[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] QT waterfall sink manual intensity
From: |
Louis Brown |
Subject: |
Re: [Discuss-gnuradio] QT waterfall sink manual intensity |
Date: |
Tue, 25 Feb 2014 21:36:57 -0600 |
I'm using just the waterfall sink. The spectrum is slightly oversampled so I
see the decimation filter roll off to -170 dB and the edges, thus I'd like to
set the intensity minimum at the passband noise floor which is up at -100 dB.
The auto scale always catches -170 dB at the edges.
I'll try editing the Python script directly to access the
set_intensity_range(double min, double max) of the object, unless there is a
way to do it in GRC.
Thanks,
Lou
KD4HSO
On Feb 25, 2014, at 10:28 AM, Tom Rondeau <address@hidden> wrote:
> On Mon, Feb 24, 2014 at 10:38 PM, Louis Brown <address@hidden> wrote:
>> Is there way to manually scale the intensity of the QT waterfall sink, in
>> other words, set the dynamic range and reference level like the WX sink?
>>
>> Adjusting the time axis with the scroll wheel alters the intensity axis, but
>> the actual color values don't change.
>>
>> Thanks,
>> Lou
>> KD4HSO
>
>
> Just to make sure, are you using the QTGUI "sink" (the one with tabs
> for the different types of plots) or the "waterfall sink" (with /just/
> the waterfall). If the former, there should be two bars for the upper
> and lower intensities that will affect the colors.
>
> If using the waterfall plot directly, we haven't instrumented the
> min/max from the gui directly (to avoid clutter). However, the object
> does export the set_intensity_range(double min, double max) that you
> can use to directly control these.
>
> Alternatively, with this plot, if you middle-click on the mouse, the
> drop-down menu offers an Auto Scale feature that will adjust the
> dynamic range based on the min/max values in the current plot. I've
> found that to be the most useful way to control the intensity.
>
> Tom