NORTH KOREAN DIPLO

BPSK SERIAL TONE MODEM

FFT-SPECTRA

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Depending on the symbol rate, the Korean PSK system shows a different FFT-spectrum.
What all Baudrates have in common is a very wide and distorted signal, that tends to cause
splatter on frequencies way above and below the actual transmission channel.

• 150 Bd spectrum using SSB setting
• 300 Bd spectrum using SSB setting
• 600 Bd spectrum using SSB setting
• 1200 Bd spectrum using SSB setting

The Baudrate can easily be determined by decoding the signal in AM and running the RX-
output into an FFT-analyzer.

• 150 Bd spectrum using the "AM-method"
• 300 Bd spectrum using the "AM-method"
• 600 Bd spectrum using the "AM-method"
• 1200 Bd spectrum using the "AM-method"

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