Radial Engineering OX8, User Manual

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True to the Music
Radial Engineering Ltd.
OX8
™
User Guide
FEATURES
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1. Locking XLR Inputs - Front panel female XLR jacks allow
easy connection of individual signals. Rugged, glass-
reinforced nylon construction for reliable connections.
2. PAD -36dB - Reduces level-level input signals to
microphone-level, allowing them to be run alongside mic
signals without crosstalk. Only the ISOLATED output is
affected by the PAD.
3. Front Panel Lift Switch - Disconnects the ground path at
the DIRECT WITH GROUND LIFT auxiliary output. Using
the front panel ground lift can eliminate ground loop noise
between equipment connected to the OX8 direct outputs.
4. Easy ID label zones
- For dry-erase markers or wax pencil
identification. Handy when using several OX8 at a time.
5. Internal Chassis Ground Lift - Input connectors are
100% isolated from the chassis, but an internal switch is
provided to connect signal ground (pin-1) to the chassis
without modifying the OX8. By default, this switch is factory
set to “lifted” allowing the chassis to “float” ungrounded and
should remain this way unless a specific grounding scheme
requires the signal ground to be tied to the chassis.
6. Military Grade PCB - The dual layer circuit board is
manufactured with plated through holes and secured with
8 standoffs.
7. Transformers - Each transformer is mounted directly on
the PCB in close proximity to the input for the shortest
possible signal path. Choice of standard Eclipse or optional
Jensen transformers.
8. Heavy-duty Switches - Front panel switches are metal
encased and rated at 20,000 operations.
9. Internal Ground Lift - Each channel features an internal
switch that, by default, is set to “lifted” so the transformer
can isolate ground potential voltages. It may be used by
system designers to accommodate specific grounding
schemes when desired.
10. 14-Gauge Chassis - Made extra tough with heavy gauge
steel and welded corners to provide excellent shielding and
durability. Finished in baked enamel.
11. Isolated Output - This output is transformer isolated to
block noise caused by ground loops and is wired in parallel
to DB-25 and Euroblock terminals.
12. Direct With Ground Lift - This is an auxiliary output wired
in parallel with the DIRECT output. The signal grounds
may be disconnected using the front panel LIFT switch.
This output is wired parallel to the DB-25 and Euroblocks
terminals.
13. DB-25 Pin-out Diagram - The pin-out for the female DB-
25 connector is diagramed on the rear panel. All DB-25
connectors follow the Tascam standard for eight channel
analog signal interface.
14. Euroblock Sockets - These panel sockets receive 12-pin
Euroblock screw terminals. Each Euroblock connects four
channels with bare wire termination and facilitate custom
options like interfacing a connector panel or multi-pin
disconnect. Euroblocks screw terminals are optional and
must be ordered separately. (Radial order # R800 8050)
15. Direct Output - This output passes signal through the
OX8 and provides the return path for phantom power.
This output is wired parallel to the DB-25 and Euroblock
terminals.
16. Rear Inputs - The rear panel DB-25 and Euroblock inputs
connect all eight channels and are wired parallel to the
front XLR connectors.
17. Chassis Ground - Ground screw connection point used in
conjunction with the internal chassis lift switch to bond the
OX8 to earth.