I also suggest the 34401A. > fluke 8840A. > 8840AF > HP 3456A. > HP 3455A > Fluke 8506A or 8505A > 8502A All nice instruments but I believe that all are now out of support. I know that the 8840 is. Might want to consider that. Fred -- <>< -- Outgoing checked by eTrust EZ AV