New toy(?) scope Fnirsi DPOX180H, claimed 180MHz/500MSps (May 2023) - Page 1
Forum section: electronics / testgear

author: tunk
author_rank: Super Contributor
timestamp: May 18, 2023, 12:57:12 pm
content: 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 $140https://www.aliexpress.com/item/1005005564788266.htmlhttps://youtu.be/G5f4Rkf83H8

author: Aldo22
author_rank: Super Contributor
timestamp: May 18, 2023, 01:14:03 pm
content: 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):

author: coromonadalix
author_rank: Super Contributor
timestamp: May 18, 2023, 01:20:31 pm
content: interesting ....

author: RAPo
author_rank: Super Contributor
timestamp: May 18, 2023, 01:50:20 pm
content: Ordered one. Will arrive early June.

author: tunk
author_rank: Super Contributor
timestamp: May 18, 2023, 04:29:26 pm
content: A PCB screendump from the youtube video:- Allwinner F1C100s SoC- Anlogic EF2L45LG144B FPGA- two unidentified AD(?) convertersIIRC, quite similar to the 1013d and 1014d.Wonder if the real bandwidth is ~30MHz like the others, or if they havedone some new developments? At least they don't claim it's 1GSps.

author: Aldo22
author_rank: Super Contributor
timestamp: May 21, 2023, 02:46:24 pm
content: First impressions which do not come from the advertising department can be seen here.

author: RAPo
author_rank: Super Contributor
timestamp: May 21, 2023, 02:57:41 pm
content: Quote from: Aldo22 on May 21, 2023, 02:46:24 pmIs the "digital phosphor" a marketing gimmick?

author: Aldo22
author_rank: Super Contributor
timestamp: May 21, 2023, 03:26:48 pm
content: Quote from: RAPo on May 21, 2023, 02:57:41 pmYou can see different trace intensities.Looks pretty good anyway

author: RAPo
author_rank: Super Contributor
timestamp: May 21, 2023, 05:59:37 pm
content: Thanks. Could you verify if it is really a 180MHz?

author: Aldo22
author_rank: Super Contributor
timestamp: May 21, 2023, 06:29:14 pm
content: Quote from: RAPo on May 21, 2023, 05:59:37 pmNo, I just found the pictures on the web.I think you ordered one?

author: RAPo
author_rank: Super Contributor
timestamp: May 21, 2023, 06:46:33 pm
content: Yes, will arrive in early June, so in a few weeks I know more.

author: mwb1100
author_rank: Frequent Contributor
timestamp: May 22, 2023, 01:52:12 am
content: 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...)

author: tatel
author_rank: Frequent Contributor
timestamp: May 22, 2023, 02:46:13 am
content: https://www.eevblog.com/forum/testgear/fnirsi-1013d-100mhz-tablet-oscilloscope/msg4577548/#msg4577548

author: Aldo22
author_rank: Super Contributor
timestamp: May 22, 2023, 06:35:00 am
content: Quote from: mwb1100 on May 22, 2023, 01:52:12 amYes, 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.

author: 2N3055
author_rank: Super Contributor
timestamp: May 22, 2023, 07:44:22 am
content: Quote from: Aldo22 on May 22, 2023, 06:35:00 amIf signal generator shows 1.6V RMS that is 2.256 V P-P for sinewave. In which case Rigol is doing excellent job.

author: vk6zgo
author_rank: Super Contributor
timestamp: May 22, 2023, 07:57:30 am
content: $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."Tell 'em they're dreaming!"

author: Aldo22
author_rank: Super Contributor
timestamp: May 22, 2023, 09:18:11 am
content: Quote from: vk6zgo on May 22, 2023, 07:57:30 amThis is normal on Ali.Everything is at least 40% "cheaper" than the fantasy price, which no one ever pays.OnBanggoodit is a little different.

author: mwb1100
author_rank: Frequent Contributor
timestamp: May 22, 2023, 09:40:11 am
content: Quote from: 2N3055 on May 22, 2023, 07:44:22 amI 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).

author: RAPo
author_rank: Super Contributor
timestamp: May 27, 2023, 03:04:26 pm
content: 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 athttps://drive.google.com/file/d/14e3F9jxrBu7EsTDNAcI0UgPWvEX24nBy/view?usp=share_link.Mailed Fnirsi and asked for a firmware update regarding the cursors.

author: BillyO
author_rank: Super Contributor
timestamp: May 27, 2023, 03:18:10 pm
content: 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.

author: RAPo
author_rank: Super Contributor
timestamp: May 27, 2023, 03:41:20 pm
content: For the bandwidth I already had low hopes, but the cursor bug shouldn't be there.

author: Aldo22
author_rank: Super Contributor
timestamp: May 27, 2023, 04:06:17 pm
content: Quote from: RAPo on May 27, 2023, 03:41:20 pmAre you sure you measured it correctly and in the same way as the Rigol (dummy load, etc.)?I can hardly imagine it beingthatbad.Where would the -3dB limit be?

author: RAPo
author_rank: Super Contributor
timestamp: May 27, 2023, 04:17:11 pm
content: 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.

author: Aldo22
author_rank: Super Contributor
timestamp: May 27, 2023, 04:44:35 pm
content: Hi RAPoAnd what is the bandwidth according to your measurement?Just the point where Pk-Pk falls below -3 dB (0.707) compared to, say, 100kHz?

author: Escalator
author_rank: Newbie
timestamp: May 27, 2023, 08:40:53 pm
content: 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, Banggoodhttps://rb.gy/xpoitLikely so new that all stock, is still abroad in far-east