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 Post subject: Re: RDS Level Too High
PostPosted: Wed Mar 12, 2025 12:36 pm 
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Joined: Wed Oct 13, 2021 3:30 pm
Posts: 14
Location: Ireland
Quote:
Hi,

I did some bench tests...

La flatness della scheda audio è abbastanza buona 30-77800 hz @75khz +/- 1khz (di seguito link screenshoot)
il problema di questa scheda è l'adattamento di impedenza vs gli apparati collegati.... se effettuo le misure MPX ,con analizzatore di modulazione o oscilloscopio, per avere 2.2Vpp in uscita, devo impostare un volore di -2.15 db su ST , se lo collego al trasmettitore dovrò portarlo a -3.15 db, quindi l'uscita può variare in base all'apparato collegato alla UMC202HD.
https://www.mediafire.com/folder/3qqkbj ... elco+exc19

I also attach a test carried out with the DEVA BANDSCANNER2, do not use it to perform the TILT 30-60 Hz calibration, it suffers from Dc Coupling....terrible device, I also wrote to deva they did not even answer me.....
https://www.mediafire.com/file/ahb433if ... 2.pdf/file

Best
Luca
Thanks for these numbers; it gives me confidence that it can be done with a budget soundcard like the UMC! I'll let you know what we find later. :)


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