Posted by
scottw on
Jul 16, 2017; 7:02pm
URL: http://elecraft.85.s1.nabble.com/PSK63-D-Tones-tp7632484.html
I am a newbie when it comes to the digital modes and the KX3. The
following question may, therefore, be naive.
I have been experimenting using my Tentec transceiver to copy and send
APRS PSK63 beacons on 30 meters using the "APRS Messenger" software.
It seems to work fine using a Signalink USB sound card with the
program set for 2100Hz tones. I am tuned to 10.147.6 USB.
I want to try using the KX3 in PSK63 D mode to do the same thing, but
don't know what tone/shift the internal modem uses, so don't know what
frequency to tune the radio to. To quote WA8LMF:
"The actual transmitted RF frequency is the indicated suppressed
carrier frequency (i.e. "dial frequency") plus the audio tone
frequency (USB) -or- the suppressed carrier frequency minus the audio
tone frequency (LSB). The actual dial frequency you want WILL DEPEND
ON THE SIDEBAND YOU CHOOSE (either one will work) --AND-- ON THE
PARTICULAR AUDIO TONE FREQUENCY produced by the PSK program."
Up until now I have been using AFSK in USB mode to do these
experiments, and don't know how that translates when using a "direct"
PSK63 mode. How should I tune the KX3 to be spot on to the single RF
frequency for 30-meter PSK63 APRS operation, which is 10.149.700 MHz?
Any advice appreciated.
-Scott N3SW-
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