Great guessing Dick!
That worked the first try. I've really got to start playing with
programming these things so I learn better how they work.
Thanks to Dick and others who have responded! Things seem to be working
fine now.
Bernie
W1AZ
On 6/10/2015 8:16 PM, Dick Dievendorff wrote:
I'm guessing...
Could the amplifier's RS-232 speed somehow have changed?
If you connect the KXPA Utility to the amp, what RS-232 speed does it say
(at the top of the screen)?
If it's not 38,400 bit/s, you might try changing the speed to 38,400 bit/s.
The command needed to do that, using the KXPA Utility's Command Tester, is
"^BRP3;" (don't enter the quotes, but do enter the caret ^ and semicolon ;
Then go to the Port tab of the KXPA Utility and click "test communications".
It should then discover the KXPA100 at 38400 bit/s.
The KXPA100 programming reference is here:
http://www.elecraft.com/K2_Manual_Download_Page.htm#KXPA100 or
http://www.elecraft.com/manual/KXPA100%20Amplifier%20Command%20Reference.pdf
The KXPA100 has two RS-232 ports and two RS-232 speeds, one for the Host PC
side (^BRP command) and another for the KX3 side (^BRX command)).
The KX3 side should always be at 38,400.
The PC side should be at 38400 unless you use a host computer program that
requires a slower speed.
When you change speeds with the KXPA Utility, you should go to the Port tab
and click "test communications"; the Utility will then try all the speeds
and find the one that you've changed to.
73 de Dick, K6KR
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bernie
Gardner
Sent: Wednesday, June 10, 2015 5:05 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KX3 - KPA100 communication problem
I have a KX3 with KPA 100 and PX3. They had worked fine until yesterday
when communication between the KX3 and my computer through a KUSB failed
when the KPA100 is on. The KX3 talks to the computer fine when the
amplifier is off, but as soon as I turn it on, either through the KX3 PA
mode setting or with the switch on the amp, the connection to the computer
fails. I can communicate with the amp OK. Also, the connection to the PX3
isn't lost but the speed drops from 38400 to 19200 with the amp on. The
connections between the amp/radio/px3 are per the
PX3 manual using Elecraft cables.
Thanks for any suggestions.
Bernie
W1AZ
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