Unknown MDT

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Logic Trunked Radio: Passport Control Channel
Unk data link .jpg
Frequencies 400400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.4 kHzKiloHertz (kHz) 10^3 Hz
4.0e-4 MHzMegaHertz (MHz) 10^6 Hz
,900 MHzMegaHertz (MHz) 10^6 Hz900,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
900,000 kHzKiloHertz (kHz) 10^3 Hz
0.4 kHzKiloHertz (kHz) 10^3 Hz
4.0e-4 MHzMegaHertz (MHz) 10^6 Hz
900,000 kHzKiloHertz (kHz) 10^3 Hz
900 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 400 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).0.4 kHzKiloHertz (kHz) 10^3 Hz
4.0e-4 MHzMegaHertz (MHz) 10^6 Hz
- 900 MHzMegaHertz (MHz) 10^6 Hz900,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
900,000 kHzKiloHertz (kHz) 10^3 Hz
Mode NFMNarrowband Frequency Modulation
Modulation PSKPhase-Shift Keying
ACFAutoCorrelation Function
Bandwidth 5.5 kHzKiloHertz (kHz) 10^3 Hz5,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.0055 MHzMegaHertz (MHz) 10^6 Hz
5.5 kHzKiloHertz (kHz) 10^3 Hz
0.0055 MHzMegaHertz (MHz) 10^6 Hz
5.5 kHzKiloHertz (kHz) 10^3 Hz
0.0055 MHzMegaHertz (MHz) 10^6 Hz
Location United States
Short Description LTR Passport is a type of control channel (unlike the standalone LTR that doesnt have one) which consists of multiple radio repeater sites linked together to form a wide-area radio dispatch network.
I/Q Raw Recording Download file
Audio Sample

Description[edit]

This type of radio system uses these types of control channels if the System is "roaming", or has a "home base", or has a "collective" base. Thus the packets that are usually heard in each frame.

Since the LTR standalone doesnt use a control channel, it only uses the "blip" of data, like somebody keyed on and off the radio to let the system know its there. But, with Passport, this control channel is required because of the three roaming, home, or collective bases.