🚀 go-pugleaf

It seems as many people out there are interested in laser-rangefinders.
I got lots of answers to my question earlier, and I've done the homework
for this time. Now for todays questions.

If the beam is modulated with a frequency of, say, 10MHz (30 meters), how
can I electronically measure the phase difference between outgoing signal
and reflex. If I use an oscilloscope, it's easy to se how many millimeters
the reflex is from the output and multiplying that with the timebase gives
the time. (And from that ofcource the distance.) But how can this be done
electronically? I suppose the solution is't that difficult, but at least
I don't know how to do it.

SNAIL: ERICSSON TELECOM         Vox humana:  (+46) 8 - 719 62 52
       Bjoern Fahller           Fax machina: (+46) 8 - 740 28 34
       KK/ETX/TT/MLG
       S-126 25 STOCKHOLM       Isn't the net fantastic. It must be one
       SWEDEN                   of the biggest and fastest banks of know-
                                ledge availible in the world.