|Emission mode||USB; BFSK, 100 Bd, 620 Hz, ACF=16|
|Known counterpart stations||E11, G11, S11, S11a, M03, F03, P03|
F11 was a digital flavor of the Polish 11 operator, active from the late 2000s until December 2018.
Null message format:
|Repeated 5 times||Repeated 10 times|
|0325||88888 88888||41893 23055 ... 45276 63951||88888 88888||00035 00035|
|4-digit ID||5-digit single groups||Group count, including "88888"|
|Repeated 5 times|
F11 was attached to many schedules of E11, S11a, and M03, delivering the same traffic 15 minutes before the analog transmissions. The frequency used by F11 was typically no more than 1 MHz away from the analog broadcast. Each F11 transmission was followed by an identical repeat 5 minutes later.