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H E A D S
U P
T E C H N O L
2.4 User Interface
The user interface can consist of different types depending on the users requirements.
Three main interface types are supported by the receiver(s): 1) the HUT XMC Control
Head, 2) data interface to a Cabin Entertainment Management System (CEMS) and 3) a
custom built device that utilizes the receivers discrete control inputs.
2.4.1
Control Head
The Heads Up XMC series control head is a microprocessor based device which
incorporates a touch-screen Liquid Crystal Display (LCD) with full color graphics. The
XMC and receiver(s) communicate through a multi-node data bus (RS-485) to transmit
and receive commands, XM channel information and other status data.
User control of the XM system receivers is provided by this device through the use the
touch-screen display. In addition, the XMC also includes an optical LED remote control
sensor (interface to an external sensor is also provided) for use with the HUT XMR100-
Remote Control Devices.
2.4.2
Cabin Entertainment Management System (CEMS)
The receiver incorporates several communication interconnects to interface with a
CEMS to send channel change commands and receive channel information. Standard
HUT CEMS command protocol interfaces have been developed for general use. 3
party proprietary protocols are also implemented for interface to those parties CEMS
equipment only.
For more information on interfacing a CEMS to a XMR system, contact Heads Up
Technologies customer support via email at info@heads-up.com.
2.4.3
Discrete Control Inputs
Two types of discrete control inputs are available:
Main Interface Inputs
The J1 interface of the XMR includes a PA-key input to mute the system and
configuration-strap type inputs that allows the installer to configure the operation of the
XMR at power-up. Refer to Section 3.5.2 for more information.
Receiver Channel Interface Inputs
Discrete inputs (active ground) are included on each receiver channel for user XM
programming control to scroll (Up or Down) through each channel, category and channel
preset. These inputs are intended to be used in conjunction with a XMC since these
inputs only provide limited functionality. Please note, presets can not be set with these
inputs.
These inputs would typically be connected to an installer fabricated switch panel
mounted near a passenger seating area. An example is illustrated in Figure 3 below.
1
Data protocol definition required, contact product support services.
XMR-3
Rev. C, 04/05/06
O G I E S
XM Radio
Installation Manual
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