From: "Mike Dennison" <mike.dennison@ntlworld.com>
To: rsgb_lf_group@blacksheep.org
Date: Sun, 06 Mar 2011 10:00:44 -0000
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Subject: Re: LF: SpecLab advice
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Thanks to all for the advice on SpecLab.=20

73 de Mike
=3D=3D=3D=3D=3D=3D=3D=3D

> As Gary correctly explained, the two split parts of the spectrogram
> can cover different frequency ranges (you can move the scales around
> by pulling them with the mouse), but they will run at the same scroll
> rate (and FFT resolution). To activate split-scale mode, right click
> into the frequency scale and select "split scale". To change the
> displayed frequency range, pull the scale with the mouse, zoom in &
> out, etc.
>=20
> For two frequency ranges which cannot be covered by a single FFT (for
> example, the 6 kHz band and the 9 kHz band with =B5Hz resolution), you
> need the dual channel mode. This means different center frequencies
> for the complex FFTs (but still the same size and scroll rate,
> unfortunately). For this mode, two input channels for the spectrum
> analyser must be activated: Select "Components" in the main menu,
> "Circuit Window". In the lower part of the block diagram is the
> spectrum analyser with two inputs. Click on the right input box in the
> circuit, and (for simplicity) select the same source as for the left
> input. This will activate the 2nd FFT channel, and also a 2nd section
> of the waterfall / spectrum display. The center frequency for the FFT
> can be modified under "Options".."FFT settings".
>=20
> To run multiple displays at different speeds, and different FFT=20
> resolutions, launch the program two or more times. Each running
> instance will use its own, individual configuration (save in its own
> file) so they can be launched from the same directory. The multistrip
> mode was designed to display "long CW messages" (etc) in a narrow
> frequency range only.
>=20
> Cheers,
>     Wolf .
>=20
>=20
> 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
> >
> >
> >
>=20
>=20