[RTTY] GU0SUP WAEDC RTTY (SOABLP)

[Kok Chen]

On Nov 13, 2006, at 10:30 AM, Phil Cooper wrote:

> each time I called someone, all I got was AGN?? AGN??

Yeah, FSK is pretty much that way.  If you look at the bit error rate  
curves, a 6 dB difference in signal to noise ratio can make a signal  
go from pristine printing to something that is completely garbled.

To the majority, you were probably just on the "good" side of the BER  
curve when the band conditions were better and fell to the bad side  
when conditions got worse.

When you live on the hairy edge (like me), band conditions matter  
more than it does to the guys with the heavier equipment.  They are  
normally operating well past the good side of the detection  
threshold.  As the band conditions deteriorate, they are still over  
the detection threshold.  At some point, they can only hear one  
another. :-)

If you look at the Mercury Transit pictures from last Wednesday, you  
will see a pretty large sunspot rotating into view.  That may have  
contributed to the K index going over 4 on Saturday:

http://www.sec.noaa.gov/rt_plots/kp_3d.html

73
Chen, W7AY