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From: | Vitt Benv |
Subject: | Re: [Discuss-gnuradio] The PLL for the burst signal |
Date: | Mon, 24 Apr 2017 18:27:15 +0200 |
Hi,
Really thank you all.
I was read the specification of EPIRB and researched something about that,
but it’s seems some error about that. I will attach the GRC what I tried.
> So, a PSK that can only take values of +1.1 and -1.1, relative to the
> "idle" carrier. Bit rate is 400b/s, so that makes it a 800 S/s PSK
> symbol rate (Manchester-encoding happening in between).
Marcus, thanks for your advice.
I set the baud rate for 400 bits/sec.,
but does it related about the PLL or Time Synchronization?
I thought the Manchester decode is the part of line code
and I should take that later?
> About frequencies pay attention that there are more than a single (406.025
> MHz)
> frequency.
> In my direct experience there's also 406.028 / 406.039 MHZ in use. So also
> tuning
> has to be on the right frequency.
> Current NTIA spectrum documents are here:
> https://www.ntia.doc.gov/page/federal-government-spectrum-us e-reports-225mhz-6ghz
Thanks a lot, Vitt and Ron.
In fact, I just testing the file was recoded with my PC,
so I guess it’s not a trouble now, but still thanks.
Here is the GRC I tested below, it refer the GRC from here
<http://gnuradio.4.n7.nabble.com/Tutorial-on-BPSK-bursts-td5 > by8484.html
Andy Walls.
Again, Thanks and appreciated for any help.
Thanks,
Vicfield.
512K_test_.grc <http://gnuradio.4.n7.nabble.com/file/n63620/512K_test_.grc >
BTW, how can I upload the file like "Download Attachment"?
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