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STR#_3123.txt
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1999-10-22
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335b
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13 lines
Any two audio tones may be used, but they must be within the transmitter audio passband, and should not be harmonically related
Any two audio tones may be used, but they must be within the transmitter audio passband, and must be harmonically related
1200 Hz and 2400 Hz tones must be used
20 Hz and 20 kHz tones must be used
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