Comtech-ef-data MIDAS Version 4.X Basic Configuration Instrukcja Użytkownika Pobierz pdf (Strona 145)

MIDAS 4.2 Basic Configuration Rev. 1

Maintenance Menu A–3

To convert from L-Band to IF, the formula is :

IF Frequency = L-Band Frequency – Conversion Factor

IF Frequency = 970 MHz – 900 MHz

IF Frequency = 70 MHz

Example of Ku-

Band Carrier

The translation formulas show the RX center frequencies of a 36 MHz trans-

ponder 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.

Example: 2.4 MHz (on the transponder) the Ku-Band RX Center fre-

quency is 11.7325 GHz (± 1.2 MHz).

This example uses a 10.75 GHz Ku-Band to L-Band LO (Low-Side Injection),

1.4 x symbol rate carrier spacing, and a 70 MHz IF. The System Setup screen

would be configured as follows:

1 2 ... 140 141 142 143 144 145 146 147 148 149 150 ... 163 164

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Comtech-ef-data MIDAS Version 4.X Basic Configuration Instrukcja Użytkownika Strona 145