Unknown trunking or data

From Signal Identification Wiki
Jump to: navigation, search

Unknown trunking or data
133187500 strangetrunking.png
Frequencies 131.1875 MHz
Frequency Range 131.1875 MHz - 131.1875 MHz
Mode NFM
Bandwidth 12.5 kHz
Location UK
Short Description Unidentified data signal, possibly trunking
I/Q Raw Recording
Audio Sample


Unidentified data signal, possibly trunking or possibly APT(Automatic Picture Transmission) from a NOAA satellite.

Analysing the NBFM-demodulated signal from a discriminator tap suggests that the modulation is FFSKFast Frequency-Shift Keying, using 1800Hz and 2400Hz tones, possibly similar to MPT1327.