Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
This article describes a test tool that permits the user to inject one ground condition at a time on cards under test via two hexadecimal switches under remote control. This eliminates individually putting "bugs" on cards under test because the wiring is done all at once. Dial-A-Bug (DAB) is a test tool that allows the user to inject one ground condition at a time on cards under test. The user can inject up to 256 ground conditions via two hexadecimal switches, one bug at a time. Referring to the drawing, a block diagram of the DAB system is shown. Two hexadecimal switches 1 supply eight lines which are decoded in order to drive sixteen light emitting diodes (LEDs) 2, each one specifying a range of sixteen addresses. For example, addresses 00 to OF have one LED, 10 to 1F have another and up to addresses F0 to FF.