Orban OPTIMOD 8400 - AES;EBU DIGITAL INPUT AND OUTPUT

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INSTALLATION ORBAN Model 8400
• In low RF fields (like a studio site), connect the cable shield at 8400 input only—it
should not be connected at the source end. In high RF fields (like a transmitter site),
also connect the shield to pin 1 of the male XLR-type connector at the 8400 input.
• If the output of the driving unit is unbalanced and does not have separate CHASSIS
GROUND and (–) (or LOW) output terminals, connect both the shield and the black
wire to the common (–) or ground terminal of the driving unit.
Analog Audio Output
• Electronically balanced and floating outputs simulate a true transformer output. The
source impedance is 50Ω. The output is capable of driving loads of 600Ω or higher;
the 100% modulation level is adjustable with the Analog
Out Level control over a
–6 dBu to +24 dBu range. The outputs are EMI suppressed.
• If an unbalanced output is required (to drive unbalanced inputs of other equipment),
it should be taken between pin 2 and pin 3 of the XLR-type connector. Connect the
LOW pin of the XLR-type connector (#3 or #2, depending on your organization’s
standards) to circuit ground, and take the HIGH output from the remaining pin. No
special precautions are required even though one side of the output is grounded.
• Use two-conductor foil-shielded cable (Belden 8451, or equivalent).
• At the 8400’s output (and at the output of other equipment in the system), do not
connect the cable’s shield to the CHASSIS GROUND terminal (pin 1) on the XLR-
type connector. Instead, connect the shield to the input destination. Connect the red
(or white) wire to the pin on the XLR-type connector (#2 or #3) that is considered
HIGH by the standards of your organization. Connect the black wire to the pin on the
XLR-type connector (#3 or #2) that is considered LOW by the standards of your or-
ganization.
• The 8400HD (“High Definition Digital Radio”) option adds a second stereo pair of
analog outputs, switchable between the low-latency “monitor” signal and the HD-
processed signal.
AES/EBU Digital Input and Output
In a standard 8400, there are two AES/EBU inputs and one AES/EBU output. One input
accepts program audio; the other accepts house sync. The program input and output are
both equipped with sample rate converters and can operate at 32, 44.1, and 48 kHz.
Per the AES/EBU standard, each digital input or output line carries both the
left and right stereo channels.
The digital input clip level is fixed at 0 dB relative to the maximum digital
word. The maximum digital input will make the 8400 input meters display 0