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HD INTERFERENCE

Savage said:
On the way into WYSL at 4am I noticed IBOC sidebands obscuring our signal well inside the one-mile point from our array where we customarily go to make annual harmonic measurements. Out of curiosity, I grabbed the FIM and drove back to the point where I judged that IBOC noise would be objectionable to an "average" listener. HD hash was invading a WYSL signal of almost 18 mv/m!
Click to expand...

Bob,

Just remember to always drop power during critical hours -- and don't allow your night pattern get out of tolerance -- otherwise,you might be cited for a major violation -- on the grounds that WHO's skywave service is no longer fully protected. It would be a disgrace if any of their listeners suffered from your carelessness.
 
Drove from northern Wisconsin back to Chicago last night.
Didn't check everything, but noted that WSM 650 was undamaged and very strong.
Only WGN was running iBOC, wiping out 710 and 730. 700 and 740 were audible but ruined for listening.
While I was still pretty far north, WABC or someone was crushing WBBM, usually very clear.
In the daytime, halfway between Minneapolis and Chicago, none of the iBOC sidebands were evident from any stations from either city.
Thats about 250 miles from each. I had no problems listening to either city. That's with my 1972 Motorola.
Last week in the 2004 Hyundai, the radio's sensitivity was so low there was a 150 mile stretch where neither city's stations came in.
I can't believe these are considered acceptable...blech.
 
I've noticed that some stations are playing with their HD, turning it on and off several times during the night, WFAN seems to do it the most, and sometimes WBZ will shut theirs off for a bit then turn it back on, as does WTAM. Most of the time I can null out some of the noise on certain stations, but I'm at home, not in a car, where that's not possible. I feel for WYSL, since, although I'm nowhere near it's listening area, I was able to hear it at night, and now...there's nothing at 1040 and WBZ's hash was even spilling onto 1050. It's a long way from Ottawa to Boston. The worst offender here is WJR, wow, their hiss is out of control.
 
Guys - appreciate the reports and the kind thoughts. See page four - complaint procedure. Please be sure you do this - don't just complain to each other. Thanks.
 
I have called one of our local stations here, and told them about the interference I was getting from another station running IBOC on an adjacent frequency, I wasn't the first to do so, and I let them know what they can do on their end, in fact I read them the post on page 4. The Engineer was less than happy about it, and even the receptionist was less than thrilled that this was happening to their station. My next step is to go to industry Canada directly.
 
Way to go mimo - Americans make sure you do the same. mimo might want also to contact Barry McLarnon, the leading Canadian IBOC-AM skeptic, for specific ways to be an effective activist north of the border:

[email protected]

Also read Barry's excellent treatise on the adjacent-channel problem:

http://topazdesigns.com/iboc/Interference-Calc.html

Guys, if you merely blog and complain - you're doing just what iBiquity and the "usual suspects" are betting you'll do.
 
Guys - don't forget - talk to the GENERAL MANAGER and the SALES MANAGER at the station being interfered with. The CE might not like the interference report but you take the risk he'll just e-mail his consultant or stick it in a file folder, "interference complaints." The way to get action is to hit the station in the revenue stream. Tell the GM you're going to stop listening if they can't do something about it. Tell the sales manager you're going to stop patronizing station advertisers if you can't hear their sponsor messages.

Promise them you'll check back in a couple of weeks to see if they've taken any action on the interference. Then FOLLOW THROUGH. Follow up any verbal complaint with a letter or e-mail.

Every station gets "interference complaints" and some engineers take them more seriously while some just view them as a nuisance, which is what the IBOC lobby is betting. The typical CE is completely swamped with studio issues, IT issues, construction projects, maintaining aging facilities in a big cluster with fewer guys than he used to have, etc.

That's why it's vital to strike at the blood supply, the audience and the bucks. Contact the top management. Reaching out to the sales manager is especially effective. The GSM/LSM is NOT used to getting comments from the general public, so you'll DEFINITELY get his/her attention with this approach.
 
The Dude said:
I dont think the FCC cares,they are making LOADS OF $$$$ from this unfortunetly.........
Click to expand...

They are not making a cent. In fact, the porcessing costs them money.
 
I did also send an email to the General Manager and Programme Director of the local station explaining what was going on and told them who the interfering station is. I haven't contacted the 2 Montreal stations that are also suffering interference here, not yet anyway. I'm going to email Mr. McLarnon and let him know what I've encountered here.
 
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