Operating instructions

8 | MCO-5211
4 Operating Instructions
Fi g . 4-1 Front of the In strumen t
4.1 Front Panel Indicators
REMOTE
A yellow LED that indicates that the unit is being controlled from the remote interface, not from the front panel.
ON AIR
Two green LEDs that indicate which sync generator is "on air". One (and only one) of the ON AIR indicators will be
active at all times.
FAULT
Two red LEDs, each indicating that an error has been detected in the corresponding sync generator. When an LED is
illuminated, it indicates that the error in the sync generator is momentarily active.
4.2 Front Panel Controls
HOLD TO MODIFY
A safety button which has to be held down whenever another button is operated. This function reduces the risk of
accidentally changing the function of the changeover.
MANUAL
A button that takes the unit into the manual operation mode. The unit does not respond to any detected errors in the
connected MSG-5300s (except for the fault indicators which are still enabled). If the yellow LED in the button is lit, this
indicates that manual mode is activated.
AUTO
A button that takes the unit into automatic operation mode. The unit switches automatically according to the status of
error detection circuit in the sync generators and additional setup parameters in the changeover unit. A lit yellow LED
in the button indicates that auto mode is activated.
SYNC GEN. 1 I PRIMARY
A button used to select Sync Generator 1, MSG-5300, as the primary- i.e. Sync Generator 2, MSG-5300, as backup.
If the green LED is lit, this indicates that Sync Generator 1 is selected as primary.
SYNC GEN. 2 / PRIMARY
A button used to select Sync Generator 2, MSG-5300, as the primary- i.e. Sync Generator 1 as backup. If the green
LED is lit, this indicates that Sync Generator 2 is selected as primary.
REMOTE ENABLE
A button that enables use of the remote interface. Depending upon the selection on the remote connector the
instrument may go into remote-controlled mode. In emergencies it is always possible to disable the remote and take
the instrument into the local mode controlled from the front panel
.