Products > Test Equipment
Is the RiGOL DS1054Z still Dave's choice for under $500?
Karel:
22 seconds for 24 MiB is still laughable. But I guess it's all they can do for that price.
And for the price it's a nice hobby scope.
nctnico:
--- Quote from: Karel on November 27, 2022, 09:06:20 am ---One thing I don't like about the DS1054Z is that the serial decoding is done only on what is visible on the screen.
And if the screen trace does not start just before the start bit, the decoding fails.
This means that if you capture a long string from a serial port you can only decode the beginning of that string.
I find that very annoying when debugging a board.
--- End quote ---
Yes, when choosing a DSO for decoding, make sure it does full memory decoding, not just what is on screen. Otherwise you'll suffer when needing to inspect parts of packets to verify timing of the signals.
markone:
--- Quote from: RoGeorge on November 27, 2022, 09:28:53 am ---
--- Quote from: markone on November 27, 2022, 09:20:24 am ---DS1054Z ... quite slow ... remote control
--- End quote ---
Can you give an example of how slow it is, or what bothers exactly when remote controlling the DS1054Z?
Asking because I've tried recently to download the full 24 million ADC samples, and with the proper setup it went from 22 minutes to 22 seconds.
--- End quote ---
To be honest I never tried to dump raw data, but the interval time that you report seems a lot out of place (to say the least), AFAIK Dsremote is much faster in that.
I was instead referring to screen waveforms data retrieve and setting command response in general, among the causes it's kwon that Rigol choose to organize data in 64 bytes block on USB interface while the standard is 512, at the expense of data transfer performance.
Talking instead about serial decoder there is a lag in the order of hundreds of milliseconds, that varies with memory depth, horizontal scale and baud rate, often you can see decoded data not aligned with signal trace.
But we are talking about an old instrument, it's to be said that Rigol DS1000 and the DS1000Z series were the best instruments in the low cost class, at the time mostly populated with a ton of crap.
Fungus:
--- Quote from: markone on November 27, 2022, 02:14:51 pm ---
--- Quote from: RoGeorge on November 27, 2022, 09:28:53 am ---Asking because I've tried recently to download the full 24 million ADC samples, and with the proper setup it went from 22 minutes to 22 seconds.
--- End quote ---
To be honest I never tried to dump raw data, but the interval time that you report seems a lot out of place (to say the least), AFAIK Dsremote is much faster in that.
I was instead referring to screen waveforms data retrieve and setting command response in general, among the causes it's kwon that Rigol choose to organize data in 64 bytes block on USB interface while the standard is 512, at the expense of data transfer performance.
--- End quote ---
Screen waveform is only 1200 bytes so it's obviously a lot faster than grabbing the full 24Mb.
IIRC you can grab the full screen image about 3 times/sec. for remote control/viewing
USB was also found to be much slower than Ethernet, probably for the reason you mention.
Fungus:
--- Quote from: Monkeh on November 26, 2022, 02:53:11 pm ---Now imagine that it's near impossible to get it to decode correctly, and the triggers only work on blood moons.
--- End quote ---
We get it. It doesn't decode full memory, for that you need something else.
But: "Horses for courses".
For decoding a few bytes and looking at signal integrity it works just fine.
Using a logic analyzer would have been a complete pain in the ass for coding an I2C interface like I was doing last week.
For only $6 extra you can have both.
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