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System setup – Comtech EF Data MIDAS Version 4.X NMS Configuration User Manual

Page 135

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MIDAS 4.X NMS Configuration, Rev. 6

Frequency Translation

A-3

An Example Ku-Band
Carrier

The translation formulas above show the RX center frequencies of a 36 MHz transponder
at Ku-Band, L-Band, and IF. This establishes the reference points need when determining
how to set up the MIDAS system to manage the bandwidth that occupies a portion of a
transponder.

System Setup

For example, suppose you have 2.4 MHz on this
transponder that your Ku-Band RX center
frequency
is 11.7325 GHz (

± 1.2 MHz). This example will use a

10.75 GHz Ku-Band to L- Band LO (Low Side Injec-
tion),
1.4 x Symbol Rate carrier spacing, and a 70
MHz IF. Select System Administrator. Configure the
Satellite and Transponder in the System Administra-
tion screen as follows:

Figure A-2. Ku-Band Satellite Setup Example