Message-ID: <4D71533C.9020509@freenet.de>
Date: Fri, 04 Mar 2011 22:01:48 +0100
From: wolf_dl4yhf <dl4yhf@freenet.de>
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References: <4D713F80.26891.6BB935@mike.dennison.ntlworld.com>
In-Reply-To: <4D713F80.26891.6BB935@mike.dennison.ntlworld.com>
Subject: Re: LF: SpecLab advice
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Hello Mike,

As Gary correctly explained, the two split parts of the spectrogram can=20
cover different frequency ranges (you can move the scales around by=20
pulling them with the mouse), but they will run at the same scroll rate=20
(and FFT resolution). To activate split-scale mode, right click into the=
=20
frequency scale and select "split scale". To change the displayed=20
frequency range, pull the scale with the mouse, zoom in & out, etc.

For two frequency ranges which cannot be covered by a single FFT (for=20
example, the 6 kHz band and the 9 kHz band with =B5Hz resolution), you=20
need the dual channel mode. This means different center frequencies for=20
the complex FFTs (but still the same size and scroll rate,=20
unfortunately). For this mode, two input channels for the spectrum=20
analyser must be activated: Select "Components" in the main menu,=20
"Circuit Window". In the lower part of the block diagram is the spectrum=
=20
analyser with two inputs. Click on the right input box in the circuit,=20
and (for simplicity) select the same source as for the left input. This=20
will activate the 2nd FFT channel, and also a 2nd section of the=20
waterfall / spectrum display. The center frequency for the FFT can be=20
modified under "Options".."FFT settings".

To run multiple displays at different speeds, and different FFT=20
resolutions, launch the program two or more times. Each running instance=
=20
will use its own, individual configuration (save in its own file) so=20
they can be launched from the same directory.
The multistrip mode was designed to display "long CW messages" (etc) in=20
a narrow frequency range only.

Cheers,
    Wolf .


Am 04.03.2011 20:37, schrieb Mike Dennison:
> I have been trying to produce a multiple display on Spectrum Lab like
> the grabbers do, but I can't find how to achieve it. I can find a
> reference in the Help file to "multistrip" and can split my screen,
> but each strip is the same as the top one and cannot be altered. The
> Help file talks about 'new' displays being added at the top, but I
> can't find how to add a 'new' display.
>
> Ideally I wan't to combine a wide, fast display and one or more
> narrower slow displays.
>
> Has anyone else been as baffled as me and can explain it in simple
> terms?
>
> Mike, G3XDV
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
>
>