If you are using the pulse to estimate the transfer function of a system
and you do not want to have to factor out the squared off pulse, the
shorter the better. This is to be balanced against spreading the energy
out so much that you have to nearly overload the measured system with
the pulse
Normand Martel wrote:
> I've made a such pulse stretcher to render the 1ms
> pulse from a CMC Superstar and the 10µS pulse from a
> Trimble Lassen SK8 visible via an L.E.D. by using a
> simple 555 timer configured in a monostable fashion.
>
> Sure it is not nanosecond precise and i'm not sure AT
>
I've made a such pulse stretcher to render the 1ms
pulse from a CMC Superstar and the 10µS pulse from a
Trimble Lassen SK8 visible via an L.E.D. by using a
simple 555 timer configured in a monostable fashion.
Sure it is not nanosecond precise and i'm not sure AT
ALL it will react to a 20ns pulse,
Is your PPS signal too short to trigger your serial port? Is that
what's troubling you, Bunkie?
If so, the new TAPR FatPPS is the answer you've been looking for...
The FatPPS is a DB-9 "dongle" that implements a pulse stretcher. Input
signals as short as 20 nanoseconds produce an output pulse a
