[Elecraft] Firing up K3 attached to PC via USB

[donovanf at starpower.net]

>From the description of K3 firmware update dated 8-3-2015 
MCU 5.33 / DSP 2.86 / FPF 1.23 






PC applications can activate PTT and KEY at the K3S via the USB 
port's RTS/DTR signals. However, initial setup of the rig's USB port 
by the PC may cause pulsed or continuous activation of the transmitter. 
This can happen if the computer is turned on after the K3S, or if the 
USB cable is not connected. 


The K3S now a "Safe" mode (the default) which disables PTT-KEY 
transmit until the K3S receives a command via the USB port, such 
as a read of the K3S VFO frequency. 


To turn safe mode on/off, go into CONFIG:PTT-KEY and tap '1' to 
select "USB SAFE" or "UNSAFE". Exit the menu and turn the K3S 
off/on. 


Applications that use PTTKEY via USB but never send commands 
to the K3S may require "UNSAFE" mode. In this case, unwanted 
transmit can be avoided by turning the PC on before the K3S. 


73 
Frank 
W3LPL 

----- Original Message -----

From: "Fred Cady" <fcady at montana.edu> 
To: "Mike Flowers" <mike.flowers at gmail.com>, "John_N1JM" <johnn1jm at gmail.com> 
Cc: elecraft at mailman.qth.net 
Sent: Friday, February 9, 2018 12:40:42 AM 
Subject: Re: [Elecraft] Firing up K3 attached to PC via USB 

Go to CONFIG:PTT-KEY, tap the 1 key and set USB.SAFE. 

Cheers, 

Fred KE7X 


For all KE7X Elecraft books, see www.ke7x.com 


________________________________ 
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> on behalf of Mike Flowers <mike.flowers at gmail.com> 
Sent: Thursday, February 8, 2018 3:56 PM 
To: 'John_N1JM' 
Cc: elecraft at mailman.qth.net 
Subject: Re: [Elecraft] Firing up K3 attached to PC via USB 

Yes, it's normal. There is a config parameter you can set to eliminate 
this behavior. 

I can't think of it at the moment, but someone on this list will surely 
remember what it is. 

- 73 and good DX de Mike, K6MKF, Past President - NCDXC 

> -----Original Message----- 
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft- 
> bounces at mailman.qth.net] On Behalf Of John_N1JM 
> Sent: Thursday, February 08, 2018 2:53 PM 
> To: elecraft at mailman.qth.net 
> Subject: [Elecraft] Firing up K3 attached to PC via USB 
> 
> When firing up my PC with K3s attached and on, the K3s trips into transmit 
a 
> couple of times. Is that normal? 
> 
> 73, John N1JM 
> 
> 
> 
> -- 
> Sent from: http://elecraft.365791.n2.nabble.com/ 
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