[SADXA] FT8 Frequency Measurements

[Richard Solomon]

I don't use CAT control on my
FTDX-5000MP. The only Serial
Port on the radio controls the
SPE Amplifier.

I await the day when USB will
be the standard on YAESU
radios.

73, Dick

On Thu, Jul 5, 2018 at 11:04 AM, Wes <wes at triconet.org> wrote:

> Actually, it is an output.  Your sound card is supplying an audio signal
> to your SSB radio.  If FT8 is using CAT control, and you have Split on, FT8
> might change your VFO during TX and adjust the audio frequency
> commensurately to minimize harmonic distortion in the passband.
>
> Wes
>
>
>  On 7/5/2018 10:45 AM, Richard Solomon wrote:
>
>> No idea, I just trust to faith that the
>> spectrum in FT8 has some meaning.
>>
>> BTW, it's not an output per se. It's
>> a point on a frequency spectrum.
>> Much like if tuned the radio up 1 KHz,
>> my signal should appear at 1 KHz
>> on the spectrum.
>>
>> 73, Dick
>>
>> 73, Dick
>>
>> On Thu, Jul 5, 2018 at 10:10 AM, Wes <wes at triconet.org> wrote:
>>
>> Are you sure that FT8 is outputting 2 kHz?
>>>
>>>
>>> On 7/4/2018 6:10 PM, Richard Solomon wrote:
>>>
>>> It was a slow day today, so I
>>>> decided to measure my XMT
>>>> Frequency on FT8.
>>>>
>>>> Now, my Frequency Counter
>>>> (HP 5334B) derives its reference
>>>> frequency from a GPSDO, So I
>>>> am rather confident in my readings.
>>>>
>>>> I set my FTDX-5000MP readout
>>>> to 24.911 MHz and my Transmit
>>>> frequency to 2,000 Hz in FT8.
>>>> That should put me on 24.913.
>>>>
>>>> BUT, my counter read 24.912 ??
>>>>
>>>> I think it's an artifact of setting
>>>> the mode to USB/PKT, but I
>>>> find nothing in the manual that
>>>> discusses that.
>>>>
>>>> I verified the radio is OK by loking
>>>> at my XMT frequency in CW Mode
>>>> and it was right on.
>>>>
>>>> There is a menu item (087) that
>>>> I need to look at, maybe diddling
>>>> that will fix the problem.
>>>>
>>>> Until then, I'll set the radio to + 1KHz
>>>> when I operate FT8.
>>>>
>>>> I presented this on the WSJT site,
>>>> but no response yet.
>>>>
>>>> Maybe I am wrong, but I don't
>>>> think so.
>>>>
>>>> 73, Dick, W1KSZ
>>>> ______________________________________________________________
>>>>
>>>
> ______________________________________________________________
> SADXA Website http://www.sadxa.org
>
> SADXA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/sadxa
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:SADXA at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> You can support qsl.net: http://www.qsl.net/donate.html