QTH: near Oral, SD
Class: Amateur Extra
QRP ARCI: 16638
KX3 Digital Mode Setup
DATA A mode
Many audio-generated data transmissions can be heard on the bands, using PSK31, RTTY, Olivia, JT65, FT8 and the newest digital mode, FT8Call.
A computer, soundcard and appropriate software are normally used.
DATA A mode is provided for this purpose. DATA A mode disables compression and RX/TX EQ settings automatically. It also places the radio into USB by default.
To use this audio data mode:
- Tap DATA twice and rotate the OFS/VFO B knob to select DATA A. Tap the switch again to exit the sub-mode display.
- Connect your computer's audio output to the MIC jack.
- Connect your KX3's PHONES jack to your computer's audio input. High quality shielded cables should be used. You may need an attenuator if the drive levels are too high.
- Refer to your data communications software manual to determine how to set up the KX3's VFO for accurate frequency display.
- While transmitting audio data, adjust the MIC GAIN for no more than 4 to 5 bars of ALC indication.
I find that the best method is to adjust audio drive levels and MIC GAIN to make 4 solid bars with the 5th bar blinking on the ALC indication. It takes a little finesse, but it can be done.