FM Works?? Listen to the Interference!

[jras20]

Listen to the Interference on my Radio that KBPA does I'm about 20 miles from KBPA And hear the Hash.

http://www.youtube.com/watch?v=7SPpL1FcOv8

 

[Savage]

Welcome home, jras20. We all knew you'd learn the truth. Don't fret...we all initially got sucked in too. Then we found out the ugly facts.

I assume KBPA is running digital at -20 dBc. Just imagine if you added 10 dB to that mess. Which is what they want to do.

 

[SUPERCASTER]

What! HD radio hash?

HD supporters have loudly and repeatedly proclaimed that hearing HD radio hash was absolutely impossible.

It seems they are wrong, as usual.

 

[Len14043]

I looked up KBPA on Radio-Locator and they are at 103.5 in San Marcos, Texas. Assuming the hash is from KBPA, the recording must have been made well within its 60 dbc contour to be strong enough buzz the 2nd adjacent. When I looked up the stations for San Marcos and set it to include the fringe stations, nothing shows up for 103.9. The question then becomes: If KBPA is buzzing all over 103.9, what station are they interfering with that would be of interest to the average listener?

 

[jras20]

Well Even on KHFI I can hear it hash over to 97.0 which could effect some of the translators if that effects any rules by the FCC? There is a translator on 97.1 in Austin, which that could be effected by KHFI's HD noise. I am roughly around 30-40 miles from KHFI.

 

[Len14043]

The FM band in the Cincinnati area is tightly spaced with signals on every other channel. I have never seen a station running IBOC interfere with a receivable station on the 2nd adjacent - even if the 2nd adjacent is in another market.

 

[4dude]

Don't fret...we all initially got sucked in too.

Not me!!! I knew this was garbage from the start!!

 

[SUPERCASTER]

The FM band in the Cincinnati area is tightly spaced with signals on every other channel. I have never seen a station running IBOC interfere with a receivable station on the 2nd adjacent - even if the 2nd adjacent is in another market.

Even at current 1% HD radio power levels who is right?

NPR’s analysis has been seconded by V-Soft Communications, LLC, another highly respected
engineering firm, in comments filed July 5, 2009. V-Soft says, “We are…aware of
IBOC’s propensity for causing interference to first, and sometimes second adjacent, analog
stations, often within their protected 60 dBu signal contours. For all the benefits of IBOC…we
cannot avert our eyes to the dangers of interference.” Protection of existing analog signals,
which the vast majority of radio listeners rely on now and will for many years to come, is
essential.

From
WFCR - University of Massachusetts

Link to FCC document:
http://fjallfoss.fcc.gov/prod/ecfs/retrieve.cgi?native_or_pdf=pdf&id_document=7019916718

The 10 times power increase demanded by HD radio supporters will just exacerbate the HD radio digital disaster.

 

[jras20]

I was a HD supporter until my last purchase was a mess up big time. My factory FM/AM radio pulls in 10 times better than that dual radio ever did in my truck.

 

[radioman148]

I was a HD supporter until my last purchase was a mess up big time. My factory FM/AM radio pulls in 10 times better than that dual radio ever did in my truck.

My HD radio is sitting on my closet shelf collecting dust. That's how impressed I am with HD.

 

[KB1OKL]

I was a HD supporter until my last purchase was a mess up big time. My factory FM/AM radio pulls in 10 times better than that dual radio ever did in my truck.

My HD radio is sitting on my closet shelf collecting dust. That's how impressed I am with HD.

My HD tuner is sitting on top of the analog receiver I use collecting dust and blinking at me.

 

[scanman1]

The last hd radio I had I busted real good, and it's now resting in pieces in a land fill!

 

[Sam The Record Man]

Strange, I passed through that area (Kyle / IH 35) not too long ago and all I got on 103.9 was Jack FM out of... College Station? Somewhere like that. 103.5's HD signal was strong on 103.3 and 103.7, but looking at a map now I see why - the transmitter is not far from Kyle.

If you're getting HD hash outside the first adjacents, I'd say there's a problem with your radio.

 

[KB1OKL]

Strange, I passed through that area (Kyle / IH 35) not too long ago and all I got on 103.9 was Jack FM out of... College Station? Somewhere like that. 103.5's HD signal was strong on 103.3 and 103.7, but looking at a map now I see why - the transmitter is not far from Kyle.

If you're getting HD hash outside the first adjacents, I'd say there's a problem with your radio.

Don't know very much about HD? Look up NPR's report.

 

[SUPERCASTER]

Strange, I passed through that area (Kyle / IH 35) not too long ago and all I got on 103.9 was Jack FM out of... College Station? Somewhere like that. 103.5's HD signal was strong on 103.3 and 103.7, but looking at a map now I see why - the transmitter is not far from Kyle.

If you're getting HD hash outside the first adjacents, I'd say there's a problem with your radio.

Don't know very much about HD? Look up NPR's report.

A brief on the NPR report again:

Even at current 1% HD radio power levels-

NPR’s analysis has been seconded by V-Soft Communications, LLC, another highly respected
engineering firm, in comments filed July 5, 2009. V-Soft says, “We are…aware of
IBOC’s propensity for causing interference to first, and sometimes second adjacent, analog
stations, often within their protected 60 dBu signal contours. For all the benefits of IBOC…we
cannot avert our eyes to the dangers of interference.” Protection of existing analog signals,
which the vast majority of radio listeners rely on now and will for many years to come, is
essential.

From
WFCR - University of Massachusetts

Link to FCC document:
http://fjallfoss.fcc.gov/prod/ecfs/retrieve.cgi?native_or_pdf=pdf&id_document=7019916718

The 10 times power increase demanded by HD radio supporters will just exacerbate the HD radio digital disaster.

If you're getting HD hash outside the first adjacents, I'd say there's a problem with your radio.

No, Sam The Record Man, that is just the way HD radio works.

If I dial an analog radio with an RF signal strength meter the hiss of IBOC (HD RADIO) carriers cover the entire Chicago FM dial.

Warren Shulz, WLS Radio eng.