2-28
INSTALLATION
ORBAN MODEL 8300
If you are using program material, make sure that the program material
is loud enough to produce peaks of frequent recurrence that hit the
8300’s peak limiting system, thereby defining the maximum peak level
that the 8300 will produce. In the U.S., we recommend using 900
s peak
weighting on the peak modulation indicator, as permitted by F.C.C. rules.
This will cause the monitor to ignore very low energy overshoots and will
result in the highest peak modulation permitted by law.
In other countries, use a peak-indicating instrument as specified by the
regulatory authority in your country.
If you are required to implement the average modulation limits specified
by ITU-R 412-9, you may seldom see peaks hitting
75 kHz deviation. In
this case, we advise you to set the output level by using the 8300’s refer-
ence 400Hz tone.
In the United States, F.C.C. Rules permit you to add 0.5% modulation for
every 1% increase in subcarrier injection. For example, if your subcarrier
injection totals 20%, you can set the total modulation to 110% (
82.5
kHz deviation). This implies that you must set the 8300’s composite out-
put level for the equivalent of 90% modulation, not counting the subcar-
riers. (90% + 20% = 110%.) The pilot injection will thus be about 8%
modulation instead of the desired 9%. Adjust the
S
ETUP
/
S
TEREO
E
NCODER
/
N
EXT
/
P
ILOT
L
VL
control as necessary to produce 9% modula-
tion (
6.75 kHz deviation). This will ordinarily require you to set the
P
ILOT
L
VL
parameter to “10%.”
8.
Set digital output and configuration level.
[Skip this step if you will not be using the digital output.]
[See the notes immediately above.]
A)
Navigate to
S
ETUP
/
IO
C
ALIB
/
D
IG
O
UT
C
ALIB
.
B)
Set the
DO
P
RE
-E
control to
P
RE
-E
(for pre-emphasis),
P
RE
+J17
,
J.17
or
F
LAT
.
C)
Set the
DO
R
ATE
to 32, 44.1, 48, 88.2, or 96 kHz.
The 8300’s fundamental sample rate is always 32 kHz, ensuring that the
output bandwidth is always strictly limited to 16 kHz and that the proc-
essed signal can be passed through a 32 kHz uncompressed STL without
addition of overshoot. However, the internal sample rate converter sets
the rate at the 8300’s digital output. This adjustment allows you to set
the output sample rate to ensure compatibility with equipment requiring
a fixed sample rate.
D)
Set the
DO
S
YNC
.
You can choose
I
NTERNAL
(the output sample rate is synchronized to the
8300’s internal crystal-controlled clock) or
E
XTERNAL
(the output sample
rate is synchronized to the sample rate appearing at the 8300’s AES3 in-
put).
E)
Press
N
EXT
. Then set the desired output
W
ORD
L
EN
(word length).
[14], [16], [18], [20], or [24], in bits
The largest valid word length in the 8300 is 24 bits
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...
