Hi Stefan
My receiver is an Elad FDM-DUO SDR with a 10 MHz GPS input.
Unfortunately SpecLab doesn't have that radio for an SDR input, so I
have to use the sound input via USB.
I could send the 1 PPS to my computer via RS 232 as well if that
helps.
73, Tony, EI8JK.
On 23/10/2016 17:51, DK7FC wrote:
Hi all,
I started to write the second part of this tutorial but when
finished i
was not happy with the result.
The first thing one can say is that you will need a very frequency
stable receiver. There is no chance without an external reference
signal. For generating wav files using SpecLab you will also have
to
use a ref signal to compensate the drift of your soundcard. Some
people
have already prepared things in the past. You can use a 1 PPS
signal
for soundcard drift compensation or a down divided 10 MHz GPS
reference
or a stereo soundcard receiving VLF MSK signals on the other
channel to
compensate the drift.
Also the SpecLab configuration depends on your receiver type.
Now i could simply make some assumptions what your equipment may
be but
this may be not a good way.
So now i think it's better that we start with one example, one (or
more) of the stations who are interested in EbNaut decodes on LF
should
describe the available system components. Then we can work
it out
what must be done.
We will need to have a stable RX frequency and a drift compensated
soundcard frequency in the end.
So who of those who are interested wants to start?
73, Stefan
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