The Tek TLA7L2 Logic Analyzer is a 2GHz timing, 68 channel acquisition card for the TLA7xx series logic analyzer mainframes. The installed options 1S, 2S give this unit 200MHz state and 128k depth. It is directly compatible with the TLA704 and TLA711 mainframes. The TLA7L2 can also be used in the newer TLA714 and TLA720 mainframes as explained here by Tektronix: Will my older TLA7Lx and TLA7Mx logic analyzer modules or TLA7Dx and TLA7Ex digitizing oscilloscope modules work in the newer TLA714 portable or TLA720 benchtop mainframes? "Yes, but you must reflash the firmware on your modules with the new Version 4.0-compatible firmware located on your TLA mainframe hard disk. If any module that is not running Version 4.0 compatible-firmware is installed in a TLA mainframe running Version 4.0, the TLA application software will not recognize the module nor will it show up in the System window."