[KX2] WSJT-X Split - Rig or Fake It?

[MaverickNH]

I'm using a KX2/KXPA100 at 40W on a Win10 laptop with WSJT-X 2.1.0 for FT8.
Antenna is a G5RV at 40ft with base ATU 150ft away. I've been advised
elsewhere that "Fake It" is a better choice than "Rig" for Split Mode:  "it
depends on what filter the radio has. Most are 2.4Khz (300-2700). If so you
would most likely need to be between around 600 to 2300. It also depends on
the skirts of the filter on where power will drop off and you can maybe have
harmonics. If you want to limit your transmit audio to 1500-2000 you may not
be able to find a clear place to transmit. If you have CAT control then fake
it automatically will adjust your transmit audio frequency to be in the
sweet spot of the filter."

I understand the KX2 filter is DSP Filtering‎: ‎50-4000 Hz, so am not sure
about using "Fake It" or "Rig" and would appreciate comment. Thanks!

Bret/N4SRN



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[Richard Ferch-2]

The long quote is not describing the difference between "Rig" and "Fake
It". It is describing the difference between "Rig" or "Fake It" (either
one) and "None". It is the difference between having some method to QSY the
radio between RX and TX (either "Rig" or "Fake It" can do that), and not
QSYing the radio between RX and TX.

The difference between "Rig" and "Fake It" is simply in how the radio is
QSYed. "Rig" uses the radio's Split capability to switch frequencies
between RX and TX. "Fake It" actually QSYs the main VFO between RX and TX.

The reason "Fake It" is suggested is due to the way WSJT-X verifies whether
the QSY has taken place. With some radios and some rig control methods,
WSJT-X takes so long to turn split on and off and verify split status that
it turns out that simply QSYing the main VFO is faster.

Try them both, and take special note of how long it takes from the
beginning of a transmit cycle until the rig actually starts transmitting.
If "Split" takes noticeably longer than "Fake It", then use "Fake It".

73,
Rich VE3KI


N4SRN wrote:

I'm using a KX2/KXPA100 at 40W on a Win10 laptop with WSJT-X 2.1.0 for FT8.
Antenna is a G5RV at 40ft with base ATU 150ft away. I've been advised
elsewhere that "Fake It" is a better choice than "Rig" for Split Mode:  "it
depends on what filter the radio has. Most are 2.4Khz (300-2700). If so you
would most likely need to be between around 600 to 2300. It also depends on
the skirts of the filter on where power will drop off and you can maybe have
harmonics. If you want to limit your transmit audio to 1500-2000 you may not
be able to find a clear place to transmit. If you have CAT control then fake
it automatically will adjust your transmit audio frequency to be in the
sweet spot of the filter."

I understand the KX2 filter is DSP Filtering‎: ‎50-4000 Hz, so am not
sure
about using "Fake It" or "Rig" and would appreciate comment. Thanks!

Bret/N4SRN
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[Bob McGraw - K4TAX]

I'd suggest using RIG for SPLIT mode. This takes care of any issues of concern

Bob, K4TAX


Sent from my iPhone

> On Aug 19, 2019, at 5:23 AM, MaverickNH <[hidden email]> wrote:
>
> I'm using a KX2/KXPA100 at 40W on a Win10 laptop with WSJT-X 2.1.0 for FT8.
> Antenna is a G5RV at 40ft with base ATU 150ft away. I've been advised
> elsewhere that "Fake It" is a better choice than "Rig" for Split Mode:  "it
> depends on what filter the radio has. Most are 2.4Khz (300-2700). If so you
> would most likely need to be between around 600 to 2300. It also depends on
> the skirts of the filter on where power will drop off and you can maybe have
> harmonics. If you want to limit your transmit audio to 1500-2000 you may not
> be able to find a clear place to transmit. If you have CAT control then fake
> it automatically will adjust your transmit audio frequency to be in the
> sweet spot of the filter."
>
> I understand the KX2 filter is DSP Filtering‎: ‎50-4000 Hz, so am not sure
> about using "Fake It" or "Rig" and would appreciate comment. Thanks!
>
> Bret/N4SRN
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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