Stereo encoder - noise

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djhubbalubba
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Stereo encoder - noise

Post by djhubbalubba »

Hi,
I have a SE5000 DSP+ stereo encoder
Suddenly, I have been noise in the background, it is only when I have stereo signal, when I put over to mono, it is gone,
What is the problem?

It has worked perfectly before,
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pcs
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Post by pcs »

Maybe your output power dropped. Stereo signal needs more signal
for same reception quality.
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Post by djhubbalubba »

Power from transmitter?
I have 40 watt before now I have 100 watt

I have record from the reciver, you can hear here so you understand what I mean, it's a little difficult for me and explain in English.

Link to soundfile: http://www.dump.no/files/0f70b7a9230b/noise_record.mp3
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pcs
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Post by pcs »

Possibly too high RDS carrier?
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Marko - PCS Electronics
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http://www.pcs-electronics.com
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Post by djhubbalubba »

No, when I take out the RDS board it is still there.
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Post by pcs »

What changed in the system when this happened?
Best regards,
Marko - PCS Electronics
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Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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Post by djhubbalubba »

Also when the rds encoder is disconected the noise still are there. maybe it is the new amp who disturb. Im gonna check it out when im back from work.
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Post by pcs »

Yes, check whatever changed.
Try to see if the noise is coming through power supply, for example, or fans etc.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
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Post by djhubbalubba »

The ''stereo noise'' stop when I turn down the FM amp.

The amplifier and stereoencoder are located in different places.
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Post by pcs »

Maybe your receiver is overloaded? Try with a receiver at your friends house.

Or somehow you have RF coming back.
Best regards,
Marko - PCS Electronics
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http://www.pcs-electronics.com
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Post by djhubbalubba »

No, I don't think that's the problem, the noise are still there when im 3km away from where the transmitter are located...
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Post by pcs »

Ok, must be something about the amplifier perhaps. Can you send me some photos of your setup? You have my email I think.
Best regards,
Marko - PCS Electronics
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Turn your PC into a FM radio station!
http://www.pcs-electronics.com
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djhubbalubba
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Post by djhubbalubba »

Yes.
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Post by djhubbalubba »

I have a little fun things and tell and with this end the conversation.

I disconnected all the equipment and connected it up again, so does everything perfect again as it was before.
Transmit now with 125W perfect stereo and RDS :)
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