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
16
In an ideal situation, the length of coaxial cable to the receiver would be no
more than a few meters in order to provide low RF ground impedance at the
receiver.
To make a connection to the coaxial cable, there are a number of options.
These include using WiNRADiO antenna accessories such as the
WR-CMC-30 Common Mode Choke (see www.winradio.com/cmc30) or the
WR-LWA-0130 Long Wire Adapter (sometimes referred to as a “long wire
balun”; see www.winradio.com/lwa) which, along with their other intended
purpose, also provide a convenient ground connection stud that will allow the
connection to be made.
With any outdoor antennas, be sure to install a lightning arrestor and
disconnect the antenna (and ground it if possible) during thunderstorms.
To prevent receiver damage from static charge build-up, always ground
your antenna momentarily before connecting it to the receiver.
If it is too difficult to make ground connections near the building, it may still be
well worthwhile experimenting at a point where connections can be made
more easily. The WR-CMC-30 Common Mode Choke makes it possible to
provide several grounding points along the entire length of the antenna
feedline, in those locations where good quality grounding is available.
Where small physical size is important, magnetic field loop antennas usually
perform best on HF bands. For indoor applications, WiNRADiO also offers the
miniature AX-17C antenna (see
www.winradio.com/ax17c) which does not
require grounding.
Antennas designed for VHF/UHF/SHF bands generally do not require
grounding at all. You might inspect and consider the entire range of
WiNRADiO antennas at
www.winradio.com/antennas for various types of
applications and frequency range.
Two to one?
The WR-ACD-1800 Dual Antenna Combiner serves to connect
two separate HF and VHF/UHF antennas to a single antenna
input.
For more details on this, and other handy WiNRADiO antenna
accessories, go to
www.winradio.com/acc.