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#4713296 - 04/01/18 02:33 PM OTA channel rescan day???
daves66nova Offline


Registered: 04/11/04
Posts: 3643
Loc: los angeles
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#4713300 - 04/01/18 02:41 PM Re: OTA channel rescan day??? [Re: daves66nova]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2384
Loc: Wet side WA
Is this going to make your current TV obsolete if you're not on cable?
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#4713302 - 04/01/18 02:46 PM Re: OTA channel rescan day??? [Re: daves66nova]
cpayne5 Offline


Registered: 12/28/05
Posts: 582
Loc: Virginia
No, some channels are just changing frequencies.

So, if you use OTA TV, you'll need to have your tuning device simply rescan after the switchover occurs.

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#4713399 - 04/01/18 04:34 PM Re: OTA channel rescan day??? [Re: daves66nova]
eljefino Offline


Registered: 06/15/03
Posts: 32383
Loc: ME
Are people really this thick?

"Where'd it go? It must be gone!"

Computers are smart, you just have to give them the "go" button.

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#4713425 - 04/01/18 05:08 PM Re: OTA channel rescan day??? [Re: daves66nova]
Crispysea Offline


Registered: 04/14/17
Posts: 366
Loc: TN USA
The FCC sold another block of channels? They’ve done it four times now. They sold 70-83 for cellphones in the ‘80s. I could hear analog phones on old TV’s after that. They sold off 52-69 after the digital changeover in 2009. That became LTE for mobile data.


Edited by Crispysea (04/01/18 05:09 PM)

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#4714133 - 04/02/18 01:17 PM Re: OTA channel rescan day??? [Re: daves66nova]
daves66nova Offline


Registered: 04/11/04
Posts: 3643
Loc: los angeles
Any date when all this changing is finalized?
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#4715162 - 04/03/18 12:51 PM Re: OTA channel rescan day??? [Re: eljefino]
Vikas Offline


Registered: 07/22/05
Posts: 11209
Loc: NorthEast
Originally Posted By: eljefino
Are people really this thick?

"Where'd it go? It must be gone!"

Computers are smart, you just have to give them the "go" button.


Hold on a second here! Since you think you are a genius, please tell me why OTA channel rescan takes hours on a typical tuner? Also since the station already advertised that they are moving to channel (e.g.) 12.234 why doesn't a tuner allow me to enter that number directly rather than it having to re-scan and taking hours to do it. AND then I have to spend more hours to delete all the junk channels that it finds?

See, you just got me started on this and it is all your fault!!

Seriously, that whole design seems to have been made with the sole purpose of driving me nuts.

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#4715218 - 04/03/18 02:09 PM Re: OTA channel rescan day??? [Re: Vikas]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35565
Loc: Great Lakes
Originally Posted By: Vikas
Since you think you are a genius, please tell me why OTA channel rescan takes hours on a typical tuner?

Hours?

I just checked one of my TVs - it took 1.5 minutes.
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#4715270 - 04/03/18 02:53 PM Re: OTA channel rescan day??? [Re: daves66nova]
Vikas Offline


Registered: 07/22/05
Posts: 11209
Loc: NorthEast
I guess my TVs are old. It takes at least an hour on two different TVs. And what about my point of having to get rid of the hundreds of shopping channels that it finds?

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#4715315 - 04/03/18 03:45 PM Re: OTA channel rescan day??? [Re: daves66nova]
MoneyJohn Offline


Registered: 03/01/12
Posts: 165
Loc: Southern NY
Mine is a 3-year-old Samsung and it takes about 30-35 minutes. I get a ton of channels at my current place but at my previous place where I would get 2 or 3 that I could watch, would take less than 5 minutes.
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#4717060 - 04/05/18 10:05 AM Re: OTA channel rescan day??? [Re: daves66nova]
Vikas Offline


Registered: 07/22/05
Posts: 11209
Loc: NorthEast
I think the point I was trying to make as an engineer is what is underlying reason why a gigaflops CPU inside that tuner takes hours to do something which should take no more than a full minute? This seems to be deliberately made it run extremely slow. Your OEM car radio scans a band and stores best stations in few seconds at most.

I also recall that scanning in analog world when cable tuners started appearing on TV sets was very quick. There has to be dirty politics involved to make the ATSC tuners so annoyingly slow to scan.

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#4717124 - 04/05/18 11:10 AM Re: OTA channel rescan day??? [Re: daves66nova]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35565
Loc: Great Lakes
I hear ya. These are all valid questions that I'd like someone to answer for us.

The only thing I can think of is that up until recently with the advent of smart TVs, most TVs had pretty weak chipsets, and maybe the digital TV spectrum is much more vast than the FM spectrum that your car radio tuner has to deal with. The digital TV has channels and subchannels, almost like an entire separate frequency range for each channel. Still, for this scan to take hours is inexcusable.
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#4718938 - 04/06/18 09:45 PM Re: OTA channel rescan day??? [Re: Quattro Pete]
MCompact Offline


Registered: 07/21/02
Posts: 4059
Loc: KY
Originally Posted By: Quattro Pete
Originally Posted By: Vikas
Since you think you are a genius, please tell me why OTA channel rescan takes hours on a typical tuner?

Hours?

I just checked one of my TVs - it took 1.5 minutes.


My Kuro Elite takes several minutes, but it's a 2008 model. Hours? Crazy.
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#4719220 - 04/07/18 08:14 AM Re: OTA channel rescan day??? [Re: daves66nova]
alarmguy Online   content


Registered: 07/10/12
Posts: 2067
Loc: South Carolina
Im clueless, 5 TVs in my house, I can rescan in minutes, heck, by the time it takes to start one scan on one TV they would be done faster then I can start the scans on all the TVs :o)
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#4719365 - 04/07/18 10:39 AM Re: OTA channel rescan day??? [Re: Vikas]
eljefino Offline


Registered: 06/15/03
Posts: 32383
Loc: ME
Originally Posted By: Vikas
Originally Posted By: eljefino
Are people really this thick?

"Where'd it go? It must be gone!"

Computers are smart, you just have to give them the "go" button.


Hold on a second here! Since you think you are a genius, please tell me why OTA channel rescan takes hours on a typical tuner? Also since the station already advertised that they are moving to channel (e.g.) 12.234 why doesn't a tuner allow me to enter that number directly rather than it having to re-scan and taking hours to do it. AND then I have to spend more hours to delete all the junk channels that it finds?

See, you just got me started on this and it is all your fault!!

Seriously, that whole design seems to have been made with the sole purpose of driving me nuts.


I'll preface this by saying I worked in tv 17 years and am happy to be out!

Stations used to brand themselves by their channel. Cable came along and channels 2-13 pretty much stayed in their spots on cable, barring fisticuffs between the station management and cable. So that didn't matter.

Then cable started moving stations around so we got branding like (City of license's)NBC so people wouldn't get hung up on a channel.

ATSC was on the horizon so included in the spec was a virtual channel. Even worse there were two transmitters operating simultaneously for the transition time. One could be on the frequency channel 43 and the other on analog 51. When you'd engage a tv to scan it would look for an analog signal then a digital one in the same space. For branding purposes ATSC lets one give a virtual channel number to that 43 frequency so you could call it 51-1, 51-2 etc. When there were still analog signals I'd channel-up and hit 51 then 51.1, 51.2.

I would only assume when the tv slows down it's on a marginal frequency where there could be something but it's not really sure. At least I see mine struggle.

The junk channels pay bills. One transmitter just got sold in my market and how has six Ion subchannels, 3 of which are shopping. They suck! It's like you have to hang a mailbox to get your tax return but there's all sorts of junk mail that comes along for the ride.

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