Comtech EF Data CST-5000 - Manual (Page 108)

CST-5000 C-Band Satellite Terminal Theory of Operation
Rev. 9 5–19
5.6 Up Converter
The function of the up converter is to convert the 70 MHz IF signal used in the indoor
unit modem to a C-Band signal to be sent to the HPA.
Refer to Figure 5-9 for a functional block diagram of the up converter.
UP CONVERTER
IF INPUT
LO INPUT
FROM IFLO
FROM
SYNTHESIZER
5845 TO 6425 MHz
SMA FEMALE
LO INPUT
RF OUTPUT
PHASE
EQUALIZER
ATTENUATOR
70 MHz (+/-18 MHz)
-30 dBm
SMA FEMALE
1060 MHz
+8 dBm
SMA FEMALE
4715 TO 5295 MHz
+8 dBm
SMA FEMALE
(TYP)
Figure 5-9. Up Converter Block Diagram