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When a NioNode has been configured to receive an external clock signal via the AES card, an LED is shown on the control surface (Slot x: AES tab) next to Ext clock source; this is for input channels 1 and 2.
When the system is working normally and a clock signal is received, the Ext clock source and Lock LEDs are lit (green). If the clock signal is interrupted, the Lock LED will be unlit and the Error LED will be lit (red); all channels on the AES card will be muted automatically; the last received clock signal will continue to be transmitted from the AES card on to the network so that devices can be synchronized and there is no audio disruption.
Note: If the signal received via the AES card contains audio as well as a clock signal, and the audio is being passed to other devices in the project using flyoffs, we recommend that the devices connected to these flyoffs are muted automatically should the clock signal no longer be received. When the clock signal is recovered, after a short delay – 0.5 seconds, for example, the devices can be unmuted. The delay allows the AES clock to resync to the external clock signal.
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See also Using an external clock source to synchronize devices on a CobraNet network |