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Stereo encoder - noise
Posted: Sun Sep 07, 2008 2:57 pm
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,
Posted: Sun Sep 07, 2008 4:43 pm
by pcs
Maybe your output power dropped. Stereo signal needs more signal
for same reception quality.
Posted: Sun Sep 07, 2008 5:26 pm
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
Posted: Sun Sep 07, 2008 5:45 pm
by pcs
Possibly too high RDS carrier?
Posted: Sun Sep 07, 2008 6:02 pm
by djhubbalubba
No, when I take out the RDS board it is still there.
Posted: Mon Sep 08, 2008 1:40 am
by pcs
What changed in the system when this happened?
Posted: Mon Sep 08, 2008 10:40 am
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.
Posted: Mon Sep 08, 2008 11:24 am
by pcs
Yes, check whatever changed.
Try to see if the noise is coming through power supply, for example, or fans etc.
Posted: Mon Sep 08, 2008 3:32 pm
by djhubbalubba
The ''stereo noise'' stop when I turn down the FM amp.
The amplifier and stereoencoder are located in different places.
Posted: Mon Sep 08, 2008 4:36 pm
by pcs
Maybe your receiver is overloaded? Try with a receiver at your friends house.
Or somehow you have RF coming back.
Posted: Wed Sep 10, 2008 7:47 pm
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...
Posted: Wed Sep 10, 2008 10:25 pm
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.
Posted: Thu Sep 11, 2008 10:24 am
by djhubbalubba
Yes.
Posted: Tue Oct 07, 2008 4:44 pm
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
