PSK Paging link
| Paging Modes | |
|---|---|
| AFSK Paging Link - POCSAG - Glenayre Paging Link - PSKPhase-Shift Keying Paging link - FLEX - ReFLEX - Golay Paging (GSC) - European Radio Message System (ERMES) |
 | |
|---|---|
| Frequencies | 470 MHz,150 MHz |
| Frequency Range | 150 MHz - 470 MHz |
| Mode | FM |
| Modulation | PSK |
| ACF | — |
| Emission Designator | — |
| Bandwidth | 12.5 kHz |
| Location | United States |
| Short Description | Also known as PSK paging, is a one of a kind signal that allows side-by-side PSK to exist under extreme conditions in AFSK paging links, allowing for more dynamically processed DSP available. |
| I/Q Raw Recording | — |
| Audio Sample | |
Only one signal exists for this type of modulation: 454.475 MHzMegaHertz (MHz) 10^6 Hz In Chicago, IL. The input signal rests on 158.1 MHzMegaHertz (MHz) 10^6 Hz. The cause of the DSP is unknown, but the transmitter rests on top of Chicago's Oglive Transport center. However, it acts as a normal paging license. The license is unknown because of the input of 158.1 MHzMegaHertz (MHz) 10^6 Hz. FCC databases unfortunately do not list a license under these two frequencies. However, it could be possible that KSA810 is the license, but the license does not include 158.1 on the list of frequencies.
How to replicate this signal[edit]
A recent discovery in June 2023 by Yalek the Lembine, with audacity's IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. modulator plugins, and its nyquist prompt, allows the user to finally generate the complex waveforms. It is an unusual, but direct combination of AFSKAudio Frequency-Shift Keying and Audio PSKPhase-Shift Keying in a single spectrum, which we have never encoumtered before in the history of signal analysis.
In basic, it is just a matter of practicing side-by-side PSKPhase-Shift Keying and AFSKAudio Frequency-Shift Keying combined in one spectrum. Usually, you can use any center frequency you choose, but a nice range is 1600-2400 hz so as to not go too low or high in audio bandwidth. You will also need soRFmon's POCSAG encoder for generating the POCSAG pulse train to audacity @ 48 Khz ONLY.
For the data tones, if you end up combining the 1200 and 2400 bit modulations with the same center audio carriers + a notch filter of 600 hz, you will end up with a familiar sound that this type generates. The only difference, at 2400 bits per second you will need to multiply your FSKFrequency-Shift Keying shifts by 2 or more (perhaps a maximum of 8 for higher center frequencies), if you want to mimick the v.27ter modes.
The Idle tones require a middle base tone thats generated from the PSKPhase-Shift Keying. The FSKFrequency-Shift Keying tones are allowed to exist, however.
Here is an 2 minute clip that I generated from the encoder, audacity IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. plugin and nyquist prompt.. PLEASE BE WEARY: this info is actual pager data from 9/11/2001 and should only be used for signal analysis and NOT DECODING. DO NOT ATTEMPT TO DECODE THIS. ONLY USE THIS AS STATED FOR **SIGNAL ANALYSIS ONLY**.
IQQuadrature signals form the basis of complex RF signal modulation and demodulation, both in hardware and in software, as well as in complex signal analysis. waterfall images of the generated waveforms:
