Just a minor thing, but I cannot find anything in ST with what I can shift the pilot-phase to compensate phase-imperfections within the RDS-carrier. In Airomate, this is possible:
Airomate-RDS with phase-shift:
StereoTool build-in RDS:
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| [USE CALIBRATION] RDS Phase Shift https://www.forums.stereotool.com/viewtopic.php?t=4707 |
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| Author: | radiofreak [ Wed Mar 06, 2013 4:01 pm ] |
| Post subject: | [USE CALIBRATION] RDS Phase Shift |
Just a minor thing, but I cannot find anything in ST with what I can shift the pilot-phase to compensate phase-imperfections within the RDS-carrier. In Airomate, this is possible: Airomate-RDS with phase-shift: StereoTool build-in RDS:
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| Author: | hvz [ Wed Mar 06, 2013 4:50 pm ] |
| Post subject: | Re: RDS Phase Shift |
There is: Go to FM sound card -> Calibration. There you can calibrate each frequency - please note that an offset at 57 kHz (RDS) means that there are (probably smaller) offsets at other frequencies as well. I want to make something better than this in the future - it causes extra latency. |
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| Author: | radiofreak [ Wed Mar 06, 2013 5:37 pm ] |
| Post subject: | Re: RDS Phase Shift |
Aah, yes - my bad! Moving the 19 kHz-phase a notch fixed it. Seems that the Trace Alpha I'm using is not as perfect as everybody claims  Or it's the exciter that scrambles the phase a bit...57 kHz and some other frequencies are greyed-out - is that on purpose? And activating LSB or USB does only bring silence to the right speaker!? |
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| Author: | Bojcha [ Wed Mar 06, 2013 6:05 pm ] |
| Post subject: | Re: RDS Phase Shift |
It's not Trace Aplpha inperfect but your MPX input at transmitter. It happens all time. Measuring only TILT in Trace Alpha gives perfect Tilt, but when i wanted to attach it to transmitter Tilt moved, just a bit. Same with rds and pilot. - Also, Pira shows "diff", and i always wandered should Pilot or RDS need to be adjusted. Or both. Quote: Activating LSB or USB does only bring silence to the right speaker!? It's not LSB and/or USB..It's just used to activate and listen silented channel while adjusting pilot phase to get as minimum sound as possible on silented channel. |
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