Comtech EF Data MIDAS Version 4.X NMS Configuration - Manual (Page 134)

MIDAS 4.X NMS Configuration, Rev. 6
A-2 Frequency Translations
1 1 7 0 0 F c = 1 1 7 2 0 1 1 7 4 0
K u - B a n d
7 0 M H z IF
5 2 M H z F c = 7 0 M H Z 8 8 M H z
L - B a n d
3 6 M H Z
G u a r d B a n d
1 1 7 0 0 - 1 1 7 0 2 K u 1 1 7 3 8 - 1 1 7 4 0
9 5 0 - 9 5 2 L 9 8 8 - 9 9 0
9 5 0 F c = 9 7 0 9 9 0
Figure A-1. Ku-Band Frequency Translations
Ku-Band Frequency
Conversion Formulas
The relationship between Ku-Band and L-Band frequencies is:
Transponder RX Center
– Downlink Factor =
L-band 11.720 GHz – 10.750 GHz = 970 MHz
In order to convert an IF frequency to L-Band, the conversion factor is:
Conversion Factor = Transponder RX Center – Downlink Factor – IF
(11720 MHz - 10750 MHz - 70 MHz)
Conversion Factor =
900 MHz
To convert from L-band to IF, the formula is:
IF Freq = L-Band Frequency – Conversion Factor
(970 – 900 MHz)
F Freq =
70 MHz