AFSK Paging Link

From Signal Identification Wiki
(Redirected from Some Sort of Packet?)
Jump to: navigation, search
Paging Modes: AFSKAudio Frequency-Shift Keying Paging Link - POCSAG - Glenayre Paging Link - Motorola PURC Tone Remote Control - FLEX - ReFLEX - Golay Paging (GSC) - ERMES

AFSK Paging Link
Frequencies 72 MHz,850 MHz,928 MHz,76 MHz,450 MHz,460 MHz,470 MHz
Frequency Range 72 MHz - 928 MHz
Mode NFM
Modulation AFSK
Emission Designator
Bandwidth 9 kHz
Location Worldwide
Short Description A variant of POCSAG/FLEX with audio FSK modulation as both waveforms utilize pulse trains. Typically found as uplinks/downlinks to pager network transmitters.
I/Q Raw Recording Download file
Audio Sample

POCSAG and FLEX are read as pulse trains in FMFrequency Modulation as their spectrum of FSKFrequency-Shift Keying is only 2 carriers switching on and off. With this in mind, additional transmitters can use that pulse train waveform to be re-modulated as AFSKAudio Frequency-Shift Keying modes in an FMFrequency Modulation baseband ranging from Bell-202, Lojack, or any other modes as uplinks or downlinks in the RFRadio Frequency bands.

Audio files:[edit]



other examples:[edit]

Some other examples done with the dutch POCSAG encoder part of SoRFMon's suite of demo software, and modulated with various audacity plugins to create realistic waveforms:

The result when AFSKAudio Frequency-Shift Keying is mixed in with Flex @6400 BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second.: