Hi there Bruce. Interesting question. Last night I made some captures of the TDF carrier and some of it's sidebands. I will see if I can make some calculations on where the sidebands should be and compare them with what I see over the air. You will have to ignore the handful of spurious carriers that are unfortunately real close to the main carrier but there does seem to be a pair of sidebands visible on each side of the carrier and also a lone sideband much further out on both sides. Also as my SDR is not GPSDO the x-axis of my plots are relative only. However the frequency intervals along the frequency axis are accurate. More to come later. 73 Gedas W8BYA
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