An apparatus for altering a chirp of an input light comprising one or more grating structures and one or more electro-optical blocks. An electronic circuit apparatus 5 of the present invention includes a board 60 with a circuit element 70 mounted thereto, a case 80 holding and surrounding the board 60, and a board mount connector 1 mounted onto the board 60 and holding the electrolytic capacitor 20. The data port assembly and simplex receptacle assembly are receivable within a channel support through ends of the channel support and are positionable in desired positions along the length of the channel support. The top layer assembly is attached to a water resistant substrate through the use of a water resistant adhesive.