I ran SpecLab last night using (almost) the settings needed for 29kHz
OPDS, and had some pleasing results. The attached pictures both show
a good trace on Bob's frequency.:
capt07-rev.jpg
Shows the situation at 0900, with the green line showing the night's
peak signal. Amplitude scale is 5dB/div. The day/night noise
diference can clearly be seen.
capt1403070931.jpg
This is a zoomed in view with the amplitude scale at 2dB/div and the
SpecLab cursor moved so that the yellow line shows the instantaneous
situation at 0400UTC. Bob's signal is some 5dB above noise in a
119uHz FFT. Looking at the spectrogram itself, it is noticeable that
this signal is the sharpest despite the Op keying.
One surprising thing is that, despite SpecLab being locked to GQD,
there is still a small error (0.012Hz) in the displayed frequency. Is
this normal? I can easily tweak the displayed frequency if needed.
I hope to set up OPDS today.
Mike, G3XDV
==========
> Congrats Markus! We will try again tonight-many nights on LF didn't
> get any detections! Bob
>
> From: [email protected]
> To: [email protected]
> Date: Fri, 7 Mar 2014 09:03:36 +0100
> Subject: Re: LF: New OPERA OP/OPDS 2H tonight on 27.945 Dial Freq...
>
>
>
>
>
>
>
>
> Just one detection here, but that makes it worth
> the effort:
>
> 2014-03-07 06:52:02 WH1XBA 6448km
> 29499.000Hz 1mHz -52.9dBOp 100% 15.3dB
>
> Out of the last four nights, this was the one
> with the highest noise. The carrier was visible since about 0:30, but
> the detection occured only in the morning when the noise went down
> before the signal did. Unlike Paul in Todmorden, I don't have a
> steerable pair of loops, so only the blanker to combat the statics.
>
> Bob, thanks for this signal!
>
> Best 73,
> Markus (DF6NM)
>
>
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