Jim, Mal,
the USB port cannot be used directly tp produce a "key signal", in
contradiction to a parallel or serial port. This is inherent to the USB
protocol.
As suggested by Jim the easiest way to proceed is a USB/serial convertor and
use it with your usual QRS software.
73, Rik ON7YD - OR7T
________________________________________
Van: [email protected] [[email protected]]
namens James Moritz [[email protected]]
Verzonden: donderdag 29 december 2011 16:43
Aan: [email protected]
Onderwerp: LF: Re: USB QRS
Dear Mal, LF Group,
...>Does anyone know of a QRS prog that uses the USB port on a computer
instead of the Serial or Parallel ports
de mal/g3kev...>
More to the point, how to connect the other end of the USB cable to the
transmitter, given that it only contains fixed 0, +5V power supply
connections and a differential pair carrying high-speed bi-directional data.
The usual solution is to use one of the inexpensive USB - RS232 converters.
The one in use here takes the form of a cable with USB plug on one end and
D9 plug on the other, containing the interface circuit. It seems to work
fine.
Cheers, Jim Moritz
73 de M0BMU
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