Hi All, thanks for watching this video, please consider subscribing to the channel and please hit the like button if you found this video useful. I will be releasing a series of videos with this scope over the coming weeks showing things like SBUS, I2C and FPV on the oscilloscope so please check them out as well. I have also been asked what this scope is like compared to the Siglent SDS1202X-E, t is a tough choice this and I was looking my self. The Siglent is a newer scope overall but the Rigol is based on some very established models. I have also seen some comments on the Siglent reliability but can’t comment on that my self. The Siglent has a few more decoding features but the Rigol has larger memory depth, overall they are VERY close and you would be happy with either most likely. For info on both models checkout Telonic in the uk at www.telonic.co.uk and they should be able to help you.
I have one, picked it up in May, and I have no complaints. I do a lot of different things, but I repair a lot of audio equipment and this scope does it's job very well. My 1st scope was in '93, a Kenwood CS-4025, a two channel 20Mhz unit, it was great but it's nice to have the storage ability for grabbing intermittent signals . Bang for buck it's a great product in my opinion. Good review.
Sir: Permit me to thank you for your inordinately well presented review. You maintain a regular voice level, & you articulate exceptionally well. I have two 200 mHz scopes (both Tektronix) , & I simply want to get rid of them as well as other quality instruments that work well but are old , large & really need to be overhauled, caps changed, out of tolerance resistors etc. I will give these to one of the ham radio clubs & buy new equipment. Your review has settled my purchase. I have Rigol spectrum analyzers, & they are excellent. Cheers! from Canada
The DC / AC coupling mode on the input isn't about measuring AC or DC voltages, nor are there "Ground" based signals. The GND selection is typically used to "zero" that scope input when you're doing some clever Math thing using multiple channels.
Thanks! This review stands head and shoulders above the others I have watched which would drive me up the wall with 10 mins of how to take it out the packet at the moment I have a Tektronix TBS 1042 limited to 40MHz. I now need a 200MHz for some fast circuitry.
From an old school HP and Techtronic's guy, its amazing the features you get for this amount of money. Well done and great instructional video! Cheers.
thanks for this video, I subscribed because of how clearly you explain all the buttons/knobs. I was trying to decide between this and a hantek DS02D15 with waveform . this helps a lot. this is $%0 more than the Hantek though.
Nice clear video, - maybe zoom in a bit more on the screen to read the text. I'd also like to see its limits, like the -3dB bandwidth, measuring the min rise time, smallest measurable signal, and such. Is the vertical sensitivity for this scope 500uV/div (X1 probe)? That would be better than most scopes. The servo measurements had a noisy baseline. I wouldn't be concerned because it is likely due to a poor probe ground. One of the reasons to keep the ground clip short. In fact the signal may be cleaner if the ground clip was on the probe tip ground. For high frequency or low level signals, a small piece of stiff wire soldered on a ground near the signal to the ground by the tip is best. In this case, smaller is better.
Thanks for your presentation. I got one 4 weeks ago. I'm still amazed at the functionalities especially for this price. The only small annoyance I found so far, is a noisy fan and the fiddly handling of the sensitive tiny multi-function button (Intensitiy)
Thanks for the beautiful presentation, I am sure you covered elegantly the subject. I just have very hard time to see a scope creating a sinus signal with a 2.5 acquisitions. They are advertising 200 MHz with two channels with a 1 GSa/s. Theoretically the Nyquist theorem is respected but it seems 2.5 acquisition for a signal is lowest limit.
Thanks for the review/details. I was thinking of going with the $250 Hantek but seems like that thing has some firmware issues. Spent the extra $50 to grab this. 👍
I wanted to provide a quick update. So far this scope has been working out really great for my use. I've mainly been using this in robotics and RC projects to troubleshoot and resolve noise and other sensor signal timing related issues. So far, I haven't run in to situations where the 2ch and 200Mhz has been a limitation. Definitely recommend adding this to your workbench as a first/budget scope. You can always sell it off and pick up a better scope if you start running in to limitations as you build more complex projects. Edit: Damn, just checked the price on this and it's gone up to $370ish on Amazon. I grabbed it for $300.
Very good presentation, thank. I am very fond of Rigol test equipment. I have 2 Rigol scopes, and a nice Rigol bench multimeter and Rigol spectrum analyzer. Siglent is not too bad but I prefer Rigol.
After I watched this video for the first time, I ordered this 'scope from Telonic, which arrived today. I would really like to hear your fan, as mine sounds quite noisy. The info you give is far better than trying to wade through the manual However, you need to seriously slow down, then we stand more chance of learning. For instance, when you went through the acquire, cursor, display, etc buttons, you want so fast when disabling them and I struggled with that. I look forward to your tutorials, but please go to the loo first so that you are not in such a hurry :)
Thank you for the video, I think this is the most concise and accurate description. But completely on a different topic, can we measure switching transients which measure upto 4KV with a time duration of 50ns using 10X CAT II probes , or should we be using Differential probes. For your kind information I am measuring these transients that are effecting near GPIO pins of the micro controller. Any help or advice is most appreciated.
It is a tough choice this and I was looking my self. The Siglent is a newer scope overall but the Rigol is based on some very established models. I have also seen some comments on the Siglent reliability but can’t comment on that my self. The Siglent has a few more decoding features but the Rigol has larger memory depth. Overall they are VERY close and you would be happy with either most likely.
Is this a tutorial about total oscilloscope basics, or a review? You didn't even mention a single electrical thing specific to this one, only the help.
Ty! Does this osci has additional options to buy? The DS1054z had them and im not sure if i would be charged with those other functions if i need them. Thank you for the video! a very good usage explanation! :D
It does have the additional ones like serial decode ect . Mine came pre installed and I have seen most dealers say that’s the case as standard. Telonic do on their site.
you seem to have grown up with oscilloscopes as familiar you feel. have just 1 matek flightboard and therefore will follow what for I can use an oscilloscope ... like s-bus and so on. Therefore I will follow your series as the bloodiest amateur cause currently I have only a Nano Talon Evo with Kopilot + VTX400 and a dji goggles but not the fpv one. I have a Mavic 2 Zoom with racing edition that supports analog signal, I do not wanna buy a second pair of goggles. And then there is the Phoenix Ranger 1600 and a radiomaster with matek F405 I wanted to build this summer ...
Good review. So you said 300 volt max? Ive got a Fender Hot Rod Deluxe that has 450 volts dc and I would like to see any ripple on it. So you are saying that I cannot use this scope to do that? Any alternatives? Ive got a Tektronix 2215 and see that it has a max DC voltage input of 400V
That’s at X1 mode on the probe. You can simply go to X10 setting and you will be fine. That 300v input is at the port. The X10 setting allowed for X10 of that. If you wanted to be 100% safe with zero risk of issues you should use a Differental Probe. However just setting to X10 will be fine but just note that you will be grounding that to your mains Earth as well.
As i have just purchased this model !, and a fab review thanks butI think now in 2023 its hardly a budget oscilloscope at £354.00 hardly a budget Fnirsi are the budget price ! £124.00 but build quality is reduced
I just bought a Rigol DS1054Z. 50MHz are enough for my small works ( connected with a Micsig 1300V). What do you think about? I already saw your video about Differential probe.
New subscriber. Excellent video. I’m retired from the aviation world and have taken to a new passion electronics. I’m in the market for a mid priced scope. I have a tablet touch screen one but it’s not what I like. I need a device I can become one with and this looks like the one. I will be checking out the rest of your play list because you give a very clear and understandable video on what you are doing. Now does it come with a 110V US power plug? I would also like to purchase from a reputable source do you recommend your supplier? I’m taking courses reading books and just find the subject fascinating but like I said this is a whole new endeavor. Thank you for taking the time to share your videos and knowledge. Thanks in advance Artie 😊
▶ EEVblog #451 - RIGOL DS1052E vs DS2072 Oscilloscope th-cam.com/video/_TSr9nFN1GU/w-d-xo.html Apr 7, 2013 28:02 ----------------------------- CHANNEL: EEVblog th-cam.com/users/EevblogDave ; How much has oscilloscope technology developed in the past 5 years ? ; Dave compares the baseline $800 entry level scope from 5 years ago - ; the RIGOL DS1052E / DS1102E - to the current $800 benchmark the DS2072 ; Demos of intensity graduated display - waveform update speed - ; LXI Ethernet interface control and waterfall plots - segmented memory ; waveform replay mode - and more. ; Includes bonus gratuitous analog oscilloscope comparison. And please note: it is RIGOL and not Rigol So pay attention to detail - Be sure to exactly see what it is you are L00K-ing at Understand that ALL CORPORATE names are always in ALL CAPS Names of the living/loving Soul are in Mixed Case Letters CORPORATIONS are neither Loving nor Loving - as CORPORATIONS are a DEAD entity. The word CORPORATION derives from the {Latin} CORPUS - meaning CORPSE / DEAD Which is why the CORPSES in the Cemetery also have their name in ALL CAPS. One would have to study Law for many years to learn that, You are not taught this in CORPORATE GOVERNMENT indoctrination institutions aka: school - just to keep you dumbed down. As Pope Leo X stated _ "There are things not for the vulgar to know" In other words - not for the common people / peasants to know That is how such people / peasants are trapped in the Kings Court (Law Court) Common people fall into the trap because they have been programmed to be ZOMBIES - and not see - and be ignorant of the doctrines of the CORPORATE GOVERNMENT Religion - These doctrines are known as Statutes - i.e Man-Made Laws - That Man considers Superior to Gods Law - That is where the Evil is - in Man's Law - in total opposition to Natural Law - Steals all your inalienable rights you were born with and sells them back to you under License as privileges.
Thanks for the video I've just purchased the D's 1102 ZE but can't find a lot of information on it ,would you know if the only difference is that mine is 100 MHz and yours is the 200mhz .thanks again...
Im planning to get a scope..but im unsure if I should get 100mhz (DS1102Z-E) or 200mhz (this one). They are both identical except that spec. Price difference is 100 bucks. What are some examples of hobby work where 100mhz is not enough anymore? Im pretty sure 100mhz is more than enough for hobby/learning purposes..but i dont want to miss out and later have to buy another one.
There are people who do not speak English and read the translation, but can't they speak more slowly? Do you have to take the plane or train because it's late???
Dumb question: The 16MHz Arduino clock signal is a square wave. You measured a sine wave. Your scope is 200MHz, so we should have seen the square. Why didn't we?
Your audio is not good. Lot of time you voice is only spitting out air. Thang.....dool, tam.....bla bla.....you commentary is the worst. You could be a good writer but not a good commentator. you are not born for doing commentary. Listen to your own audio.
Thank you for the unhelpful feedback, while I always appreciate comments and feedback when its constructive, when its not then I dont. If you can do better please start a channel and post your own content so we can also give feedback.
@Shaider Riz not sur what's your problem, maybe you need a doctor checking your ears? Or maybe learn more English? I heard every single word he said, the sound is very good.
@@MadRC Well done haha, the audio and the video is perfect. Another thing i appreciate of the English is the pronunciation, Americans are harder to understand. Greetings from Argentina. By the way, i received mine 1202ze past saturday, i wonder if i can read spi with 2 channels.
Hi All, thanks for watching this video, please consider subscribing to the channel and please hit the like button if you found this video useful.
I will be releasing a series of videos with this scope over the coming weeks showing things like SBUS, I2C and FPV on the oscilloscope so please check them out as well.
I have also been asked what this scope is like compared to the Siglent SDS1202X-E, t is a tough choice this and I was looking my self. The Siglent is a newer scope overall but the Rigol is based on some very established models. I have also seen some comments on the Siglent reliability but can’t comment on that my self.
The Siglent has a few more decoding features but the Rigol has larger memory depth, overall they are VERY close and you would be happy with either most likely.
For info on both models checkout Telonic in the uk at www.telonic.co.uk and they should be able to help you.
I have one, picked it up in May, and I have no complaints. I do a lot of different things, but I repair a lot of audio equipment and this scope does it's job very well. My 1st scope was in '93, a Kenwood CS-4025, a two channel 20Mhz unit, it was great but it's nice to have the storage ability for grabbing intermittent signals . Bang for buck it's a great product in my opinion. Good review.
Sir: Permit me to thank you for your inordinately well presented review. You maintain a regular voice level, & you articulate exceptionally well. I have two 200 mHz scopes (both Tektronix) , & I simply want to get rid of them as well as other quality instruments that work well but are old , large & really need to be overhauled, caps changed, out of tolerance resistors etc. I will give these to one of the ham radio clubs & buy new equipment. Your review has settled my purchase. I have Rigol spectrum analyzers, & they are excellent. Cheers! from Canada
Thanks.
The DC / AC coupling mode on the input isn't about measuring AC or DC voltages, nor are there "Ground" based signals. The GND selection is typically used to "zero" that scope input when you're doing some clever Math thing using multiple channels.
Thanks! This review stands head and shoulders above the others I have watched which would drive me up the wall with 10 mins of how to take it out the packet at the moment I have a Tektronix TBS 1042 limited to 40MHz. I now need a 200MHz for some fast circuitry.
From an old school HP and Techtronic's guy, its amazing the features you get for this amount of money. Well done and great instructional video! Cheers.
I’ve just bought the same, I’m very happy with it.
Just dropped my DS1102E from desk height onto concrete garage floor. Still works.
Just got the scope and this video is a life saver! Thank you!
Excellent tutorial .. i am going to buy this oscilloscope
Very clear. Excellent delivery of info. Thank you.
thanks for this video, I subscribed because of how clearly you explain all the buttons/knobs. I was trying to decide between this and a hantek DS02D15 with waveform . this helps a lot. this is $%0 more than the Hantek though.
Nice clear video, - maybe zoom in a bit more on the screen to read the text.
I'd also like to see its limits, like the -3dB bandwidth, measuring the min rise time, smallest measurable signal, and such.
Is the vertical sensitivity for this scope 500uV/div (X1 probe)? That would be better than most scopes.
The servo measurements had a noisy baseline. I wouldn't be concerned because it is likely due to a poor probe ground. One of the reasons to keep the ground clip short. In fact the signal may be cleaner if the ground clip was on the probe tip ground. For high frequency or low level signals, a small piece of stiff wire soldered on a ground near the signal to the ground by the tip is best. In this case, smaller is better.
SUCH GOOD EXPLANATION I FOUND HERE
Thanks for your presentation. I got one 4 weeks ago. I'm still amazed at the functionalities especially for this price.
The only small annoyance I found so far, is a noisy fan and the fiddly handling of the sensitive tiny multi-function button (Intensitiy)
Thanks for the review, very helpful. I just ordered it after watching this review :)
That’s great. Hope you like it
Excellent tutorial; well explained and covered all major functionality. Thank you for this presentation.
Thanks for the beautiful presentation, I am sure you covered elegantly the subject. I just have very hard time to see a scope creating a sinus signal with a 2.5 acquisitions. They are advertising 200 MHz with two channels with a 1 GSa/s. Theoretically the Nyquist theorem is respected but it seems 2.5 acquisition for a signal is lowest limit.
Thanks for the review/details. I was thinking of going with the $250 Hantek but seems like that thing has some firmware issues. Spent the extra $50 to grab this. 👍
I wanted to provide a quick update. So far this scope has been working out really great for my use. I've mainly been using this in robotics and RC projects to troubleshoot and resolve noise and other sensor signal timing related issues. So far, I haven't run in to situations where the 2ch and 200Mhz has been a limitation. Definitely recommend adding this to your workbench as a first/budget scope. You can always sell it off and pick up a better scope if you start running in to limitations as you build more complex projects.
Edit: Damn, just checked the price on this and it's gone up to $370ish on Amazon. I grabbed it for $300.
Very good presentation, thank. I am very fond of Rigol test equipment. I have 2 Rigol scopes, and a nice Rigol bench multimeter and Rigol spectrum analyzer. Siglent is not too bad but I prefer Rigol.
Excellent video. I just ordered this and waiting for it to arrive.
After I watched this video for the first time, I ordered this 'scope from Telonic, which arrived today. I would really like to hear your fan, as mine sounds quite noisy. The info you give is far better than trying to wade through the manual However, you need to seriously slow down, then we stand more chance of learning. For instance, when you went through the acquire, cursor, display, etc buttons, you want so fast when disabling them and I struggled with that. I look forward to your tutorials, but please go to the loo first so that you are not in such a hurry :)
A good presentation and overview of this product. Very helpful as I'm about to purchase a scope to replace a dead Gould OS3600. Thanks
Thank you for the video, I think this is the most concise and accurate description.
But completely on a different topic, can we measure switching transients which measure upto 4KV with a time duration of 50ns using 10X CAT II probes , or should we be using Differential probes.
For your kind information I am measuring these transients that are effecting near GPIO pins of the micro controller.
Any help or advice is most appreciated.
I didn't see a Neflix button :-)
This made me lol
Mine just arrived and this video is a good guide..hope to see more.thanks
Congrats man it’s a great scope.
After watching this video I don't need to read the manual. Excellent.
Sehr gut Danke Gruß aus Bayern-:)
Rigol DS1202Z-E or Siglent SDS1202X-E ?
I really can't decide ..
It is a tough choice this and I was looking my self. The Siglent is a newer scope overall but the Rigol is based on some very established models. I have also seen some comments on the Siglent reliability but can’t comment on that my self. The Siglent has a few more decoding features but the Rigol has larger memory depth. Overall they are VERY close and you would be happy with either most likely.
@@MadRC ok thank you for your answer sir!
which one did you end up getting? I cant make up my mind either atm!
How about rigol1102z its almost the same with this except that its only 100MHZ
Is this a tutorial about total oscilloscope basics, or a review? You didn't even mention a single electrical thing specific to this one, only the help.
very helpful !!! thanks!!
Im divided between this and the 1054z, any advices ?
Ty! Does this osci has additional options to buy? The DS1054z had them and im not sure if i would be charged with those other functions if i need them. Thank you for the video! a very good usage explanation! :D
It does have the additional ones like serial decode ect . Mine came pre installed and I have seen most dealers say that’s the case as standard. Telonic do on their site.
Helpful video! thank you very much, sir!
I look forward to future videos of you using this oscope
Thanks much appreciated.
I think the bottom right is an external input trigger not a function generator?
you seem to have grown up with oscilloscopes as familiar you feel.
have just 1 matek flightboard and therefore will follow what for I can use an oscilloscope ... like s-bus and so on.
Therefore I will follow your series as the bloodiest amateur cause currently I have only a Nano Talon Evo with Kopilot + VTX400 and a dji goggles but not the fpv one. I have a Mavic 2 Zoom with racing edition that supports analog signal, I do not wanna buy a second pair of goggles.
And then there is the Phoenix Ranger 1600 and a radiomaster with matek F405 I wanted to build this summer ...
Good review. So you said 300 volt max? Ive got a Fender Hot Rod Deluxe that has 450 volts dc and I would like to see any ripple on it. So you are saying that I cannot use this scope to do that? Any alternatives? Ive got a Tektronix 2215 and see that it has a max DC voltage input of 400V
That’s at X1 mode on the probe. You can simply go to X10 setting and you will be fine. That 300v input is at the port. The X10 setting allowed for X10 of that. If you wanted to be 100% safe with zero risk of issues you should use a Differental Probe. However just setting to X10 will be fine but just note that you will be grounding that to your mains Earth as well.
hI, can we make use of it as a signal generator for tuning TX-RX on a repeater base or tune a duplexer?
Спасибо. Хорошее познавательное видео.
As i have just purchased this model !, and a fab review thanks butI think now in 2023 its hardly a budget oscilloscope at £354.00 hardly a budget Fnirsi are the budget price ! £124.00 but build quality is reduced
Yea there are some amazing scopes now in this price range. I may order one in to do a follow up review.
I just bought a Rigol DS1054Z. 50MHz are enough for my small works ( connected with a Micsig 1300V). What do you think about? I already saw your video about Differential probe.
Rigol make great scopes. You won’t go wrong with any of the models you choose as long as it has the bandwidth you need. Congrats
I didn't find triger alternate trigger?
Does it have free serial decoding like the siglent sds1202x-e?
Thank you sir
New subscriber. Excellent video. I’m retired from the aviation world and have taken to a new passion electronics. I’m in the market for a mid priced scope. I have a tablet touch screen one but it’s not what I like. I need a device I can become one with and this looks like the one. I will be checking out the rest of your play list because you give a very clear and understandable video on what you are doing. Now does it come with a 110V US power plug? I would also like to purchase from a reputable source do you recommend your supplier? I’m taking courses reading books and just find the subject fascinating but like I said this is a whole new endeavor. Thank you for taking the time to share your videos and knowledge. Thanks in advance Artie 😊
▶ EEVblog #451 - RIGOL DS1052E vs DS2072 Oscilloscope
th-cam.com/video/_TSr9nFN1GU/w-d-xo.html
Apr 7, 2013 28:02 -----------------------------
CHANNEL: EEVblog
th-cam.com/users/EevblogDave
; How much has oscilloscope technology developed in the past 5 years ?
; Dave compares the baseline $800 entry level scope from 5 years ago -
; the RIGOL DS1052E / DS1102E - to the current $800 benchmark the DS2072
; Demos of intensity graduated display - waveform update speed -
; LXI Ethernet interface control and waterfall plots - segmented memory
; waveform replay mode - and more.
; Includes bonus gratuitous analog oscilloscope comparison.
And please note: it is RIGOL and not Rigol
So pay attention to detail -
Be sure to exactly see what it is you are L00K-ing at
Understand that ALL CORPORATE names are always in ALL CAPS
Names of the living/loving Soul are in Mixed Case Letters
CORPORATIONS are neither Loving nor Loving - as CORPORATIONS are a DEAD
entity.
The word CORPORATION derives from the {Latin} CORPUS - meaning CORPSE / DEAD
Which is why the CORPSES in the Cemetery also have their name in ALL CAPS.
One would have to study Law for many years to learn that,
You are not taught this in CORPORATE GOVERNMENT indoctrination institutions
aka: school - just to keep you dumbed down.
As Pope Leo X stated _ "There are things not for the vulgar to know"
In other words - not for the common people / peasants to know
That is how such people / peasants are trapped in the Kings Court (Law Court)
Common people fall into the trap because they have been programmed to be
ZOMBIES - and not see - and be ignorant of the doctrines of the CORPORATE
GOVERNMENT Religion - These doctrines are known as Statutes - i.e
Man-Made Laws - That Man considers Superior to Gods Law -
That is where the Evil is - in Man's Law - in total opposition to Natural Law -
Steals all your inalienable rights you were born with and sells them back to you
under License as privileges.
Thank you.
Thanks for the video I've just purchased the D's 1102 ZE but can't find a lot of information on it ,would you know if the only difference is that mine is 100 MHz and yours is the 200mhz .thanks again...
Thanks much appreciated.
Im planning to get a scope..but im unsure if I should get 100mhz (DS1102Z-E) or 200mhz (this one). They are both identical except that spec. Price difference is 100 bucks. What are some examples of hobby work where 100mhz is not enough anymore? Im pretty sure 100mhz is more than enough for hobby/learning purposes..but i dont want to miss out and later have to buy another one.
It is tbh. Unless you have a specific use case you know needs 200mhz go 100mhz.
very good oscilloscope
What’s the resolution of the frequency counter ?
Will this do audio wave form for ham radio
There are people who do not speak English and read the translation, but can't they speak more slowly? Do you have to take the plane or train because it's late???
Buongiorno Rigol Digital - Oscilloscopio DS1102Z-E, 2 canali, 100 MHz, 1 GSa/s, 24 Mpts, 8 bit,
Questa sarebbe la versione du canali
cool !!!
Please could you show the difference between an inverted and uninverted Sbus/Fbus RX receiver signal in a video?
You didn't compare its FFT performance to a $650 AUD Tek's. Tek any day.
Dumb question: The 16MHz Arduino clock signal is a square wave. You measured a sine wave. Your scope is 200MHz, so we should have seen the square. Why didn't we?
Hmm.
Wanted to see what the scope can do and its performance. not how to operate a scope .
Imagine that Americans would use a non-metric system to refer electric data figures as they do with everything else…
Hablas extremadamente rápido y así no se puede
Io
Your audio is not good. Lot of time you voice is only spitting out air. Thang.....dool, tam.....bla bla.....you commentary is the worst. You could be a good writer but not a good commentator. you are not born for doing commentary. Listen to your own audio.
Thank you for the unhelpful feedback, while I always appreciate comments and feedback when its constructive, when its not then I dont. If you can do better please start a channel and post your own content so we can also give feedback.
@@MadRC well thats strange because I understood every word you spoke, or obviously I wouldn't have watched it.. nice vid thanks. you have my sub..
@Shaider Riz not sur what's your problem, maybe you need a doctor checking your ears? Or maybe learn more English? I heard every single word he said, the sound is very good.
@@MadRC Well done haha, the audio and the video is perfect. Another thing i appreciate of the English is the pronunciation, Americans are harder to understand. Greetings from Argentina.
By the way, i received mine 1202ze past saturday, i wonder if i can read spi with 2 channels.