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2-16
INSTALLATION
Analog Audio Monitor Output
AES3 Digital Input and Output
The electronically balanced input uses an ultra low noise and distortion differential
amplifier for best common mode rejection. It is compatible with most professional
and semi-professional audio equipment, balanced or unbalanced, having a source
impedance of 600Ω or less. The input is EMI suppressed.
•
Input connections are the same whether the driving source is balanced or unbal-
anced.
•
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 organization.
•
In low RF fields (like a studio site not co-located with an RF transmitter), connect
the cable shield at OPTIMOD-PC 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 source driving OPTIMOD-PC.
•
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.
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 peak output level is adjustable up to +20dBu before clipping occurs. The out-
puts are EMI suppressed.
•
If an unbalanced output is required (to drive unbalanced inputs of other equip-
ment), 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 OPTIMOD-PC'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 organization.
There are two AES3 inputs and two AES3 outputs. With v1.0 software, the two out-
puts emit the same signal. Both inputs accept program audio and can be mixed; ei-
ther input can also accept AES11 house sync. The program inputs and output are
both equipped with sample rate converters. The output can operate at 32, 44.1, 48,
ORBAN MODEL 1101
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