Disclaimer:
3
rd
party and/or custom firmware providing extra features are not covered in this manual.
21
Ultra AVR Key – User Manual
amplifiers, especially if you put the HDfury AVR-Key in the middle of your cable run. If you previously
had to use an amplifier, the HDfury AVR-Key can most likely take its place. The HDfury AVR-Key has been
used with 50 foot (and longer) HDMI cables without issues.
How are the new lossless audio formats via HDMI input handled? E.g. DTS-HD/MA and DD/E-AC3: Are
they stripped down to DTS core or Dolby Digital respectively to fit the requirements of the S/PDIF
standard?
Lossless audio is transmitted through HDMI output. HDfury AVR-Key does not compress or otherwise
downconvert the incoming audio.
Do I need to use the USB power supply?
Yes. Due to the advanced features, the AVR-Key draws more power than previous HDfury models. The
AVR-Key power supply must be used at all times.
Is the AVR-Key power supply the same as that used by the HDfury1, HDfury2, and GammaX?
No. The power supply for the HDfury1, HDfury2 and GammaX kits are 0.5A max current. The HDfury3 is
1A max current. The AVR-Key power supply can supply up to 2.0A. Do not use an HDfury1, HDfury2,
HDfury3 or GammaX power supplies with the AVR-Key.
What sort of power supply does the AVR-Key use?
AVR-Key power supply adheres to these requirements:
- Provides REGULATED (+/- 5%) 5VDC power with 2.0A min DC current
- Delivers the power through a mini usb connector.
Trying to use an AC/DC adaptor that doesn't adhere to these three requirements may destroy the AVR-
Key. Do not use the power supply from the HDfury1, HDfury2, HDfury3 or GammaX with the AVR-Key.
I tried to update my unit, it failed and AVR-Key is shown as USBBOOT under Windows?
Some users are reporting AVR-Key as USBBOOT USBXPRESS under windows after firmware update
attempt. USBBOOT means AVR-Key is in the booltoader state, waiting for the actual FW
It means that the update of MCU FW failed or was not even launched properly or cut in between. That
leaves the device in bootloader ready to accept the FW update again. Make sure the PC Windows GUI is
closed (not running), unplug/replug AVR-Key and launch the FW update again. PC Reboot could be
needed.
Make sure you are using the right Silabs driver for your Windows version and USB port version in use as
per explanations on p.15
