Measuring intermodulation distortion of course, is not an easy thing to do unless you have specialised equipment, so most operators just ‘ wing it ’ by dropping their ALC levels and hoping for the best. InterModulation Distortion ( IMD) was apparently a huge problem due to poor or careless operators transmitting very distorted signals which would wipe out other operators on the band and make it impossible to decode messages. One of the things that I learned straight away from Julian's blog was to take great care not to transmit bad signals on PSK. Apparently, he'd been battling cancer for quite a while and finally succumbed to it □ It was G4ILO's great enthusiasm for the mode which originally got me interested and I was very sad to hear that Julian passed away. The IC-7610 can operate these modes without any PC involvement and thanks to its ability to connect a keyboard (wired or wireless), it's a doddle to just have a go!
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