Orban Optimod-FM 8300 Operating Manual page 75

OPTIMOD-FM DIGITAL
d) Set T
ONE
e) Press the N
f) Set T
ONE
g) Verify that P
h) When you have finished with the tone, set the M
E) If you are required to meet the requirements of ITU-R 412-9 in your country,
activate the 8300's ITU-R 412 controller. See step 20 on page 2-22.
F) You can specify the amount by which the 8300 automatically reduces main
and stereo subchannel modulation to accommodate subcarriers within the
modulation limits specified by the governing authority. See step 21 on page 2-
23.
7. Set analog output and configuration level.
A) Navigate to S
put pre-emphasis to P
If you will use the analog output to drive a stereo encoder, P
vides the best performance because the stereo encoder does not have to
restore the pre-emphasis. However, if you cannot defeat the pre-
emphasis in your stereo encoder or if you will use the analog output for
monitoring, set the output F
If you are sending the analog output of the 8300 through a digital link
that uses lossy compression (like MPEG, APT-X, or Dolby), set the output
Flat . Lossy codecs cannot handle pre-emphasized signals.
If you are going to use the analog output for headphone monitoring [see
step (C) below], set the output F
B) 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 on the 400Hz
calibration tone.
See step (6.D) on page 2-26 for instructions on how to turn on the cali-
bration tone.
C) Using the AO F
.
M
ONITOR
See step 10 on page 2-18.
If have set the source to Monitor, be sure to set analog pre-emphasis to
Flat. See step (A).
D) Using the AO 100% button, set the desired analog output level corresponding
to 100% modulation, using units of dBu (0 dBu = 0.776 Vrms).
The most accurate way to set this control is by observing a modulation
analyzer connected to your transmitter.
If you have (inappropriately) set AO F
peak level will not be well controlled because no peak limiting has been
applied to this signal.
L to 100%.
VL
key.
EXT
C to L+R.
HAN
is O .
ILOT N
/ IO C / A
ETUP ALIB NLG
- (for pre-emphasis) or F
RE E
LAT
button, set the analog output source to X
EEDS
to O
ODE
-E. Set the analog out-
O C / AO P
UT ALIB RE
.
LAT
.
.
LAT
in step (C) above, the
: M
EEDS ONITOR
INSTALLATION
.
PERATE
- pro-
RE E
or
MITTER
2-27