6400 Side transmissions, Is this Normal?

Dan, when you transmit or tune, the panadapter does not represent your actual transmit pattern.
So yes this is normal.
If you really want to see your transmit you can turn on FDX and open another slice on the same freq. Set that slice to receive XVTR, so transmit on slice A and receive XVTR on slice B. 100w should give you an S9 on the receive slice.

Ken has a great video on setting this up and demenstrating it.
https://youtu.be/CzT1qDKKySk

Our Flexes should get to -40db down, mine does.
What you should do is increase you output till your SDR play reads an S9. You should still look clean at S9, after you go over S9 things will start to show.

Ok that's fine, The radio can show an IMD of -40 DB down at full power. If you look at the horizontal lines on the screen on the receiver you count them from the very peak of the signal to the bottom to were the signal begines to spread out, that is your IMD.

So it could be set up at 5   so 5 10 15 20 25 30 35 40  or 10  10 20 30 40  

do you follow?

I saw the picture Dan, you should not see that same thing on another receiver or with the FDX test feature we have. If your putting out 100w from your radio and the receiver is at S6, your signal should look clean as I think you said it does.

Remember, when you transmit, the Flex panadapter does not reflect your output signal. So you can't use that to determine if your clean.

If someone can hear you at an S9 signal and they are on a Flex, ask them how you look to them.

You should see the same thing, or close. What we see on our panadapters is a bit of an education to understand what we are seeing. And this carries over to seeing other people's signals as well. One time I told a guy his radio was dirty on transmit, but I did not consider his signal was 20 over 9. Next day his signal was S9 and clean, lesson learned.

Dan any time I talk about this, it is alway about outside the band pass, on 40M, any RF on the upper side band for example.

Unless you are over driving something or something is very wrong inside your radio, (brocken) your signal should look clean.

It sounds to me that SDR Play is not displaying your signal correctly. Do you see the same thing when using the FDX signal test? And try this on 40M.

AS I said, check with other staions if your signal is at least S9. What do they see?

It looks ok.

Dan
It's just your radios TX being heard by the radios RX. Really just a display anomaly, more than anything else. Looks normal to me. 

     SDRgadgets

#FlexRadio IRC Chat

   73, Jay - NO5J

I think the SDR Play is over loading.

Hear are some explanations From Flex on this subject.

 Steve - N5AC, VP Engineering / CTO

• 1046 Posts
 
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Official Response





When the PA is on, the receiver can see the transmitter signal and can display it on the panadapter. The coupling between the transmitter and receiver varies by frequency and antenna selection. In some situations, the receiver will be slightly overloaded by the transmitter signal and so you may see the results of this in what would look like IMD in the pan adapter. Because of this, you should only use the display as a rough, relative idea for the on air signal, but should not be used to measure transmitter spectral purity. You can use two FLEX-6000s with a substantial pad to measure signal purity. 



During design of SmartSDR and the FLEX-6000, suppressing the panadapter or providing the exciter signal instead of the receiver were discussed, but each of these options had clear disadvantages we felt outweighed the minor overload artifacts that may appear.