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Omnia One Tech Question - HELP!

H

hulkhogan

??? ???
We received a brand spankin' new Omnia-1 FM last week. Hooked it up and it sounds very distorted. It does not sound that way near the transmitter facility, just as we get about 3 miles outside and it starts to just lose everything. The compression doesnt even sound good, with one song a little low and the other very loud.

Our levels are good coming out of the STL into the unit. Levels look good on the front of the unit after a little adjustment. We even set the Omnia to a standard preset to see if our "tweaking" from the first go-round had distorted the unit.

When we hook headphones up to the front of the unit, the music is nice and clear.

Any suggestions????
 
the headphones sound good? Try clipping them across the output of the box. Still sound good (and I bet they do)? Take a harder look at the path between the box and the exciter. Just for information, what is that path? Copper? Data reduced digital? Linear digital? Analog? etc.??
 
Classic phase reversal problem. You have a wire reversed on one input. Flip plus and minus on ONE channel.
 
We have one of these that has (had) the same problem.

We had no wires reversed or anything wrong. Put one of my Omnia 3 fm turbos and another processor I have in its place and they work fine.

Sent in to Omnia - they found nothing wrong. They are sending back. Will reinstall and see what happens.

I have 5 omnia 3's and they are awesome. The Omnia staff is awesome and are very helpful. They told me the headphone section is seperate from the stereo generator section so one can sound different then the other.

Let me know if you find anything and i will do the same.

Thanks good luck!
 
I'm having distortion problems with our Omnia One also. It replaced an aging Cutting Edge Unity 2000i processor. (I didn't have any issues or problems with the sound of that processor but instead just wanted to update to something newer with ethernet connectivity) Most of the presets on the Omnia One sound horrible and distorted (especially the ones with heavy bass). I ended up using the CGMighty80's preset from Cornelius Gould. It was the closest I could find that matched the full sound we had with the Unity 2000i. I had to lower some of the bass down on the preset but I can still hear a little distortion on some songs. If I lower the composite level down from 3.6v to 2.8v (or so) it cleans up the sound and it isn't that over driven/distorted but I loose my stereo pilot in the distant/fringe areas of our signal. I'm not that good when it comes to "tweaking" processor perimeters to lower the overall drive in the preset settings so I've lived with the occasional distortion.

Because of the affordability factor of the Omnia One, we just ordered four more. I'm hoping to resolve this issue soon so I will watch this thread closely to see what you all find out. Hopefully whatever resolves your problem will do the same for mine.
 
sounds like the composite output of the omnia and your exciter are not matched. what is the input on your exciter? i've seen some where 3.5ppv were ok and some where 1.25ppv input would be 100% modulation.doesthe omnia one sound ok in the headphone jack? it is a connection issue,i've taken these things out of the box, dialed up some of CG's amazing pre's and whamo.you are on the air. maybe 15 minutes total was all it took.
 
radioguy33 said:
We have one of these that has (had) the same problem.

We had no wires reversed or anything wrong. Put one of my Omnia 3 fm turbos and another processor I have in its place and they work fine.

Sent in to Omnia - they found nothing wrong. They are sending back. Will reinstall and see what happens.

I have 5 omnia 3's and they are awesome. The Omnia staff is awesome and are very helpful. They told me the headphone section is seperate from the stereo generator section so one can sound different then the other.

Let me know if you find anything and i will do the same.

Thanks good luck!
Click to expand...

Did you know there is a software adjustment to flip the phase? It says "inverted" on the display when it is set that way.

If that is set wrong then same audio problem as flipped wire.
 
At least in the 3Turbos, there is also a pilot injection level setting. Set your composite level to acheive proper modulation, then use the pilot level to set the proper pilot level.

Are you running RDS? If you are, check your RDS injection level. Too much RDS carrier and you will have a nasty sounding mess.
 
Hi there!

Two things come to mind...

If you have something connected to that input, check the SCA input level adjust, which is an adjustable trim pot on the rear panel. It may just need to be adjusted (turned down). I've seen instances where people use it for the RDS feed, and not realize they are horribly over-modulating the RDS, causing distortion everywhere....

Another thing I've seen is where some folks "tee" the output of the processor with the output of a subcarrier generator or RDS generator. If those devices have a lower impedance than the output of the Omnia.One, what you are describing could indeed happen.

If there are any other subcarrier devices (RDS or otherwise) connected, disconnect them, and see if the problem clears up...If it does clear up, then you will know where to look.

Regards,

-Cornelius
 
Audiophile. We did all that. Thanks for the tip.

Oldies station. We dialed in the match all over the place. Eevn put it into a different exciter - same thing.

CJ. No rds on this unit. Waiting to get it right before we add another layer.

Looking forward to getting it back and having another go at it.
 
Another test comes to mind...

If I were in your position, one of the first things I'd do is to put a BNC TEE on the output of the processor, and
connect an oscilloscope there to watch what is actually happening to the waveform coming out of the processor
and see if you see distortion there. If so, then disconnect the feed going to the transmitter (but leaving ONLY the
scope connected) and see if there is a dramatic change in the waveform. If so, then there is something wrong downstream.

If there is NO change in the waveform, the next thing to do is to turn up the composite output of the audio processor
with ONLY the scope connected. You should be able to make the waveform grow "off screen" easily. If this is the case then there
is no doubt something is wrong elsewhere.

-Cornelius

radioguy33 said:
Audiophile. We did all that. Thanks for the tip.

Oldies station. We dialed in the match all over the place. Eevn put it into a different exciter - same thing.

CJ. No rds on this unit. Waiting to get it right before we add another layer.

Looking forward to getting it back and having another go at it.
Click to expand...
 
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