need help with oscilloscope selection

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dev
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need help with oscilloscope selection

Post by dev » Wed Aug 09, 2017 4:32 am

Hi,
I wanted to have digital oscilloscope. I was using CRT based and it is gone now.
Please suggest some cheap and best oscilloscope to use. Which oscilloscope is good PC based or DSO oscilloscope?

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Pito
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Re: need help with oscilloscope selection

Post by Pito » Wed Aug 09, 2017 6:26 am

The oscilloscopes cost between $250 - $1mil.
What do you want to spend? N. of Channels? Bandwidth (MHz)? Samples/sec (Gs/s)? Mixed signal (analog+logic analyser)? Memory (few kB - 150MB - unlimited (pc based)?

Good forum to read / ask: http://www.eevblog.com/forum/testgear/
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RogerClark
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Re: need help with oscilloscope selection

Post by RogerClark » Wed Aug 09, 2017 7:50 am

FWIW...

I bought a RIGOL DSO a few years ago which had a 16 channel logic analyser.

But I never use the logic analyser, I bought a PC dongle logic analyser and its much more useful, as the software that can analyse the data, not just view the 1's and 0's

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Re: need help with oscilloscope selection

Post by ChrisMicro » Wed Aug 09, 2017 9:11 am

I have a Rigol DS1052E which is quite nice.
But meanwhile I would by a the more capable Rigol DS1054Z because it has 4 channels, has a larger Display and can be hacked for higher bandwidth.
This one
http://hackaday.com/2017/08/08/touchscr ... illoscope/
sounds funny to play with.

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RogerClark
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Re: need help with oscilloscope selection

Post by RogerClark » Wed Aug 09, 2017 10:18 am

@ChrisMicro

I have the 100Mhz version with logic analyser DS1102D, its a good scope, but the DS1054Z looks really nice, but I'm not sure how many people need 4 channels.
I'd rather have 100Mhz and 2 channels, but the 100Mhz Rigol scopes are considerably more expensive

dev
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Re: need help with oscilloscope selection

Post by dev » Wed Aug 09, 2017 2:37 pm

Thanks,

Lower bandwidth is Ok for me right now like 10Mhz or near to that. But till what level this frequency will be helpful?
i don't know that much. because for very less time i used oscilloscope.
2-4 channel (not yet decided). Because i used 2 channel only and i had 2 channel only.
not required to have integrated LA in that for me.
i'd love handy useful oscilloscope.

ChrisMicro
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Re: need help with oscilloscope selection

Post by ChrisMicro » Wed Aug 09, 2017 2:55 pm

I'd rather have 100Mhz and 2 channels, but the 100Mhz Rigol scopes are considerably more expensive
Ähm .. well.. there is this hack:
http://hackaday.com/2014/11/12/how-to-g ... l-ds1054z/

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Pito
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Re: need help with oscilloscope selection

Post by Pito » Wed Aug 09, 2017 3:51 pm

An oscilloscope is an investment for say 5-10y.
100MHz is an absolute minimum today when messing with mcus (for example you will hardly see 36MHz BluePill's SPI clock), 300MHz (2+Gs/s) is good for next few years.
For example DS2072A is a good candidate - hackable till 300MHz, large screen, a lot of features, dual channel.
Except Rigol there are other "cheaper" brands, but usually they cannot be hacked so quite expensive at 300MHz.
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Just4Fun
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Re: need help with oscilloscope selection

Post by Just4Fun » Wed Aug 09, 2017 6:03 pm

Hi,
I've a Rigol MSO2072A. It should be hackerable too... but I haven't done it for now... (it came with all the sw options included for free... it was a special offer...). I wanted an LA too so I've chosen this one.

Here some photo and video using the LAN remote control (very useful...) and some advices how to install the needed sw (I used a VM over a linux host): http://www.stm32duino.com/viewtopic.php?f=45&t=858

ag123
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Re: need help with oscilloscope selection

Post by ag123 » Wed Aug 09, 2017 6:06 pm

as stm32f407ve has a rather fast ADC (3×12-bit, 2.4 MSPS A/D converters) and that it has quite a bit of ram i'm thinking if it might after all be quite feasible to do a cheap storage scope, i.e. 2.4 msps x 3 ~ 7.2 msps, that would enable sampling signal frequencies up to 3.6 mhz being a nyquist rate
the boards could be the stm32f407vet black or stm32f4 discovery
http://wiki.stm32duino.com/index.php?ti ... 4xx_boards
for 'continuous' sampling, a usb 2.0 ulpi chip/module and interface may be necessary to push the usb limits of 200 mbps, but i'd guess it'd need really good usb cables and construction (and i don't think there is 'arduino' style libraries for it yet, it'd likely mean using st's cube mx hal codes for that)
https://www.ebay.com/sch/i.html?_nkw=USB3300&_sacat=0
the data could be simply transmitted to the pc over usb-serial and plotted say using processing
https://processing.org/
or even simpler plotted on the arduino ide using the 'serial plotter' under tools

my guess is for a logic analyser with simply 0 and 1, a f407 may be able to just pull that off at 42 mhz (using the SPI pin), i'm not sure if it could go any faster with gpio pins

stm32f303, stm32f3 discovery has even more impressive adc capable of 4adc x 5msps, unfortunately the f3 discovery board is a stm32f303vc which sports only 48k of sram
http://www.st.com/en/evaluation-tools/s ... overy.html

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