[Elecraft] ACOM 2000A and Elecraft K3

[Don Wilhelm]

Bill,

Setting AUTOINF to "1" the K3 will report any changes over the RS-232 
bus - this is not polling - it is information send by the K3 without any 
polling requests.
I don't know the ACOM 2000A capabilities, but if it does poll the K3 for 
information, the proper setting for the K3 is AUTOINF = nor.

Yes, when a logging program is involved, the logger will poll the K3 for 
information, and the ACOM may 'listen in' and respond to band changes, 
etc.  In that case, the K3 should be set to AUTOINF = NOR.

73,
Don W3FPR

On 10/27/2014 3:13 PM, Bill Turner wrote:
> I think I have figured out the connection issues when using a K3 with
> an ACOM 2000A.  I wrote up the following mini-tutorial to try to
> clarify what is, to me, a confusing situation.
>
> Please read it and let me know if I have made any errors and whether
> you find it helpful.
>
> If you find it helpful, feel free to copy and distribute any way you
> wish.
>
> Thank you,
>
> 73, Bill W6WRT
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
>
> When operating an ACOM 2000A with an Elecraft K3, there are two
> possible modes of frequency control. Each mode requires a different
> cable.
>
> When a PC is NOT connected:
>
> Use a cable like that shown in figure 7.6 of the ACOM 2000A manual.
> You should set the K3 AUTOINF menu option to "1". In this mode the
> 2000A will poll the K3 for band data and will change bands
> accordingly. The K3 will also send band data when you manually change
> bands on the K3.
>
> When a PC IS connected:
>
> Use the cable shown in figure 7.2 in the 2000A manual. You should set
> the K3 AUTOINF menu option to "nor".  Note that this cable does NOT
> have the TXD wire going to the ACOM 2000A, but it does have the TXD
> wire running between the legs of the Y connector. This cable can be
> either a single cable terminating in two DB-9 connectors or it can be
> a single cable with a "Y" adaptor connected at the DB-9 end. In either
> case, it must be the electrical equivalent of figure 7.2.  In this
> mode, the ACOM 2000A gets band data information ONLY from the logging
> program, not from the K3. If you close the logging program, the ACOM
> 2000A will NOT follow band changes from the K3. You can still do band
> changes by sending a "dit" as explained in the ACOM 2000A manual.
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