jks

About

Username
jks
Joined
Visits
29,784
Last Active
Roles
Member, Administrator, Moderator
Points
203

Reactions

508Helpful462Awesome

  • Who runs Linux for their main OS/Browser [how to run Dream on Linux]

    jksjks
    Under "Chart Selector" the "History > SNR / Audio" chart is a good way to see the SNR trend as propagation changes. It also charts audio drops over time.
    I find that +15 to +18 dB SNR minimum is needed for uninterrupted audio when the broadcaster is using 64 QAM.

    KA7U

  • Offset issue [offset field of label edit panel, fixed input parsing bug]

    jksjks
    That's precisely what it's used for. Click on an existing NDB entry to see (but I guess I don't ship with any NDB entries defined by default anymore). Anyway, when you set an offset in a label you should see that the label vertical line points at the frequency + offset position, but a small triangle appears at the carrier position. That's so you can tell which carrier belongs to the NDB. The offset field can be set to a positive or negative value in case the NDB modulates on only one sideband (or is stronger on one sideband, or you need to place the label on the opposite sideband because there are too many labels already on the other sideband).

    Another NDB assist: the large (outer) + and - frequency step buttons will increment in alternating 400 and 1000 Hz steps to match the common NDB modulation spacings.

    WA2ZKD

  • Remote access kiwisdr using console or Putty

    jksjks
    Alright, looks like this hack worked for him. He was able to change the root account password and use ssh/putty normally. So we can do this again if absolutely necessary to get someone out of a jam with remote access.

    sq5m

  • Dealing with excessive noise - SOLVED: Ethernet over Power caused noise

    jksjks
    Martin,

    That reminds me that I've been meaning to create a "gallery" of waterfall / spectrum screen caps of common interference sources. Lots of situations have been identified now: BPL, xDSL, electric fences, different SMPSs, the Ethernet problem, ADC overload, ...

    Huub

  • Dealing with excessive noise - SOLVED: Ethernet over Power caused noise

    jksjks
    Ugh, that's just about the worst noise I've ever seen.

    It might be ADSL or broadband-over-powerline (BPL). Note how the spectrum is obviously "notched" around the 30m, 20m, 17m and 15m ham bands (purple segments in band display). That's the service provider trying to keep hams happy, but failing dreadfully in this case. If you rotate the loop does the noise null at all?

    I think it might also be several independent noise sources. I've seen those strong 0 - 30 MHz lines that look like static crashes before. I think they come from seriously defective switch mode power supplies.


    image
    roach