Appendix A – EDID Programmer
105
Instruction Manual – HDMI-UTPRO-0808
10.
Save the connector’s EDID default as a backup (assumes the connector has factory default EDID programming).
Click the Refresh Display List button.
Select the device.
Click the Read button.
Click the Save button (select location, enter file name, and click Save).
11.
Click the Open button to select the .edid file to be written to the HDMI input connector.
12.
Click the Write button to write the EDID information to the HDMI input connector.
13.
If applicable – Repeat any of the steps necessary for any of the other HDMI input connectors.
14.
Disconnect the HDMI cable from the PC and from the HDMI input connector.
15.
Disconnect the serial cable from the PC and from the HDMI UTPro enclosure.
Custom HDMI EDID Files for Handling Audio Concerns
Since an HDMI UTPro will be installed between multiple source and sink devices which often support different video
and audio formats, it is possible that neither the video nor the audio routed by the
HDMI UTPro can be displayed on one or more of the destination devices. Customizing the EDID content at the HDMI
UTPro’s input channels is one way to be sure that the formats provided by the source are compatible with most/all of the
destination devices.
The following files can be found at www.amx.com/products/EDIDLibrary.asp.
The first group of files use 1080p (VIC 16) as the preferred (native) video resolution.
The second group of files use 720p (VIC 4) as the preferred (native) video resolution.
Troubleshooting Example
Problem:
One example is when a source device that selects the highest supported video and audio formats is installed with a sink
whose input is limited to 720p and basic audio. Using the default shipping EDID content would result in 1080p and
possibly either 192 k stereo, Dolby 5.1, or DTS 5.1 audio arriving at the sink when a route was completed through the
HDMI UTPro. The end result would probably be neither video nor audio.
Solution:
To fix this problem, use the EDID Programmer to reprogram the HDMI UTPro input’s EDID to the content supplied in
one of the files listed above. For the example given, the best choice would be the file named
AMX_HDMI1_A1_720p_basicAudio.edid.
File Name
EDID File
Checksum
Monitor Name Description
AMX_HDMI1_A1.edid
8D
AMX_HDMI1_A1 Default shipped EDID content on each
input. Supports audio up to 192 k for
L-PCM, 48 kHz Dolby (5.1), and 48 kHz
DTS (5.1).
AMX_HDMI1_A1_basicAudio.edid
EE
AMX_0300_001
Supports basic audio only
(L-PCM 32 k, 44.1 k, and 48 k).
File Name
EDID File
Checksum
Monitor Name Description
AMX_HDMI1_A1_720p.edid
A2
AMX_0301_002
Supports audio up to 192 k for L-PCM,
48 kHz Dolby (5.1), and 48 kHz DTS (5.1).
AMX_HDMI1_A1_720p_basicAudio.edid
92
AMX_0300_003
Supports basic audio only
(L-PCM 32 k, 44.1 k, and 48 k).
