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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
2.3 Receiver
This component is manufactured in 4 types, having 1, 2, 4 or 8 individual SDAR modules
or "receiver channels". It is a multiple micro-processor based electronic device which
decodes the digital satellite signal and provides an analog stereo audio output(s) to the
listener(s).
The receiver, depending on the number of tuner modules, distributes the single antenna
input feed with an internal RF splitter to each module. On the XMR400, XMR800 and
Heads Up XM WX data receivers, an internal RF splitter incorporates an output to "daisy
chain" additional Heads Up receiver components. Please refer to the Section 3.0 for
more information.
The receiver is intended as a remote mounted device and requires a user interface to
control the functions such as channel selection, volume settings, etc. Figure 2 below
provides an illustration of the 4-channel receiver (XMR400).
Figure 2 - XMR Interface Layout (XMR400 shown)
XMR-3
Rev. C, 04/05/06
Page 8 of 31
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