Sound card connections

Once you have your PC setup and running CentOS, the next task is to setup the inputs to the soundcard. Typically, the GPS 1PPS signal connects to the first input channel and the VLF signals can be connected to the second and subsequent input channels of the computer sound card.

It is important that the GPS 1PPS signal does not overload the soundcard input. The ideal level for the 1PPS pulse is around 50 % of the full scale input level. You may need to attenuate the 1PPS signal and isolate the VLF signal for best results.

Back 10 Feb 2019