Enova DGX DXLink™ Twisted Pair Boards
95
Hardware Reference Manual – Enova DGX 100 Series Digital Media Switchers
Serial Data Transfer and IR Flow Control
The illustration in FIG. 50 shows the bidirectional serial data transfer and IR flow control when an Enova Digital Media Switcher is
used with DXLink Modules connected to both input and output boards. The switcher has an integrated NetLinx NX Central Control
Processor which provides native AMX control at each remote location fed by a DXLink Transmitter or Receiver. Control is sent over
twisted pair cable (via the DXLink ports).
DXLink Twisted Pair / DXLink Twisted Pair 4K Compatibility
By default, DXLink 4K Input Boards provide a 4K EDID to all connected DXLink Transmitter devices. While DXLink Transmitters are
supported by the DXLink 4K Input Board, the default EDID provided to the Transmitter may result in a source device (computer,
media player, etc) presenting a video resolution out of the Transmitter's range. To ensure the source device presents a resolution
the DXLink Transmitter can support, simply use the Enova DGX 100 Series System Configuration interface to select a non-4K EDID
(All, Wide, Full in non-4K range) to ensure a supported format is requested by the DXLink Transmitter.
Some older DXLink Twisted Pair Receivers are not compatible with DXLink Twisted Pair 4K Output Boards. Receiver and DXLink
Twisted Pair 4K Output Board compatibility are established through:
In NetLinx Studio – If the Receiver is referenced as “DXLINK-HDMI-RX.c” (ends in “.c”), the Receiver is incompatible. Receivers
with the suffix “.e” are fully compatible with DXLink Twisted Pair 4K Output Boards.
On the physical endpoint – If the Receiver has a date code of less than 26D (e.g., 1010500AP18C0034 has a date code of 18C),
the Receiver is incompatible. Receivers with a date code of 26D or greater (e.g., 1010500AP27E0034) are fully compatible with
DXLink Twisted Pair 4K Output Boards.
NOTE: Compatibility is available between DXLink Twisted Pair equipment and DXLink Twisted Pair 4K equipment (see the “DXLink
Compatibility” Appendix in the “DXLink Twisted Pair 4K Transmitters and Receivers Hardware Reference Manual” at www.amx.com).
Troubleshooting Audio
Audio not present or intermittent with good video
Likely Cause:
A signal containing both video and audio must have space for both signal portions. The audio signal portion lies in the blanked
portion of the video signal. High Bit Rate Audio (HBRA) requires a larger than normal space in the blanked area of the signal. Video
formats with reduced blanking normally provide enough space for audio signals. In a signal that combines a video format with
reduced blanking and HBRA, the HBRA signal is truncated and can present as either no audio or as problematic audio (static,
clicking, absent, etc.). While Enova DGX hardware supports both HBRA and reduced blanking video formats, these formats do not
necessarily work with one another.
Possible Solution:
Change either the audio format to non-HBRA or change the video format to a format that does not use reduced blanking.
FIG. 50
Serial data transfer and IR flow control
DXLink
Enova DGX 1600
IR and/or
RS-232
DXLink RX
HDMI
HDMI
IR and/or
RS-232
DXLink TX
DXLink
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