Eas Test - Orban OPTIMOD 6300 Operating Manual

1-28
INTRODUCTION

EAS Test

MPEG-1 Layer 3 has become a de-facto standard for distribution of non-streaming,
high fidelity audio on the Internet, although aacPlus, as used in Opticodec-PC, is far
more efficient. Orban's OPTICODEC-PC FE is an AAC/aacPlus file encoder application
that can create such efficient files. Thanks to the Apple iPod®, AAC/MP4/M4A is rap-
idly becoming the defacto standard for downloadable music.
OPTIMOD 6300 is well matched to AAC/aacPlus and to MP3. It can effectively pre-
process audio intended for playback from either format. If you decide to use MP3,
choose your MP3 encoder wisely, as not all MP3 encoders are created equal and pro-
vide different levels of quality for a given bitrate.
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 6300.
Note that 6300 processing may not allow the full modulation level as required by
EAS standards. It may therefore be necessary to temporarily defeat the 6300's
processing during the broadcast of EAS tones and data. Placing the 6300 in its
BYPASS Test Mode can defeat the processing. The BYPASS GAIN control sets a
fixed gain through the 6300. See "Test Modes" on page 3-63 for more informa-
tion.
2. Place the 6300 in Bypass mode locally.
A) Navigate to S
ETUP
You can set the bypass gain with the B
right of the M
B) Begin EAS broadcast.
After the EAS broadcast, resume normal processing:
C) Set the M to O
ODE
This will restore the processing preset in use prior to the Test Mode.
3. Place the 6300 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 6300, according to
the wiring diagram in Figure 2-2 on page 2-3.
B) Program two GPI ports for B
in Remote Control Interface Programming starting on page 2-45.
C) Place the 6300 in bypass mode by remote control.
> M and set M
ODE ODE
control.
ODE
PERATE .
and E
YPASS
ORBAN MODEL 6300
to B
YPASS .
G
YPASS AIN control located to the
T
XIT EST according to the instructions