OPTIMOD-FM DIGITAL
INSTALLATION
2-7
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 –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), it should be taken between pin 2 and pin 3 of the XLR-type connector.
Connect the
L
OW
pin of the XLR-type connector (#3 or #2, depending on your
organization’s standards) to circuit ground; take the
H
IGH
output from the re-
maining 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 8300’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
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.
AES3 Digital Input and Output
There is one AES3 input and one AES3 output. The program input and output are
both equipped with sample rate converters and can operate at 32, 44.1, 48, 88.2,
and 96 kHz. The AES3 output can be switched to emit either the FM processed or HD
(digital radio/netcast) processing signal. (See step (8.J) on page 2-29.)
Per the AES3 standard, each digital input or output line carries both the
left and right stereo channels. The connection is 110
balanced. The
AES3 standard specifies a maximum cable length of 100 meters. While
almost any balanced, shielded cable will work for relatively short runs (5
meters or less), longer runs require used of 110
balanced cable like
Belden 1800B, 1801B (plenum rated), multi-pair 180xF, 185xF, or 78xxA.
Single-pair category 5, 5e, and 6 Ethernet cable will also work well if you
do not require shielding. (In most cases, the tight balance of Category
5/5e/6 cable makes shielding unnecessary.)
The AES3id standard is best for very long cable runs (up to 1000 meters).
This specifies 75
unbalanced coaxial cable, terminated in BNC connec-
tors. A 110
/75
balun transformer is required to interface an AES3id
connection to your Optimod’s digital input or output.
Summary of Contents for 8300J
Page 1: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
Page 7: ...Operating Manual OPTIMOD FM 8300 Digital Audio Processor Version 2 1 Software...
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Page 247: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 29...
Page 254: ...6 36 TECHNICAL DATA ORBAN MODEL 8300 CPU Module...
Page 260: ...6 42 TECHNICAL DATA ORBAN MODEL 8300 8300 RS232 BOARD PARTS LOCATOR...
Page 262: ...6 44 TECHNICAL DATA ORBAN MODEL 8300 8300 POWER SUPPLY PARTS LOCATOR...
Page 264: ...6 46 TECHNICAL DATA ORBAN MODEL 8300 8300 I O BOARD PARTS LOCATOR...
Page 270: ...6 52 TECHNICAL DATA ORBAN MODEL 8300 DSP BOARD PARTS LOCATOR DRAWING 32170 000 14...
Page 278: ...6 60 TECHNICAL DATA ORBAN MODEL 8300 8300 DISPLAY BOARD PARTS LOCATOR...
Page 279: ...OPTIMOD FM DIGITAL TECHNICAL DATA 6 61 DISPLAY BOARD...