Tektronix 1240 is Portable Logic Analyzer. The Tektronix 1240 Logic Analyzer has up to 100MHz sample, glitch triggering,14 levels of triggering and mnemonic disassembly. Up to four modules can be installed in the mainframe to create a 72 channel analyzer with auto run mode software analysis. Each mainframe has four card slots which accommodate any combination of 9 channel(1240D1) and 18 channel(1240D2) data acquisition cards.