Comtech EF Data HPCST-5000 - Manual (Page 26)

Introduction High-Power C-Band Satellite Terminal
1–10 Rev. 0
1.5.2 Low Noise Amplifier (LNA)
The low noise amplifier (LNA) assembly consists of a TX reject filter, waveguide switch,
and two 65
!K low-noise 50 dB gain amplifiers.
1.5.3 Solid-State Power Amplifier (SSPA)
Note: Refer to the SSPA Installation and Operational Manual for additional data.
The SSPA is available in:
" 75W
" 100W
" 125W
" 150W
The SSPA consists of the following subassemblies:
" Power amplifier
" Output waveguide assembly
" RF input isolation circuit
The SSPA is forced air cooled by a fan controlled by a thermal switch. The cooling fan is
configured for 48 VDC operation. Depending upon the environmental conditions, the heat
sink fins may become obstructed by debris, reducing the efficiency of the cooling system.
The heat sink fins may require periodic maintenance in the form of removing debris.
1.5.4 Monitor and Control (M&C)
An on-board microcomputer monitors and controls all operational parameters and system
status of the HPCST-5000. This powerful M&C system enables the user to locally or
remotely control functions such as:
"
TX/RX attenuator settings.
"
TX/RX channel frequencies.