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Graphics Interchange Format  |  1995-02-22  |  14KB  |  960x592  |  1-bit (2 colors)
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OCR: PSK signal in audic freguency 1PP limi iter data signal TNC LPF 100P filtey VCO freauency divider 1600H7 12.8kHZ 4046 .06 4024 1600Hz 600Hz limi teI shift 74C 16 CLK 45 LPF 1600Hz 1600Hz + 45* 45 LEDC LED 1600Hz UP DWN extended circuit for comparator detection locking-in $LED LOCK oipne frequency loop ended detec