Mike,
See the firmware release notes for MCU 5.35. This is MAIN: ATTN and for
the K3S it is valid. For the K3, it is fixed at 10dB.
It is the amount of attenuation that is inserted when the Attenuator is
turned on. It does not change the normal operation of the K3, but does
allow different levels of attenuation for the K3S - it is a per band
setting.
73,
Don W3FPR
On 1/15/2017 4:43 PM, CenturyLink Customer wrote:
> I recently was setting up my K-3 for interface with WSJT-X software. In checking to be sure that the sound card was connected to Line-In, I found this menu setting. It appears to be a new item from a firmware upgrade, as it is not shown in my users manual. It is positioned between ALARM and LCD ADJ. It is set at 10 db and is not adjustable from the front panel. When trying to adjust this, I get a message of N/A. I assume that means "not adjustable".
>
> What is this menu item for? Why is it set at 10db attenuation? What functions does it affect? Thanks for any information that can be provided.
>
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