UNID (for me) sounder was active on 24,25 october 2015:
start frequency: 7000kHz
stop frequency: 6700kHz
nomber of steps: 108
step value: ~2.8kHz
time spent on each channel: 10 seconds
total cycle duration: 18 minutes
moving choice: from top range frequency (7000) to bottom one (6700)
While watching some freqs around 4500.0 kHz, I saw a carrier moving up on frequencies.
I have made some screenshots & I/Q recs, trying to catch burst duration & scanning rate.
The total burst duration was approx. 1.823ms (515ms+ 89ms break + 1219ms)
Scan step was 3kHz
Scan rate was ~65kHz/min