Navtex settings

AIS, Navtex, DSC
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Bron
Posts: 2
Joined: Wed May 08, 2024 2:44 pm

Navtex settings

Post by Bron »

I'm new to using SDRangel but I've been unable to receive any Navtex transmissions.
Below is a screenshot of my settings - if anyone can point out where the problem might be I'd really appreciate it.
Thanks!
Screenshot 2024-05-08 at 11.45.35.jpg
Screenshot 2024-05-08 at 11.45.35.jpg (608.26 KiB) Viewed 456 times
srcejon
Posts: 323
Joined: Thu Jan 19, 2023 2:30 pm
Location: London
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Re: Navtex settings

Post by srcejon »

Navtex transmissions are very narrow, so you should probably lower your sample rate to 1MS/a and then put Dec to 64. This will give you a chance of seeing it in the spectrum.

You don't want to tune the device to 518kHz exactly and have DC filtering on - as that will filter the signal at 518kHz. Set device frequency a couple of kHz below and set the delta freq in the demod window so the demod is at 518kHz.
Bron
Posts: 2
Joined: Wed May 08, 2024 2:44 pm

Re: Navtex settings

Post by Bron »

Thanks for much for the quick reply. I'll change those settings and give that a try.
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