Issue link: https://iconnect007.uberflip.com/i/1305670
NOVEMBER 2020 I SMT007 MAGAZINE 61 Figure 2: (a) HP's PTS arrangement with a continuity tester, (b) coupon test fixture for individual coupons, (c) milliohm measurement using a 1-amp power supply and digital panel meter in a Kelvin four-wire test configuration. Figure 3: CAT (a) drill overshoot coupon, (b) conductor/spacing coupon, (c) solder mask registration coupon (d) four via nets daisy-chain coupon, (e) impedance coupon, (f) registration coupon, (g) sensitive AC chopped four-wire micro-ohm test system, (h) portable coupon test system using Agilent 34401A meter, (i) close-up of coupon probes, and (j) current and voltage arrangement of the four-wire Kelvin measurement configuration (cat-test.info) [2] .