Orban OPTIMOD-FM 8600, Руководство по эксплуатации

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2-42
INSTALLATION ORBAN MODEL 8600
iter. Then save the result as a User Preset. We recommend allowing the
BS.1770 Safety Limiter to produce no more than 3 dB of gain reduction.
BS.1770-3 is an imperfect metric. It has been established by listening tests
that BS.1770-3 can over-indicate loudness by 3 dB or more when the pro-
gram material has an unusually low peak-to-RMS ratio because of pro-
duction techniques, dynamic compression, etc. Whenever the BS.1770
meter would otherwise read above 0 LU, the BS.1770 Safety Limiter pro-
duces gain reduction that is the inverse of the BS.1770 meter’s reading.
Hence, the Safety Limiter can cause such material to be unnaturally quiet
sounding compared to speech or other program material with higher
peak-to-RMS ratios, so we recommend using as little gain reduction as
possible in the BS.1770 Safety Limiter. We believe that the Optimod pro-
cessing sounds most natural with no BS.1770 limiting at all, so you should
only use it if government regulations in your country require it.
D) If you are using the analog FM processing chain’s BS.1770 Safety Limiter
and/or its MPX Power Controller, you must adjust the
M
ULTIPLEX
P
OWER
O
FFSET
control to obtain an appropriate amount of gain reduction. See step 13 on
page 2-25.
Using Clock-Based Automation
1. If you have not already done so, set the system clock.
If you can connect your 8600 to the Internet through its Ethernet port, you can
then specify an Internet timeserver to set your 8600’s clock automatically. In ad-
dition, Optimod PC Remote software can automatically set your Optimod’s local
time,
O
FFSET
,
and
T
IME
S
ERVER
to reflect the Windows settings in the machine
running PC Remote software. See Synchronizing Optimod to a Network Time
Server on page 2-69. If you are planning to set your Optimod’s time via PC Re-
mote and/or the Internet, skip to step (C).
A) Navigate to
S
YSTEM
S
ETUP
> P
LACE
/ D
ATE
/ T
IME
.
B) Navigate to the
T
IME AND
D
ATE
screen.
a) Choose
T
IME
F
ORMAT
as desired (either 24-hour time or AM / PM-style time).
b) Set hours, minutes, and seconds, in that order.
Seconds will stop advancing when you set hours and minutes. So set sec-
onds last.
c) Choose the desired date format.
d) Set today’s date.
e) If you want the clock to automatically reset itself to conform to Daylight
Saving Time (Summer Time), use the
B
EGINS
and
E
NDS
fields to specify when
Daylight Saving Time begins and ends in your area. If you do not wish to
use this feature, leave any
B
EGINS
and
E
NDS
field
O
FF
.
C) (Optional) > Navigate to the
S
TATION
screen to specify your station’s identifier
(call sign or call letters).