[time-nuts] Timelab, two SR620s and losing samples
phk at phk.freebsd.dk
Mon Jan 18 03:05:20 EST 2016
In message <email@example.com>, "John Miles" writes:
>By timing issues,
>I wasn't referring to layer-1 handshaking, but rather the interplay
>between the GPIB software application, the network or bus connectivity
>between the app and GPIB controller, the controller itself and its
>firmware, and an addressable counter that returns each measurement
>only in response to a command from the app.
If your measurements are timing sensitive at or below milliseconds,
you should *always* pace them with an external trigger. They didn't
add that input just to take up space.
If you insist on pacing via the GPIB, the protocol has a primitive
for that, TRG, which is usually hardwired to the external trigger
circuitry in quality instruments.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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