Saturday, January 26, 2019

GB3MHZ 13cm on PI4 mode

While on a visit to the South Birmingham club G3OHM to do some K3 upgrades I took the opportunity to see how the PI4 mode works, having never used it before. Looking through the UK beacon list there are only a few beacons running the mode, but one was GB3MHZ on 2320.830MHz, which was audible on cw from IO92AJ at 220km. Software was installed on the I7 laptop, audio was extracted from the K3S via its USB lead and the system left to run for 45 minutes

As can be seen, no decodes were received, despite the cw being audible. The 4 tones of PI4 can be seen between the cw / carrier sequence

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