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
37
The Step control selects the stepping size. The following convenient step
sizes are available: 1 Hz, 10 Hz, 100 Hz, 1 kHz, 3.125 kHz, 5 kHz, 6.25 kHz,
10 kHz, 12.5 kHz, 25 kHz, 50 kHz, 100 kHz. The left
and right arrow
buttons perform the actual stepping.
Frequency Display Offset
It is possible to connect the Excelsior to a down-converter to receive
frequencies that are normally beyond the Excelsior’s frequency range. When
this is done, it is convenient to see the actual received frequency rather than
having to manually transpose the displayed frequency to the down-converter’s
input signal.
For this purpose, there is an option to add a user-defined offset to the
displayed frequency. This option is called Display offset and is located under
the Options top menu bar:
As usual, you can enter the display offset in Hz, kHz or MHz by terminating the
entered value with either h, k or m, respectively, should you need to change
the displayed frequency unit.
An option to invert the spectrum is provided for situations where the spectrum
is inverted by the down-converter.
Did you know?
The USS Excelsior (NX-2000) was a starship of the Star Trek science-fiction series. It
was the first starship of her class, implementing the breakthrough technology of
transwarp propulsion – to boldly go where no man has gone before.