JTMS

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JTMS
JTMS sim.jpg
Frequencies 3MHz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
,30MHz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
3,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range MHzMegaHertz (MHz) 10^6 Hz3,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,000 kHzKiloHertz (kHz) 10^3 Hz
- 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.)
ACFAutoCorrelation Function
Bandwidth 1700 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).1.7 kHzKiloHertz (kHz) 10^3 Hz
0.0017 MHzMegaHertz (MHz) 10^6 Hz
1.7 kHzKiloHertz (kHz) 10^3 Hz
0.0017 MHzMegaHertz (MHz) 10^6 Hz
1.7 kHzKiloHertz (kHz) 10^3 Hz
0.0017 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description JTMS is a meteor scatter mode that uses MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.). JTMS behaves similarily to FSK441.
I/Q Raw Recording
Audio Sample
JTMS uses a variation of FSKFrequency-Shift Keying called Minimum Shift Keying (MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.)), which allows a faster transmission rate per unit bandwidth. JTMS performs approximately as well as FSK441, and tends to produce cleaner decodes. Uses MSKMinimum-Shift Keying (When Shift/Bd = 0.5. It is impossible to get this ratio to be lower than 0.5, hence it is called the 'Minimum' shift.) at 1378.125 baudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second., with a character transmission rate 197 cps.


Samples[edit]

JTMS (Sim) JTMS Signal
JTMS sim.jpg
JTMS.jpg

Decoding Software[edit]

Hobby Level Software

Additional Links[edit]

Additional Images[edit]