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F03

Enigma ID F03

Name
Frequencies
Status Active
Voice N/A
Emission mode USB; FSK-2, FSK-4, GFSK-2, GFSK-4
Location Warsaw, Poland
Activity pages

Known counterpart stations E11, G11, S11, S11a, M03, F11, P03

F03 and P03 are the digital flavors of the Polish 11 operator.

The designator F03 refers to the FSK modes. At least the following variants are known to exist:

Variant Tones Baud Shift [Hz] Center [Hz] ACF Sample
F03a 2 100 200 +600 896

F03b 2 200 400 +800 896

F03c 2 400 960 +1120 896

F03d 2 200 400 +600 -

F03e 2 200 400 +800 -

F03f 2 400 800 +1200 -

F03g 4 100 200 +800 448

F03h 4 200 400 +1000 -  
F03i 2 100 800 +1200 -

F03j 4 100 400 +1200 -

F03k 2 400 800 +1200 -

All F03 schedules are twice weekly, follow year-round UTC (no DST adjustments), and typically use up to three different frequencies depending on the month - one from November to February, another from May to August, and yet another for the remaining months. Each F03 transmission is followed by an identical repeat 5 minutes later.

F03 and P03 have been active since at least 2014, gradually replacing the older digital mode F11 over the next four years.