Digital Spectrum MemoryFrame MF-8000 Dokumentacja Pobierz pdf (Strona 221)

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Serial interface using a reed relay

Serial interface using a transistor (positive keying - not isolated)

On a DB25 serial port connector, pin 20 is DTR, pin 4 is RTS, and Signal Gnd is pin 7.

On a DB9 serial port connector, pin 4 is DTR, pin 7 is RTS, and Signal Gnd is pin 5.

A.3) PTT Switching

If the CW Port is not the Transceiver Port, TRX-Manager also puts a PTT signal on the unused

line of the CW port (not related with PTT switching which is always on TRX port). I.E : You

key the RTS line : a PTT signal is available on DTR line for PTT switching.

A more sophisticated PTT switching via the normal TRX-Manager's PTT Lineis also available by

using the Auto TX feature.

A.4) PARALLEL PORT

How to choose the parallel port

The CW interface keys the Select line of a parallel port. You must choose a free LPT port

because the CW Interface can not be used with any other device (i.e. a printer, rotor...).

However, it is compatible with the band decoder of TRX-Manager.

The program keys the Select line (Pin 17) while state of Strobe (Pin 1) is low. The CW

interface is compatible with the interfaces of the other popular programs :

Parallel interface (positive keying - not isolated)

A.5) System priority

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