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New bench scope - Fnirsi 1014D, 7", 1GSa/s

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pcprogrammer:
It was a bit of a search and gathering of resources but I now have a .svd file for the GD32E230. The addon package for the GD32E230 from the GigaDevice site https://www.gd32mcu.com/en/download/0?kw=GD32E2 has a .svd file but it misses a lot of the core peripherals like the systick timer and Ghidra stumbled on an overlap between the SYSCFG and CMP peripherals.

Used data from the ATSAML11E16A.svd file I found on the net to complement the core peripherals. Not sure if it is all correct but it is also a Cortex-M23 device. Could not find documentation on the GD32E230 that has info about the core peripherals. Just the peripherals added by GigaDevice like USART, ADC, etc.

Now the de-compiled code in Ghidra shows the name of the peripherals and the registers being used. A very nice feature I must say. Wish I knew about that when I started the reverse engineering of the 1013D :(

All the ARM instructions used are thumb or thumb-2 since the Cortex-M23 does not support the full ARM instruction set. Jump addresses have the lowest bit set because of this.

Attached both files but had to add the .txt extension to upload them.

mkstevo:

--- Quote from: tautech on January 26, 2022, 07:47:14 pm ---
--- Quote from: mkstevo on January 26, 2022, 07:25:12 pm ---
I don't seek to claim that Hameg should be worried by FNIRSI, the two are polar opposites, but for the life of me I can't understand the snobbery towards FNIRSI.


--- End quote ---
Despite your experience you have overlooked the most basic of scope requirements, input sensitivity and input ratings !

With a max sensitivity of only 50mV/div and 40V max at 1x input attenuation severely limits this scope for even basic use. Only by adding a 10x probe is the input rating increased to 400V, a rating that is standard at 1x for most other DSO's available however with a 10x probe max sensitivity becomes 500mV/div !

Snobbery, be buggered, practical usefulness is what really matters.

--- End quote ---

I'm not sure I did overlook that. I've never once needed to measure 0.0x Volts. The aircraft monitoring systems we used to manufacture used a pressure transducer that gave an output of nominally 30mV before amplification, that would certainly be visible when checking that a valid signal was being presented to the amplifier. In the industry I now work in everything has 5V, 3.3V or 1.8V logic. Would 50mV be enough to display that? Yes. At home where I use my FNIRSI, it is mainly used for tracing faults in valve (tube) audio and transistorised audio, vintage video equipment repairs and my personal designs for electronic clocks. All with voltages well above 50mV.

Is it not possible to accept that for some people, the FNIRSI is all that they might need? I accept not for people who need that bit more in the way of performance and have the budget to pay for that performance, but for a hobbyist, with limited requirements and limited funds the FNIRSI is a value alternative and eminently practical and useful.

tunk:
Review by Kerry Wong, summed up as "oh man, this is bad":

tunk:

--- Quote from: mkstevo on June 04, 2022, 03:18:31 pm ---Is it not possible to accept that for some people, the FNIRSI is all that they might need?

--- End quote ---
All tools have their uses, and if you know their limitations they may be good tools.
But I'm not sure if your 30mV transducer is a good example. The 50mV/div setting is
in software only, in hardware it's 100mV/div. The +/-5% accuracy and 1V full scale
gives 50mV inaccuracy, so your 30mV may drown in noise and inaccuracy.

pcprogrammer:
Apparently not a lot of people find the postings about test equipment on EEVblog :-// There is a lot of comments on the video stating how glad people are he did the review and that it is not a positive one.

All that is shown in the video was already known way back from the work done on the 1013D and the 1014D. :-DD

Around 8:50 in the video he even does not notice the sudden rise in amplitude when the signal goes from ~41MHz to ~42MHz, which is when the software starts to calculate the sine wave instead of using the actual points, just as it does in the 1013D.

Around 15:09 he assumes the firmware to live on the SD card, which we all know is not the case. He should have consulted this thread before doing his review. Have noticed this missing with other reviewers too. A bit of a shame because this blog is full with useful information.

It seems he has a later unit fitted with the F1C200s instead of the F1C100s, which we also already knew from joseph4511 his posts.

All in all "mosterd na de maaltijd" like the Dutch would say. (Literally translated "mustard after the meal" and meaning "too little too late")

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