LAWO POWER CORE, Руководство пользователя

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POWER CORE User Manual Version: V6.0.0/5 363/459
19. Networking POWER CORE
19.2.2 On Air Arbitration
The On Air Arbiter element is a one out of eight switch designed for transmission line arbitration from a matrix.
For example, within the master control room you may create a transmitter selector where only one of up to eight
studios can be assigned to a single on-air feed.
For simpler arbitration applications, such as a telephone hybrid selector, use the Feedback Arbiter element.
For selector applications which require signalisation but not arbitration – for example, a transmitter selector
within the studio - use the
Enable Func element.
This element controls the logic of the selector only and not the audio crosspoints.
Up to 8 input ( Key ) signals can be defined, each with its own Enabled , Prepared, Blink and Active output. The
On Air Arbiter allows only one of the 8 outputs to be active at any one time. The Prepared , Blink and Active
control outputs can be used to signal the state of the selector by illuminating MF Keys.
The operation of such a selector is as follows:
1. Before an output can be made active, the corresponding Enable input signal must be True.
This allows you to protect the entire selector or individual outputs.
2. Once the Enable input is true, an operator can press and hold the corresponding Unlock button and
press the Key button in order to prepare an output.
The Prepare control output can be used to signal the selection.
3. The operator must then press the Key button again to activate the output.
The output can only be activated if no other outputs are already active. The Active control output can be used to
signal the activation. The output is deactivated if the Enable input signal becomes False.
To use this feature, add an On Air Arbiter element to the " Logic " branch of the 'Tree Definition'.
On Air Arbiter Reference name for the element.
X – Unlock Assigns the Unlock MF Key (or control input).
Key Assigns the MF Key (or control input) which will prepare output x. The Key can only be
selected if the Enable AND Unlock signals are true.
Enable Assigns the Enable control signal. Unless this signal is true (static) the corresponding
output cannot be prepared or activated.
The control outputs appear under “Logic -> <GroupName> -> OnAir Arbiter” in the 'Tree Selection' window:
x Enabled True if the Enable input if True
x Prepared True if the Enable AND Unlock AND Key inputs are true
x Active True if the Prepared output AND Enabled AND Key inputs are True
x Blink True if the Prepared output AND any other Active output are True.
nActive True if no output is active.