Enigma ID F11

Status Inactive
Voice N/A
Emission mode USB; BFSK, 100 Bd, 620 Hz, ACF=16
Location Warsaw, Poland
Activity pages

Download audio sample

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:

0353 00000
4-digit ID  
Repeated 5 times Repeated 10 times

Traffic format:

Intro Preamble Message Postamble
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.

F11 was superseded by the newer F03/P03 modes, which continue to be paired with analog transmissions, albeit in a less rigid way.

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