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TOPIC: Pure signal

Pure signal 24 Mar 2021 01:38 #1

  • K6TWO
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Will the DX version be able to implement a future Pure Signal software module? I've been told it requires a 2nd ADAC. I s this true or will the second Rx 2 fulfils this feedback path?
Last Edit: 24 Mar 2021 01:39 by K6TWO. Reason: Error in word
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Pure signal 24 Mar 2021 08:34 #2

  • Rome
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Hi,
SunSDR2 DX supports predistortion on a hardware level, what we need to do is implement Duplex in the firmware level first and then add a predistortion on both firmware and software levels. Duplex will be implemented during this year.
Роман, Roman
Expert Electronics
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Pure signal 26 Oct 2021 11:18 #3

  • Tom W3FRG
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I have been using the DX Transceiver with the German Design RF 2K+ Amplifier, original design with Controller update.
It uses no Predistortion or couplers attached and the imd suppression is superb.
Not only meeting, but surpassing, the FCC imd requirements.
Attached is an 80m picture from 80m taken some 300mi away of my station on 80m.
I was transmitting 1.3Kw at the time the picture was taken recently.

Regards,
Tom W3FRG
w3frgXmtSig80m.jpg
Last Edit: 26 Oct 2021 11:20 by Tom W3FRG. Reason: add xmit value
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Pure signal 26 Oct 2021 12:13 #4

  • kc2rgw
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This has been my experience as well. The only time I see a Sun with a noticeably dirty signal is if someone is driving the audio into clipping or driving their amp into compression. I switch between my Anan and Sun and when I have the audio dialed in very close, people can never tell which one I’m on. I also have a Kenwood TS-590SG and while that has more of an obvious signature than the SDRs, it is extremely clean compared to most operators, simply because I’m not over driving the rig or my amplifiers.
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