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K4 High Performance Direct Sampling SDR Software

Current K4 Production Software  

K4 Production Software

(Release 26)  10-26-2021

K4 Production Software - General Information

  • K4 software updates are handled at the radio itself.  An ethernet connection is required to obtain new software. It is also possible to load (or re-load) software from a USB flash drive. For further information on that topic, please refer to the K4 Operating Manual.
  • The K4 provides new features via software.
    As a result, you should consider the Release Notes as an extension of the Owners Manual. Documentation for the new features will be found there and will not appear in the Owner’s Manual until the next manual revision is released.

Current K4 Production Software Release Notes 


NOTE: If you experience any issues after a software update, please do the update a second time. This is usually because your K4 has not been updated recently. The software update application itself is subject to change, and a second attempt will complete any pending steps.

LCD FLICKER REDUCED: LCD DC-DC converter PWM frequency changed to 15 kHz to greatly reduce likelihood of artifacts at low brightness settings. (Was 19 kHz.)

MESSAGE PLAY CANCEL: In CW mode, cancelling message play would sometimes result in the orange message-play icon remaining on. TX ALC MENU ENTRY:

TX ALC should only be turned off under very specific circumstances; most users will never need to do this. To prevent unintentional changes to the MENU:TX ALC setting, the user is given an opportunity to cancel an ALC OFF action.

  • See K4 Software Release Notes for complete revision history.


    K4 Production BETA Software Release Notes  

    None at this time

    See K4 Beta Software Release Notes for revision updates.


    K4 Production BETA Software Installation Procedures  

    To install the beta software, make sure you have an ethernet connection, then:

    1. Tap Fn, then hold UPDATE

    2. Use the pulldown menu at the top of the screen to select Beta Release (if you didn't have this selected already).

    3. Tap Check for Updates. This downloads the new code but does not do the installation. This gives you an opportunity to optionally tap "Release Notes" and read the notes first.

    4. When you're ready to do the installation, tap "Install".

    NOTE: If the status area shows error messages of any kind, try doing the install a second time. You may have had an older version of the update app itself, in which case a second install should complete the process.