Comtech EF Data SMS-451 - Manual (Page 16)

SMS-451 Sateliite Switch Revision 0
Introduction MN/SMS451.IOM
1–2
The switch contains:
• Circuitry for the data
• IF switching
• Remote and local status reporting
• Remote and local control
A 50
Ω system consists of the following assemblies:
Switch Top Assembly AS/1781-1
1:1 Switch Modem PCB AS/1760-1
Chassis Assembly AS/1780
Front Panel Assembly AS/1090
Power Supply PS/AC40W03P02
Cable Assembly (75 Ω) CA/1798B
Cable Assembly (75 Ω) CA/1799B
Cable Assembly, DC Power CA/1772B
A 75
Ω system consists of the following assemblies:
Switch Top Assembly AS/1781-2
1:1 Switch Modem PCB AS/1760-2
Chassis Assembly AS/1780
Front Panel Assembly AS/1090
Power Supply PS/AC40W03P02
Cable Assembly (50 Ω) CA/1800B
Cable Assembly (75 Ω) CA/1799B
Cable Assembly (75 Ω) CA/1798B
Cable Assembly, DC Power CA/1772B
Additional versions of the SMS-451 also support the SDM-2020 Modulator and
demodulator:
• SDM-2020 with G.703 Interface
• SDM-2020 with ASI Interface
IMPORTANT
The 70/140 MHZ and L-Band versions of the SMS-451 are available to
support the SDM-2020 Demodulator. The TX IF of the SMS-451 is
alaways 70/140 MHz.