Divide-by-1000 3.5 GHz Prescaler

This will take a 0.1 - 3.5 GHz signal and divide it by 1000 so you can measure frequencies outside the normal range of your frequency counter.

Example, a 2450 MHz signal will read 2.450 MHz on your counter. This is from the July 20, 2000 issue of EDN magazine and I made a few modifications.