FEATURES Key features of the Model 7172 Low Current 8x12 Matrix Card include: • 8 x 12 (eight row by 12 column) switching matrix. • All paths have <500fA of offset current and typical values of 150fA. • Electrometer to measure the offset current on the card as a self-test. Front panel LEDs give pass/fail information or PCB connector gives voltage proportional to offset (lmV=10fA). • Three-lug triax connectors for all row and columns allow guarding of each signal pathway to minimize the effects of stray capacitance, leakage current, and leakage resistance. • Model 7172 cards can be internally connected together or to Model 7072 cards using supplied SMB to SMB jumpers to expand the number of columns in the matrix.