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
100
Show Waterfall Timestamps
Invoking this option makes the waterfall spectrum display show time stamps,
making it possible to relate spectrum events to absolute time:
Calibration
Since the Excelsior uses an accurate and stable temperature compensated
crystal oscillator with 0.5 ppm (parts per million) tuning stability, there is no real
need for calibration for most practical purposes. However, for the most
demanding user, a calibration facility still remains available:
Such calibration can be done either manually, by entering a correction factor
for the reference oscillator directly, or using automatic calibration against a
known reference signal.
To calibrate to a peak, simply tune the receiver to a known reference
frequency (presuming a reasonably strong and steady signal). The frequency
difference between the peak and the receiver’s tuned frequency will be shown
as Peak offset.
To calibrate the receiver to the peak frequency, click on Calibrate to peak. If
successful, the peak offset will show as zero. Press OK to complete the
process.