Orban OPTIMOD-FM 8600, Operating Manual

Page: 94 / 397

2-34
INSTALLATION ORBAN MODEL 8600
You can use either program material or tone to set your output level
(and thus, your on-air modulation). If you want to use tone, turn the
400Hz calibration tone on.
B) Set the
A
NALOG
O
UT
S
OURCE
to
FM
or
FM+D
ELAY
, depending on whether you
need to apply diversity delay to that source. See Diversity Delay on page 2-74.
Be aware that this setting can be toggled between
FM
and
FM+D
ELAY
by
several means in addition to the
A
NALOG
O
UT
S
OURCE
control in the
I
NPUT
/
OUTPUT
> O
UTPUT
1
screen. These additional means include the 8600’s
GPI inputs (page 2-60), its serial ports (page 2-48), its Ethernet input (via
8600 PC Remote or a terminal program), and its clock-based automation
(page 2-42).
C) Set the
A
NALOG
O
UTPUT
P
RE
/ F
LAT
control to
P
RE
-
E
(for preemphasis) or
F
LAT
.
[Skip this step if you will not be using the analog output.]
If you will use the analog output to drive a stereo encoder,
P
RE
-
E
pro-
vides the best performance because this stereo encoder does not have to
restore the preemphasis. However, if you cannot defeat the preemphasis
in your stereo encoder or if you will use the analog output for monitor-
ing, set the output
F
LAT
.
If you are sending the analog output of the 8600 through a digital link
that uses lossy compression (like MPEG, APT-X, or Dolby), set the output
F
LAT
.
Lossy codecs cannot handle pre-emphasized signals.
[Skip steps (D) through (I) if you will not be using the”AES1” digital
output. Note that both the “AES1” and “AES2” digital outputs have
identical functionality, so you could use either one in the steps below.]
D) Set the
AES1 O
UT
S
OURCE
control to the desired source:
FM
,
FM+D
ELAY
,
HD
, or
M
ONITOR
.
•
In most facilities, you will set it to
FM
.
•
HD
is not available in 8600FM units.
E) Set the
AES1 P
RE
/F
LAT
control to
P
RE
-
E
(for preemphasis),
F
LAT
,
or
P
RE
-
E
+J17.
•
See the notes immediately above.
•
P
RE
-
E
+J17
applies both FM preemphasis and J.17 preemphasis (in cas-
cade) to the signal and is only used with STLs using J.17 preemphasis
when their own J.17 preemphasis filters are bypassed. These are rare.
F) Set the
AES1
output
S
AMP
R
ATE
(sample rate).
[32], [44.1], [48], [88.2], or [96], in kHz
The 8600’s base sample rate is always 64 kHz, but the internal sample rate
converter sets the rate at the 8600’s digital output. This adjustment sets
the 8600’s output sample rate to ensure compatibility with equipment
requiring a fixed sample rate.
G) Adjust the
AES1 SR SYNC
control.
[Internal / Sync In / Input]