AW: reciprocal frequency counter

[Haible Juergen]

	>Sometimes it would be nice to have a DVM and a frequency counter
	>as a module for a modular system. E.g for tuning and trimming
procedures
	>as well as for practical work.
	>
	>DVM is no problem, there are 5 digit kits available. 
	>
	>Most frequency counters suffer from the fact that they need very
	>long gate times for audio frequencys, ie. much latency. Of course,
	>one could measure the period instead, but say in 2 seconds how many
	>Hertz are 1/0.003674 s ?  (A very "clever" person suggested using a
pll,
	>to make the frequency higher ...) Therefore reciporcal counters
exist,
	>with a microcomputer inside that does this operation for the user,
so
	>you really measure period, but get a frequency reading. Up to now,
you
	>could buy these things for $500 or so at RS etc., now I've found a
kit to
	>do your own for a modest price at ELV Electronics,
(http://www.elv.de),
	>a german company that does kits and complete devices. I found it in
their
	>free catalogue, not on the web.

DVM: My Multimeter is terribly slow, probably because of the cheap
dual slope ADC. Are there cheap Panel Meters that convert faster?

Anybody found an O'Scope small enough (and unexpensive) to fit
into a Modular ?

JH.