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o scope for someone starting out 200-400$
jasonRF:
Another standard option is the siglent sds1104x-u. It doesn’t have all the features of the sds1104x-e, but it is cheaper. Right now it is $315 from amazon
https://www.amazon.com/Siglent-Technologies-SDS1104X-U-Phosphor-Oscilloscopes/dp/B08PD3WKCZ?th=1
Bionicbone:
The thing that sways me away from Siglent to Rigol in this price range is the memory depth. But maybe I am missing something. Siglent state 14mpts (2 X 7mpts for 4 ch) and Rigol just state 24Mpts. I'll do some bus work so thinking 24Mpts is a key factor. Would you experienced guys agree? Or is there something about Siglent scopes that you think is a better trade ? Also I remembered Siglent support more decoders, I'm very interested in CAN Bus support.
james_s:
--- Quote from: Bionicbone on March 21, 2023, 06:31:38 am ---The thing that sways me away from Siglent to Rigol in this price range is the memory depth. But maybe I am missing something. Siglent state 14mpts (2 X 7mpts for 4 ch) and Rigol just state 24Mpts. I'll do some bus work so thinking 24Mpts is a key factor. Would you experienced guys agree? Or is there something about Siglent scopes that you think is a better trade ? Also I remembered Siglent support more decoders, I'm very interested in CAN Bus support.
--- End quote ---
14mpts is *huge* from my perspective. My main scope has the deep memory option which gives it 8mpts which was massive at the time it was made and I very rarely make use of anywhere close to that. What do you need so much capture memory for? It's a scope, not a chart recorder.
If you're interested in capturing and decoding buses get a logic analyzer, the cheap USB ones are quite capable and will do a better job at this task than just about any scope. Use a scope when you want to check signal integrity.
tautech:
--- Quote from: Bionicbone on March 21, 2023, 06:31:38 am ---The thing that sways me away from Siglent to Rigol in this price range is the memory depth. But maybe I am missing something. Siglent state 14mpts (2 X 7mpts for 4 ch) and Rigol just state 24Mpts. I'll do some bus work so thinking 24Mpts is a key factor. Would you experienced guys agree? Or is there something about Siglent scopes that you think is a better trade ? Also I remembered Siglent support more decoders, I'm very interested in CAN Bus support.
--- End quote ---
You need be aware some lower priced DSO's use a single ADC and others use 2 ADC's each with their own memory support.
Eg. SDS11/1204X-E uses 2 ADC's each with 14 Mpts memory support.
With this configuration 2 channels, one on each ADC can be provided with 14 Mpts mem depth on each. However engage a 3rd or a 2nd channel on the same ADC and everything halves, sampling rate and memory support.
The work around for some is to provide more memory when a single ADC is used however when a 2nd channel is activated sampling rates are halved, something a dual ADC DSO doesn't suffer from when channel allocation is used wisely.
Bionicbone:
https://youtu.be/wZQj7TnWVNg I think a really good side by side comparison tests between the DS1104Z Plus and SDS1104X-E. Each seems to be better at different things. Rigol gets to 160mhz at -3db and 400mhz showing a signal. The Siglent is 117mhz and 140mhz bombs out. But the speed of the Siglent is much better, he says brighter screen, faster updates, but there sometimes seems some display issues on square waves (need to watch that bit again). I think when I first looked at this video I was drawn to the 400mhz thing just mentioned and memory but now I'm questioning memory especially given the responses below. Is the 400mhz thing a big positive that would sway the experts?
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