Topband: All PSK31 Enthusiasts

[Tom Rauch]

> I'm sure I'll get my proverbial t-t in the ringer for this, but don't you
> think it would be prudent to find another frequency for PSK activity on
> top band?  I can only speak for myself, and PSK is a great new mode, but
> 1824 would not seem to be the best place to exercise it.

The main problem with PSK-31 in weak signal areas is how the TX 
signal is generated! 

The PSK signal is generated by feeding a low level audio signal 
from a soundblaster card into the audio input of a transceiver 
operating on SSB.

Any hum, noise, unwanted sideband energy, harmonic distortion, 
or even the less-than-perfect carrier suppression on the SSB 
transmitter make it less-than-ideal in spectral purity.

If the soundblaster card has any harmonic distortion at all, if the 
leads to the rig pick up any hum or have ground loops, if the 
transceiver has any noise or harmonic distortion anywhere in it, or 
if the transceiver has the slightest amount of filter blow-by or lacks 
perfect carrier suppression...it could cause a problem on many 
frequencies.

If we "pick" a frequency PSK...for technical reasons...it certainly 
belongs several kHz away from weak signal areas.

73, Tom W8JI
w8ji@contesting.com



--
FAQ on WWW:               http://www.contesting.com/FAQ/topband
Submissions:              topband@contesting.com
Administrative requests:  topband-REQUEST@contesting.com
Problems:                 owner-topband@contesting.com