Orban OPTIMOD-FM 5700i, Руководство по эксплуатации

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OPTIMOD-FM DIGITAL INTRODUCTION
1-27
The front panel headphone jack provides output matching the Analog Output, ex-
cept that it is always de-emphasized (even if the Analog Output is set with pre-
emphasis).
EAS Test
For stations participating in the Emergency Alert System (EAS) in the United States,
broadcast of EAS tones and data can be accomplished in three different ways:
1. Run EAS tones and data through the 5700i.
Note that 5700i processing may not allow the full modulation level as required
by EAS standards. It may therefore be necessary to temporarily defeat the 5700i’s
processing during the broadcast of EAS tones and data. Placing the 5700i in its
BYPASS
Test Mode can defeat the processing. The
BYPASS GAIN
control allows
a fixed gain trim through the 5700i. See “Test Modes,” on page 3-77 for more in-
formation.
2. Place the 5700i in Bypass mode locally.
A) Navigate to Setup > M
ODE
and set M
ODE
to B
YPASS
.
You can set the bypass gain with the B
YPASS
G
AIN
control located to the
right of the M
ODE
control.
B) Begin EAS broadcast.
After the EAS broadcast, resume normal processing:
C) Set the
M
ODE
to
O
PERATE
.
This will restore the processing preset in use prior to the Test Mode.
3. Place the 5700i in Bypass mode by remote control. Then program any
two Remote Interface inputs for “Bypass” and “Exit Test,” respectively.
A) Connect two outputs from your station remote control system to the
REMOTE INTERFACE connector on the rear panel of the 5700i, according to
the wiring diagram in Figure 2-2 on page 2-3.
B) Program two GPI ports for
B
YPASS
and
E
XIT
T
EST
according to the instructions
in Remote Control Interface Programming starting on page 2-43.
C) Place the 5700i in bypass mode by remote control.
a) Switch the 5700i into
BYPASS
mode by a momentary command from your
station’s remote control to the GPI port programmed as
B
YPASS
.
b) Begin EAS broadcast.
c) When the EAS broadcast is finished, switch the 5700i from
B
YPASS
mode by
a momentary command from your station’s remote control to the GPI port
programmed as
E
XIT
T
EST
.