True to the Music
Radial Engineering Ltd.
8ox & 8cx Owner’s Manual
The Radial 8ox features two internal grounding options that
will be of interest to system engineers when integrating the
8ox into complex audio-visual systems. Most users will not
need these options and can accept the factory default set-
tings.
Internal Ground Lift - Each Channel
Each channel’s transformer features an internal ground
switch that re-connects the ground around the transformer.
It may be used on a per-channel basis to accommodate
specifi c grounding needs. For example, it may be neces-
sary to set this switch to closed for devices that have a
fl oating ground like battery powered laptop computers or
devices powered with an AC to DC adaptor.
By default this switch is set to open, or lifted (out position)
so the transformer can decouple equipment connected to
the ISOLATED outputs. Pushing the switch in (closed) will
connected the input signal ground to the output ground at
the ISOLATED output for that channel.
Internal Chassis Ground Lift - All Channels
All tconnectors are 100% isolated from the steel chassis
allowing chassis and signal ground to be kept separate.
However, an single internal switch is provided to connect
the pin-1 cable shields to the chassis without modifying the
8ox. By default, this switch is factory set to open or “lifted”
allowing the chassis to “fl oat” ungrounded.
Should a specifi c grounding scheme require the cable
shields to be bonded to the chassis simply set this switch
to closed (pushed in position). The switch may be accessed
through a small hole in the side of the steel chassis or by
removing the top cover. The chassis ground switch does
not effect the isolation provided by the transformer at the
ISOLATED output.
On the rear panel a ground screw provides a convenient
point to bond the chassis. Use a heavy gauge solid copper
wire to bond the 8ox chassis to your technical ground.
Each channel has a lift switch
directly below the transformer.
Access the internal chassis ground
lift switch through a small hole
in the side of the chassis.
Rear panel chassis screw used
for bonding to technical ground.
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Summary of Contents for 8cx
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