AFSK Paging Link

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AFSKAudio Frequency-Shift Keying Paging Link
AFSKPaging Waterfallthmb.jpg
Frequencies 72 MHzMegaHertz (MHz) 10^6 Hz72,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
72,000 kHzKiloHertz (kHz) 10^3 Hz
,76 MHzMegaHertz (MHz) 10^6 Hz76,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
76,000 kHzKiloHertz (kHz) 10^3 Hz
,450 MHzMegaHertz (MHz) 10^6 Hz450,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
450,000 kHzKiloHertz (kHz) 10^3 Hz
,460 MHzMegaHertz (MHz) 10^6 Hz460,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
460,000 kHzKiloHertz (kHz) 10^3 Hz
,850 MHzMegaHertz (MHz) 10^6 Hz850,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
850,000 kHzKiloHertz (kHz) 10^3 Hz
,928 MHzMegaHertz (MHz) 10^6 Hz928,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
928,000 kHzKiloHertz (kHz) 10^3 Hz
72,000 kHzKiloHertz (kHz) 10^3 Hz
72 MHzMegaHertz (MHz) 10^6 Hz
928,000 kHzKiloHertz (kHz) 10^3 Hz
928 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 72 MHzMegaHertz (MHz) 10^6 Hz72,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
72,000 kHzKiloHertz (kHz) 10^3 Hz
- 928 MHzMegaHertz (MHz) 10^6 Hz928,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
928,000 kHzKiloHertz (kHz) 10^3 Hz
Mode NFMNarrowband Frequency Modulation
Modulation AFSKAudio Frequency-Shift Keying
ACF
Bandwidth 9 kHzKiloHertz (kHz) 10^3 Hz9,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.009 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.009 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.009 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description It is easier to transmit the FSKFrequency-Shift Keying pager signal to the transmitter site as AFSKAudio Frequency-Shift Keying. It is changed to POCSAG format when re-transmitted.
I/Q Raw Recording
Audio Sample

It is easier to transmit the FSKFrequency-Shift Keying pager signal to the transmitter site as AFSKAudio Frequency-Shift Keying. It is changed to POCSAG format when re-transmitted.

The main FSKFrequency-Shift Keying signal is FMFrequency Modulation modulated in other modems and is re transmitted on another frequency. Since the audio of the regular FSKFrequency-Shift Keying Pocsag is really just a phased pulse train, it is easier to do such as this. The reason for the "packet radio" type sound because it uses the same two audio frequencies for the preamble and data from the afsk1200 usually heard on APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area. There can be synced systems through which a regular Pocsag signal can transmit the exact same data as the remodulated AFSKAudio Frequency-Shift Keying, or separate transmitters.


Samples[edit]





Decoding Software[edit]

PDW: But you will need either an extractor cable to extract the raw bits and put them into PDW itself, or modify/add source code to recieve audio tones.

Additional Links[edit]

http://vocaroo.com/i/s1miV3hCCCfC

Additional Images[edit]