DAX-‐16 Installation & Operation Manual
Rev 1.4
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both. The ADPCM uses 25% of the bandwidth of PCM, but PCM is higher audio quality. A busy network
may result in choppy audio.
Below the codec selection link is a box reporting the status of the digital audio input.
If the unit has an AES/EBU input board, the numbers 1 through 8 will appear, corresponding to the
AES/EBU pairs. Pairs 1 through 4 are connected to digital input A and carry channels 1 through 8. Pairs 5
through 8 are connected to digital input B and carry channels 9 through 16. If a pair is carrying a valid
AES/EBU signal, the background for that pair will be green. If the data is not valid, the background will
be red.
If the unit has a BLU link input board, the digital input status block will have a section marked IN and a
section marked OUT. If all is well, both sections will be green. If there is an issue, the IN or OUT block will
be red. The red portion refers to the BLU link IN port (Digital input A on the rear panel) or the BLU link
OUT port (Digital input B on the rear panel). Holding the mouse cursor over IN or OUT will show the
cause of the error. Clicking on the BLU link status box will bring up a page of BLU link registers that can
help troubleshoot any issues.
Firmware Updates
USL may issue firmware updates to add features or fix issues. These are sent as hex files. The DAX-‐16 has
two microcontrollers. The main processor is identified as P32. The second processor (which measures
audio for the bar graph display and drives the signal present LEDs) is identified as P24. The firmware
update page is shown in figure 10.
Figure 10 -‐ DAX-‐16 Firmware Update Page
Use the browse button to select the update file for the appropriate processor (P32 or P24). Click the
appropriate Update button to update that processor.
As the P32 processor is updated, the front panel Power LED will flicker. When the update is complete,
the web browser will disconnect from the DAX-‐16. Try reconnecting and verify that the update was
achieved. If it appears to have failed, see Appendix C for information on restoring the factory firmware.
As the P24 processor is updated, the front panel signal presence LEDs will flash. When they stop
flashing, the update is complete. Go back to the configuration page to ensure the update was successful.
The P24 processor update can be repeated, if necessary, without a factory code restore.
