[NLRS] EME contest score at N0AKC

[Ray J]

the WSJT  window shows the frequency and time base of each signal..... 
we had several times when their was several signals present... it was 
easy to keep track of who was who based on their frequency and time 
reference....

the newer versions of  wsjt have a embedded version of spectran to show 
the received passband in a waterfall type display...

its pretty hard to be on the "same" frequency... with Doppler shift.. 
frequency readout error, transverters drift... and the program does not 
seem to have a problem picking out different  signals less than 200hz away..

there was several times when calling cq that we never heard the signals 
but the program would decode them....

 loud eme signals are  at -10 to -16db or so,  cw is probably doable,   
we had several signals moving the s meter...

 it gets pretty hard to hear -16 to -23 db ..  you could probably never 
do a cw contact in this range..

and anything lower than -24 average you  almost never hear anything...
using averaging over a few periods it will decode to -30 db

It would be interesting what could be done the microwaves with  jt65.. 
if people can get reasonably stable frequency output...


W9RAY
Ray J



John (JK) Kalenowsky, K9JK wrote:

>Charlie, (but To: the list in hopes that this will be an "educational" 
>dialog)
>
>First, Congrats on the EME effort!
>
>Now, for the (hopefully) "educational" part...
>
>Never having played with JT65 myself but having played with PSK31...isn't 
>there a "Graphic" display that gives some indication of signal presence? 
>Maybe it's not 'real-time', though, like the "Waterfall" display I remember 
>from the PSK31 program that I used.
>
>Also, from what I've read/heard about the WSJT Programs (in the JT modes), 
>isn't there also some ability to AFC, i.e. the program will both find the 
>signal within a given bandwidth AND adjust itself (such as for doppler), 
>primarily by tracking the ONE of the "tones" (the synchronization tone) that 
>is present for an equal number of "bits" as the number of "bits" in the 
>message itself?
>
>The biggest potential problem that I can imagine would be trying to 
>distinguish two stations that were transmitting on or about the same 
>frequency, likely with similar received signal strengths...did you have any 
>experience with that? Or is that NOT a problem?
>
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