AMX Optima Instruction Manual page 83

Example Determining Sink Support
Determining Sink Support Maximum on a Source Device
Determining how many sinks the source can support is necessary to ensure the system runs smoothly.
Note: If you already know how many sinks each source supports, go to "Initializing InstaGate®
Technology" on page 81 to do an initial authentication of HDMI source and destination devices.
This section is intended to help analyze the system based on the types of source devices used, so any
limits imposed by the source devices within the matrix switching system can be addressed. For example,
if a source that supports a very low number of sinks is switched to more sinks than that source can
handle, the protected content will not be transmitted to any of the routed sinks.
The easiest way to determine the sink support maximum on a source device is to reference the
information from the equipment manufacturer's product documentation. If documentation is not
available, we recommend following the instructions below (an example is also provided on page 77).
Important: During the procedure below, keep in mind that the "failure condition" (in which HDCP
authentication fails to occur) varies by source device manufacturer and may manifest itself in one of
several ways, e.g., snow, static, a solid color, no image at all, or a flashing image (where the image
changes back and forth at a high speed from the correct image to a black screen).
As soon as a source is switched to one more output than it can support, the protected content will not be
transmitted to any of the routed sinks.
To determine sink support maximum up to 8 on a source device:
1.
Connect the source device to an input on the Optima and connect destination devices to all 8
outputs.
2.
Establish serial control between the Optima and the PC with a null modem serial cable via the
Control port (see page 29).
3. Using your preferred method of control, send a command to make sure all outputs are disconnected
from the input for the source device.
4. On the PC, open HyperTerminal (or other terminal emulation program) and enter @et to clear any
keys for supported sinks that may be cached within the InstaGate
the @et command is @ev.
Note: During this process, the destination device must be connected directly to the output of the
matrix switcher and not going through additional equipment (e.g., a repeater).
5.
Execute a switch to the first display device connected to the Optima (i.e., add a sink to the source).
A delay in the display of the video image of approximately 3 to 10 seconds* can be expected due to
the source engaging the display device for the first time initialization of HDCP authentication.
(It is normal for the remaining monitors to lose and then regain content as each new output is
added.)
6.
Once a stable video image is seen at the destination device, continue routing the source to one
additional output at a time (i.e., add each new sink to the source one at a time) until one of the
following occurs (be sure to wait for the HDCP validation process and the resulting stable image to
show each time before adding another output):
* Time for initial authentication can vary noticeably for different source and destination devices.
Optima Instruction Manual
If the source fails to validate a destination device and the image is lost, the number of sinks the
source supports is equal to the total number of sinks that properly displayed the image before
all video was lost.
To verify the failure is due to a source support limitation and not a revocation of the
destination device's key, clear the cache on the board (see page 83), then route the source to
the last destination device again, and verify stable video.
All 8 outputs are validated and show content, i.e., source's sink support maximum is 8 or
more.
HDMI I/O Board
®
layer. Note that the response to
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