XTA MX Series, Operator'S Manual, Page: 26 / 41

Page 26 MX Series — MX24 Operating Instructions
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Operating Your MX24: With and/or Without Redundancy
Each of the “sets” of four inputs can be considered as having a switched sub-mixer to select
either the Dante streams, the AES pairs or the analogue inputs for the quad mix that appears
at the “top” of the console select switch, A or B. The switched sub-mixer can either be used
automatically (so with redundancy/failover) where the MX24 decides what selection to use
based on the Primary and Backup settings chosen, or, if redundancy is disabled (so either
Primary = Analogue, or Backup = OFF), then the Primary selection determines which source
appears at the “top” of the console select switch.
Conditions That Trigger a Source Change in Redundancy Mode
If using Dante, then obviously if the audio network cable is disconnected, the unit will switch
to the backup source, and indicate this by flashing the Primary or Backup selector button for
the appropriate set A or B and the source LED like this:
All four Dante inputs in a set MUST have a subscription for the unit to
consider this as valid signal conditions. If any channel of the set has its
subscription removed (it can be changed but not removed) then all four
are considered as lost and the unit will switch the set to the backup
source (if one is selected).
In AES mode, the same holds true but for pairs of AES inputs — BOTH
AES streams (forming the four inputs) must have a valid AES streams —
loss of clock, or validity, parity or non-audio flags or physical
disconnection of EITHER stream will be seen as source lost and the unit
will switch the set to the backup source. It will indicate the loss by
flashing the Primary or Backup selector button and the AES LED.
When using a single AES source (so, only two channels of audio), it is possible to configure a
set to work with stereo only and ignore channels 3 & 4. This means that loss of lock etc., or
disconnection of just 1 & 2 will trigger a source change. See page 39 for details of how to
configure this mode.
If a Source is Restored…
If the source is restored, the selector button will stop flashing, and the
source will be reselected automatically. The unit will automatically
switch back to the higher priority source by default
1
.
The point to remember is that if nothing is
flashing, all sources are good and the
primary choice is in use!
1
This default mode of operation will be adjustable in a future firmware release to allow for manual reselection of
restored sources.