Patent ID: 8324885

Claim:
A mixed signal acquisition system for a measurement instrument, comprising: an analog input interface mounted on a panel of said measurement instrument for receiving an analog signal; an analog-to-digital converter for converting the analog input signal from said analog input interface to an N-bit digital signal wherein N is a positive integer: a logic input interface mounted on the panel of said measurement instrument and having N terminals for receiving logic signals; N latch circuits for latching the logic signals from said N logic input terminals respectively; a multiplexer for selecting one of the N-bit digital signal from said analog-to-digital converter and the N logic signals from said N latch circuits; and a memory for storing the output from multiplexer; and wherein said multiplexer selects the analog input signal when the analog input signal is applied to said analog input interface and said multiplexer selects the logic input signals when the logic input signal is applied to said logic input interface.