2 optical receive module, automatically or manually switched, hot backup power supply, 2 return transmission modules, 4 forward.

CSP8500 Optical Working Station
Summary
4 output, 45/87-862MHz, 2 optical receiving module, 2 retrun path transmitter, 2 power supply module, built-in status monitor, HMS, power supply backup module and response module are optional, imperial F type female port,FC/APC or SC/APC connector,rated output level104dBuV(input optical power -2dBm), outdoor waterproof housing,AC135~250V(power cord with EURO(2 pole with GND) or USA standard plug(3 pole) or 35~90V
Features
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High quality PHILIPS optical receiving module.
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Status monitor display.
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Wide range of input optical power .
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PHILIPS Power doubler output module
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Four outputs with plug-in splitter
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Plug-in splitter(tap) in output and plug-in return path module
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Models with local and remote powering
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HMS network management
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Switch-mode power supply
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Weatherproof and RF-screened die-cast housing