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USB AND POWER CONNECTIONS
The Agility Zero U unit is designed to be as flexible as possible. It can either operate using an optional external power adapter
(see page 3) or derive all of its power from its two USB plugs. The main advantage offered by using an external power adapter
is that it allows the Agility Zero U unit to be active before the host computer; thus allowing a remote user to access the host’s
initial boot up and access the BIOS menu, when required.
If powered by USB only, then both the black and red USB plugs need to be connected.
If powered by external power adapter, only the black Hi-Speed USB plug needs to be connected, for signal purposes. Whenever,
the external power adapter is attached and operating, then power will be taken from it rather than the USB plugs. There is no
problem if the red USB plug remains connected while the power adapter is used.
This is summarized as follows:
Power Black Red
adapter USB USB Power sourcing behavior
ûüüPower taken from both USB plugs.
üüûPower taken from power adapter only.
üüüPower taken from power adapter only, unless it becomes unavailable, in which case power will
be taken from both USB plugs after a short interruption.
Note: The USB plugs do not operate as a seamless failover for the external power adapter; there will be a short interruption as
operation switches from one power source to the other.
SUPPORT FOR AUDIO
The Agility Zero U can derive its (digital) audio feed
either from the USB connection or from the video
link (i.e. embedded audio within the DisplayPort/
HDMI signal). In both cases, the digital audio is
converted to analog as it is transferred to the
receiver(s), where it is output via their 3.5mm
jack(s). The two audio sources are controlled from
the System Configuration page of the internal utility
(see page 20) as follows:
• When the Enable Audio-1 option is checked, the
Agility Zero U arranges a bi-directional audio
stream with the host computer via the USB
connection.
• When the Enable Audio-2 option is checked,
the EDID definition of the DisplayPort or HDMI
connection will be altered to permit a uni-
directional audio stream via the video output.
This allows the use of embedded audio, even
when the video display itself does not support
audio.
Note: It is possible for both options to be enabled
at the same time without issue.
Host computer
USB ports
Black USB plug
provides USB signals
(plus power if the ex-
ternal power adapter
is not present)
Red USB plug provides power
only when the external power
adapter is not present
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From the optional
external power
adapter