Orban OPTIMOD 6300, Operating Manual

Page: 54 / 255

2-6
INSTALLATION ORBAN MODEL 6300
Connectors

Input and output connectors are XLR-type connectors.
In the XLR-type connectors, pin 1 is CHASSIS GROUND, while pin 2 and
pin 3 are a balanced, floating pair. This wiring scheme is compatible with
any studio-wiring standard: If pin 2 or 3 is considered LOW, the other pin
is automatically HIGH.
Analog Audio Input

Nominal input level between –14dBu and +8dBu will result in normal operation
of the 6300.
(0dBu = 0.775Vrms. For this application, the dBm @600

scale on voltme-
ters can be read as if it were calibrated in dBu.)

The peak input level that causes overload is +27.0dBu.

The electronically balanced input uses an ultra low noise and distortion differen-
tial amplifier for best common mode rejection and is compatible with most pro-
fessional and semi-professional audio equipment, balanced or unbalanced, hav-
ing 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
H
IGH
by the standards of your organization. Connect the black
wire to the pin on the XLR-type connector (#3 or #2) that is considered
L
OW
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 6300 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 6300 input.

If the output of the driving unit is unbalanced and does not have separate
C
HASSIS
G
ROUND
and (–) (or L
OW
) 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 is capable of driving loads of 600

or
higher; the 100% modulation level is adjustable with the
AO 100%
control over
a –6dBu to +24dBu range. The outputs are EMI suppressed.