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
65
Using the Max. gain control it is possible to limit the maximum gain that the
AGC has at its disposal, and so prevent excessive “pumping noise” between
transmissions. This is especially useful with SSB signals or when monitoring
point-to-point transmissions where the transmitter is switched on intermittently.
In such cases, if the maximum gain was not limited, the AGC might tend to
increase the maximum gain too much, which could result in unpleasant noise
bursts between transmissions. By limiting the maximum gain, such noise
bursts can be reduced or eliminated.
Manual Gain
The Manual gain mode can be enabled using the Manual button, which is
mutually exclusive with the AGC button. In this mode, the gain can be adjusted
manually to the desired value using the Gain control:
Useful notes about AGC to remember:
1. In AM, AMS, LSB, USB, ISB, DSB and CW modes, the gain setting affects
loudness. If the receiver volume appears too low (and yet the volume control is
all the way up), make sure that AGC is enabled