The Correct Power Up and Power Down Sequence for "M" Model Radios

When using an "M" model radio, it is imperative that you allow the radio to shut down completely before turning off the 13.8 VDC power supply.  Failure to do so may cause in the radio not completely saving the operating state information which may result in the radio not starting up properly.

NOTE: Never power off the radio's 13.8 VDC power supply while an "M" model radio is running.  The only exception is if the radio fails to boot after 8-10 minutes when doing a firmware update

When powering down do the following:

  • Power down by pressing and releasing the radio's power button once.
  • Wait for the radio to fully power down.  Once the screen goes blank, the power button will stop flashing green and you will hear the last relay click.
  • Turn off the power supply (if this is something you do).


When powering up the radio, do the following:

  • Turn on the 13.8 VDC power supply to the M model radio.
  • Wait 5 seconds then power on the radio by pressing and releasing the power button once.
  • Wait for the radio to boot up completely (do not press the radio's power button again).  The power button will flash green before turning solid green (unless there is a GPSDO installed where the LED may be amber or blue (solid or flashing).  The power button should not show a a different color than green, amber or blue.
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