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
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All shortcuts can be user defined. If there is a conflict in the definition table (the
same keystrokes are specified for more than one function), this will be
highlighted in red. The Default button restores the factory defaults and the
Enable button can be used to enable or disable all shortcuts.
VSC Set-up
The Virtual Sound Card (VSC) is a software option designed to transfer
digitized audio signal streams from WiNRADiO receivers directly to other
applications. For more detailed description please refer to the chapter Virtual
Sound Card (under Function Tabs, the Audio tab).
This function makes it possible to set sampling rates for both the VSC audio
and IF outputs independently, to match the requirements of the target
application.
The VSC audio data is always 16 bit mono, the IF data is 16 bit stereo (each of
the I and Q components uses its own channel). The buffer size can be
adjusted to control latency, while the buffers count should be set to an
optimum value to avoid drop outs in data due to unequal sampling rates
between the applications.
Audio Buffering
The audio signal resulting from the receiver filtering and demodulation process
is sent to Windows multimedia output device, i.e. in most cases the PC sound
card. Prior to this, the audio data are buffered in order to avoid potential drop-
outs due to other background processes taking place on the PC, which may
cause irregular data rate.