... modules, 4 forward. CSP8500 Optical Working StationSummary4 output, 45/87-862MHz, 2 optical receiving module, 2 retrun path transmitter, 2 power ... display.•Wide range of input optical power .•PHILIPS Power doubler output module•Four outputs with plug-in splitter•Plug-in splitter(tap) ... in output and plug-in return path module•Models with local and remote powering•HMS ...