RadioDiscussions.com

 
RadioDiscussions.com Discussion Boards
Login May 20, 2013, 10:16:13 AM *
Username Password Session Length
 
Welcome, Guest. Please login or register. Did you miss your activation email? Did you forget your password?
:  
   Home   Help Search Contact Us Login Register  
Pages: 1 2 3 4 5 6 7 [8]   Go Down
  Print  
Author Topic: ABC CITADEL AM STATIONS SUSPEND NIGHTTIME IBOC  (Read 14891 times)
dumber than a box of hair
rimember

Offline Offline

Posts: 1709


Re: ABC CITADEL AM STATIONS SUSPEND NIGHTTIME IBOC
« Reply #70 on: October 07, 2007, 03:56:54 PM »

You know I hate to harsh everyones buzz here, but I think this goes back once again to concerns regarding DXing, listening via skip, or even out of market fringe listening.  So let's see here...I own a AM station with increasing competition and losing ground from FM, I-Pods, the Internet, etc.  Now I can increase my coverage area, improve the audio frequency response and greatly improve signal to noise, and potentially turn off my analog portion someday thus finally competing with FM...Hmmm...that's a no-brainer.  Especially now that Ford/Visteon announced last week that many of their car radios will finally be equipped with the Ibquity modems.  THAT my friends changes the landscape!  Would I give a rats-arse about someone who will never visit my advertisers?  No!  DXing is a hobby for a very small minority.  What do I care whether the analog noise floor outside of my market goes up??

Okay I have my Kevlar suit on, bring it!

You fried right through that Kevlar all on your own.

1) It's not DXers whose complaints we're talking about.  It's station owners, whose stations are being interfered with within their own nighttime interference-free contours.  You don't light up carriers on adjacent frequencies and pretend they will do no harm during nighttime propagation conditions.

2) Ford announced no such thing.  The HD radios are a dealer-installed option...and according to a long-time friend who also runs a Ford dealership, this is an off-the radar non-starter.

No one's denying that AM has severe and increasing problems drawing listeners.  However, increasing interference between stations and effectively destroying the AM band is not the way to fix what ails it.
Logged

"A nation of sheep will beget a government of wolves." - Edward R. Murrow
PhilGalasso
Guest
Re: ABC CITADEL AM STATIONS SUSPEND NIGHTTIME IBOC
« Reply #71 on: October 08, 2007, 01:40:02 PM »


I predicted that we would see some of this stuff in the Dayton flea market in less than five years, but the AM HD exciters may be showing up on eBay as soon as next week.  Ten bucks would be a fair offer -- you might be able to re-use the power supply for a ham radio project.

Or that stuff could find its way to a third country, and, from there, to Castro's Cuba. The AM IBOC stuff would make dandy jamming stations for stuff that the Cuban government does not want its people to hear!
Logged
SUPERCASTER
rimember

Offline Offline

Posts: 1760


Re: ABC CITADEL AM STATIONS SUSPEND NIGHTTIME IBOC
« Reply #72 on: October 09, 2007, 03:48:30 AM »

Part of the AM HD digital signal (noise) is -26db directly under the 0 to 5kHz analog modulation of the AM HD station, and is especially objectionable with more signal and the closer you get to the HD transmitting station.

1- How is that DX?
2- What does that have to do with DXers?
3- How would narrowing the bandwidth on an analog radio eliminate this digital noise, without also eliminating the analog modulation?

The closer you get to an AM HD stations transmitter the more channels are obscured by loud digital hiss.

See questions 1 and 2 above.

When adjacent channel digital noise from an AM HD station is loud and annoying when listening within the 1mV/m daytime groundwave coverage of a first adjacent AM station (victim) I call that interference or jamming. You call that DX. Roll Eyes

ADDENDUM- Note digital HD hiss -26dBc directly under 0 to 5kHz analog audio of the transmitting AM HD station, proving the addition of HD digital signals degrades the AM HD host station's analog signal to noise ratio, not to mention cutting frequency response in half to accommodate the HD noisy digital sidebands.

http://topazdesigns.com/iboc/AM-IBOC-Spectrum-v3.jpg

Reference:
http://topazdesigns.com/iboc/AM-IBOC-Parameters.html
Logged

"HD RADIO- MAKES FM SOUND LIKE AM, AND AM SOUND LIKE CRAP!"
SUPERCASTER
rimember

Offline Offline

Posts: 1760


Re: ABC CITADEL AM STATIONS SUSPEND NIGHTTIME IBOC
« Reply #73 on: October 09, 2007, 04:05:20 AM »

Kelly said:
Quote
Especially now that Ford/Visteon announced last week that many of their car radios will finally be equipped with the Ibquity modems.  THAT my friends changes the landscape!


Box of hair said:
Quote
2) Ford announced no such thing.  The HD radios are a dealer-installed option...and according to a long-time friend who also runs a Ford dealership, this is an off-the radar non-starter.

Isn't a "dealer installed option" anything anyone can bribe a dealer to install?

If I bribe a dealer to install a rumble seat does that mean it will become popular or standard equipment on most cars?

Of course not. Just more false claims from HD promoters.

No HD interference or complaints?
Quote

High quality from newer as yet to be discontinued HD radios?
Here is an owner's report on one of the newest HD radios:
Quote

« Last Edit: October 09, 2007, 04:17:08 AM by SUPERCASTER » Logged

"HD RADIO- MAKES FM SOUND LIKE AM, AND AM SOUND LIKE CRAP!"
Pages: 1 2 3 4 5 6 7 [8]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP

Postings on Radiodiscussions.com are the opinions of the people who post them. Views expressed do not necessarily represent the views of Radiodiscussions.com or its owner or operator. In fact many of the views expressed here are just plain wrong. But they are opinions and this site allows us all to discuss those opinions. Any reliance on information posted is done so at the user's own risk. For a detailed look at the rules, regulations and uses of Radiodiscussions.com please see our TERMS OF SERVICE.

Valid XHTML 1.0! Valid CSS!
Page created in 0.387 seconds with 20 queries.