Comtech EF Data MIDAS Version 4.X Basic Configuration - Manual (Page 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.
S S y y s s t t e e m m S S e e t t u u p p
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: