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
115
Problem Solution
I can hear the
audio and tune the
receiver, but the
sound is distorted.
Make sure that AGC under the Gain tab is enabled
and set to medium speed. Try to adjust the Gain
parameter under the Audio tab (excessive audio gain
can cause distortion).
If the S-meter shows the ADC CLP message, try to
reduce the signal level using the Attenuator (this is
only applicable on HF bands).
I can hear the
audio and tune the
receiver, but the
volume is too low,
even if I adjust the
volume control to
maximum.
Presuming the volume is already set to the maximum
level under the Audio tab, try to adjust the Wave and
Master volume also in the sound card control panel,
or on the amplified speakers you are using.
Make sure that AGC under the Gain tab is enabled.
Try to adjust the Gain parameter under the Audio tab
(excessive audio gain can cause distortion).
I can hear the
audio and tune the
receiver, but the
software is very
sluggish,
sometimes it may
even freeze.
Close all other programs to reduce the CPU load.
Go to Options top bar menu and select Filter Length.
This function shows the CPU load. This value should
not go over 30%. If it does, this may indicate
insufficient PC resources. You might need to decrease
the demodulator filter length (although values under
200 may not provide adequate selectivity) and/or limit
the maximum DDC1 bandwidth you can use (the wider
the DDC1 bandwidth the greater burden on the CPU
resources). You can also disable the secondary
receiver (uncheck Enable second RX under Options
menu), which should more than halve the CPU load.
For best performance, modern PCs should be used,
preferably with quad core or higher.