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5.4 Indicator Lights (LEDs)

There are three LEDs on the MC1 interface board. They are colored red, yellow, and green.
Red

Yellow

Green

 Description

ON

--

--

Board has detected an error

OFF

OFF

OFF

 Slave Left

OFF

OFF

 ON

Slave Right

OFF

ON

OFF

 Driving Left Clock

OFF

 ON

 ON

 Driving Right Clock

The red LED indicates if the board has detected an error. The error can be one or more of the following:

Once an error has been detected, the red LED will remain lit until the error has been cleared and the MC1 board is reconfigured with the MC1_CONFIG command or with mc1mon.

The yellow LED indicates if the card is driving one of the MC1 clocks. If the yellow LED is illuminated, the card is driving either the right or left MC1 clock. This means it is either a primary or secondary master. If the yellow LED is off, the card is a slave.

The green LED indicates which MC1 clock is being used. If the green LED is illuminated, the right clock is being used. If the green LED is off, then the left clock is being used.


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