GitHub/sdrtrunk
1
0
Fork 0
mirror of https://github.com/DSheirer/sdrtrunk.git synced 2026-11-13 09:07:27 -05:00
Code Issues Packages Projects Releases 2 Wiki Activity

Updates the spectral display wiki entry for version 0.3.0

Denny
2017-02-25 07:25:37 -05:00
parent 27134ddaa1
commit da71c96ec7
1 changed files with 70 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
SpectralDisplay_V0.3.0.md Normal file

@@ -0,0 +1,70 @@
**Version:** 0.3.0
Spectral Display
---
The spectral display component shows the frequency activity of the currently selected tuner and overlays
a visual representation of channel configuration contained in the playlist and listed in the
[Channels](Channels_V0.3.0) tab.
### Cursor
A cursor with frequency readout is automatically shown as you move the mouse about the spectral display window.
When zoomed in, the zoom level is also displayed below the frequency value.
### Zoom
The spectral and waterfall displays can be zoomed together using the mouse scroll wheel, or using the
right-click context menu.
When zoomed in, a small zoom window appears at the bottom of the waterfall display indicating the area
of the spectral and waterfall displays that is visible and the zoom level. You can left-click drag the
display with the mouse when zoomed in to drag the display left or right.
### Context Menus
Right-click anywhere in the spectral display to show a list of context-specific menu options.
#### Channel Menu
[Channels](Channels_V0.3.0) defined in the playlist are also displayed in the spectral display window.
Each channel exposes a context menu allowing you to start/stop the channel decoder.
#### Color Menu
The color menu allows you to change any of the global color settings used by all spectral displays.
* **Background** - background color for the spectral display
* **Channel** - channel overlay color for channels that are defined in the configuration, but are currently not
processing (decoding) or selected
* **Channel Processing** - channel overlay color for any channels that are currently processing (decoding)
* **Channel Selected** - channel overlay color for the channel that is currently selected in the
[Now Playing](NowPlaying_V0.3.0) tab.
* **Cursor** - color used for the cursor and frequency readout
* **Gradient Bottom** - bottom color for the gradient used to display the frequency spectrum
* **Gradient Top** - top color for the gradient used to display the frequency spectrum
* **Lines** - color used for lines and frequency labels
#### Display Menu
The display menu allows you to change settings associated with Discrete Fourier Transform (DFT) results
that are displayed in the spectral display.
* **Averaging** - sets the averaging window size. Averaging occurs over multiple sets of DFT results.
* **Channel** - controls display of channel overlays. Choose to display ALL, NONE, or only the channels
currently ENABLED and decoding.
* **FFT Width** - bin size used in DFT calculations, 512 - 32,768. Using a higher setting provides
increased resolution in the display, but also significantly increases CPU usage.
* **Frame Rate** - determines the number of times per second that the DFT is calculated and the spectral
display is updated.
* **Window Type** - specifies the windowing method to use prior to calculating the DFT. Windowing
minimizes signals from bleeding over into neighboring DFT bins.
* **Smoothing** - sets the smoothing filter type. Smoothing is applied across DFT bins within the
same DFT result set.
#### Zoom Menu
Changes the zoom size where 1x is no zoom and 64x is the display zoomed in 64 times.
### Changing Displayed [Tuner](Tuners_V0.3.0)
In the [Tuners](Tuners_V0.3.0) tab, click on the **Main** link for any of the tuners to
show that tuner's output in the main/primary spectral display. Click on the **New** link
to create a new spectral display window for the tuner.