Transcript Document

NAVMARCORMARS FREQUENCY NETTING
REVIEW OF: TERMS, CONCEPTS AND THEORY OF AN AMPLITUDE MODULATED SIGNAL
AN AMATEUR TRANSCEIVER WINDOW
DISPLAYS THE CARRIER FREQUENCY
• BANDWIDTH
• DEFINED AS THE –3db POINTS ON THE POWER CURVE: B.W .= (F2 –F1) OR,
• TWICE THE HIGHEST MODULATING FREQUENCY:
• A 3 KHZ MODULATION TONE PRODUCES A 6 KHZ WIDE SIGNAL WITH
TWO SIDEBANDS, EACH 3 KHZ WIDE, EACH CARRYING IDENTICAL INTELLIGENCE.
• AMATEUR SERVICE CHANNELS FOR AM MODE ARE 6 KHZ WIDE.
• AMATEUR SERVICE AND MARS CHANNELS FOR SSB ARE 3 KHZ WIDE.
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NAVMARCORMARS FREQUENCY NETTING
SUPPRESSED CARRIER UPPER SIDEBAND SIGNAL
NAVMARCORMARS DESIGNATION 3K00J3E
1.5 KHZ 1.5 KHZ
• TO CENTER TRANSMISSION SIGNAL INTELLIGENCE ON AN ASSIGNED FREQUENCY
WHEN USING USB MODE, SET YOUR TRANSCEIVER 1.5 KHZ BELOW THE ASSIGNED
FREQUENCY.
• EXAMPLE: ASSIGNED FREQUENCY 4012.5 KHZ – 1.5 KHZ = 4011.0 KHZ WINDOW FREQ.
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NAVMARCORMARS FREQUENCY NETTING
SUPPRESSED CARRIER UPPER SIDEBAND SIGNAL
NAVMARCORMARS DESIGNATION 1K24F1B SINGLE CHANNEL DATA
• TO CENTER TRANSMISSION SIGNAL INTELLIGENCE ON THE ASSIGNED
FREQUENCY WHEN USING FSK MODE, SET YOUR TRANSCEIVER 85 HZ
BELOW THE ASSIGNED FREQUENCY.
• EXAMPLE: ASSIGNED FREQ 4012.500 KHZ – 85 HZ = 4012.415 OR 4012.42 KHZ
WINDOW FREQUENCY.
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NAVMARCORMARS FREQUENCY NETTING
SUPPRESSED CARRIER UPPER SIDEBAND SIGNAL
NAVMARCORMARS DESIGNATION 3K00J3E SINGLE SIDEBAND VOICE
AFSK: 170 HZ SHIFT TNC’S
TONE PAIR: 2125 / 2295
• TO CENTER TRANSMISSION INTELLIGENCE ON THE ASSIGNED FREQUENCY
WHEN USING AFSK IN USB MODE, SET YOUR TRANCEIVER 2210 HZ BELOW
THE ASSIGNED FREQUENCY.
• EXAMPLE: ASSIGNED FREQ 4012.500 KHZ – 2.210 KHZ = 4010.29 KHZ WINDOW
FREQUENCY.
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