Author Topic: Should I buy a Rigol MSO5000?  (Read 12656 times)

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Offline dietert1

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Re: Should I buy a Rigol MSO5000?
« Reply #150 on: April 10, 2019, 07:21:23 pm »
Yes, certainly a huge system like this forum needs sponsors. And like the first two pages at Google are advertising, here we see many threads about buying Rigol or Siglent. So let's not mention LeCroy anymore in a thread about buying Rigol scopes.

Are you using any of your scopes with active probes?

Regards, Dieter
 

Offline rsjsouza

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Re: Should I buy a Rigol MSO5000?
« Reply #151 on: April 10, 2019, 08:09:24 pm »
Dieter, excellent data captures.

He almost made me get a Waverunner LT LeCroy as well back in 2015... :)
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline tautech

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Re: Should I buy a Rigol MSO5000?
« Reply #152 on: April 10, 2019, 08:48:44 pm »
For those who don't know LeCroy i prepared an example measurement from a USB2 audio transmission. Then two zooms into two packets. Then two gated frequency measurements in the sync fields of the two packets (0101.. sequence gives 240 MHz). One measurement was taken with the 9354A i mentioned before.
The other one is with an 11 year old WR 64Xi which currently sells at a similar price as the 350 MHz version of the Rigol 5000.
Maybe someone can try to do it with a Rigol 5000.

Regards, Dieter

Be careful, the last guy who talked a lot about Lecroy has been banned    :scared:
Yes, just because he spoke his mind based on extensive experience and some members did not like that.  ::)

W went to the all about circuits forum and still today that was a loss for EEVblog..........but even Dave could not see the value of contributions made vs the protests from members.
Avid Rabid Hobbyist
 
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Offline Fungus

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Re: Should I buy a Rigol MSO5000?
« Reply #153 on: April 11, 2019, 09:21:20 am »
It is also funny how Rigols and Siglents are held up to a higher standards than A-brand scopes costing 20x more.

It's mostly Rigols being held to different standards by the Siglent dealers here.

 

Offline petemate

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Re: Should I buy a Rigol MSO5000?
« Reply #154 on: April 11, 2019, 06:34:49 pm »
W went to the all about circuits forum and still today that was a loss for EEVblog..........but even Dave could not see the value of contributions made vs the protests from members.

Is there a juicy story hiding here? ;)
 

Offline tautech

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Re: Should I buy a Rigol MSO5000?
« Reply #155 on: April 11, 2019, 07:55:05 pm »
W went to the all about circuits forum and still today that was a loss for EEVblog..........but even Dave could not see the value of contributions made vs the protests from members.

Is there a juicy story hiding here? ;)
Not really, just Wuerstchenhund is involved in profession equipment supply so has extensive experience and knowledge that he also shared here and with some passion and forthrightness.
Unfortunately as he was banned the Members search won't find his profile to look through his posts but the main content Search will to find some of his contributions.
There's a few members that still have contact with him like I do.  :)
Avid Rabid Hobbyist
 
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Online maginnovision

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Re: Should I buy a Rigol MSO5000?
« Reply #156 on: April 11, 2019, 08:02:01 pm »
Yeah, some of the professional equipment suppliers here are over zealous. Passion is best in moderation.
 

Offline dietert1

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Re: Should I buy a Rigol MSO5000?
« Reply #157 on: April 12, 2019, 08:40:48 am »
We may loose a lot when marketing needs hinder free speech. What remains is "alternative truth" and airplanes start falling down in plain sunshine, just one example. I don't know how to expect anything smart from an environment like China.

Regards, Dieter
 

Online 2N3055

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Re: Should I buy a Rigol MSO5000?
« Reply #158 on: April 12, 2019, 09:14:37 am »
We may loose a lot when marketing needs hinder free speech. What remains is "alternative truth" and airplanes start falling down in plain sunshine, just one example. I don't know how to expect anything smart from an environment like China.

Regards, Dieter

Let me see if I understood correctly:
because Chinese are stupid, American companies are cheating and don't know or don't care how to  make good products so their airplanes are falling out of the sky and people are dying....
Is that what you saying ?
 :palm:
 

Offline timber23

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Re: Should I buy a Rigol MSO5000?
« Reply #159 on: May 16, 2019, 01:19:47 pm »
For those who don't know LeCroy i prepared an example measurement from a USB2 audio transmission. Then two zooms into two packets. Then two gated frequency measurements in the sync fields of the two packets (0101.. sequence gives 240 MHz). One measurement was taken with the 9354A i mentioned before.
The other one is with an 11 year old WR 64Xi which currently sells at a similar price as the 350 MHz version of the Rigol 5000.
Maybe someone can try to do it with a Rigol 5000.

Regards, Dieter
Hello Dieter,

I tryed to repeat your measurement, but my USB audio device seems to communicate much solwer:


For testing, I bought a cheap USB Audio adapter of eBay. The ID of the device is 8086:0808
I am using differential probes (Micsig) on D+ and D- at the USB connector.

Best regards
Andreas
 

Offline dietert1

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Re: Should I buy a Rigol MSO5000?
« Reply #160 on: May 16, 2019, 02:16:51 pm »
Great, that appears to be 12 MBits/second (2x 6,06 MHz) in comparison to the 480 MBits/second in the measurement i made on a CM6631A audio interface. You used cursors to determine the bit rate using two bit intervals, while i set a measurement gate to let the scope determine the frequency within that gate. And i could extract two different zooms, each one with its own gate and measurement.
It appears those scopes serve to derive the bit rates and the Rigol is good for full speed USB, while the Lecroy WR64Xi does USB2. This example is a bit silly anyway, since none of both scopes decodes the data. Don't know whether Lecroy offered this for the WR64Xi. We have a Lecroy SDA 6020 6 GHz scope that does it and puts the results into a table.

Risetime in your Rigol measurement seems to be about 80 nsec. Is this real or is that a bandwidth limit of the scope or the differential probe you are using? What is the input capacitance of that probe?

Regards, Dieter

PS: I guess it is real, because the differential logic amplitude is about 6 or 7 V, so it's an unterminated transmission line with the risetime determined by cable capacitance.
« Last Edit: May 16, 2019, 02:23:28 pm by dietert1 »
 

Offline timber23

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Re: Should I buy a Rigol MSO5000?
« Reply #161 on: May 16, 2019, 03:08:54 pm »
The differential probe DP10013 has a rise time of 3.5ns and an impedance of 10M ohm/ 1pf.

The scopes rise/fall time is 750ps.

Following your argumentation, the cable is the reason for the slow slopes.

Best regards
Andreas

Gesendet von meinem MI 9 mit Tapatalk

 


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