Instagate Pro® Technology; Troubleshooting Video - AMX DGX1600-ENC Hardware Reference Manual

InstaGate Pro
InstaGate Pro Technology eliminates latency (time required for authentication) in the switcher for HDCP negotiations with the
displays in a system. The latency is typically experienced when HDCP authenticates HDMI source and destination devices every
time a new switching combination between a source device and display occurs. With InstaGate Pro Technology, when a source
requires HDCP encrypted content, the inputs and compliant downstream devices are automatically authenticated – it just works.
Key limitations on source devices are also eliminated by allowing them to see only a single sink key from the HDMI Input Board's
input connection.
NOTE: Some destination devices have a longer lag time than others between receiving a signal and displaying that signal. Although
InstaGate Pro significantly reduces the latency associated with HDCP authentication, it cannot reduce the inherent lag time of a
device as it syncs up to the newly switched video image.

Troubleshooting Video

The following troubleshooting tips involve signal support from or to third-party devices. The first tip resolves potential problems
from third-party sources and the second resolves potential problems when using third-party destinations.
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.)
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).
TIP: A complete list of the DGX_SHELL targets, BCPUx, is in the "Product to Board Slot Correspondence" table on page 245.
Problem – 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.
Solution – 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/reclocks the signal.

You will know the problem is resolved when the video signal appears on the display device without flickering.
Problem – Intermittent or solid screen blanking after the video source is disconnected (VIDOUT_SLEEP is enabled).
Solution – 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 163) or set VIDOUT_SLEEP-DISABLE and VIDOUT_BLANK-<color>
(see page 199).
Hardware Reference Manual – Enova DGX 100 Series Digital Media Switchers
®
Technology
Enova DGX HDMI Boards
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