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Exporter Plus Technical Instruction Manual
Description
Issue 1.0 2020-05-05
Page 1-1
Section 1:
Description
This section provides a description of the Exporter Plus and its associated digital radio system.
•
•
•
Managing network traffic - see page 1-4
•
Diversity delay - see page 1-8
•
Physical requirements - see page 1-9
•
Cooling requirements - see page 1-10
Overview
.
The Exporter Plus represents the latest in HD Radio Exporter technology. It has the same
functionality as an Exporter, but in a smaller, more reliable and convenient package. The
Exporter Plus accepts
AES/EBU
-format audio from an audio processor. In FM systems, the
Exporter Plus will also accept program service data (
PSD
) for the main program service (
MPS)
audio and
Advanced Application Service
data from an Importer via the Ethernet port. The
MPS
audio is coded and merged with
PSD
and Importer data to create a single data stream that is
delivered to the FM exciter, also over the Ethernet port.
A secondary function of the Exporter Plus is to provide a delayed copy of the
MPS
audio. The
delayed
MPS
will become the analog component of the hybrid broadcast. The delay is
necessary for smooth blending between the digital
MPS
audio and analog
MPS
audio in areas of
poor reception. As a result, the Exporter Plus requires two
MPS
audio feeds, one of which is
simply delayed, and the other which is coded for eventual transmission on the
IBOC
carriers. In
an FM system, the delayed
MPS
audio is output as 44.1 kHz
AES/EBU
. In an AM system, the
delayed
MPS
audio is part of the IP data stream. See
“Managing network traffic” on page 1-4
more information.
The Exporter Plus provides an
AES/EBU
output on the back panel and a headphone jack on the
front panel for monitoring of the audio content.
The front panel has a convenient user interface consisting of an LCD graphic display, keypad
and LEDs to indicate operational status. All connections are made to the back panel.
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