Rig control uses a serial port's TXD and RXD signals to send commands
to the transceiver and to receive responses from the transceiver.
Some transceivers can be directed to switch between reception and
transmission by sending rig control commands. Others can only be
switched via an input signal (often named SEND or PTT); this is
typically handled by using a serial port modem control signal (DTR or
RTS) to drive a one-transistor interface that generates the required
receive-transmit switching signal.
In theory, then, both rig control and receive-transmit switching can
be accomplished with a single serial port. If the rig control and PSK
applications are separate and do not communicate, then two serial
ports will be required: Windows won't allow two diffferent
applications to open the same serial port. A single application that
provides rig control and receive-transmit switching (e.g. MixW) or a
set of interoperating applications (e.g. DXLab) require only one
serial port. HRD's documentation should reveal whether it requires
one or two serial ports.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, "dalepavlicek" <[EMAIL PROTECTED]> wrote:
>
> Hi
> Have several questions,concerning software and digital operation
and
> rig control. I use HRD,via a CI-V cable to my 746pro and to a serial
> port on my computer. ....works just great. Also I have a DONNER
sound
> card interface,which goes from the Icom's ACC-1 port to the in and
out
> of my computers sound card and the computers serial port. ....works
> just,using DIGA PAN, great many contacts on psk-31. I see HRD has a
> psk31 program built into it.I have looked on their info and can't
find
> a answer.
> If Iam using HRD,or any other rig control program that goes
> between the CI-v port and the computers serial port and the program
> supports digital modes ,like HRD, since I have only one active
serial
> port,HOW do we get it all to work? Is there a interface that does
> both? I don't know if Iam just makeing myself more confused or what.
> What connections are required between the computer and the radio to
> make say...HRD work both as a rig control program and with a click
of
> the mouse a psk-31 control program?
> Any help on this ,I would be greatful for.
> thanks
> dale wt4t
>
