[Elecraft] K3 Beta 5r10 and LINK

[Joe Subich, W4TV]

 > Skillful use of diversity reception will enable you to pick up the
 > odds even with simple antennae.

Diversity is entirely different than LINK.  Diversity as engaged by
a one second HOLD of the SUB button in FW 5.10 (and a two second hold
in prior firmware versions) uses the same synthesizer for both
receivers so they are phase locked.  LINK as engaged by a one second
HOLD of the SUB button in prior versions of the software only slaves
the two VFOs with a constant offset which means the two receivers will
vary randomly in phase causing signals to fade in and out as the
receivers vary from in-phase to out-of-phase and back.

FW 5.10 simply moves true diversity to the one second hold of position
of the SUB button - as it should be - instead of requiring a two second
hold and relegates the inferior LINK to a programmable function.

 > During APDXC 2012 in Icom HQ Osaka, I spoke to Mr. Inoue JA3FA that I
 > did not understand why IC7800 did not have the function of LINK for
 > both VFOA & B so that I could use the dual receivers for diversity
 > reception.

The 7800 can not phase lock the two receivers.  Their dual receive
system is not capable of true diversity operation even if the receivers
are tuned to the same frequency (as they can be with software like CI-V
Commander - part of the DXLab Suite of software).

73,

   ... Joe, W4TV


On 2015-02-15 7:51 PM, Johnny Siu wrote:
> Hello Arie,
> I agree with you 'LINK' should not be abandoned.  Please excuse my language, I would consider the idea of abandoning the 'LINK' is stupid.
> During APDXC 2012 in Icom HQ Osaka, I spoke to Mr. Inoue JA3FA that I did not understand why IC7800 did not have the function of LINK for both VFOA & B so that I could use the dual receivers for diversity reception.  I also mentioned that their competitor K3 had that function which I often used.
> Skillful use of diversity reception will enable you to pick up the odds even with simple antennae.
> 73
> Johnny VR2XMC
>         寄件人︰ Arie Kleingeld PA3A <pa3a at xs4all.nl>
>   收件人︰ elecraft at mailman.qth.net
>   傳送日期︰ 2015年02月16日 (週一) 1:10 AM
>   主題︰ Re: [Elecraft] K3 Beta 5r10 and LINK
>
> Tony
>
> LINK ties both VFO's to the mail freq dial en keeps them insync when you
> turn the dial knob.
> So both receivers keep working on the same freq.
>
> What I often use i diversity listening so with two receivers and two
> antennas on the samen freq.
> Diversity puts the main RX audio on the left ear of the headset, and the
> Sub on the right ear. That's the normal situation.
> In my case, the F9-F12 buttons in N1MM contain commands to the K3 that
> switch the audio to my liking (that can  also be done in the Config, but
> that takes too much time during QSO) This way I can switch listening
> from diversity (listen both MainRX and SubRX at same time) to only main
> RX (main RX audio on both ears)  or only sub RX (Sub RX audio on both
> ears) depending on where the signal is best.
> The commands to do this are in the programmers manual of the K3. It's
> really fun to control some beautiful K3 features from the keyboard like
> this.
>
> 73
> Arie PA3A
>
>
>
>
>
>
> N2TK, Tony schreef op 15-2-2015 om 16:38:
>> Hi Arie,
>> I am not sure I understand what LINK does to help when both receivers are on
>> the same freq. What does F9-F12 below do to help?
>> Tnx
>> N2TK, Tony
> .....
>> - F9 = listen A-B
>> - F10 = listen A-A
>> - F11 = listen B-B
>> - F12 contains the commands to copy VFO freq and mode from A to B and LINK
>> the VFO's.
>>
>>
>
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