This morning someone had spot a 200/500 Baudot signal on 9300.0 cf.
The Baudot was a 200/500 ACF=15 (1.5 stop bits) idling on reversals (ryryryry)
While waiting for some traffic, i’ve saw the stn switching to an idle tone on 9298.0 cf, then into the well known WIDE Russian mFSK-4 150/4000 (12kHz bw total)
Very interesting stuff…
PS: in the screenshot, the time-line was none continuous, the station didn’t switch directly from its 500Hz reversals to the idling tone on 9298
PS #2: 9300 is a known mFSK-4 slot as shown on these logs:
Here are 2 videos to illustrate how looks like the russian wide mFSK-4 150Bd/4000Hz