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| bdunham7:
--- Quote from: BillyO on January 03, 2023, 02:22:51 am ---Don't know if it's been mentioned in this thread before, but I had a use case tonight that only my analog scope could help me with and that is being able to trigger independently on two different channels at the same time. This is something better analog scopes can do but none of my DSOs can. Well, technically it's not triggering on both signals at exactly the same time, but in alternate mode it shifts the trigger to the channel it is displaying during that sweep. The effect is both signals, regardless of what frequency they are at, will be displayed properly. Can any DSO do this? --- End quote --- The Siglent SDS1152CML and and its cousins can do this and they can even have different timebases IIRC. It's rather unusual for a DSO, common on analog CROs. I haven't yet seen an actual use case where the SINGLE and ZOOM functions on a DSO couldn't accomplish the task, but I suppose it is possible that there is one. What were you doing? |
| BillyO:
I'm writing software for a 6502 based computer I designed to run two digital to analog converters but was (am) having some issues with the outputs of the two converters going bonkers at times. It's a software problem, but I wanted to see if it happened at specific frequency combinations .. and it does! So, now I just have to bend my brain around the assembly code and find the bug(s). |
| nctnico:
--- Quote from: BillyO on January 03, 2023, 02:22:51 am ---Don't know if it's been mentioned in this thread before, but I had a use case tonight that only my analog scope could help me with and that is being able to trigger independently on two different channels at the same time. This is something better analog scopes can do but none of my DSOs can. Well, technically it's not triggering on both signals at exactly the same time, but in alternate mode it shifts the trigger to the channel it is displaying during that sweep. The effect is both signals, regardless of what frequency they are at, will be displayed properly. Can any DSO do this? --- End quote --- Yes. DSOs from GW Instek have this feature. It can be handy in some situations; I have used it a couple of times. |
| Whitefoot:
Even my Owon SDS7102 has ALTernate sweep triggering and can trigger on 2 independent signals, both getting the same sweep rate. You have to be careful thinking of the signals as being displayed properly, since I don't think they are time coincident due to the ALTernate triggering. |
| bdunham7:
--- Quote from: Whitefoot on January 03, 2023, 05:04:19 am ---You have to be careful thinking of the signals as being displayed properly, since I don't think they are time coincident due to the ALTernate triggering. --- End quote --- Yes they aren't. That's why using a single-shot capture with zoom is often more useful. Still there may be times when alternate trigger is the easiest way. |
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