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Strona 55
" Most operation is accomplished using Audio
Frequency-Shifted Keying (AFSK), whereby
the Terminal Node Controller (TNC) generates
audio tones to be transmitted as data by the
FT-920. To activate this mode of operation, the
front panel Mode selection must be set to
DATA-USB (even though “USB” may not be
the actual sideband utilized in operation), and
the rear panel AFSK-FSK switch must be set
to AFSK.
The FT-920 can also accept input from a TNC
or Terminal Unit (TU) operating in the FSK (Frequency-Shifted
Keying) mode, whereby a closure
to ground of the FSK keying line causes
the transmitted carrier to be shifted in frequency;
no audio tones are produced by the
TNC or TU." |
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