question.. thanks for your help. mike

Quaddrature amplitude modulation, QAM is the method that cable companys have
encoded HD onto cable. IF your Set Top Box supports QAM you can receive
unscrambled HD off cable.

Archived from groups: alt.tv.tech.hdtv (More info?)

"Jeff Rigby" <jffg2@comcast.net> wrote in message
news:ZrWdnQlNN8pc1C3cRVn-gg@comcast.com...
: Quaddrature amplitude modulation, QAM is the method that cable
companys have
: encoded HD onto cable. IF your Set Top Box supports QAM you can
receive
: unscrambled HD off cable.
:
:
I hooked my LG LST3510 up to Charter's cable with digital tier
service. I got fewer stations in HD than I get OTA here in Ft. Worth.
Needless to say, I'm very disappointed in Charter Cablevision.

Russ

Archived from groups: alt.tv.tech.hdtv (More info?)

mikeeee wrote:
>
> I just bought the samsung T451(have'nt hooked it up yet). I was reading
> the manual, and it says qam capable. what does this mean? sorry for the
> "laymans" question.. thanks for your help. mike


Mike:

I also received my new Samsung T-451 Digital Receiver ($250+ship)

7 days ago & hooked it up (one at a time) to my OTA

antenna & my TW Cable line..... It replaces mt Samsung T-151..

For OTA use it locks in on my 7 Digital/HD TV stations faster

or in the same time...It locks in on my ABC-HD Chan 23 (full Power)

Very fast where the T-151 waited up to 40 sec for a lock....


As for the QAM Cable channels, 451 works slowly & inconsistently...

The QAM options are: Standard, IRC (Incrementally Relater Carrier), &

HRC (Harmonically Related Carrier)....

Standard & IRC QAM Digital/HD channels run from 80 thru 125

and are very close to the same frequencies... Do a Google

on "Cable STD IRC HRC" and the tech features can be read....

THe 3 cable scans from Chan 1 to Chan 125 on the 3 modes

takes about 12 minutes total... including tons of Subchannels.

All my HD/Dig unencrypted channels lie from Chan 80 thru 123

for the STD & IRC option.... HRC seems dead???

I found 1 HD local Chan for QAM (1 out of 6 expected) &

(8 out of 12 expected) Digital SD channels....

DEleting the many, many QAM Sub channels was a real T-451

pain that I never successfully finished....

THis one hour T-451/ Cable session I better not ever get

rid of my SA3250HD QAM Cable set top box.....

If I had a cheat sheet from a local QAM expert....

who knew where the LOcal QAM HD stations were hidden..

I might try these HD station for Quality Pic study...

The T-451 will not pick up any QAM Analog channels nor

QAM encrypted Digital Stations.. That leaves few to view!!

It looks like the T-451 QAM feature is one step below Cable Card.