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Author Topic: full digtial AM test proposed for IBOC  (Read 5581 times)
Darth_vader
America's Vancouver
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Re: full digtial AM test proposed for IBOC
« Reply #60 on: July 05, 2012, 12:46:13 PM »

Quote
"Is anyone old enough to remember The Last Radio Station? I heard it on my LW receiver in 1973."

Well, WGU20 was apparently shut down in 1990, so technically I'd be old enough to remember it. But I didn't actually find out about longwave itself until several years later, about the same time I found out about shortwave! (My first SW radio, a secondhand Realistic DX360, also had a LW tuner.)

Are there even any audio recordings of WGU20 in its "golden era" floating about the network? Youtube's results are really pathetic.

Quote
"EBS and EAS have never had to work in a time of emergency and if the circumstances are dire enough for someone to attempt to activate EAS, it is very likely the system would fail."

That's not entirely accurate. I've been in eastern WA and OR during forest fire season and have heard evacuation warnings go out over the local EB/AS outlets (you know, the usual "get outta Dodge within the hour or Mother Nature'll reduce you to a smouldering chunk of carbon" kind of business) or even back in my part of the state during flood season. They really should have said
Quote
"EBS and EAS have never had to work in a time of national emergency...",
since I'd personally consider an out-of-control forest fire that's getting big enough to reduce your entire town to a pile of cllinkers to be a pretty significant emergency!
« Last Edit: July 05, 2012, 12:59:38 PM by Darth_vader » Logged

I am now posting aircheck files and such on Youtube under https://youtube.com/user/oldradiotapes on an experimental basis.

When downloading any of these files, please use only the type 22 (720-P) option when available, as it provides the highest-fidelity audio (MP4/192k AAC).
K6JHU
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Re: full digtial AM test proposed for IBOC
« Reply #61 on: July 05, 2012, 04:14:01 PM »

Sitting here in the middle of a thunderstorm. My NOAA weather radio has not gone off so I figure not to worry about this. But when it goes off at 3:00AM (like it did the other night), it gets my attention fast. I rely on NOAA rather than broadcast.
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K6JHU
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Re: full digtial AM test proposed for IBOC
« Reply #62 on: July 05, 2012, 04:18:17 PM »

Getting back on topic, didn't Ibquity have a test station on 1650 (or thereabouts) in the DC area for HD testing? Wonder if the experimental license could be resurrected for a one time test at full power. I can almost convince myself that an HD signal at 10 times the currrent power would really get coverage.
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ajc_trw
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Re: full digtial AM test proposed for IBOC
« Reply #63 on: July 05, 2012, 07:49:16 PM »

I've heard Radio Disney on a wideband AM stereo receiver, and couldn't tell the difference between that and FM.
I've heard Radio Disney on a modern iBOC radio and they sounded better than FM Tongue
Really? Do you have something you can post? Even 30 seconds can tell us if AM-HD really sounds as good as FM. Post us a file so we can hear for ourselves.

IOW: CALL!  Kiss Wink
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ai4i
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Re: full digtial AM test proposed for IBOC
« Reply #64 on: July 05, 2012, 07:59:18 PM »

Surely, would you like to sample it in 8 kbps or 16 kbps Huh
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ajc_trw
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Re: full digtial AM test proposed for IBOC
« Reply #65 on: July 05, 2012, 09:29:45 PM »

Surely, would you like to sample it in 8 kbps or 16 kbps Huh

320kbit mp3 or 192kbit AAC if not FLAC. Something, in your humble opinion, that is worthy of AM-HD.

So stop stalling and BRING IT!  Tongue  Smiley
« Last Edit: July 05, 2012, 09:34:59 PM by ajc_trw » Logged

ai4i
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Re: full digtial AM test proposed for IBOC
« Reply #66 on: July 05, 2012, 10:05:02 PM »

I just need to stall until I can figure out what software I need to find and what to do with it.
Sorry, I might have to resurrect my old signature message which I had been using everywhere for years, "ai4I is always on the trailing edge of technology".
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Darth_vader
America's Vancouver
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Re: full digtial AM test proposed for IBOC
« Reply #67 on: July 05, 2012, 11:59:31 PM »

Quote
"320K MP3 or 192K AAC, if not FLAC. Something, in your humble opinion, that is worthy of AM-HD."

Nope, 384K CBR MP2 @ 44100Hz or 48000Hz, if not uncompressed 16-bit PCM in either of those same sampling rates! I wouldn't dare use MP3 for anything except, maybe, speech. (And even then it's debatable whether or not that particular codec would actually be the one I choose....)

If you want to do things on the "trailling edge" (and I can't say I blame you) you should try this little "oldie-but-goody" audio programme; it has an MP1/2/3 encoder built in, and also seems to work properly under WINE:
http://www.din.or.jp/~ch3/scmpx_e.html (F.Y.I.: Don't be offended if you happen to get mooned by Pikachu.)
« Last Edit: July 06, 2012, 12:06:19 AM by Darth_vader » Logged

I am now posting aircheck files and such on Youtube under https://youtube.com/user/oldradiotapes on an experimental basis.

When downloading any of these files, please use only the type 22 (720-P) option when available, as it provides the highest-fidelity audio (MP4/192k AAC).
Zach
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Re: full digtial AM test proposed for IBOC
« Reply #68 on: July 06, 2012, 12:02:15 AM »

Mandate NOAA reception...that is a dedicated emergency information distribution network put in place for that reason.

This, I could get behind.

Didn't one of the recent Cadillac models include NOAA reception in the entertainment system?  I seem to recall a regional meteorologist mentioning it as proof that NWS weather radio in cars would work.  Just add the SAME programming (and link it GPS so it updates automatically where ever you drive) and it would be a pretty useful tool for drivers.
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Darth_vader
America's Vancouver
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Re: full digtial AM test proposed for IBOC
« Reply #69 on: July 06, 2012, 12:09:32 AM »

I do know some of the older Subaru models had it on the factory-stock Clarion radios, particularly the late-90s first-generation "Outback"-series cars. My Dad's 2001 Dodge Dakota also had it on its original factory radio (he's since  replaced it with an aftermarket Kenwood.)

Can't tell you a thing about Cadillacs, though.
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I am now posting aircheck files and such on Youtube under https://youtube.com/user/oldradiotapes on an experimental basis.

When downloading any of these files, please use only the type 22 (720-P) option when available, as it provides the highest-fidelity audio (MP4/192k AAC).
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