Comtech EF Data MIDAS Version 4.X NMS Configuration - Manual (Page 57)

MIDAS 4.X NMS Configuration, Rev.6
Setup and Operation 2–29
L L i i n n k k S S y y n n c c  
LinkSync™ is a unique MIDAS feature providing:
• Automatic Frequency Control (AFC)
• Uplink Power Control (UPC) at NMS site
• Circuit Power Management (Optional)
The AFC process compensates for earth station frequency drift, thereby
reducing the frequency uncertainty for control and traffic channels to within
± 500 Hz of the nominal. This allows for faster call setup, tighter placement of
carriers, and reduced maintenance for RF equipment.
The UPC process dynamically adjusts the uplink transmit power level of the
outbound control channel, thereby allowing it to be downlinked at a constant
power level from the satellite. This function makes it possible for the outbound
control channel to be used as a network wide reference.
Site level call blocking ensures that a node does not transmit at a power level
beyond the HPA capacity. The system blocks a circuit from being set up if the
HPA will exceed the rated power (less backoff), thus improving system
stability.
The LinkSync  section of the System Setup window consists of two buttons
and two checkboxes that allow the operator to enable/disable and configure the
Power and Automatic Frequency Control settings.