Comtech-ef-data MIDAS Version 4.X Basic Configuration Instrukcja Użytkownika Pobierz pdf (Strona 149)

MIDAS 4.2 Basic Configuration Rev. 1

Maintenance Menu A–7

Note: Normally, there is no frequency inversion between the IF (70 MHz) and the RF

(C-Band or Ku-Band). If there were a frequency inversion between IF and Ku-Band,

the IF to Ku-Band conversion is altered slightly.

The IF frequency is subtracted rather than added. In the example of a Ku-Band

frequency of 11.72825 GHz, the IF frequency would be 61.75 MHz, 8.25

MHz below the IF center of 70 MHz.

RF = Transponder RX Center + 70 MHz – IF

RF = 11720 + 70 – 61.75 = 11728.25 MHz

Also, in this case, the IF to L-Band formula changes, and the conversion factor

is:

Conversion Factor = Transponder RX Center – 10750 MHz + 70 MHz

Conversion Factor = 11720 MHz – 10750 MHz + 70 MHz

Conversion Factor = 1040 MHz

The usage of the conversion factor is:

L-Band = Conversion Factor – IF Frequency

IF = Conversion Factor – L-Band

1 2 ... 144 145 146 147 148 149 150 151 152 153 154 ... 163 164

Brak uwag

Comtech-ef-data MIDAS Version 4.X Basic Configuration Instrukcja Użytkownika Strona 149