SM6KIN:s    PSK OPTO INTERFACE

Following good hints is fetched from a HDL paper:

TUNE your PSK31 transmitter without Splatter!

1. Connect a dummy load to your rig, with a power meter in
   the line. If you don’t have a power meter, use the rig’s own
   built-in meter.

2. Start your PSK31 SW and select a TX window.
   DO NOT ENTER ANY TEXT.
   Click on the TX button and adjust your soundcard’s audio
   output to give no more than 25-30% of your rig’s rated output.
   DO NOT EXCEED THIS LEVEL!

3. Start typing text and check that the output is no more than
   50% of the rig’s rated output.

4. Check your ALC meter to ensure that there is NO ALC action
   whatsoever. If the ALC has to engage, you are overdriving
   your rig and splattering all over the band. Wide signals are
   unnecessary and antisocial.

5. Remember that PSK31 is THE ultimate QRP digital mode
   (at the moment). You don’t need to operate at high power
   levels – the lower the drive, the cleaner your signal will be.

USB TO SERIAL CONVERTERS
Help- I have no serial 25 or 9 pole connector!

Many – if not all - modern notebook computers do not come

supplied with RS232 serial ports but with USB ports. In order to use

a CAT interface with one of these you will require a USB<>Serial

port adapter/converter.

Some users have reported problems when using these converters:

in one case it was necessary to purchase a different model, while

with others a simple driver update was all that was required. The

general consensus is that the default driver supplied with Windows

XP is generally sufficient to solve any problems. 

I have not tested any converters yet. Let me know if you find some
cheap and good working ones! 
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