[Elecraft] K3S and FT8

[Wes Stewart]

Fake it just moves the A VFO before transmit (if needed) and back for receive.  
The delays seem just a problematic.

On 7/31/2017 12:32 PM, Daniel Brown wrote:
> I saw the same thing when I had it set to split. I'll have to admit
> though that my rig is an IC-7000, not a K3 (yet).
>
> Changed over to "fake it" for the split operation setting, and it
> seems to do better, with faster xmits.
>
>
>
> On Mon, Jul 31, 2017 at 3:19 PM, Wes Stewart <wes_n7ws at triconet.org> wrote:
>> I've made a few QSOs with FT8 but have had less then stellar success.  In
>> looking for possibly causes I took a close look at timing, since a lot of
>> the chatter in the WSJT Yahoo group is about the need for close time
>> synchronization.
>>
>> I noted that when my transmit interval occurred, there seemed to be about a
>> one and a half second delay before the K3 began to transmit. I began an
>> exchange of email with Bill, G4WJS, about this issue.  I quote from one of
>> his:
>>
>>     "If you are seeing a 1.5s delay then that is because CAT commands sent
>>     before PTT, even if PTT is "virtual" due to using VOX, are taking
>>     roughly that long. The K3 series is problematic in that certain CAT
>>     commands can take a long time to complete, these are mostly mode change
>>     related, even if the mode does not actually change, as a DSP reset that
>>     takes 0.5s or so has to be completed before the CAT command returns
>>     success. I suggest setting "Settings->Radio->Mode" to "None" and setting
>>     the rig to USB-DATA-A sub-mode manually on both VFOs, as a test to see
>>     if things speed up for you."
>>
>> I tried his suggestion and didn't see much change, then I decided to turn
>> off Split in the program.  This reduced the apparent delay to <0.5 second. I
>> say apparent because these are eyeball measurements, best made by looking at
>> the clock display while listening for the TX audio to drop out.  The message
>> is 12.6 seconds long so if it ends at or around 13 seconds I would guess
>> good enough.
>>
>> Anyone else see any of this?
>>
>> Wes, N7WS
>>
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>
>