My Extech MM560 measures to .0001 Hz and +/- .008% + 4 digits accuracy,
which isn't bad. Lowest measurement range is 5 Hz though.
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.comThe Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com > -----Original Message-----
> From: Paul Schreiber [mailto:synth1@...]
> Sent: Saturday, April 24, 2004 12:49 AM
> To: 'rreprobate'; motm@yahoogroups.com; John Loffink
> Subject: Re: [motm] Frequency counter
>
> You need a counter with a 'reciprocal time base'. Instead of
> gating/counting
> pulses, it measures the ∗period∗ of the waveform and ∗calculates∗ the
> frequency.
> In typical MOTM overkill fashion, I use a Philips/Fluke model PM6666
> counter
> which can measure down to 0.001Hz :) and at 0.1Hz resolution make 1,000
> measurements/sec :))
>
> This is a 10yr old model, I paid about $900 new but eBay has them every
> now and
> then for like $350.
>
> Paul S.