Unknown NFM Squelch system

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Unknown NFMNarrowband Frequency Modulation Squelch system
Unk sqlench.jpg
Frequencies 855.1119 MHzMegaHertz (MHz) 10^6 Hz855,111,900 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
855,111.9 kHzKiloHertz (kHz) 10^3 Hz
,855.3618 MHzMegaHertz (MHz) 10^6 Hz855,361,800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
855,361.8 kHzKiloHertz (kHz) 10^3 Hz
Frequency Range 855111900 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).855,111.9 kHzKiloHertz (kHz) 10^3 Hz
855.112 MHzMegaHertz (MHz) 10^6 Hz
855361800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).855,361.8 kHzKiloHertz (kHz) 10^3 Hz
855.362 MHzMegaHertz (MHz) 10^6 Hz
Mode NFMNarrowband Frequency Modulation
Modulation FMFrequency Modulation
Bandwidth 10 kHzKiloHertz (kHz) 10^3 Hz10,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.01 MHzMegaHertz (MHz) 10^6 Hz
10 kHzKiloHertz (kHz) 10^3 Hz
0.01 MHzMegaHertz (MHz) 10^6 Hz
10 kHzKiloHertz (kHz) 10^3 Hz
0.01 MHzMegaHertz (MHz) 10^6 Hz
Location New York City, USA
Short Description Very low hum, not a constant tone. Repeating pulses, and pulses seem to differ between different NFMNarrowband Frequency Modulation channels of the system being used. Possible squelching, XTCSS?
I/Q Raw Recording Download file
Audio Sample

Description[edit]

Very low hum, not a constant tone. Repeating pulses, and pulses seem to differ between different NFMNarrowband Frequency Modulation channels of the system being used. Possible squelching, XTCSS?

This is DCS. --Cartoonman (talk) 12:49, 7 January 2016 (NZDT)

Samples[edit]

Sample 1 Sample 2
Unk squelch 1.jpg
Unk squelch 2.jpg