[amsat-bb] NO-84, what is the secret?

KO6TZ Bob my.callsign at verizon.net
Mon Dec 7 03:09:30 UTC 2015


The FM transmitter does not turn on unless the SSB receiver hears a 
PSK-31 signal.

Once you start transmitting on 28.120 USB, never stop for the duration 
of the pass.  Keep the transmitter turned on.   Just change the Macro 
Text as needed for the contact.  If you see the FM transmitter turning 
off and on, increase your power.  I usually need 40-80 watts.  As with 
anything on HF, band conditions are important.

The reference to 28.120 +2kHz means set the radio dial on 28.120 USB and 
transmit at 2KHz on the waterfall. (This is +/- for other station 
signals as you would expect.)

If your signal is too high on the waterfall to copy well, just turn the 
VFO to bring it down where you can copy yourself.  For the decoder, I 
suggest using anything that displays two or more signals.  For the 
transmitter, use DopplerPSK_ V:0.2.

Hope this helped.

KO6TZ   Bob

I heard APRS on the 144 MHz band.  But I did not hear any PSK31 on the
downlink.  I did not try to transmit.

1.    What's the secret to receiving PSK31 on FM?  I never tried that
2.    Transmit says 28.120 kHz +2 kHz SSB uplink.  Can someone please
translate that into USB DIAL and software tone?  If it is 28120 USB and 2
kHz tone, most SSB rigs attenuate the audio at that level.

Mark Lunday, WD4ELG
Greensboro, NC  FM06be
wd4elg at arrl.net

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