A Pathway to Amateur and Antique Radio related content

Exploring Software Defined Radio (SDR)
(Page Always Under Construction. Last edit 12-13-08)


In my explorations of SDR (Software Defined Radio) I have come across the "PSK REPORTER INFO" site created by Philip Gladstone. By following this URL you will be able to observe amateur radio station signals being received at my location in Okemos, Michigan in near real time (Plotting of data occurs every five minutes). The stations call letters, frequency and grid square location are available and plotted on a Yahoo map along with the calculated distance between this location and the origin of the received signal.

The receiver being used at my location is a Softrock Version 8.3, software defined radio kit provided by Tony Parks of Springport, Indiana. I have it connected to a G5RV multi-band antenna elevated 28 feet. The broad side orientation is East and West. The software to control the radio and collect the data is "CW Skimmer" authored by Alex Shovkoplyas, VE3NEA. This program captures all CW signals within a 96 KHz bandwidth, decodes the CW signal to obtain the call letters of stations currently heard within that bandwidth at this location (variable depending on what amateur band and segment I have chosen). The data is then sent via telnet to the PSK REPORTER INFO server for publication to the map mentioned above.

This link will show you the information provided from my location in central, lower, Michigan, however, you will see that you may check the data from other monitoring stations with similar arrangements from various points around the globe. You are invited to take a few moments to explore and enjoy this means of checking propagation or to locate your rare un-worked DX.    Come back often...

NB: Please do not use this service as a frequency check. My exact frequency calibration may not be accurate and if the SDR receiver is not correctly balanced it may show the same signal at two frequencies one of which is a mirror image of the correct one and can make that signal appear to be outside of the band limits. Thanks.