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ATSC for pensacola, fl

Added by Joshua Welch over 9 years ago

I work for the cable company, so I have access to our frequencies. I pulled them up and got this for clear qam stations:

FCC Desig    Base Freq    Video Freq    Audio Freq    BTSC    SAP    EAS    Comm Ins    Program Type    Mod Type    Content    Set Top Chan    Rev Date
110    708    711    0                    Digital AGC    256 QAM    WJTC HD    1016    05/27/2011
110    708    711    0                    Digital AGC    256 QAM    WSRE 4    695    05/27/2011
110    708    711    0                    Digital AGC    256 QAM    WSRE HD    1009    05/27/2011
110    708    711    0                    Digital AGC    256 QAM    WSRE SD 2    693    05/27/2011
110    708    711    0                    Digital AGC    256 QAM    WSRE SD 3    694    05/27/2011
104    672    675    0                    HD Broadcast    256 QAM    FOX - WALA    1010    10/27/2011
104    672    675    0                    HD Broadcast    256 QAM    The Country Network    119    10/27/2011
104    672    675    0                    HD Broadcast    256 QAM    WEAR - ABC    1003    10/27/2011
106    684    687    0                    HD Broadcast    256 QAM    ESPN HD    1040    10/27/2011
106    684    687    0                    HD Broadcast    256 QAM    ESPN U HD    1322    10/27/2011
106    684    687    0                    HD Broadcast    256 QAM    TBS HD    1007    10/27/2011
108    696    699    0                    HD Broadcast    256 QAM    Local Origination    98    10/27/2011
108    696    699    0                    HD Broadcast    256 QAM    WDPM    17    10/27/2011
108    696    699    0                    HD Broadcast    256 QAM    WFNA HD    1015    10/27/2011
111    714    717    0                    HD Broadcast    256 QAM    METV    699    10/27/2011
111    714    717    0                    HD Broadcast    256 QAM    WKRG HD    1005    10/27/2011
111    714    717    0                    HD Broadcast    256 QAM    WKRG Radar    697    10/27/2011
111    714    717    0                    HD Broadcast    256 QAM    WPMI HD    1008    10/27/2011
111    714    717    0                    HD Broadcast    256 QAM    WPMI WxPlus    696    10/27/2011
39    312    315    0                    HD Broadcast Must Carry    256 QAM    The Cool TV    118    08/01/2011
39    312    315    0                    HD Broadcast Must Carry    256 QAM    WFGX HD    1020    08/01/2011

I tested them and found that 717,000 kHz, 711,000 kHz, 699,000 kHz, 675,000 kHz, 315,012 kHz are the correct frequencies for this area, and I pull 18 channels up from it.

How can this information be added to the default list of muxes, so others can choose it?


Replies (4)

RE: ATSC for pensacola, fl - Added by Hein Rigolo over 9 years ago

Joshua,

tvheadend takes it information about muxes from the lists that are maintained by the dvb-apps suite of tools.
You can browse the lists here:
http://linuxtv.org/hg/dvb-apps/file/69fc03702a64/util/scan/atsc

As you can see there are not many lists available for atsc. This is mainly because there are a couple of standard lists with all possible frequencies that are defined in the US.

So if you take one of these standard list you should also get the same results. Any mux that you do not need can then be removed from tvheadend via the GUI.
Can you try if you get the same results if you use for example the "us-Cable-Standard-center-frequencies-QAM256" list of predefined muxes?
(I picked that one because it contains the frequencies that you mentioned)

If you like a smaller list, then you can format the list according to the standards for ATSC frequencies list and then submit them to the linux-media mailing list for inclusion in the dvb-apps suite of tools.

Hope this makes things clear for you.

Hein

RE: ATSC for pensacola, fl - Added by Joshua Welch over 9 years ago

I came up with

# Pensacola, FL frequencies

A 315012500 QAM256
A 675000000 QAM256
A 699000000 QAM256
A 711000000 QAM256
A 717000000 QAM256

based on that list.

Does that look like what I should send to the mailing list? Can you provide the mailing list address?

Thanks!

PS: Yes I used the standard QAM256 list. The problem was that it found over 2000 services and was so slow it would take days to scan. This list is much more manageable.

RE: ATSC for pensacola, fl - Added by Hein Rigolo over 9 years ago

well, you can always remove unwanted muxes from the list while it is scanning. That way you end up with less muxes and is it finished sooner.
Also .. I would name the file based on the cable network that you are attached to (comcast? cox?)

You can find the information about the mailing list here:
http://linuxtv.org/lists.php

Are you sure the first frequency is correct? I find it weird that it has a different offset then the others.
And .. are there any "Network Information Tables" on an ATSC cable network? so that the information about other valid muxes is transmitted together with the digital signal?

Hein

RE: ATSC for pensacola, fl - Added by Joshua Welch over 9 years ago

Yea it is just hard to remove them while it is scanning because it jumps around a lot.

The first frequency is correct, it gives MyNetworkTV and CoolTV, it is odd that it is an "off numbering". I work for cox, so I can't comment on any other provider in the area.

I'm not sure what "Network Information Tables" are, it does transmit stations names if that is what you are talking about.

The mailing list address I found is:

Is that right? I changed the header to this:

  1. Pensacola, FL frequencies - Cox Communications
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