INSTALLATION
2-7
The electronically balanced input uses an ultra low noise and distortion differen-
tial amplifier for best common mode rejection. It is compatible with most profes-
sional and semi-professional audio equipment, balanced or unbalanced, having
a source impedance of 600
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), connect the cable shield at 8700i 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
8700i 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 50
. The output can drive loads of 600
or higher; the
Analog
O
UT
L
EVEL
control adjusts the 100% modulation level 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 equip-
ment), take it 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 8700i’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. Con-
nect 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.
Summary of Contents for OPTIMOD-FM 8700
Page 1: ...Operating Manual OPTIMOD FM 8700i Digital Audio Processor Version 1 1 Software...
Page 7: ...Operating Manual OPTIMOD FM 8700i Digital Audio Processor Version 1 1 Software...
Page 29: ...and HD processing 3 15 controls 3 38 description of 3 10 Xponential Loudness 1 6...
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