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XM Radio
H E A D S
U P
T E C H N O L
O G I E S
Installation Manual
2.0 PRODUCT DESCRIPTION
The XMR System is a Satellite Digital Audio Receiver (SDAR) entertainment device
intended for use in aircraft passenger cabins. The system receives user selectable
satellite transmitted digital audio programming providing music, news, live sports and
talk shows.
2.1 System Overview
The XMR system consists of multiple component types. Depending on the configuration
of the system, the component types can vary, however all system configurations will
have the minimum components of at least: 1) an antenna, 2) one or more receivers, and
3) a user interface.
The system design is network based to provide single point control of the entire system.
Figure 1 below, illustrates a simple block diagram of the system communications.
Figure 1 – XMR System Networking and Satellite Diagram
2.2 Antenna
The antenna receives the transmission from one or both geo-synchronous orbiting
satellites, which are pointed at the contiguous 48 states of the USA. The antenna is
similar to GPS type antennas, in that it is receive only, low profile in size with a
hemispherical receive pattern, and includes a low noise amplifier (LNA) to boost the
signal through several feet of cable to the receiver. Refer to Section 3.4 for antenna and
cable installation information.
XMR-3
Rev. C, 04/05/06
Page 7 of 31
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