06-11-2017, 04:05 PM
(This post was last modified: 06-11-2017, 04:06 PM by ppppenguin.)
Makes you think about the hostory of storage scopes. Analogue storage scopes using special CRTs were troublesome beasts but a useful alternative to cameras in sme applications. Then fast forward to today's digital scopes where even modest instruments like the Rigol 1054Z at under £300 have tremendous storage capabilities. Or the PC based scopes which outsource much of the work to a host computer with essentially unlimited memory. Still need a good analogue front end and sampling system.
A lot depends on whether you're tring to capture a "one shot" event or just want a record of a fairly repetitive waveform. The former needs true nyquist sampling, at least twice the highest frequency of interest. The latter can use equivalent time sampling, something that was pioneered on things like the Tek 1S1 1GHz sampling plugin for 500 series scopes.
Useful article on sampling. Note the use of an analogue scope to verify the results of a sampling scope.
https://www.tek.com/document/application...e-sampling
A lot depends on whether you're tring to capture a "one shot" event or just want a record of a fairly repetitive waveform. The former needs true nyquist sampling, at least twice the highest frequency of interest. The latter can use equivalent time sampling, something that was pioneered on things like the Tek 1S1 1GHz sampling plugin for 500 series scopes.
Useful article on sampling. Note the use of an analogue scope to verify the results of a sampling scope.
https://www.tek.com/document/application...e-sampling
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
