Supported Number Of Sinks; Hdcp Source Device; Enova Dgx Switcher; Unsuccessful Transmission In System - AMX Enova DGX 100 Series Hardware Reference Manual

2. The Enova DGX Switcher verifies that the display devices are authorized to receive the protected content (this is the
part of the process in which renewability of the SRM (System Renewability Message) list is verified; this verification of
the display devices occurs inside the switcher). The content is encrypted and transmitted.
3.
The source device's transmitter periodically verifies that the HDMI input is still synchronized and capable of
decrypting the protected content.
4.
The Enova DGX Switcher periodically verifies that the display devices are still synced and capable of decrypting the
protected content.
If the source does not support HDCP, the display device does not need to support HDCP. The unencrypted content from
the source is simply routed through the outputs to the display devices.

Supported Number of Sinks

HDCP Source Device

The number of sinks that the source device supports is not relevant when using Enova DGX Switcher boards that support
HDCP because the input connector on the board is the only sink that the source device needs to authenticate.

Enova DGX Switcher

The HDMI outputs in an Enova DGX Switcher each support a maximum of 16 downstream devices (repeaters and/or
destination devices).

Unsuccessful Transmission in System

If an Enova DGX Switcher does not successfully transmit the protected content to any of the routed sinks, it may indicate
one of the following conditions:
Non-compliant device – The sink device is not HDCP compliant or has had its authentication key revoked.

NOTE:
revoked keys.
HDMI output sink support limit exceeded – The output is actively routed to more than 16 downstream devices

(display devices and/or repeaters) from a single output connector on an Enova DGX Switcher.
IMPORTANT: Keep in mind that a "failure condition" (in which HDCP authentication fails to occur) is verified by the Enova
DGX Switcher not the source device and will result in the image being a dark red.
NOTE: Most Blu-Ray players play all content (even un-encrypted content) as encrypted content. Normally the Enova DGX
Switcher switches non-encrypted content without problems if the display is non-HDCP compliant. However, when
encrypted content is sent from a Blu-Ray player to the Enova and is switched to a device that does not support HDCP, the
content will not display and the image will be red.

Video Troubleshooting

The following troubleshooting tips involve signal support from or to third-party devices.
Problem
The HDMI Input Board does not pass video through the
enclosure to a connected display.
The likely cause is that the signal is from an incorrectly
formatted source (e.g., VTC, wall processor with combined
output, or signal generator) and the Enova DGX firmware
(v1.6.4.1 and later) includes a background measurement
process for detecting valid video.
If the incoming signal fails to meet the Enova DGX criteria, it
will not pass the signal.
Video from the HDMI Output Board to a third-party device
(e.g., VTC, wall processor) does not display or displays with
flickers.
The problem is usually caused by destination devices with
weak or no input equalization (i.e., the video stream from the
output board attempts to lock onto the destination; however,
the destination is unable to provide a stable connection). This
is made worse when signals are passed through low-quality or
long-distance cable runs.
Intermittent or solid screen blanking after the video source is
disconnected (VIDOUT_SLEEP is enabled).
Enova Digital Media Switchers - Hardware Reference Manual
key revocation is handled strictly by the Enova DGX Switcher. The source does not take any action with respect to
Solution
Turn off the firmware's background checks and run video without them:
• Install Enova DGX firmware v3.0.0.4 or later.
• Use the DGX_SHELL command set BCPUx_bg_vsync_disabled=ON
(where x is the input board slot number) to disable the background
check (affects the entire input board). The command
BCPUx_bg_vsync_disabled=OFF enables the background check.
The video will route through the Enova DGX from source to destination as
soon as the command is sent. The board's setting persists through power
cycles and will persist the setting when removed from the enclosure and
added to another, while a new board replacing the old board will be set
to OFF (default).
Note: A complete list of the DGX_SHELL targets, BCPUx, is in the "Product
to Board Slot Correspondence" table on page 275.
Use one or more of the following work-around suggestions to avoid the
issue:
• Replace low quality cables with higher quality cables.
• Use shorter cable runs.
• Install an EDID emulator, an HDMI equalizer/repeater, or another
device that rebuilds/re-clocks the signal.
You will know the problem is resolved when the video signal appears on
the display device without flickering.
For the video output attached to the problematic monitor, either
uncheck the Allow Display Sleep option and set the Blank Color in the
System Configuration interface (see page 184).
Alternatively, set VIDOUT_SLEEP-DISABLE (page 221) and
VIDOUT_BLANK-<color> (page 217).
HDMI Input & Output Boards
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