Re: [wsjtgroup] JT65B Decodes
- At 06:54 AM 11/16/2006 -0800, Jim Forsyth wrote:
>You can still change messages several seconds into the TX period. RedundancyJim,
>and error correction mean that pieces of the transmission can be missing and
>it will still get through. I do that all the time and I use a 500 MHz
>machine with the latest version of WSJT. With the two tone messages you can
>make the switch even later.
I find that switching messages during xmit causes JT65 to not decode at
all. When I see someone responding to me, I turn the auto to off and set
up the correct response and then re-enable auto on. During the EME
contest, I saw a lot of switching of messages so they would not
decode. The only remedy for this was to shift in frequency, set the
tolerance to 25 and decode the latter part of the signal. I don't believe
there is a way to decode both messages during the one cycle so JT doesn't
decode them at all as the message does not add up.
I am using a P4 DUO processor at 3.2GHz and it is fast enough for decodes
prior to transmit. Unfortunately, I'm not fast enough to respond when I
need to change the callsign, generate the message, and click on the OOO
Lee Scott - AA1YN http://www.aa1yn.com
Home of the VHF & Up Register http://www.aa1yn.com/vhf
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- Lee, and all --
> I find that switching messages during xmit causes JT65 to not decode atThis is not my experience at all. I find that JT65
frequently decodes correctly even when the transmitting
station has changed his message well into the Tx period.
There is, of course, some loss of sensitivity when this
happens. If you are close to the margin, decoding can be
prevented. If the change is to a shorthand message, you can
almost always decode it correctly.
> Unfortunately, I'm not fast enough to respond when IJust double-click on the decoded callsign that you want to
> need to change the callsign, generate the message, and click on the OOO
respond to. The program automatically changes the "To
Radio" callsign, generates new messages, figures out which
message to send, and (if you wish) checks or unchecks the
"Tx First" box properly.
-- Joe, K1JT
- Thanks to ALL of those who have sent information on their computer systems! It appears that I may need to bite the bullet and get a faster laptop to realize faster decodes.Steve // VE7SL