Hi Manfred - you're right - from 6481.8 up it constantly occupies 3kHz digi UT and its emission was not interrupted during the broadcasting of the stations of interest to us.
Despite this, the signal of the Russian operator was clear to me.
During my previous session of listening to this channel, I saw and heard some words but it was the end
and I was so surprised that I did not understand anything.
The Russians, however, are heard about 5 min before and after the transmission of the S11a station.
The coincidence of the broadcast time and the proximity of the FRQ is puzzling whether this is a coincidence or a deliberate action by the Russians.