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
44
FSK Mode
The FSK (Frequency Shift Keying) mode performs in a similar manner to the
CW mode, in that all of the parameters associated with CW are also available
with FSK, but each with its own independent setting. Of particular note is the
tone frequency: With CW, or Morse transmission, this is typically set to 800 Hz
to provide a comfortable sound for the listener. However, with FSK
transmissions, because of the need to make the frequency readout of the main
receiver display correspond to the published frequency allocation tables, the
tone frequency must be different. The FSK tone frequency is traditionally set to
1.9 kHz due to the typical characteristics of modems relying on transmitters
operating in a suppressed carrier mode. However, any offset may be used,
and the values are automatically saved.
UDM Mode
The UDM (User Definable Mode) makes it possible to define any set of
parameters for a special application. All settings, including the actual
demodulation mode, may be selected and saved. For instance a user may
wish to have a special USB mode with a very wide demodulation bandwidth,
and unusual audio filter settings, and these may all be catered for, saved, and
be available for quick and easy recall.
Note that as there are two receivers in the Excelsior, each receiver can
have its mode set independently. The current mode setting for each
receiver will be remembered upon the program exit.
Function Tabs
The Function tabs are located under the mode buttons:
The function tabs contain numerous essential and ancillary functions
dedicated to various aspects of the receiver’s operation.