Yesterday I made my first PSK contact using FLDIGI. Today I decided I would post a few more details of my setup for those who care to see. It is actually quite simple…and I later discovered some helpful hits in the KX3 Owner’s Manual that describes more details on data modes.
First I discovered my KX3 COM port by using the KX3 Utility and took note of the speed (shown as COM8).
Next, I went into FLDIGI and set up the Rig control (here are my settings).
NOTE: Hit Initialize to get the radio to talk with FLDIGI (if it errors out with IOERROR there is something wrong with your setup).
I then configured the audio controls.
You will notice that I am using Line In for Capture (microphone did not work in my setup).
Using the KX3-PCKT cable set (red and green/blue banded cables) I connected the KX3 Phones jack to my computer’s LINE IN jack. I then connected my computer’s Phones jack to my KX3’s MIC jack.
My radio looks something like this (I don’t have a cable in the ACC2 jack).
Once I plug everything in I could then see the waterfall.
Now you need to set up your KX3. The KX3 Owner’s Manual covers the modes and setup in nice detail but here are a few basics.
Set Power to less than 5 Watts.
HINT: If you radio has TX red light on…but no RF power going out, just make a small adjustment to output power (going from 5.0 to 4.9) and that may “wake up” the KX3 and let it work again.
Set mode to Data A.
Note: I was able to transmit using USB (phone) mode…however the notes in the manual state that DATA A is preferred because it disables compression and optimizes transmit ALC.
Set ALC to 4 or 5 bars
As mentioned in the last bullet from image above…you should adjust MIC gain to proper ALC levels. I found that I didn’t need to modify this much. Process is pretty easy…another good example of how to do this is below.
In case you have adjusted the bandwidth (or if its set narrow) just turn PBT I knob so it shows approximately BW 3.00 (you should see the width on the waterfall).
Hope this helps.