Troubleshooting
84
Hardware Reference Manual – DXLink™ Twisted Pair Transmitters/Receiver
Important Power Considerations for Enova DGX Systems
Local power – Local power (the desktop power supply) always takes precedence over power via the DXLink line from the
switcher. However, if a locally powered module is connected to a switcher and the local power is lost (i.e., unplugged or
turned off), the module will power down and then automatically power back up using power from the switcher via the
DXLink connection (increasing the overall power draw on the switcher). When local power is restored, it automatically
replaces the power over the DXLink line.
DXLink power – When Transmitters/Receivers are being powered by an Enova DGX DXLink board or DXLink power injector
(using power via the DXLink line), to maintain the switcher’s power redundancy, we recommend that you:
Determine the power budget based on the Input/Output boards used and the quantity of powered endpoints
(Transmitters/Receivers); see page 31.
Do not use the local DC power jack on the module (even if the local power adapter is turned off).
Power Issues with Enova DGX Systems
In an Enova DGX System when multiple endpoints (Transmitters/Receivers) cycle their power and the DXLink connection fails,
check the following:
Check to be sure that Transmitters/Receivers being powered by the local DC jack have power. (Local power always takes
precedence.)
Check to be sure that Transmitters/Receivers intended to be powered via the DXLink line do not have a DC jack plugged in (even
if the local power adapter is turned off). This can cause inadvertent ground loops that can negatively affect DXLink power
sensing circuits.
DXLink Connection Issues
One method for determining DXLink connection issues is to compare the pattern of the green and yellow DXLink LEDs on the
Transmitter or Receiver against the tables below and then check the suggested items in the Troubleshooting column in the second
table.
DXLink LED Patterns When Connection is Working as Expected
Check the status of the green and yellow DXLink LEDs (on rear of the modules – on lower edge of the Wallplate TX, or on the front
of the Decor Wallplate TX – under customer provided standard decor style cover plate) against the following table to determine the
status of the video signal over the DXLink line. All of the green / yellow patterns in this table indicate that the unit is working as
expected given its current connections. If the LED pattern does not correspond to any of the green / yellow patterns in this table,
check the table below.
LED Patterns – Working as Expected
Green
Yellow
LED Pattern Description
Solid green
Solid yellow
The DXLink link is established and the video stream is passing HDCP protected content.
Solid green
Flashing yellow
The DXLink link is established and the video stream is passing unprotected content.
Solid green
Off
The DXLink link is established but no video content is being passed.
Off
Off
The DXLink link is not established and the accompanying DXLink unit is not powered on or is
not connected.
