After a restart, it would apparently want to load that last used state (maybe waited for a trigger to happen to fill in that buffer?), and that took ages. But eventually it booted.that means, last setting is stored somewhere not in sd card. but where? we need to find a way to zero those memory..In the SRAM chip. I assme they don't want to wear the flash out by writing to it after every single twist of a knob.
save setting at every "Power Off" button, not every knob twist.
It's neither. I have tested the following scenarios:
1) change vertical scale, immediately pull the power cord
2) change vertical scale, immediately press the (soft) power button twice
3) change vertical scale, wait a couple of minutes, press the power button twice
Only in scenario 3 the change was saved. This is an indication that a buffer + interval save algorithm may be used.
So how about scenario 4: change scale, wait a couple of minutes, then pull the power cord?
If it still remembers the settings change, then saving them is purely timeout-based.
So how about scenario 4: change scale, wait a couple of minutes, then pull the power cord?
If it still remembers the settings change, then saving them is purely timeout-based.Yes that's exactly what happens. It does not need the power button to be pressed for the settings to get saved, but it appears to need some time to pass after a change is made.
It's a very short time, certainly much less than "a couple of minutes".
I'd also be very surprised if the settings aren't checksummed against corruption.
What I am observing is that, using the SPi trigger mode, the Hex value overlaid on the SPI waveform is inconsistent even with a very solid displayed waveform. [...]
The obvious thing to check is that the SPI is triggered on the correct edge, but looking at my data it is clear I have the correct setting for that.
I keep returning to this thread with an increasingly forlorn hope that there'll be a spectacular firmware rabbit pulled out of a hat at some point, making my DHO924S more than a desk ornament one day.
Should I consider this scope a write-off?
I keep returning to this thread with an increasingly forlorn hope that there'll be a spectacular firmware rabbit pulled out of a hat at some point, making my DHO924S more than a desk ornament one day.
I keep returning to this thread with an increasingly forlorn hope that there'll be a spectacular firmware rabbit pulled out of a hat at some point, making my DHO924S more than a desk ornament one day.
Should I consider this scope a write-off?have you purchased siglent sds800x-hd and LA module? since iirc your job is mainly LA, so i hope you can make comparison how far off dho900 compared to sds800x+LA. and i think your life need to move on rather continuously depending on crippled dho900 as i understand your situation from previous descriptions. but for us who dont really depend our life on LA (serial nor parallel) serious work, we hope there will be FW fix in the future. so we will put our dho800 in box for a while since person like me still have DS1054Z to work with. and since they are so much affordable now like smartphones, if i'm going crazy, i'll get one sds800x-hd to try, or even to use it as main bench scope if its really that good, ymmv. (the problem with sds804x or sds824x is they keep disappearing (out of stock) from aliexpress when i want to look for them)
Although this scope isn't bad, I have a couple of comments about the optional LA and AFG.
If you're thinking of adding the LA to make it an MSO, I find the LA on this scope to be very weak indeed. For an MSO at this level, I consider the older Rigol DS1000Z+ with LA probes to be a significantly better solution. On the 1104X-E, the UI performance grinds to a halt with the LA attached and it's a substantial extra package to carry about that can't help but take up bench space.
Similarly, the external AFG on the Siglent also is nowhere near as neat as the Rigol's internal dual channel unit, but you have to buy the Rigol's at the time of scope purchase.
So if you're only looking for a 4 channel scope only, the Siglent is definitely a better than the Rigol DS1000Z series. Just that I find the LA and AFG on the Siglent are rather disappointing.
So I do already have an SDS1204X-E with the external SLA1016 LA pod, and I find the LA implementation to be a horrible implementation with plenty of functional and non-functional limitations. As far as I can tell, the SDS800X-HD has a very similar form factor to the SDS1204X-E, and uses the same LA pod.
So I do already have an SDS1204X-E with the external SLA1016 LA pod, and I find the LA implementation to be a horrible implementation with plenty of functional and non-functional limitations. As far as I can tell, the SDS800X-HD has a very similar form factor to the SDS1204X-E, and uses the same LA pod.100% and exactly where the similarities end....
[img]...
So I do already have an SDS1204X-E with the external SLA1016 LA pod, and I find the LA implementation to be a horrible implementation with plenty of functional and non-functional limitations. As far as I can tell, the SDS800X-HD has a very similar form factor to the SDS1204X-E, and uses the same LA pod.100% and exactly where the similarities end....
[img]...i wish parallel LA (in dho800/900) can show hex or dec value at each digital transition so i dont have to decode myself. much like serial LA decoding function/UI... your screenshot of siglent scope also show lack of parallel LA decoding, or is it turned OFF?
I wonder how the Rigol would compare to the siglent with the following measurement:
- A squarewave at 10Hz, with a level from 0 - 6.6V (maybe interleaved with a 3.3V level) and 50% duty.
- Zoomed in to 0V at a scale of 20mV.
I wonder how the Rigol would compare to the siglent with the following measurement:
I wonder how the Rigol would compare to the siglent with the following measurement:
- A squarewave at 10Hz, with a level from 0 - 6.6V (maybe interleaved with a 3.3V level) and 50% duty.
- Zoomed in to 0V at a scale of 20mV.It would not compare at all, because the Rigol cannot do vertical zoom. Count your blessings!
I wonder how the Rigol would compare to the siglent with the following measurement:
- A squarewave at 10Hz, with a level from 0 - 6.6V (maybe interleaved with a 3.3V level) and 50% duty.
- Zoomed in to 0V at a scale of 20mV.
- Avaraging function activated
See the picture attached.