Author Topic: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)  (Read 88507 times)

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Online tunkTopic starter

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New toy(?) scope from Fnirsi, DPOX180H:
- claimed 180HMz (-3dB) and 500MSps
- two channels
- 5mV-10V/div, 5nS-50S
- 20MHz signal generator
- 2.8" screen
- (initial) price $140

https://www.aliexpress.com/item/1005005564788266.html
https://youtu.be/G5f4Rkf83H8
« Last Edit: May 18, 2023, 01:01:28 pm by tunk »
 
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Online Aldo22

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It certainly looks good.
I'm curious about the first tests, whether it works as well as it seems in the video.

EDIT: Here is one:



EDIT: Another one (RU):

« Last Edit: June 19, 2023, 09:17:07 am by Aldo22 »
 

Offline coromonadalix

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interesting  ....
 

Online RAPo

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Ordered one. Will arrive early June.
 

Online tunkTopic starter

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A PCB screendump from the youtube video:
- Allwinner F1C100s SoC
- Anlogic EF2L45LG144B FPGA
- two unidentified AD(?) converters
IIRC, quite similar to the 1013d and 1014d.
Wonder if the real bandwidth is ~30MHz like the others, or if they have
done some new developments? At least they don't claim it's 1GSps.
 
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Online Aldo22

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First impressions which do not come from the advertising department can be seen here.




 
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Online RAPo

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First impressions which do not come from the advertising department can be seen here.
Is the "digital phosphor" a marketing gimmick?
 

Online Aldo22

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Is the "digital phosphor" a marketing gimmick?
You can see different trace intensities.
Looks pretty good anyway
 

Online RAPo

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Thanks. Could you verify if it is really a 180MHz?
 

Online Aldo22

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Thanks. Could you verify if it is really a 180MHz?
No, I just found the pictures on the web.
I think you ordered one?
 

Online RAPo

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #10 on: May 21, 2023, 06:46:33 pm »
Yes, will arrive in early June, so in a few weeks I know more.
 
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Offline mwb1100

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #11 on: May 22, 2023, 01:52:12 am »
The photos show a disagreement in the voltage measurements.  A couple of them are by a factor of 10 so could be accounted for by the FNIRSI being mis-configured for 10x probes.

But the 50Mhz signal shows 20Vpp while the signal generator says it’s outputting 1.6V (unless I’m misunderstanding).  That can’t be accounted for by a mistaken 10x config? 

Is the FNIRSI already down 40% at 50Mhz?

(edit: fix some phone auto-correct typos - I should never post from a phone...)
« Last Edit: May 22, 2023, 06:24:58 am by mwb1100 »
 
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Online Aldo22

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #13 on: May 22, 2023, 06:35:00 am »
The photos show a disagreement in the voltage measurements.  A couple of them are by a gator of 10 so could be accounted for by the FNIRSI being mis-configured for 10x probes.

But the 50Mhz signal shows 20Vpp while the digger says it’s outputting 1.6V (unless I’m misunderstanding).  That can’t be accounted for by a mistaken 10x config?

Is the FNIRSI already down 40% at 50Mhz?

Yes, i think it is set to x10 and should be x1, but I assume it is the same setting for all 3 images.
FNIRSI always shows 20.x VPP and RIGOL shows 2.2x VPP.
It does not show exactly the same as the RIGOL, but amplitude-wise there ist nothing special at 50MHz imo.
I don't know why the signal generator shows 1.6 VPP and how that is plugged together.
« Last Edit: May 22, 2023, 08:42:06 am by Aldo22 »
 

Online 2N3055

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #14 on: May 22, 2023, 07:44:22 am »
The photos show a disagreement in the voltage measurements.  A couple of them are by a gator of 10 so could be accounted for by the FNIRSI being mis-configured for 10x probes.

But the 50Mhz signal shows 20Vpp while the digger says it’s outputting 1.6V (unless I’m misunderstanding).  That can’t be accounted for by a mistaken 10x config?

Is the FNIRSI already down 40% at 50Mhz?

Yes, i think it is set to x10 and should be x1, but I assume it is the same setting for all 3 images.
FNIRSI always shows 20.x VPP and RIGOL shows 2.2x VPP.
It does not show exactly the same as the RIGOL, but there ist nothing special at 50MHz imo.
I don't know why the signal generator shows 1.6 VPP and how that is plugged together.

If signal generator shows 1.6V RMS that is 2.256 V P-P for sinewave. In which case Rigol is doing excellent job.
 
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Offline vk6zgo

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #15 on: May 22, 2023, 07:57:30 am »
$140 converts to $A211, which is starting to stretch the budget a bit for something from FNIRSI.
The Ali express link is a tad higher at $A219.82, followed by a note that it was 40% off from $A 366.36. ::)
 
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Online Aldo22

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #16 on: May 22, 2023, 09:18:11 am »
The Ali express link is a tad higher at $A219.82, followed by a note that it was 40% off from $A 366.36. ::)
This is normal on Ali.
Everything is at least 40% "cheaper" than the fantasy price, which no one ever pays.

On Banggood it is a little different.
« Last Edit: May 24, 2023, 08:19:40 am by Aldo22 »
 

Offline mwb1100

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #17 on: May 22, 2023, 09:40:11 am »
If signal generator shows 1.6V RMS that is 2.256 V P-P for sinewave. In which case Rigol is doing excellent job.

I believe the JDS6600 signal generator only shows Vpp (I don't have one so I'm not certain, but the reviews I have seen only ever talk about setting it to Vpp).
 
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Online RAPo

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #18 on: May 27, 2023, 03:04:26 pm »
The scope has arrived early!.
I like the UI, the buttons are a bit stiff, but that will improve over time (I hope).

And the first signal I inputted shows a problem:
Input 80MHz sine at 2Vpp gives 80MHz, 608mVpp on the Fnirsi.
Also discovered a bug: I set cursors at -2V and 2V, but the location values shown in the window are 808mV and 4.04V.
See full resolution at https://drive.google.com/file/d/14e3F9jxrBu7EsTDNAcI0UgPWvEX24nBy/view?usp=share_link .

Mailed Fnirsi and asked for a firmware update regarding the cursors.
 
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Offline BillyO

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #19 on: May 27, 2023, 03:18:10 pm »
It's a FNIRSI.  They outright lie about their specifications.  If they say it's 180MHz, expect about 60MHz at which point it will begin to loose it's tiny mind.
Bill  (Currently a Siglent fanboy)
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Want to see an old guy fumble around re-learning a career left 40 years ago?  Well, look no further .. https://www.youtube.com/@uni-byte
 

Online RAPo

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #20 on: May 27, 2023, 03:41:20 pm »
For the bandwidth I already had low hopes, but the cursor bug shouldn't be there.
 

Online Aldo22

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #21 on: May 27, 2023, 04:06:17 pm »
For the bandwidth I already had low hopes
Are you sure you measured it correctly and in the same way as the Rigol (dummy load, etc.)?
I can hardly imagine it being that bad.
Where would the -3dB limit be?
 

Online RAPo

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #22 on: May 27, 2023, 04:17:11 pm »
The photo I linked to shows the test settings. There is a 50ohm termination and rigol and fnirsi get the same signal via a T-bnc.
 

Online Aldo22

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #23 on: May 27, 2023, 04:44:35 pm »
Hi RAPo

And what is the bandwidth according to your measurement?
Just the point where Pk-Pk falls below -3 dB (0.707) compared to, say, 100kHz?
 

Offline Escalator

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Re: New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023)
« Reply #24 on: May 27, 2023, 08:40:53 pm »
The promo video looks promising, and even at just 60MHz would be decent in this form factor.   :-//
What's the lowest price here in late May 2023.?
Are there any coupons that can get it lower than 135.99 USD.??
Coupons from China, Banggood  https://rb.gy/xpoit
Likely so new that all stock, is still abroad in far-east
 


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