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CW character timing jitter

Lasse Moell
Lasse Moell Member ✭✭
edited August 2019 in SmartSDR for Windows
Running SSDR/Maestro 2.4.9.115 and Flex 6500. Keying direktly into radio front panel and using the built-in winkeyer. I notice that there are timing jitter to the characters i.e. a dash or dot may be shorter or longer than "normal", it's like a clock does not sync properly. I have not found out what setting will force this, and it is not always there, but sometime its more obvious. Restart does not "cure".  Anyone else see/hear this problem? BTW I just noticed similar behavour using the built-in keyboard, and running SSDR
/Lasse SM5GLC

Comments

  • Mike
    Mike Member ✭✭
    edited April 2019
    Are you using any other programs in connection with 2.4.9? I had a problem with jittery cw when using n1mm+. The problem was solved by changing the delay on the rig and n1mm+ to match.
  • Lasse Moell
    Lasse Moell Member ✭✭
    edited April 2019
    I have DX4Win running, will try with a bare minimum i.e. only SSDR running. Still a bit odd as I expect the logging program pretty quitet, not messing with the radio.

  • John - AF3K
    John - AF3K Member ✭✭
    edited August 2019
    Does the problem persist if you increase the Delay value in the SmartSDR for Windows P/CW panel to some level that keeps the transmitter keyed between words? 




  • Lasse Moell
    Lasse Moell Member ✭✭
    edited August 2019
    Well, yes I guess. I had it set to 150 ms and it was pretty bad, so reverted back to 10 or 15 ms. Thought it was a wee bit better but not sure, its back on 256 at the mo.. Really do not think this is the root cause, as I somtimes hear things go bad in a string of dits, wheras one or a few dits can get longer or shorter with out any reason. Very odd. Still have not confirmed if this is only on side tone or also on RF out, I need to record my self using seperate receiver for this.
  • John - AF3K
    John - AF3K Member ✭✭
    edited May 2019
    Agree it would be helpful to find out if the problem is just with the sidetone, or if persists over RF.
  • chris1165
    chris1165 Member ✭✭
    edited August 2019
    Did you ever find the cause or fix?
  • WØYVA
    WØYVA Member ✭✭

    I have this exact problem! I'm pretty sure it's not an RFI issue. I thought I had lost my 'fist' until I recorded a couple of CW strings and could hear this 'jitter' issue on playback.

    I hope someone is working on it!

    73, Bob, WØYVA

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