--Oxidation processing, water-proof aluminum housing with stainless mesh gasket
--Optional low noise circuit ensures non-linear specification;
--Optional GaAs circuit allows low power optical input;
-- Accurate 1V/1mv optical detection port;
-- Six LEDs indicate status of optical input power and power supply;
--Fixed preposed attenuator and four fixed postpositive attenuator in the forward path;
-- Attenuator, equalizer and postpositive equalizer in the forward path are fixed or modular adjustable changeable;
--Separate AC port and two outboard test ports;
-- All ports have AC indicating LEDs;
-- Two/Four output ports in forward path.
-- Changeable tap and splitter output;
-- PCB adopts Intergrated Shield design;