AMX HDMI-UTPRO-0808 Instruction Manual page 63

Source Device
FIG. 38
Example #4 – Source device supports 3 sinks (R2, R3, and one destination device) downstream of R1
Determining Sink Support Maximum on a Source Device
Determining how many sinks the source can support is necessary to make sure the system runs smoothly.
Note: If you already know how many sinks each source supports, go to "Initializing InstaGate
on page 66 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 64).
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 HDMI-UTPRO-0808 enclosure and connect destination devices to all
outputs on the 8 HDMI-UTPRO-RX Receivers.
2.
Establish serial control between the HDMI-UTPRO-0808 enclosure and the PC with a null modem serial cable via
the Control port (see page 39).
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 a terminal emulation program (e.g., TeraTerm, PuTTY, or HyperTerminal) and enter @et to clear
any keys for supported sinks that may be cached within the InstaGate
command is @eV.
Note: During this process, the destination device must be connected directly to the output of the
HDMI-UTPRO-RX (which is connected to 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 HDMI-UTPRO-0808 enclosure (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.
Instruction Manual – HDMI-UTPRO-0808
HDMI-UTPRO-0808 (Repeater)
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 input (see page 68), 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.
Destination Device
HDMI-UTPRO-RX
Repeaters
®
layer. Note that the response to the @et
Setting Up HDMI Systems
®
Technology"
63