jvankatwijk / panoramaviewer Goto Github PK

Sometimes one wants to get a glimpse of a whole band, no details, just an overview. The above picture shows - as an example - what one gets with a simple whip in the range 60 .. 1100 MHz. Other tools focus on details, this one on the global view

The picture clearly shows the bands up to 240 Mhz the FM and DAB signals, the various digital TV signals around 500 Mhz, telephone in the 8 and 900 MHz bands.

In the second picture one gets a closer look at both the FM band and the DAB signals (again, reception is just with a simple whip).

panoramaViewer is - still work in progress - a simple tool to show an arbitrary wide segment of the spectrum - provided the frequencies are supported by the input device.

The controls for the panoramaViewer are located at the left side of the widget.

• the vertical range of the scope can be set - in steps of 5 dB. The left spinbox defines the width, the right spinbox defines the baseline. Settings are immediate.

• a center frequency and a band width for the scan can be set. Of course, specfication is in Mhz

• since the spectrum shown is built up from a(large) number of segments, an overlap can be specified. The basic idea is to overlap the last part of a segment with the begin of the next segment. The number - default 125 - gives the fraction (range 1 .. 1000) to be used as overlap area.

• the averager determines the amount of averaging applied on fft output, see the tooltip for details.

• a device can be selected. The panoramaViewer supports the SDRplay devices. A selection can be made for the support library, either 2.13 or 3.07. One a device is selected, selection will be fixed for the duration of the program execution.

• the program can be started with the (re)start button. As the name suggests, the button can be used to restart the program as well. A restart is useful when changing the parameters. Note that changing the setting of the minimum or the maximum frequency has no effect on the current run of the program. It will have effect after a restart.

• Touching a location in the specturm window with the mouse and clicking with the right mouse button will cause the frequency to be shown on the top of the left part of the widget.

• the scaler detemines the length of the Y-axis of the spectrum, see the tooltip for details

A windows installer is available

To construct the spectrumviewer adapt the ".pro" file to your needs For the devices included (by uncommenting the appropriate lines in the ".pro" file) you need to install the appropriate libraries

The program is configured to handle the SDRplay (both with the 2.13 and the 3.07 support library).