User Guide

On-Site Installer’s Guide - Overview
10
DXP-HT v1.3 - On-Site Installer’s Guide
Adding and Modifying Software
Each time the DXP-HT application is run, it will generate the necessary software files. If changes
are made to any existing software file to modify behavior for job-specific items, the next time DXP-
HT is run the changes will be overwritten.
One of the files created in the project by DXP-HT is CUSTOM.AXI. This file is provided because
all custom software changes made in this file will never be overwritten by the DXP-HT application.
So, for example, if a home theater is added to a DXP-HT-created system, and those changes are
made in CUSTOM.AXI, any changes made down the road via the DXP-HT application will not
affect the home theater code when the files are regenerated.
Sooner or later someone will make a change that gets overwritten so it is worth repeating to avoid
the resulting frustration: If you make changes to any file other than CUSTOM.AXI you are taking it
upon yourself to not use the application for any further updates. Using the application will
overwrite your changes.
In a sense this is one of the nice features of DXP-HT. Because all of the software is made available,
an installer who is a strong NetLinx programmer could use the DXP-HT application as a starting
point. The resulting files could get most of the job complete. Not a bad start! The installer could
then go in and modify the software to be job specific and complete the job, never intending to use
the application again. Conversely, there will be installers who will use the application to do almost
all of the work relying on the CUSTOM.AXI file for any small changes that may be required.
Format of IR Files For Audio Sources
Many of the devices supported by DXP-HT are IR-controlled. AMX has a library of thousands of
IR files for equipment, many of which have been captured to a standard template. DXP-HT uses
this template for its IR codes. In some cases the IR file for new equipment may not have been
captured or is not available for download from the AMX website. Or perhaps the IR file is available
on the web but one or two codes were not captured in the right channels. In these cases it may be
necessary for the installer to capture the IR codes or, at least, modify the IR file.
When capturing or making changes the installer needs to know in which channel each IR code
should reside. If the installer needs to capture an IR remote, or make changes to an IR file, the IR
functions must be captured in the correct channels to work properly with DXP-HT.
The DXP-HT Wizard lets you map the captured IR codes with a list of supported features. Refer to
the DXP-HT Programmer’s Guide for details.