Claudio,
The RS-232 connector on the K3 is generally regarded as an input. The
computer COM port (or USB to serial adapter) is normally considered as
the output device.
First assure yourself (or contact support for those devices to be
certain there are no RS-232 DRIVERS (receivers are OK) in their RS-232
ports, and if there are drivers, can they be disabled. There must be
only one driver on each line of the RS-232 connection or the circuits
will not work because an active driver's voltage level will interfere
with the inactive drivers. See information on RS-232 for more complete
information and voltage levels of active and inactive drivers.
You will need two RS-232 DE9 Y adapters (unless you can find one with
one female 3 male connectors. The female connects to the computer and
one each of the male connectors go to the K3, your amp, and the antenna
switch.
73,
Don W3FPR
On 5/28/2019 12:58 PM, PY2KP wrote:
> Hi Guys
>
> I bought a K3 and only have an RS232 output, I need to control a linear OM and antenna switch.
> How could I control the two devices ? I think of making a Y-cable, will it work?
> Thanks everyone for the answers.
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