"The SV mod" - UI improvements by SV1SGK and SV8ARJ. W.I.P.
here.Download the latest test build (v0.16_02-OCT-18) from
- Please report bugs/comments before our pull request. The rtlsdr.dll and rtlpower.dll included (in the lib folder) are from previous version of spektrum (v1.0.2). Latest versions (also included but renamed to ****.dll-latest) were giving us a grey screen (not working). YMMV.
- If you get an error after selecting device see this.
To make an excellent utility easy to use. 73's from Nick and George.
Progress so far
- Added: 2 Cursors for Frequency axis.
- Added: 2 Cursors for Amplitude axis.
- Added: Absolute and differential measurements with cursors.
- Added: Zoom functionality of the cursors's defined area (gain + frequency).
- Added: Mouse Wheel Gain limits adjustment on graph (Top area for upper, Bottom area for lower limit).
- Added: Mouse Wheel Frequency limits adjustment on graph (left area for lower frequency, right for upper).
- Added: Mouse Wheel in the centrer of the graph performs symetric zoom in/out.
- Added: View/settings store/recall (elementary "back" operation, nice for quick zoomed in graph inspection).
- Added: Right click positions primary cursors.
- Added: Right Double Click positions primary cursors and moves secondary out of the way.
- Added: Right Click and Drag defines area using primary and secondary cursors, also interactive Delta measurements.
- Added: Left Double Click zooms area defined by cursors (Amplitude + frequency).
- Added: Left Mouse Click and Drag on a cursor moves the cursor.
- Added: Middle (mouse wheel) Double Click resets full scale for Amplitude and Frequency.
- Added: Middle (mouse wheel) Click and Drag, moves the graph recalculating limits accordingly.
- Added: Reset buttons to Min/Max range next to Start and Stop frequency text boxes.
- Modified: Cursors on/off now operate on all 4 cursors.
- Added: ZOOM and BACK buttons.
- Added: Display of frequency, Amplitude and differences for all cursors.
- Modified: Button layout.
- Fixed: Save/Reload settings on exit/start.
- Added: Filled graph option (line or area).
- Added: VSWR calculation display for the antenna tunning guys (delta db from curosrs to VSWR).
- Added: Reference graph save / display.
- Added: Video averaging, useful on fast refresh (zoomed in).
- Added: Minimum, Maximum hold (persistent display).
- Added: Median value display (middle value between Max and Min).
- Added: IF frequency basic support (only Upper band displays left to right in ascending order).
- Added: Average graph can be saved as reference (if active when "save reference" is clicked).
- Added: Vertical offset for reference graph (controled from knob).
- Added: Quick help reference screen (mouse operation).
- Modified: RF gain is now a rotary knob plus 3 buttons for 1/3, 1/2 and 2/3 presets.
|Rearranged User interface:||Area/Line option|
|Mouse wheel zoom from middle of graph:||Mouse wheel close to graph edges adjusts limits|
|The zoom area and measurements with cursors:||Zoomed in area|
|Drag graph with middle mouse button:||Area of interest centered|
|Reference save/display:||Averaging (video)|
|Min Max hold & Median:||VHF band scan with Max hold|
|Basic support for IF.||Average stored as reference and shifted up.|
Original readme starts here:
Spektrum is spectrum analyzer software for use with rtl-sdr.
Biggest advantage is that it can do sweeps across large frequency span.
User interface part is written in Processing
|FM frequency band||433 MHz antenna measurement|
Display Sample Dots
Grab the latest release for your OS and unpack it somewhere.
Connect and configure your rtl-sdr stick ( follow this guide for windows).
Launch the software.
If you are running windows version and only thing you see is grey screen, you need to install Visual C++ Redistributable for Visual Studio 2012 - Get them from http://www.microsoft.com/en-us/download/details.aspx?id=30679
Usage is fairly simple
- Tweak parameters like frequency range, scale, tuner gain or offset tuning to suite your needs.
- Base display is average for each point, turn "min/max" to also see minimums and maximums for every displayed point.
Relative mode allows you to "zero" the measurement and is useful for measurements with noise constant sources
- Connect your noise source
- Set desired frequency range
- Click "Relative mode"
- Wait couple of sweeps - it will do running average of all collected data
- Click "Set relative" to set captured spectrum as reference. You should now see fairly straight line around 0dB
- Connect antenna or filter and tweak gain so you see what is desired
Two libraries is needed to run the code
- rtl-sdr rtlpower - special branch, where rtlpower is separated into library, so we don't need to run the binary rtlpower.
- java bridge - processing library to interface with rtlpower
The rtl-sdr branch is located here: https://github.com/pavels/rtl-sdr
The processing library is here https://github.com/pavels/processing-rtlspektum-lib
- Processing development environment https://processing.org/
- rtlspektrum processing library https://github.com/pavels/processing-rtlspektum-lib/releases (unpack latest rtlspektrum.zip into your processing libraries folder)
What is missing?
- Bugfixes - yep, there is most certainly bugs
- Cursors - proper cursors for measurement would be nice
- Better UX - the UI is pile of controls, no design, nothing
- Better README - this one is a bit crude
- Check out the latest master to make sure the feature hasn't been implemented or the bug hasn't been fixed yet.
- Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it.
- Fork the project.
- Start a feature/bugfix branch.
- Commit and push until you are happy with your contribution.
Copyright (c) 2015 Pavel Šorejs. See LICENSE for further details.