AMX Enova DGX 8 Instruction Manual page 71

If the content is protected (HDCP), the Enova DGX Switcher functions as an InstaGate Pro sink and through the
HDMI (or DVI) output connectors handles verification of the connected individual downstream sinks / destination
devices (and downstream repeaters in the path if applicable). This means that the source device only needs to
authenticate the HDMI input. Once the authentication is complete, the encrypted content begins to display on the
destinations.
Note: Enova DGX Boards do not support CEC.
HDMI System Conditions
Normally, all devices used in an HDMI system are HDCP compliant. Each HDCP capable device has a unique set
of confidential keys (used to encrypt and decrypt the data).
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* In some cases, source devices will always enforce HDCP even if the content is not protected. In those cases, when the
source device sees that its output is connected to the input of the Enova DGX HDMI board (or another HDCP compliant
sink), the source device will always enforce and encrypt the HDMI signal that it sends. If the system's equipment
includes this type of source device, be aware that DGX HDMI Boards will not be able to route that source device's signal
to a non-HDCP compliant display or through an SC Optical Output Board.
** If the connected downstream sink is not HDCP compliant, then the HDMI output will not send the signal. This does
not affect other outputs the source may be routed to. This allows compliant displays to show content from source devices
even if the source devices are switched to non-compliant displays. Non-compliant outputs can easily be identified
because they display a dark red image to indicate they failed the authentication process.
The content protection process for the point-to-point connection between the upstream transmitter on the source
device and an HDMI input connector (which is an RX) on the Enova DGX Switcher through an HDMI output
connector (which is a TX) to the destination device includes four steps.
Steps in the Content Protection Process
1. The transmitter on the source device uses authentication protocol to verify that the HDMI input is authorized
to receive the protected content. (This is true regardless of how many destination devices the source is being
routed to.) The content is encrypted and transmitted.
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.
Note: 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.
Instruction Manual – Enova DGX 8/16/32 Digital Media Switchers
Normally HDCP is used only when the source content is copyright protected.* Unprotected content is not
affected and may be routed as desired.
Each HDMI input can be routed to any number of outputs. The HDMI input (using
InstaGate Pro Technology) is the only sink that the source device is required to verify
(unless any repeaters are installed between the source device and the Enova DGX Switcher).
Each HDMI output goes through a verification process with its connected sink(s).** Each HDMI output can
support a maximum of 16 devices (repeaters and destination devices) with seven levels, i.e., the number of
times the signal goes through a repeater prior to going to the sink. However, if the HDMI output goes into a
device which is also utilizing InstaGate Pro, then the process starts all over again and the Enova DGX
Switcher only sees the input of that InstaGate Pro device as the one sink that it needs to verify. So even
though the number of sinks each HDMI output on the switcher can handle is finite, the number of sinks can
be unlimited if using AMX devices that support InstaGate Pro Technology.
Enova DGX HDMI Boards
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