Frank,

ACC2 has two outputs: a keyline for the amp (always on), and a general-purpose 
programmable output (GPIO). The latter is what's controlled by the ACC2 IO menu 
entry. You can use this signal for various functions as described in the ACC2 
IO menu entry. 

When the amp is used with our custom KXPA100 interface cable, the ACC2 keyline 
signal is routed to the amp, and the GPIO signal is broken out to its own 
connector for your use.

73,
Wayne
N6KR


On Sep 30, 2015, at 1:25 PM, frank <[email protected]> wrote:

> 
> ACC2 = OFF  appears to be a factory default.  Why?
> 
> Other rigs do not disable the amp keying line.  Why was it neccessary to do 
> that in the KX3?
> -- 
> Frank - K5DKZ
> KX3 - 7550
> PX3 - 1143
> KXPA100 - 1566
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