Harold Mattison
PSL Electrical Engineer

Harold's areas of expertise include:

• High-speed digital logic design and analog circuit engineering
• Low level analog circuit design
• Software diagnostics and I/O driver development
• Lightning and transient protection design and system analysis, and grounding
• Discrete logic design including ECL, CMOS, TTL and low voltage TTL
• Gate arrays and programmable logic circuits
• Software languages ANSI C, Visual C++, Assembly (68K, Mips, PowerPC, PowerQuicc)
• Software development process
• Communication protocols
• Project management methodology

Harold has used his skills and expertise to:

• Design, and develop 5 megahertz, software calibrated, signal integrator
• Create the Milestone Matrix, a unique one page, graphical method for presenting the status of large, multi-year projects
• Design and develop micro-coded, queuing disk controller. Write design verification software, diagnostics, and I/O drivers.
• Design and develop magnetic tape controller. Design hardware, write software drivers and diagnostics.
• Create, design, and develop high speed, memory mapped signal averaging data acquisition interface.
• Create the concept, design, and develop raster screen printer incorporating 8051 microprocessor. Develop pixel conversion algorithms and write system software.
• Architect, design, and develop universal RS232, RS485, RS422, RS423 serial I/O interface for PowerQuicc processor. Develop diagnostic and test software
• Develop, document, and implement an ISO 9000 software development process
• Manage development of a large(10,000 task) mini-supercomputer. Design process included logic simulation, logic timing, pcb floor planning, routing prioritization, post route timing analysis, and automatic ATE vector generation.

In his current PSL position Harold uses his specialized skills in:

• Developing ESD control equipment and procedures for South Pole instrument deployment.
• Designing a fail-safe emergency stop control system for Enhanced Hot Water Drill (EHWD) that on command stopped all motion and power. 
• Designing EHWD load cell amplifier system for the high EMI environments experienced at the South Pole. Developed and tested circuit topologies and shielding configurations for low noise and EMI susceptibility.
• Project manager for design, construction, and installation of three new computer controlled Dark Freezer Labs for testing IceCube Digital Optical Modules.