EEVblog #1260 - $70 100MHz Oscilloscope?

[cliffyk]

RE: FNIRSI's "proof" video (I was bored and watched the BS again)--it also strikes me that a "HANMATEK" DSO1102 could also be a less than precision instrument--just sayin', ya' know...

But that aside, their driving both 'scopes to 25 Mhz, connected in parallel via alligator clip terminated "test" leads, invalidates in numerous ways, the entire supposed "comparison". It would be interesting (but hardly worth it) to send the blasted thing off to Trescal or some other lab and have it tested. Maybe they'd volunteer to do it as a lark...

[x86guru]

RE: FNIRSI's "proof" video (I was bored and watched the BS again)--it also strikes me that a "HANMATEK" DSO1102 could also be a less than precision instrument--just sayin', ya' know...

But that aside, their driving both 'scopes to 25 Mhz, connected in parallel via alligator clip terminated "test" leads, invalidates in numerous ways, the entire supposed "comparison". It would be interesting (but hardly worth it) to send the blasted thing off to Trescal or some other lab and have it tested. Maybe they'd volunteer to do it as a lark...

Note, it's a HANMATEK DOS1102, not to be confused with a DSO1102. 

Here is a link to it:

https://www.aliexpress.com/item/4000768225718.html?spm=a2g0o.productlist.0.0.71fe5c67p0Weoa

Notice it's good for measuring "Heart". I guess it renders a picture of a heart instead of a single EKG type waveform. "Rhom bus", yup. Band limited? Inescapable...

[cliffyk]

;I stand corrected--i actually knew that as I looked the instrument up on Amazon but for a geezer like me DOS and DSO are two entirely different things and my "semi-conscientious" took over--thanks for the correction!

[x86guru]

FNIRSI was not happy that I used my Siglent 200MHz scope to show how bad the FNIRSI-5012H was at measuring a 5Vpp 25MHz signal. They requested that I use a 100MHz oscilloscope for a "fair comparison", so I used my Rigol 100MHz scope and uploaded a video showing my Rigol 100MHz scope also measures 5.0Vpp for a 25MHz 5.0Vpp. Now they are whining about the price of the equipment I used. I can't believe FNIRSI is an actual company

[cliffyk]

So far this "back-and-forth" appears focused on rebutting your analysis of the toy's 25 Mhz performance. Have they ever addressed their 100 Mhz bandwidth claim directly?

[cliffyk]

Saw this on Amazon, another contender for the coveted "Cheap, Not Really 100 Mhz 'scope of the Year" award--$109.99...



It a nice looking little thing but I recently bought a used Hantek DSO1062B, honest-to-God 60 Mhz "handheld" (if you have BIG hands) and already have drawer full of these cheap toy 'scopes.:

[x86guru]

So far this "back-and-forth" appears focused on rebutting your analysis of the toy's 25 Mhz performance. Have they ever addressed their 100 Mhz bandwidth claim directly?

You nailed it, FNIRSI is a toy company. FNIRSI just says it has 100 MHz bandwidth without providing any proof. FNIRSI did state that frequency measurement ability equates to bandwidth ability. FNIRSI has consistently demonstrated gross incompetence.

[Fungus]

FNIRSI has consistently demonstrated gross incompetence.

I have no idea why you keep repeating that they're incompetent or don't know what they're doing.

Look at the device in front of you, could you make one? I couldn't.

Most likely the boss told them to make a 100Mhz device with 1GSamples/sec. because those were some numbers he saw in a brochure. Oh, and it had to cost $100. 

The engineers did what they could and the rest is damage control.

You have to admit they look nice (Apple used them in a corporate video!) and they basically work.

[x86guru]

I have no idea why you keep repeating that they're incompetent or don't know what they're doing.

Agreed, it's obvious they are incompetent.

Look at the device in front of you, could you make one? I couldn't.

Yes, it's a very trivial design.

Most likely the boss told them to make a 100Mhz device with 1GSamples/sec. because those were some numbers he saw in a brochure. Oh, and it had to cost $100. 

The engineers did what they could and the rest is damage control.

You have to admit they look nice (Apple used them in a corporate video!) and they basically work.

A.K.A a toy, not to be confused with an oscilloscope.

[Fungus]

Look at the device in front of you, could you make one? I couldn't.

Yes, it's a very trivial design.

A manufactured product at the FNIRSI price point? Maybe you should call Rigol/Siglent and let them know how it's done.

[cliffyk]

FNIRSI has consistently demonstrated gross incompetence.

I have no idea why you keep repeating that they're incompetent or don't know what they're doing.

Look at the device in front of you, could you make one? I couldn't.

Most likely the boss told them to make a 100Mhz device with 1GSamples/sec. because those were some numbers he saw in a brochure. Oh, and it had to cost $100.  :

The engineers did what they could and the rest is damage control.

All irrelevant points. No one here thrust their claims upon them; they are the ones that made the fanciful and bold (I am being generous) proclamations about THEIR product.

Roger Ebert never made a movie, but was a well respected critic of same.

Joe Biden has no prior executive management experience (never mind, bad analogy I did not mean to prove your point)...

You have to admit they look nice (Apple used them in a corporate video!) and they basically work.

This speaks more to Apple's ad agency's incompetence than anything else--in the little bit of the Apple blurb I watched the "lab" shots looked like some copywriter and their crew staged it with equipment pulled out of a closet--I wonder if those guys were actually engineers? They read their lines too well...

[x86guru]

A manufactured product at the FNIRSI price point? Maybe you should call Rigol/Siglent and let them know how it's done.

Rigol/Siglent don't make toys that I'm aware of, but Fisher-Price® might be interested.

[cliffyk]

Generation gap on display there--was I to select two shining examples of lab instrumentation they would be Tektronix and Hewlett-Packard (Agilent)--IIRC Rigol used to make some near toy like crap too, maybe FNRSI will someday get better also...

[ataradov]

Generation gap shows, but in a different way - younger people can work with whatever tools they are given and/or can afford. Old people whine if they don't get a Tek.

[cliffyk]

Whipper-snapper...

I worked 50+ years as a professional engineer, and still do my share through SCORE. I.e. I have likely adapted, modified and cajoled materials and machines longer that you have been alive!

"Engineering is the art of making what you want from what you have or can get."
-me-

[BD1QMP]

thank you for your continue updating! It is really helpful.  The guys from that company didn't know what is bandwidth! It is a joke that use frequency to prove the analog bandwidth. After the discussion, a china small scope company change their bandwidth  claim from 100MHz to 50MHz with comments (3db).

[David Hess]

Generation gap shows, but in a different way - younger people can work with whatever tools they are given and/or can afford. Old people whine if they don't get a Tek.

I would have said the opposite.  Old people were less likely to have access to test instruments like network analyzers, so had to get used to designing a circuit and doing the calculations on paper.