I would do a dead bug construction and insert inside the equipment and mark it 10MHz reference. All your instruments will be sync.! Raj, vu2zap At 24-07-2012, you wrote: >Ready made or to be built? Use a divide-by-10 (7490-like) set to divide >with 50% duty cycle or divide by 5 then by 2. > >On Tue, Jul 24, 2012 at 2:18 PM, Chris Wilson <chris@chriswilson.tv> wrote: > >> >> >> 24/07/2012 13:14 >> >> My Racal Dana 9908 can take a 1 Mhz external reference. Inputting my >> Thunderbolt at 10 MHz works, but shifts the decimal point over. I am >> not sure if this has any other detrimental effects as to accuracy or >> other? What's the easiest way to have a 1 MHz reference from the >> Thunderbolt for this timer / counter please, yet retaining 10 Mhz for >> my other devices that want a 10MHz reference signal? Thanks.