Siglent SDS800 Zoom out question (problem?)

[frank2644]

A couple of years ago I bought a Siglent SDS1104X-e and it has performed very well for me with one notable exception. That is, the ability to zoom out to examine events that happened just prior to trigger and outside the screen view area.  Dave had a video describing this shortcoming and he seemed to think that was a significant disadvantage. Sure there are workarounds, like recapturing using a longer sweep rate, but I have found that annoying over the years.

Here’s Dave’s explanation of the problem.


I am considering buying the SDS800 but I’m wondering if it has the same zoom out problem?

Thanks,
Frank

[KungFuJosh]

Look at History mode on the Siglent. I think that applies to your old scope also.

[frank2644]

Look at History mode on the Siglent. I think that applies to your old scope also.

Yes, I have a History key but I have not been able to figure out how to use it. I think you have to start the trace and then turn on history mode. However that seems to stop the trace and that implies human detection of an event is necessary. Further when it stops if the Horiz sweep is fairly slow (>5ms) it doesn't capture  any frames. And I don't think it works at-all in single sweep mode. In summary, it seems too complicated and limited to be useful. Having a zoom out seems a lot simpler and doesn't require any setup.

If anybody knows if the SDS800 supports zoom out please advise.

Thanks for replying
Frank

[Fungus]

I am considering buying the SDS800 but I’m wondering if it has the same zoom out problem?

It's the Siglent way.

[tautech]

I am considering buying the SDS800 but I’m wondering if it has the same zoom out problem ?

Problem it isn't, it's just the way these low cost Siglents work, just as LeCroy and IIRC Pico too.

SDS800X HD to SDS2000X Plus all work the same but higher models offer a Fixed Mem Depth acquisition mode to provide the zoom out feature.

However you will find SDS800X HD Zoom mode more powerful than the earlier X-E series.