Zach Liang's docs concerning themself...

Zach Liang
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FDM like beacons

11 Apr 2013
on 16 , 15 and 17 mHz in sequence , first in AM mode , and after 10-15 secs in SSB mode . The DTMF tones are separators of the 3 different recordings , deliberately added! Received with magnetic loop , De1103 and Creative Zen as recorder If an…