Quote:
you have not understood anything ,no matter
solved by AIROMATE
good week
Now I'm really interested in what's going on here...
Theoretically, the signal from your transmitter should NOT be weaker if you add stereo or RDS data.
But I have another idea that might explain what you're seeing. If you're using Stereo Tool, the output signal is (depending on the processing settings) VERY loud. Now if there's a problem with the transmitter volume (broadcasting too loud), it will constantly be too loud. And MAYBE your radio is better able to handle that if the signal is very strong. Note sure about this though...
If you're still interested in testing, could you try what happens if you use Stereo Tool using NO processing at all? (Except pre-emphasis and the final limiter to keep the pre-emphasized signal within limits, and of course using the stereo + RDS encoders.)
Potential causes:
- Stereo Tool contains a stereo widener, and the output signal is very strong - if your sound card plays high frequencies louder than low frequencies (the stereo signal is encoded at very high frequencies), that might cause issues (and explain why there's no problem when you're not using Stereo+RDS).
- Some sound cards (especially those made by Creative/SoundBlaster, yes that includes the X-Fi cards) have high frequency harmonics and huge phase shifts. That might also cause all kinds of problems, which might get worse when the reception gets weaker.
If your signal weakens and there are some stations at neighboring frequencies, and your signal is too loud, the receiver may not be able to "know" which signal it needs to play if your signal enters the area allocated to the other station. Especially if the sound card (or the transmitter) causes peaks that should not be present in the signal, this can happen - and it will happen far more often if you're using a lot of processing to make the signal louder.