What is PWM input with very high resolution?

If someone says they are trying to read PWM input with very hig resolution(2 ^ 30), I think they meant 2 ^ -30. What does very hig resolution mean here? They are trying to read low frequency hig resolution signal, what does that mean? I know what PWM signal is and wha low frequency is, but please explain high resolution? Maybe provide a exmaple?

Thanks.

High resolution PWM sampling could mean, that someone can measure the duty cycle with high resolution. E.g. with a resolution of 2^30 it would be possible to measure differences of 100%/2^30 in the duty cycle, which I think is impossible or at least very very expensive.

Could it be they simply mean the number of bits used for the data acquisition ?

Is there a reason why you can't ask them yourself?

The nature of your question suggests that either you or they are at least a little bit confused.

As suggested, it depends on how quickly you want the answer.

If this is a stable (slowly changing) PWM, then you can sample over many cycles and total the HI and LOWs (assumes uncorrelated sampling)

If you want to see state of the art, look at Agilent (ex HP) Frequency Counters. These deliver 10-12 Digits per second, and resolve to 150ps

You could even do this Analog, these days, the TI ADS1282 specs 31 bits of Analog Precision, (no missing codes).

Also, keep in mind how the PWM Originated, as there will be a jitter/noise figure for the signal you are measuring.

-jg

"> You could even do this Analog, these days, the TI ADS1282

If the OP doesn't even understand the concept of pwm resolution, how is he going to make use of a 31 bit A/D ?

Quick, tell me who is selling a 31 bit A/D, and for how much? :-)