Comtech EF Data LCS-4 - Manual (Page 62)

LCS-4 L-Band Combiner Switch Revision 1
Front Panel Control MN/LCS4.IOM
7.3 O
PERATION
7.3.1 AUTO / MAN O
PERATION
The AUTO/Man switch selects automatic redundancy operation of the unhit in the AUTO mode
and permits operation of the unit from the front panel when MAN is selected.
The other keys on the front panel operate when MAN is selected and they are disabled when
AUTO is enabled.
7.3.2 CAL S
WITCH AND
LED O
PERATION
When CAL function is actuated the L-Band Combiner Switch measures the current supplied to
the ODU/BUC(s) and LNB(s).
Senses BUC current and sets a measurement window of +20% and –20% of current measured
when the CAL function is actuated. The window shall not exceed the capabilities of the power
supply.
• This is accomplished automatically for the installed power supplies. If no BUC power
supplies are installed, No Fault is indicated in the event the unit is deployed only as a
combiner and power supplies are power supplies are provided external to the unit.
• It is possible to program the other upper and lower limits via the remote port. In this case
the CAL = ON enables the values set via the remote port.
Programs the LNB voltage window of 18 VDC +20% and –20% when the CAL function is
actuated. The window must not exceed the capabilities of the power supplies.
• It shall be possible to program other upper and lower via the remote port. In this
case the CAL = ON enables the value set via the remote port.
Senses LNB current and sets a measurement window of +20% and –20% of current measure
when the CAL function is actuated. The window shall not exceed the capabilities of the power
supply.
• It shall be possible to program other upper and lower limits via the remote port.
In this case the CAL = ON enables the value set via the remote port.
Once CAL is completed, if as BUC or LNB power supply is tuned OFF (Power Supply changes
require that the unit is in MAN mode) the faults associated with that BUC or LNB are disabled.
The faults are still disabled if the unit is returned to AUTO mode.
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