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crystal User Manual Version: 6.6.0/2 390/459
20. Networking Options
20.3.3 Feedback Arbitration
"Logic -> Feedback Arbiter"
The Feedback Arbiter element is a 1-out-of-16 selector switch with arbitration. It is ideal for applications such
as a telephone hybrid selector.
If an output is active, then a different output can ONLY be activated by triggering both the Force Enable and
Input x control signals - for example, if MF Keys are used for the control signals, then the operator needs to
press both Force Enable plus the Input x MF Key to change the active output. The Enabled and Active control
outputs can be used to signal the state of the arbiter by illuminating MF Keys.
This element controls the logic of the selector only and not the audio crosspoints.
Alternative elements are the
On Air Arbiter which offers more protection, and the Enable Func which
provides signalisation but not arbitration.
General Parameters
Feedback Arbiter Reference name for the element.
X – Input Assigns the MF Key (or control input) which will activate the corresponding output if no other
output is True.
Force enable Assigns the MF Key (or control input) which will force the corresponding output to active and
set all other outputs to False.
Note that both the Force enable and X - Input control signals must be true to change the
active output.
The control outputs appear under “Logic -> <GroupName> -> Feedback Arbiter” in the 'Tree Selection' window:
None active True if all inputs are False.
x Active True if the corresponding input is True.
x Enabled True if either all inputs are False or the corresponding Force enable is True.
X Force Enabled True if the corresponding Force enable is True.