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Weird 8200/6010 issue

L

listner1

I have several stations that use 8200 processors with a mosley 6010 transmitter. All use the composite output of the 8200 directly into the 6010. I've noticed during big program pops such as the EAS relay box switching back and forth, and audio from the national weather service will cause the 6010 to briefly unlock. Now at one station, the current song by Bruno Mars "It will rain" causes the 6010 to unlock for extended periods in the beginning and end of the song. I'm guessing some frequencies are not being controlled by the 8200.

The station is live half the day and takes Dial Global's AC the rest of the day. We had imported the song into our automation (no data compression) and had this problem. After re-dubbing it real time through the analog input, saving as a 320kb mp2, the problem went away when played locally. However it's still doing it when the Satellite network plays it. Any ideas on what this is and a fix?
 
It's the low frequency "Axel F" phenomenon...there's another thread discussing this Bruno Mars song, which has a lot of very low frequency synthesized sound effects. Unlocks the AFC.

You need to roll-off this low frequency energy below about 30 hz. A simple, inexpensive solution might be this:

http://www.bswusa.com/Equalizers-ART-355ART-P501.aspx

A long term solution is to get a more modern processor, such as an Omnia One, that has built in high-pass filtering. The 6010 may be sensitive to these low frequencies, but so are other STL transmitters and exciters. I had a similar problem with the Armstrong STL & an Energy-Onix exciter.
 
Sounds like this may cause problems for a lot of other stations. Try emailing Dial-Global Net Ops about the song and see if they can HPF it in their playout system. Ironically, this would not be a problem if they were still using subaudible tones because the program audio was run through a 50 Hz HPF to keep from falsing the decoders. The digital delivery system is probably good down to DC. For your local play, run the song through cool-edit or other editor, HPF it and re-record it.
 
Yes, it's the dreaded AFC unlock. Rip the song in Adobe or whatever you use and roll off everything below 40Hz, at least.

I'm amazed at the number of those PCL-6010's that are still out there. I'm pretty sure those are single speed AFC loops.
 
Never had a problem with a 6010 AFC unlock.
The BE FX-30 exciter on the 6030 output would.
Temporary fix was to enable the HPF in the 8400.
Permenent fix was replacing the BTF-20E1 & it's FX-30 exciter.
 
Hey gang,

After I was referred to the other posts about the problem with this song, we asked DG to roll off the low end on that song. They did and problem resolved! I also suggested to the VP of Engineering that they might want to get their programming folks and TM studios together with the record company to let them know about the problem. Hard to believe that this was intentional. The frequencies that were causing this were extremely low, like down in the 5hz range.

Thanks all!
 
Leave the HPF in, anyway. I'm not familiar with the 8200, or this would be my first suggestion.

Unless you are a pure music station, there always be a variety of pops and clicks (the EAS you mentioned, for example--or a noisy remote) that will get into the system.

Down the road, this may also indicate that the 6010 could stand, at least, a re-cap.
 
listner1 said:
! I also suggested to the VP of Engineering that they might want to get their programming folks and TM studios together with the record company to let them know about the problem.
Click to expand...


Yeah, good luck with that. They'll probably remaster the song to keep your 6010 AFC from unlocking. :p
 
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