P139-HD Audio System User Manual
GA063-3 Rev G 08/25/2015
Page 20 of 35
Headset Impedance: Sets the expected impedance of
the earphone between 150Ω and 600Ω. When set
to Track, the audio system will attempt to measure the earphone impedance, and set the output to 150Ω
or 600Ω, whichever is closest.
When a setting is changed, the web page updates the hardware with the new setting. While this is
happening the website will prevent further changes (Figure 7).
Note: If the “Updating Hardware” hardware
message appears for more than 10 seconds, the update has failed. Close your web browser and power
cycle the P139-HD to restart configuration. Any changes that were made but not saved to the MMC in the
last session will be lost. See Section 9.9 for more information.
Figure 7 Updating Hardware
