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| Considering a new Rigol DHO924 vs. Siglent SDS120X-E model - Any Bug stoppers? |
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| KungFuJosh:
--- Quote from: radiohomebrewer2000 on March 08, 2024, 12:30:13 am ---Video showing what I mean. The link to the video starts in the middle of the video to show what I am talking about. Siglent may not be advertising this even though it is included (or maybe not) because it is not a "new" feature. https://youtu.be/2F-qECVs5L0?t=244 See the FFT Math - Marker type of Peak - Table - sort by amplitude --- End quote --- Rob responded- he said you can have up to 10 peak markers, and Performa01's thread shows a ton of examples, including the FFT peak markers you asked about. BTW- don't buy Siglent probes. Check out probemaster.com for nicer probes if you need them. |
| Fungus:
--- Quote from: radiohomebrewer2000 on March 05, 2024, 10:48:17 pm ---Hello, There seems to be 2 topics related to the Rigol DHO800/DHO900 series scopes. One topic only allowS discussion of the bugs in the Rigol DHO800/DHO900 series scopes. The other seems about unboxing, teardown, and hacking. Neither topic seems suited to my question. I heard there are bugs in the Rigol DH0924. --- End quote --- I wouldn't buy a DHO900, I would buy a DHO800. You can get the cheapest model and "upgrade" it to any other in a few minutes over Ethernet. The only thing I know that simply doesn't work is video triggering. Apart from that everything else is minor annoyances. Some settings aren't remembered when you power off, serial decode needs you to set probe ratio to 1x for the threshold level to be displayed correctly. Half a dozen things on that level. Apart from that it's awesome. I'll take those niggles over any old fashioned 'scope under $1000. The future is here and I'm not going back. |
| ebastler:
--- Quote from: Fungus on March 08, 2024, 06:22:52 am ---I wouldn't buy a DHO900, I would buy a DHO800. [...] The only thing I know that simply doesn't work is video triggering. Apart from that everything else is minor annoyances. --- End quote --- Since we have established that FFT is of specific interest to the OP, I think that alone tips the scales in favor of a Siglent scope in this case. The lack of FFT averaging and peak detect modes, sometimes inconsistent parameter settings, and dubious window functions are major drawbacks in Rigol's FFT implementation. I highly recommend the new SDS804X HD, with the possibility to do a "free upgrade" to the 200 MHz SDS824X HD version. In that respect I agree with Fungus: "The future is here", including 12-bit and touch interface capability, so I would no longer buy the SDS1...X-E series. Don't be deterred by the fact that the 800X HD series is new. The software is essentially the same as on the well-established higher end models, and actually is more mature than Rigol's DHO800/900 series. (Or Rigol's 1.5-year-old DHO1000 series, for that matter.) In fact, I have only seen one issue, in a rather exotic operating situation, described on the forum so far. |
| tautech:
--- Quote from: radiohomebrewer2000 on March 08, 2024, 12:30:13 am ---Video showing what I mean. The link to the video starts in the middle of the video to show what I am talking about. Siglent may not be advertising this even though it is included (or maybe not) because it is not a "new" feature. https://youtu.be/2F-qECVs5L0?t=244 See the FFT Math - Marker type of Peak - Table - sort by amplitude --- End quote --- Sorry, been busy...... Zero signal but attached screenshot should give some idea of Marker capability and the FFT Tools menu. |
| radiohomebrewer2000:
Thanks. I am sold on a Siglent SDS800X-HD! Great information and screenshots coming from Performa01, Tautech, and others. Now, I am just thinking of the model. I do not need the top model because I can "upgrade" later to a higher bandwidth but that would require buying scope probes that can handle that higher bandwidth. Plus US$799 is too much for me to spend. And finding an authorized Siglent seller in the USA that has the scopes in stock... These scopes sell out fast when they get a few in stock I have noticed... So, I have been eyeing Saelig but their site does not indicate in stock or not. I may have to call them to find out. Tequipment does indicate whether they are in stock or not. But, with Saelig, I have their discount code from EEVBlog. Amazon has a really good limited time deal for US$579 for their Siglent SDS1204X-E. And if SDS800X HD series model had not come out, I would have already pounced on that! No joke. Some hams are telling me - I do not really need 4 channels, but get as much bandwidth as you can. However, the 2-channel SDS800X HD scopes do not include a Ext trigger input. Why did Siglent omit this? So, I may need to go with 4-channel after all. I think 70 MHz should be good enough for ham bands like 80, 40, 30 - and just maybe 20m as well? This would be 3.5 MHz, 7 MHz, 10 MHz, 14 MHz. Sure, there are other HF bands (Shortwave) that would be interesting to build like a 15 meter (21 MHz) but these bands depend on good sun spots to be open. Granted 2024 and 2025 are good years for sun spots. I heard that the bandwidth of the scope should be 4 or 5 times the frequency you will measure. And then someone else said 10 times. So, hopefully 70 MHz is good enough. If not, I can always "upgrade" to 100 MHz or 200 MHz and get the scope probes for that. And I do not necessarily have to get all 2 or 4 probes for 200 MHz. Just get what I need for whatever scenario. So, I am thinking of a SDS804X HD or SDS814X HD. Well, at least I have seen the SDS814X HD in stock. The others sell out quickly. My current oscilloscope is a HP 54600B 100 MHz 2-channel digital oscilloscope. Made in early 1990s I think. I scored it off ebay for $55 in 2022. Surprised it worked! I have been eyeing the Siglent scopes for awhile though. However, measuring a VFO signal above 2 MHz was not stable using my HP 54600. The measurement bounced around - both the frequency and voltage. I heard the Siglent SDS1000X-E scopes provide a more stable reading. And I am hoping the SDS800X HD scopes provide even more stability. So, if there is any big reason why I would get this scope - this is it! Because the frequency from my HP 54600 scope was bouncing around, I had to switch to my HP 5314A frequency counter to measure a stable frequency. Do not get me wrong - I am happy with my HP scope - it is my first scope. And when I needed to see the waveform of my crystal tester I home brewed, it showed the wave form, frequency, and voltage. The crystal tester was basically a Colpitts oscillator. Or, I am not doing a measurement properly? I just do not know. I am an amateur after all. But I do want to learn these things because I want to get to the point I can design my own radios. Thoughts anyone? Thanks, - Daniel |
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