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Do you have those waves when you transmit JT65?

YV5WZ
YV5WZ Member ✭✭
edited December 2019 in FLEX-6000 Signature Series
I have noted those waves when I work with WSJT-X and JTDx......Flex 6300, Windows 10 on Gigabytes MB with I7 processor 4940K 4gHz......is it a dirty transmission????  or it is normal?


image


George, YV5WZ / PY3ZZZ

Answers

  • kr4k
    kr4k Member ✭✭
    edited September 2017
    I experience the same on JT-65 and JT-9 - always ensuring there is no over driving the radio.Using WSJT-X software. Not sure where it occurs. Had several local hams look at it, and they say it is clean on the air.
    73/gus
  • YV5WZ
    YV5WZ Member ✭✭
    edited December 2019
    Thanks Gus.....same experience here....my locals ham say everything on my signal its clean....good to know Im not the only one curious about this

    73 !!  George


  • Walt
    Walt Member ✭✭
    edited July 2017
    Sometimes DAX can cause poor transmission -  I have to stop DAX and then restart it again.
    It is a bug that is already on the list.  I think.

    I do not show those spurs on my display

    Cheers

  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited December 2019
    It is very normal.  On transmit, we monitor the low-level RF inside the radio and this is just received noise.  It is not transmitted as only the signal in the final filter is actually transmitted.  Your signal is clean.
  • WA2SQQ
    WA2SQQ Member ✭✭
    edited May 2017
    Thanks Tim, I just learned something!
  • YV5WZ
    YV5WZ Member ✭✭
    edited May 2017
    Thank you Tim......I already did my 6600 reserve!!! :)  

    Best Regards

    George, YV5WZ / PY3ZZZ
  • K5CG
    K5CG Member ✭✭
    edited October 2018
    I have a Palstar HF-AUTO and these little spurious peaks show up once in a while during a tuning cycle but they always go away after the antenna is matched.
  • YV5WZ
    YV5WZ Member ✭✭
    edited December 2019
    Thanks Danny....SWR 1.1
  • Jim Gilliam
    Jim Gilliam Member ✭✭
    edited May 2017

    I noticed the same thing on voice and viewed one of my remotes while transmitting and it was as clean as a whistle. I was transmitting on a 6500 and receiving on a 6500 a hundred or so miles away. I was able to bring up two instances as one was received using Teamviewer, and the other transmitting locally from my computer client.


    Jim, K6QE

  • Mack
    Mack Member ✭✭✭
    edited March 2019
    George,

    If you'll notice those images are 70 dBm down and would never go out over the air.

    Mack
    W4AX
    Alpha Team
  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited May 2017
    Even if they were 0 dB down, they are outside of the final TX filter, so they would not be transmitted ;-)

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