San Francisco, CA - OTA - Page 397 - AVS | Home Theater Discussions And Reviews
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post #11881 of 11890 Old Yesterday, 01:06 AM
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Quote:
Originally Posted by SFischer1 View Post
I am having a horrible delay with page 396 of this thread.
SHF
I've had a few times lately where it taken some time to connect to AVS, but I haven't noticed any delay once I'm connected, including page 396. Wonder what's causing the problem.

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post #11882 of 11890 Old Yesterday, 08:35 AM
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[QUOTE=SFischer1;32271337]KFSF went off the air ~ 6 AM it appears.

Check Toast0's chart for outages over a hour.

http://ruka.org/~toast/atscdata/chart.php?c=7

SHF

Ew, does that mean they are done, over and out? Was enjoying the movies.

What is this Channel 1 you guys speak of?

Thanks again, Paul
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post #11883 of 11890 Old Yesterday, 08:36 AM
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Quote:
Originally Posted by SFischer1 View Post
KFSF went off the air ~ 6 AM it appears.

Check Toast0's chart for outages over a hour.

http://ruka.org/~toast/atscdata/chart.php?c=7

SHF
Ew, does that mean they are done, over and out? Was enjoying the movies.

What is this Channel 1 you guys speak of?

Thanks again, Paul
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post #11884 of 11890 Old Yesterday, 12:02 PM
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Quote:
Originally Posted by PaulamI View Post
Ew, does that mean they are done, over and out? Was enjoying the movies.

What is this Channel 1 you guys speak of?

Thanks again, Paul
It's unlikely KFSF is off the air for good. Channel 1 is KAXT, a low power station transmitting from Fremont.

Chuck
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post #11885 of 11890 Old Yesterday, 05:50 PM
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Originally Posted by dr1394 View Post
AFD is Active Format Description. This is a method that attempts to display each frame correctly (mostly in an effort to avoid the postage stamp effect).

http://en.wikipedia.org/wiki/Active_Format_Description

Ron
Well, I presume that it would require the decoder to somehow handle the INFORMATION correctly, and now they don't handle basic stuff like the anamorphic flag (I assume it's a "flag") always...

And then there's the guys at the stations who don't seem to know how to set up anything correctly without trying a bunch of times at least. When KRON moved they went through about four iterations of 4-3 until they finally settled on what they wanted, but in doing so they revealed that they are actually a wide-screen channel, so they should have settled on 480i 16:9 anamorphic, but NOOOOO, they pillar-box their content. "Decades" channel 5-2 went through the same nonsense and revealed they too are actually broadcasting 16:9 content pillar-boxed to 4:3 for no good reason other than a certain number of TVs never got the memo about respecting the 16:9 anamorphic flag automatically...ALL channels should broadcast in 16:9 in this year of 2015 in my opinion, even my most brain-dead TV can be set to automatically expand anamorphic screen sizes for all 480i channels, most do it automatically anyway...

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post #11886 of 11890 Old Yesterday, 06:50 PM
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Help on Quality feedback

Hi Chuck and Larry and others,

I got some feedback from Al who is able to pick up KFTY-LD Channel 2 from Mt. St. Helena in the mountains near Yosemite. I think this is the furthest I know of anyone regularly watching an LPTV station (he is probably a few more miles away than Chuck, maybe 170 miles total). He says he picks up KFTY-LD 80% of the time, and only picks up KEMO 50 (RF 32) 30% of the time.

He said, only sub-channel 8 looked good on KFTY-LD. I'm running 2.4 Mbps on the .8 channel and the rest have been running 2.05 to 2.1 Mbps. So, I just now turned of the .9 channel on KFTY-LD and bumped up all of the rest of the channels so that everything is running 2.4 Mbps. Does everything look better to you? Granted, my .2 channel and .7 channels come from low quality feeds, but my .4 comes directly from a computer hooked into the mux / encoder, so it should look better as should the other sub-channels.

Perhaps I was too ambitious with 9 sub-channels. If so, then I'll stick with just 8 sub-channels going forward until I can afford a $130,000 encoder from Harmonic that can do 12 sub-channels. The Anywave encoder was about a tenth the price.

I did have problems with my Anywave encoder recentely where the static PSIP info disappeared. I restarted it, but now it looks like the .1 channel is saying .229. I'm asking Anywave for help.

Blessings,
Keith
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post #11887 of 11890 Old Yesterday, 07:50 PM
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Keith,

I just compared KFTY DayStar to KACA DayStar which is the only program they show. The color on KACA is over saturated. KFTY looks better in that regard. The video quality looks identical otherwise.

Maybe Al is expecting SD video to look like HD video.

I looked at the transmitter overlay in Google Earth for KFTY and there are a number of good spots on mountaintops west of Yosemite at around 170 miles. Al must be in just the right spot.

The most distant transmitter site that I can receive here is Mt. Toro at 132 miles. KMMD-LD 39 is the most reliable station from there with KION being second.

KFTY is essentially 100% based on signal strength. Occasionally it is affected by local noise and the May through July sporadic-E season gives it trouble at times.

Chuck

Last edited by Calaveras; Yesterday at 07:55 PM.
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post #11888 of 11890 Old Yesterday, 08:58 PM
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Quote:
Originally Posted by Calaveras View Post
It's unlikely KFSF is off the air for good. Channel 1 is KAXT, a low power station transmitting from Fremont.

Chuck
KFSF came back on the air ~ 1:40 PM March 3, 2015.


I thought they were going back off again when I saw utilization drop like just before they went off the air. But they are still working.


SHF
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post #11889 of 11890 Old Today, 01:47 AM
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I'll have to wait to comment on the quality of K03HY here. Conditions are doing that weird thing again where channel 3's signal is way down at cliff edge levels varying between 14 and 16 dB SNR right now and the picture is breaking up too much to do any quality checking. It normally comes in at 21 to 23 dB, so is about 7 dB weaker than normal.

For the past few days all of the stations that aren't on Sutro or Mt. San Bruno have been varying a lot. KTNC 42 from Mt. Diablo, KTLN 68 from Novato, KRCB 22 from Sonoma, and KEMO 50 from Mt. St. Helena have been holding fairly steady, only varying a few dB, but the Walnut Grove stations and the South Bay stations have been going up and down like yo-yo's as much as 10 dB. They've mostly been at their normal levels or below, and like K03HY, many of them have been floating with the cliff edge. I haven't seen any strong signals for several days now.

One interesting thing I've noticed is how KAXT 1 (RF 42) and KEXT 27 (RF 20) behave so differently from each other. Both are transmitting from Mt. Allison at the same height above average terrrain of 1916 feet, but KAXT is transmitting 15 kW and KEXT is only transmitting 3.6 kW. Neither station comes in here consistently. Sometimes I see one or the other of the two stations, and occasionally I see both at the same time, but not often. You'd think that since the signals are coming from the same place, they'd react the same, so their frequency must be the reason for the differences. I see KAXT 1 more, but when KEXT 27 comes in it's usually stronger, even though it is lower power. KAXT usually peaks at about 19 dB, while I've seen KEXT as high as 21 dB.

I have never seen a picture from the KGO translator transmitting from the same location, nor the KTVU translator from Monument Peak. The signals are there, but they're always below the 15dB cliff edge.

Larry

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post #11890 of 11890 Old Today, 02:18 AM
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Channel 3's signal is slowly rising and is now varying between 18 and 19 dB, so I've been able to take a look at the picture quality. I see an improvement on all 8 of the sub-channels compared to what I saw when there were 9 sub-channels. There's noticeably less pixelating when they do desolves and fades and the resolution looks better all the way around.

Larry

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