Charles,
You should find the amp has a driver connected to pin 2.
To make sense of the signal directions, you have to know whether the
device is configured as DCE or a DTE. Data Communications Equipment or
Data Terminal Equipment. The 'transmit' and 'receive' signals are
relative to the DTE. In other words, the signal on pin 2 (RXD) will
have a receicver in the DTE and a Driver in the DCE. The PC is the DTE
and devices like the K3 and your amplifier are DCE type.
I know that the DTE/DCE designation for the PC does not make sense, but
the serial port of the PC started out to be a port which allowed the PC
to behave as a terminal.
73,
Don W3FPR
On 12/14/2015 2:50 PM, [email protected] wrote:
Thanks for the detailed explanation Don. It seems like that is what is
happening, the OM2500 may be sending info back on the line into the "Y"
connector, confusing Na3P on the computer end on making the OM2500 jump
frequency rapidly back and forth between the correct frequency and the
out-of-band phantom frequency. From the responses, there may be 3
possible solutions:
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