Table of Contents
Introduction – page 1
-Playback settings – page 2
-Recording settings – page 3
Testing and troubleshooting – page 4
Recording with Audacity – page 5
-Record all received and transmitted audio
Sound card clock calibration – page 6
This document will demonstrate basic setup of a radio interface device in the Windows Sound Control Panel to use with Ham Radio Sound Card digital modes. Programs include: Ham Radio Deluxe DM780, MMSSTV, Fldigi, wsjtx, FreeDV, Easypal. In addition, it will demonstrate how to record digital transmissions and play them back.
This is written with the beginner in mind and many concepts outlined step-by-step. It will provide direction for further experimentation on your own or on the net and direction for troubleshooting.
The SignaLink USB was used but these instructions can be adopted for similar devices. Those using other methods may find the settings and techniques useful.
SignaLink and many other external interfaces have external volume controls. Set these controls at half to start. Adjust these controls first as they are the easiest to adjust and fine tune while operating. If a situation occurs where you have too much/little audio with the volume controls set low/high, then adjust the Windows audio levels second.
It is important to point out:
- Plugging the same device into a different USB port will be recognized as a new device by the system. This means the audio settings will need to be re-configured. In addition, the audio device settings in the digital mode program may need to be re-configured as well.
- The process of setting audio levels is not exact. Each system is different, drivers are programmed differently, hardware interacts differently with the operating system. It will take some time to fine tune audio levels.
Prepared for The Lake Erie Amateur Radio Association’s Digital Net (http://www.leara.org/).
Windows 7 – 64 bit
Still having trouble after using this tutorial? Read through the product manual and support documentation. Below are links for popular devices.
Specific instructions can be found online typically by searching: [name of application] [radio interface device]. Example: Fldigi SignaLink USB.
General support, operating tips, manuals, and modifications (all models): http://www.tigertronics.com/sl_suprt.htm
SL USB troubleshooting: http://www.tigertronics.com/slusbts.htm
Knowledge base: http://www.westmountainradio.com/knowledge_base.php
Drivers and manuals: http://www.westmountainradio.com/content.php?page=wmr-downloads