[time-nuts] Anybody who can record last Loran-C transmissions ?

Bill Byrom time at radio.sent.com
Sat Dec 19 23:05:55 EST 2015


The Tektronix RSA306 9 kHz - 6.2 GHz RF signal analyzer samples the IF
at 112 MS/s (14 bit A/D), so it streams data over USB 3 at 224 MB/sec. A
PC with an I7 (or even a good I5) and a modern solid state hard drive
can keep up with this streaming data and store hundreds of GB of
contiguous streaming samples. These can be read back with the SignalVu-
PC application (base version is free, but option is required for
playback) and analyzed as I/Q data (contiguous spectrograms over up to 1
second, export to Matlab, etc.).

Unfortunately, I'm in Texas so I can't receive these transmissions from
Europe. ;)
--
Bill Byrom N5BB
 
On Sat, Dec 19, 2015, at 05:10 PM, Lizeth Norman wrote:
> That's what I said. 61.44MS/s. This thing is a fire hose.
> Saturate a usb 3.1 without much problem.
> Gotta love computing!
>  
> On Sat, Dec 19, 2015 at 5:01 PM, Poul-Henning Kamp <phk at phk.freebsd.dk>
> wrote:
>> --------
>> In message <5675AC3C.8020204 at aei.ca>, Graham writes:
>>  
>>> Would you be able to record what you want via the online web SDR at the
>>> Twente University?
>>  
>> Not really.  That would only give a water-fall.
>>  
>> What I think should be preserved is the actual raw, unadultered signal on air.
>>  
>>  
>> --
>> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
>> phk at FreeBSD.ORG         | TCP/IP since RFC 956
>> FreeBSD committer       | BSD since 4.3-tahoe
>> Never attribute to malice what can adequately be explained by incompetence.
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