These are the installation instructions for replacing the firmware
in a DPO4000 or MSO4000 series oscilloscope with the firmware in
the DPO4000_v*.zip file. Note that even though the file is named "DPO4000",
it supports the MSO4000 series products as well.

Contents of this zip package:

    install.txt      - this text file
    releaseNotes.txt - describes differences between firmware versions
    firmware.img     - oscilloscope firmware file readable by
                       DPO4000 and MSO4000
    Applicable open source licensing references.

Caution:
 
    Loading new firmware will cause all previously saved setups and reference 
    waveforms to be deleted. You may wish to save the internal setups to
    external .set files, and the internal reference waveforms to external 
    .isf files, before loading the new firmware.
 
    (To find the relevant menus referred to below, push the Save/Recall 
    button labeled "Menu" which is located in the area below the screen.)
 
    To save an internal saved setup to a .set file, first recall the setup.
    Then go to the Save Setup menu and select "To File" and proceed to save
    to a CompactFlash drive or USB flash drive. After the new firmware has
    been loaded, you can recall each .set file, saving each one in turn to
    an internal saved setup, using the Recall Setup and Save Setup menus
    respectively.
 
    To save an internal reference (Ref) waveform to a .isf file, first display
    (turn on) the reference waveform. Then go to the Save Waveform menu, set
    the Source to the appropriate Ref, set the Destination to File, and
    proceed to save to a CompactFlash card or USB flash drive. Because the
    oscilloscope can only recall single-waveform .isf files, you should:
        - Make sure to use Internal (.isf) file format, not Spreadsheet (.csv).
          Push the File Details side bezel button to set the file format if
	  necessary.
	- Be certain to save each reference waveform to a separate .isf file,
          do not use the save-all-waveforms-to-a-single-file feature.
    After the new firmware has been loaded, you can recall each .isf file to
    one of the reference waveforms, using the Recall Waveform menu.

Instructions:

    1.  Copy the file 'firmware.img' to a USB flash drive in the root or
        topmost folder.

    2.  Turn the oscilloscope off.

    3.  Insert the USB flash drive into the USB Host port on the front
        of the oscilloscope. (The two host ports on the rear of the
        oscilloscope may also be used.)

    4.  Turn on the oscilloscope.

        After a few seconds, the screen should display a message stating
        that the firmware upgrade procedure is in progress.

        Do not turn off the oscilloscope or remove the USB flash drive
        until prompted to do so! The procedure takes anywhere from eight
        to twelve minutes, depending on the brand and speed of USB flash
        drive being used.

    5.  When the screen says that the upgrade is complete, turn off
        the oscilloscope.

    6.  Remove the USB flash drive.

    7.  Turn on the oscilloscope.

        When the oscilloscope powers up, you should see a message indicating
        that the firmware upgrade procedure has successfully completed.

        Do not turn off the oscilloscope at this time! 
        Wait at least one minute after the message appears, or wait until the
        Menu Off button responds to a press before turning off the oscilloscope.
        Some firmware versions subsequently update other parts of the instrument
        after the firmware upgrade procedure message is displayed. This update
        cycle can take up to one minute to complete.


Currently Installed Version:

    The firmware version currently installed in the oscilloscope is shown
    in the About menu. Push the Utility button, then the bottom soft key
    labeled "About".

Troubleshooting:

    - If you try to load an older version of firmware, or the same version
      that is currently installed, the oscilloscope will not load the
      firmware and will display a message indicating the firmware on the
      USB flash drive is not newer than the current firmware.

      You can override this, and force the oscilloscope to load the USB
      flash drive's firmware.img file, by creating an empty file called
      "forceinstall.txt" on the USB flash drive in the root or topmost 
      folder.

    - If the firmware does not load, verify that the USB flash drive is
      supported by the oscilloscope. Push the Save/Recall Menu button and
      attempt to save a setup to the USB flash drive. If you cannot save
      and recall .set files, the USB flash drive may not be supported.
      Try another brand of USB flash drive. If other brands do not work,
      try one of the other USB host ports on the oscilloscope. There is one
      host port on the front and two on the back of the oscilloscope.

    - If the firmware does not load and the USB flash drive otherwise works
      fine, then the firmware.img file may be corrupted. Try downloading
      the firmware again.

    - New versions of firmware are released from time to time. Visit
      www.tektronix.com/software.

    - If you are still unable to load the new firmware, please contact the
      Tektronix Technical Support Center. Customers calling within the U.S.
      call 1-800-833-9200 press 3. Worldwide, please visit www.tektronix.com 
	to find contacts in your area.




