Cascading Hubs
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UDM-0808-SIG, UDM-RX02N and UDM-ABB-8-SIG Operation /Reference Guide
Configuring the Hub as a Target Hub
In a cascaded Hub installation, downstream Hubs must be configured as "Target" hubs, and should follow a top
(Source) to bottom (Target #1, Target #2, Target #3) configuration.
"MMOFF" Send Command
Use the "’MMOFF’" Send Command to configure a Hub as a Target Hub in a Cascaded system:
Syntax:
SEND_COMMAND <DEV>,"'MMOFF'"
Example:
SEND_COMMAND dvUDM,"'MMOFF'"
Sets this Hub to Target Hub mode.
Refer to the UDM-0808-SIG NetLinx Programming section on page 13 for a listing of all Send Commands
supported by the UDM-0808-SIG.
Specifying Cascaded Ports
Any Target UDM-0808-SIG Hub has the option of defining each of it’s inputs (A-H) as either:
Local - A/V sources are directly connected to the Hub, and defined as Inputs to one or more Input
ports (A - H).
- or -
Cascaded - A/V sources are physically connected to the upstream Source Hub, and passed
downstream to the Target Hub via the UDM Cascade cable. Any Input Ports that are configured as
Cascaded will replace the available inputs on the Target Hub.
In this way, you can create a fully matrixed 8x32 system, or create zones pulling from different sets of sources,
with certain sources from the Source Hub made available to all zones.
"SVI" Send Command
Use the "SVI" Send Command to configure a specific video input to accept signals of a certain type, and set
the source as either a local source (connected directly to the UDM-0808-SIG Inputs A-H) or cascaded from an
upstream UDM-0808-SIG Hub.
Syntax:
SEND_COMMAND <DEV>, "'SVI<I#>T<T#>C<C#>'"
Variables:
I#
= input number - a value of zero indicates all inputs, initial 'I' may be omitted
1-8
= Inputs A-H
0
= All inputs
T#
= type of incoming video:
"
VGA
"
"
CVBS
"
"
SVIDEO
"
"
COMP
"
If Source or Target mode is changed, then the Hub must be rebooted via the
"'RESET'" Send Command (page 18).
When changing a Hub from a Target Hub back to a Source Hub, you must send the
MMON command, RESET the unit, allow it to come online, then RESET it again.
If Source or Target mode is changed, then the Hub must be rebooted via the
"'RESET'" Send Command (see page 18).
