Comtech EF Data CST-5005 - Manual (Page 86)

Theory of Operation CST-5005 C-Band Satellite Terminal
5–16 Rev. 1
The M&C board also supplies the DC power for the LNA, which is subsequently
injected into the RF input connector.
5.6 Up Converter
The function of the up converter is to convert the 70 MHz IF signal from the indoor unit
modem to a C-band signal to be transmitted.
Refer to Figure 5-8 for a functional block diagram of the up converter.
Figure 5-8. 5W Up Converter Block Diagram