AM IBOC

[tdee]

Do A google for NRSC-5 and read about IBOC NRSC-5


The mask is not what the FCC agrees on...

Rene Tetro of WFIL sent my friend the info...Rene if you read this let us know what stations you said in your email that are having problems.

Remember I told you so,you can't mix analog with digital on AM, It's one or the other.

It's great for FM and TV. I have A DTV off air receiver and it works well. I took down my VHF antenna and put up a UHF Yagi.

If manufactors make better AM wideband radio's, there's no need for IBOC on AM.

If AM is processed right it can sound very good...The problem is that everyone relys on Optimods and Compellors. To get a AM audio chain to sound right it takes alot of time and a good ear and the right songs to adjust your procecessor, Compressor,Audio Gain rider and EQ and not to forget your to add your NRSC filter. You can get rich Bass and nice highs if you work at it. Believe me I've done it to many stations....

 

[westlife]

> Remember I told you so,you can't mix analog with digital on
> AM, It's one or the other.

None of the 40 AM stations licensed to NJ are currently transmitting IBOC, and I hope it stays that way. With one AM IBOC station in New York (710 WOR) and one in Philly (950 WPEN), that should be enough for just about everyone in the Garden State to hear with their own ears just how horrible the interference caused by IBOC is -- and how unacceptably rotten the audio quality of AM IBOC's 5 kHz analog signal is. Even a crank-up Victrola with a worn-out needle sounds better playing music than WPEN does when they have the IBOC on!

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[tdee]

> > Remember I told you so,you can't mix analog with digital
> on
> > AM, It's one or the other.
>
> None of the 40 AM stations licensed to NJ are currently
> transmitting IBOC, and I hope it stays that way. With one
> AM IBOC station in New York (710 WOR) and one in Philly (950
> WPEN), that should be enough for just about everyone in the
> Garden State to hear with their own ears just how horrible
> the interference caused by IBOC is -- and how unacceptably
> rotten the audio quality of AM IBOC's 5 kHz analog signal
> is. Even a crank-up Victrola with a worn-out needle sounds
> better playing music than WPEN does when they have the IBOC
> on!
>
IBOC is not being excepted by the FCC, I'm told by reliable sources the NRSC masks were fudged. Let's face it, AM IBOC will not work because of the HASH it makes.

I just added the Ariane processor to my AM station WNNJ-AM into the Optimod and it sounds loud and crisp... AM can sound great if engineers would just take more interest in there audio chain. Drive up to North Jersey sometime and compare WNNJ 1360 to other oldies stations WRNJ 1510 WMTR 1250 and WGHT 1500.

Let me know what you think.

Read about the Ariane at www.translantech.com

 

[westlife]

> I just added the Ariane processor to my AM station WNNJ-AM
> into the Optimod and it sounds loud and crisp... AM can
> sound great if engineers would just take more interest in
> there audio chain. Drive up to North Jersey sometime and
> compare WNNJ 1360 to other oldies stations WRNJ 1510 WMTR
> 1250 and WGHT 1500.

I did that yesterday and WNNJ sounded very tinny and dull compared to WMTR. Has Clear Channel forced WNNJ to comply with their 6 kHz audio bandwidth standard for AM music stations? That's what it sounded like... while WNNJ does have a bright midrange, the lack of those high frequencies above 6 kHz really hurts the audio quality. WNNJ's audio is not as bad as WPEN's truly horrible 5 kHz audio, but it's not nearly as good as WMTR's full 10 kHz audio, either.

As far as great-sounding AM stations go, currently my favorite is 900 CHML from Hamilton, Ontario, Canada, whose 50,000-watt signal often comes booming into NJ via skywave at night. On a hi-fi receiver like a GE Superadio III, they sound even better than FM, with a very crisp high end.

 

[Techman]

I was in the process of moving the processing to the studio abd the reason it was tinny was because I was running back and forth to the TX from the studio and for a time it was double up NRSC filtering and the Negative and Positive peaks were out of spec. that's what you were hearing, try it tomorrow afternoon and over the weekend it should sound real good.....>

Let me know


I just added the Ariane processor to my AM station WNNJ-AM
>
> > into the Optimod and it sounds loud and crisp... AM can
> > sound great if engineers would just take more interest in
> > there audio chain. Drive up to North Jersey sometime and
> > compare WNNJ 1360 to other oldies stations WRNJ 1510 WMTR
> > 1250 and WGHT 1500.
>
> I did that yesterday and WNNJ sounded very tinny and dull
> compared to WMTR. Has Clear Channel forced WNNJ to comply
> with their 6 kHz audio bandwidth standard for AM music
> stations? That's what it sounded like... while WNNJ does
> have a bright midrange, the lack of those high frequencies
> above 6 kHz really hurts the audio quality. WNNJ's audio is
> not as bad as WPEN's truly horrible 5 kHz audio, but it's
> not nearly as good as WMTR's full 10 kHz audio, either.
>
> As far as great-sounding AM stations go, currently my
> favorite is 900 CHML from Hamilton, Ontario, Canada, whose
> 50,000-watt signal often comes booming into NJ via skywave
> at night. On a hi-fi receiver like a GE Superadio III, they
> sound even better than FM, with a very crisp high end.
>

 

[ontheair247]

> > Remember I told you so,you can't mix analog with digital
> on
> > AM, It's one or the other.
>
> None of the 40 AM stations licensed to NJ are currently
> transmitting IBOC, and I hope it stays that way.

A few months back, during the winter I believe, WPAT had it on 930 kHz. The wide band hash noise used to wipe out the 910 kHz signal from WRKL in that area fairly badly. Luckily it's been off since then.

That was a fairly legit degradation to the adjacent station that would reappear all over the dial and all over the country. Situations like this would have to be resolved before and if it gets implemented or else adjacent and second adjacent AM stations stand to lose a good deal of listernership & coverage.