On 08/20/2010 07:39 PM, J. Forster wrote: > Virtually any HP counter made after 1975 will do that. You might also look > at a Tektronix TM-500 counter (DC503, ...) and mainframe. A HP5335A or HP5334A should be good value for the money in that category, just to get you started in finding something. Cheers, Magnus