Comtech EF Data MIDAS Version 4.X NMS Configuration - Manual (Page 138)

MIDAS 4.X NMS Configuration, Rev. 6
A-6 Frequency Translations
beginning of the Space segment. This is simply adding the 1/2 of the carrier (for the center)
multiplied by the spacing, to the beginning frequency of the space segment. Since this is
determining the IF, all values are in MHz:
Center Frequency
of the Outbound =
Frequency of beginning of Space Segment + (Symbol Rate * 0.5 * Carrier Spacing)
(81.3 MHz + (.0192 * 0.5 * 1.5625))
Center Frequency
of the Outbound =
81.3 MHz + .0015
Center Frequency
of the Outbound = 81.315 MHz
Find the center frequency of the Inbound Control Channel by adding the 30kHz spacing:
Center Frequency
of the Inbound =
Center Frequency of the Outbound + Carrier Spacing
(81.315 MHz + 0.030 MHz)
Center Frequency
of the Inbound =
81.315 MHz + .030 MHz
Select System Administrator. Configure the Outbound and Inbound Control Channel
Frequencies.
Note: Refer to Section 2, Initial Setup Procedures for descriptions of additional Control
Channel and LinkSync parameters.