ADX Firmware Update Procedure
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Firmware Update Procedure:
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1. Copy the update file onto a USB drive.
2. Insert USB drive in the USB port on the rear of the ADX. 
3. Cycle power on the ADX.
4. Press the front panel knob as the unit boots. (The front panel displays 'Push 
   knob for firmware update')
5. Follow the on-screen prompts to update the system card firmware and reboot
   the unit.