1-1
STRATA TX Operation Guide
400
Rev.
1
1
Introduction
1.1
Overview
The STRATA Transmitter System provides a reliable and highly flexible portable
microwave system making it ideal for tripod, airborne, or mobile installations. The
STRATA Transmitter’s key features are:
• Analog, Digital, or Analog/Digital Switchable Configurations
• MPEG Encoding (4:2:0, 4:2:2)
• COFDM Modulation with Selectable Guard Interval
• Digital Modulation for QPSK, 16QAM, and 64QAM
• NTSC or PAL Modulation with Audio (4 mono or 2 stereo)
1.1.1
Terms
In this section, note the following abbreviation of terms.
• MPEG – MPEG Encoding
• COFDM – COFDM Modulation
1.1.2
System Components
The system is made of the following components:
• TCU - Transmitter Control Unit – The TCU can be equipped with an FM
Modulator. COFDM/MPEG module, or both. For more information, see
Figure 1-2, STRATA Transmitter Options on page 1-2
.
• TXU - Transmitter Unit – The contains the RF Transmitter Unit. The TXU can
be equipped with an FM Modulator or COFDM/MPEG module, but not both.
For more information, see
Figure 1-2, STRATA Transmitter Options on
page 1-2
.
• HPU - High Power Unit. The HPU is used with the TXU to increase output
power.
• AC Power Supply (optional) - The AC power supply provides DC power from
an AC source to power one or more units in a system.
1.1.3
Single Unit Systems
The TXU or TCU can be used independently as a single unit application:
• The TXU as a stand-alone Transmitter accepting an IF input.
• The TXU as a stand-alone transmitter featuring FM modulation or MPEG &
COFDM.
• The TCU as a separate unit can also be used for FM modulation, MPEG &
COFDM, or both FM modulation and MPEG & COFDM.
1.1.4
Multi--Unit Systems
The TCU, TXU, and HPU can be configured as part of an integrated system.
• The TCU can be used to house the FM Modulator and MPEG/COFDM
module supplying an IF signal to a TXU containing only the RF
transmitter.
• Or the TXU can be used to house the FM Modulator or MPEG/COFDM
module supplying an RF signal to the HPU re-transmitting the signal at a
higher output.
• Further, the HPU can be added to a TCU and TXU as shown in
Figure 1-1
.
• In addition, the TCU can be separated from the TXU and HPU in
applications where the transmitter needs to be located in another location.
Figure 1-1 STRATA Transmitter System
1.1.5
HPU Power Amp
The HPU increases the signal power from 2 and 12 watts depending on the
modulation and format used. The HPU installs as part of an integrated stack
for either tripod or aircraft applications. The HPU is always powered from the
TXU. For more information, see "
Powering the STRATA Transmitter,"
Section 3 on page 3-1
.
The HPU will accept antenna mounts similar to the TXU.
HPU
TCU
TXU
