6-1
STRATA TX Operation Guide
400
Rev.
6
6
Audio & Video Connections
6.1
Overview
The STRATA Transmitter system provides a variety of configurations for
transporting audio and video signals. The STRATA Transmitter provides options
for separate audio and video input as well as analog composite and embedded
digital formats.
6.1.1
Glossary
The following terms are used in this section:
• Audio circuit – One 3 wire balanced circuit capable of carrying one tone or
voice signal. An audio circuit can carry:
– 1 analog balanced audio channel or:
– 2 digital AES/EBU channels
The STRATA Transmitter provides for a maximum of 4 audio circuits:
• Analog – 4 monaural or 2 stereo channels carried on 4 XLR connectors
• AES/EBU – 2 digital channels carried on one XLR connector – 4 digital
channels carried on two XLR connectors.
6.2
Factory Settings
Audio inputs and outputs are factory configured in two ways:
• Software setup specifically set up each customer needs and hardware
configuration. See "
STRATA Tx Configurator," Section 5 on page 5-1
.
• Hardware Configuration - This involves cabling options from the front panel
audio connector to the FMT or MPEG modules. Cabling options are
configured by the customer order. See
Section 6.5, "Audio Configurations," on
page 6-2
.
6.3
Audio Input
6.3.1
FMT Audio Input
Analog can be input to the system in the following ways.
• Analog audio as part of a composite video input to the transmitter.
• 4 separate analog channels connected to the front panel audio connector.
In a TCU with both MPEG and FMT modules installed, 4 analog audio channels
are connected in series to the FMT and then COFDM modules.
6.3.2
MPEG Audio Input
Audio circuits must be configured in pairs:
• Audio A - Channels 1 & 2
• Audio B - Channels 3 & 4
To configure audio channels, see "
STRATA Tx Configurator," Section 5 on
page 5-1
.
6.3.3
AES/EBU Audio Input
The STRATA Transmitter can be configured to input AES/EBU audio. This
requires the transmitter to be configured at the factory, or the unit must be
upgraded by MRC Technical Services. For audio connections, see
Table 6-4
on page 6-5
.
6.4
Audio and Video Set Up
Step 1
Identify the audio configuration for your radio based on the option
modules installed according to the customer requirements as stated
in the order. See
Section 6.5, "Audio Configurations," on page 6-2
.
Step 2
Determine the audio input connection, whether to the TCU or TXU.
System s where the TXU and TCU are co-located have the audio
connection made to the TCU.
For TXU Connections, see
Section 6.6, "TXU Audio & Video
Connections," on page 6-3
.
For TCU Connections, see
Section 6.7, "TCU Audio & Video
Connections," on page 6-4
.
Step 3
If the audio is being input separately to the system, use the wiring
instructions found in
Table 6-4 on page 6-5
. MRC provides an audio
cable with 4 XLR connectors as shown in
Figure 6-6, Audio XLR
Cable (907471) on page 6-6
.
