Meinberg IMS-GNS181, Руководство по установке

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4.1.1.17 Switch Card
The RSC (SCU) switch card is an automatic multiplexer for redundant systems with two Meinberg radio clocks.
The card is used for the automatic switching of the pulse and frequency outputs as well as the serial interfaces
of the connected clocks. The selection of the respectively active system is made, based on the state of the
clock’s generated TIME_SYNC signals, which show the synchronous state of the clocks.
In order to avoid unnecessary switching operations, for example during periodic free running of a system,
the order of the active and the reserve system is exchanged at every change-over. For example, if the active
system switches to the free running mode while the reserve system is operating synchronously, it is switched
over to the synchronous reserve system. A reset to the old state occurs only if the now active system (formerly
the reserve system) loses synchronization, while the reserve system (previously active system) operates syn-
chronously. If both systems operate in the free-running mode, no changeover is made and the current state is
retained.
4.1.1.18 Receiver Information Switch Card
This menu item lists all the important information and options of the switch card.
26 Date: 20th March 2020 IMS-GNS181 Setup Guide