User's Manual
Table Of Contents
- Table of Contents
- Introduction
- The Hardware
- Installation
- Getting Started
- Inside the Excelsior
- Resizing the Application Window
- Drop-Down Menu Controls
- Tuning the Excelsior
- Receiver Selection
- Mode Selection
- Function Tabs
- Spectrum Scopes
- Recording Functions
- Attenuator
- Preamplifier
- S-meter
- Top Menu Bar
- File
- Options
- Auto-mute RX not in focus
- Enable second RX
- Filter Length
- Front Panel LED
- Display Offset
- Time
- Keyboard Shortcuts
- VSC Set-up
- Audio Buffering
- AMS Capture Range
- Audio Output
- Show Measurements
- Show Data Rates
- Of particular interest to many users will be the CPU load (excessive CPU load may cause sluggish behaviour or freezing of the computer), and Audio latency. Apart from DDC bandwidth, CPU load may be minimized by reducing the Demodulator filter length (...
- Note: When measuring sensitivity using SINAD, it is very important that the Audio Filter is enabled and the cut-off frequencies (and for FM measurements, also the de-emphasis) are set according to the specified test conditions. Proper audio filtering ...
- Show Waterfall Timestamps
- Calibration
- Hand-Off Receiver
- Color scheme
- Restore factory defaults
- Memory
- Scheduler
- Scanner
- Logger
- Plugins
- Power Switch
- Date and Time Display
- Appendix A – SDR and DDC Primer
- Appendix B – Troubleshooting
- Appendix C – USB Interface Diagnostics
- Appendix D – Dealing with Interference
- Appendix E – G39DDCi PCIe Card Connections
- Appendix F – Waterfall Spectrum Palettes
- Appendix G – Recording File Formats
- Appendix H – Compliance Declarations
- Appendix I – Safety Disposal
WiNRADiO G39DDC User’s Guide
121
Appendix F – Waterfall Spectrum Palettes
The Waterfall spectrum uses color palettes, selectable using the Palette
control:
The color palettes reside in ordinary text files with an extension “.pal”, located
in the application installation folder, i.e. typically
C:/Program files/WiNRADiO/G39DDC/Defs.
The existing files are named Default.pal, Blue.pal, DeepBlue.pal, Gray.pal,
Magenta.pal, Rainbow.pal, Sepia.pal and Yellow.pal.
You can create your own additional palettes quite easily.
A palette file consists of 256 lines. The top line corresponds to the maximum
signal strength (max_SS) displayed by the waterfall, the bottom line
corresponds to the minimum signal strength (min_SS).
Each line contains a set of decimal RGB values separated by spaces (0 0 0
represents black; 255 255 255 is white). The incoming signal strength values
are mapped to this color space as follows:
If the attenuator is off, the minimum signal level is -150 dBm, the maximum
level is 0 dBm. If the attenuator is on, the attenuation value is added to these
figures (for example, for 10 dB attenuation, the minimum displayed signal level
will be -140 dBm and the maximum level will be +10 dBm).
The Color index, i.e. the sequential number of the corresponding line in the
palette related to a particular input signal strength (SS) will be calculated using
a linear interpolation formula:
Color_index = 255 * (SS - min_SS) / (max_SS - min_SS)
(All signal strength values are in dBm.)