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
38
Receiver Selection
Clicking on one of the two Receiver tabs located above the main frequency
display selects that particular virtual receiver. The other receiver continues
operating provided its frequency fits within the current IF spectrum bandwidth.
The tuned frequency of each receiver is displayed inside their associated tabs.
If the frequency of one of the other receivers does not fit into the current IF
spectrum bandwidth, that receiver becomes disabled and the frequency in the
tab turns red to indicate the disabled condition.
The position of both virtual receivers (or rather their DDC1 bandwidths) is
shown as dark blue areas inside the wideband spectrum scope, with the
currently selected receiver highlighted.
If a receiver is tuned away from the current IF spectrum bandwidth (and
therefore disabled), it will not be shown in the wideband spectrum.
By clicking on the receiver tabs, you can quickly alternate between receivers in
a similar way in which you would use the VFO function in a conventional
receiver, but with the additional benefit of being able to change complete
receiver settings including demodulation mode, bandwidth, notch filter, audio
filter, etc.
Mode Selection
The Mode selection buttons are located at top right of the receiver control
panel.
The individual buttons correspond to the following modes: