Author Topic: FNIRSI-1013D "100MHz" tablet oscilloscope (Read 416685 times)

csuhi17 · « **Reply #2200 on:** April 14, 2024, 12:30:29 pm »

I don't know, after I installed it, I did the calibration afterwards, I didn't measure it before. After installation, it asks for calibration

.
A couple of batteries connected in series and a high-value potentiometer with which you can divide the voltage. You also need a multimeter to adjust the voltage.

Ruskie · « **Reply #2201 on:** April 14, 2024, 12:35:00 pm »

Quote from: csuhi17 on April 14, 2024, 12:30:29 pm

I don't know, after I installed it, I did the calibration afterwards, I didn't measure it before. After installation, it asks for calibration
.
A couple of batteries connected in series and a high-value potentiometer with which you can divide the voltage. You also need a multimeter to adjust the voltage.

Ha! Right... I could connect two 9V batteries, a potentiometer and a voltmeter, right. Might try to setup this rig, thanks

Ruskie · « **Reply #2202 on:** April 14, 2024, 01:18:22 pm »

Quote from: csuhi17 on April 14, 2024, 12:30:29 pm

I don't know, after I installed it, I did the calibration afterwards, I didn't measure it before. After installation, it asks for calibration
.
A couple of batteries connected in series and a high-value potentiometer with which you can divide the voltage. You also need a multimeter to adjust the voltage.

Something like this, plugging the probe in g5 and its ground in g6 would work?

csuhi17 · « **Reply #2203 on:** April 14, 2024, 01:49:13 pm »

Set the potentiometer to the middle position before connecting to ~~avoid short-circuiting the battery~~.The input of the scope is 1MOhm, how could it be short-circuited?

im sleepy.

The potentiometer should be of the order of kOhm minimum, DO NOT load the batteries with a small resistance, and DO NOT short-circuit them through the potentiometer!
In the video you can see that the two channels CH1 and CH2 must be calibrated at the same time.
You have to set the measuring probes to 1x position, if I remember correctly.

Lelick · « **Reply #2204 on:** April 17, 2024, 06:03:28 am »

Hello 🤗
I bought this oscilloscope.
When calibrating the oscilloscope probes, the meander of the first channel differed from the second channel. The meander of the first channel was bad. I opened the oscilloscope and removed the protective shield of the first and second channels. I discovered a defect in the soldering... Instead of one capacitor, the machine installed two capacitors on top of each other. (Fixed)

Please forgive me, I am writing through a translator.

Question for Atlan:
Can I build your project on Windows? I'm not a programmer, of course, but I want to experiment! Thanks!

Atlan · « **Reply #2205 on:** April 17, 2024, 06:37:51 am »

If you manage to configure the netbean environment in windows, also the C translator.

I didn't succeed even under Linux.

A new version may be released tomorrow, with the option of choosing an automatic setting version

Lelick · « **Reply #2206 on:** April 17, 2024, 08:55:03 am »

Are you talking about this?
https://github.com/tsnsoft/NetBeansForCPP

NetBeans?

Atlan · « **Reply #2207 on:** April 17, 2024, 12:55:13 pm »

Yes, netbeans v19 or v20?

Lelick · « **Reply #2208 on:** April 17, 2024, 04:45:43 pm »

the last v21

Anty_94 · « **Reply #2209 on:** April 20, 2024, 05:52:10 am »

Hello, please tell me why the cursor is not parallel to zero (to the yellow bar), tell me how to fix it?

pcprogrammer · « **Reply #2210 on:** April 20, 2024, 07:33:22 am »

The cursor is the 0V level indicator and since you are measuring ~14.6V it should give you slightly less then 3 divisions from the cursor to the trace on 5V/div setting. Can't see where the point of the cursor sits due to the measurement display, but it might be a bit to low, giving you a trace reading of ~15V.

Your calibration values look in range of what they should be, only the channel 1 DC offset might be a bit high, but this is something for Atlan to answer.

Atlan · « **Reply #2211 on:** April 20, 2024, 06:13:48 pm »

The maximum value for dc shift is 400.

Atlan · « **Reply #2212 on:** April 20, 2024, 08:29:05 pm »

Added button for choosing old or new autosetup. firmware v0.024v

albano-1967 · « **Reply #2213 on:** April 20, 2024, 08:45:22 pm »

Quote from: Atlan on April 20, 2024, 08:29:05 pm

Added button for choosing old or new autosetup. firmware v0.024v

Thank you very much for your work. Please remind us how the autosetup methods differ?

Atlan · « **Reply #2214 on:** April 20, 2024, 09:05:08 pm »

Try it and see. The old version first detects the frequency and increases the sensitivity. The new version first adjusts the sensitivity and then detects the frequency.

xlzslayer · « **Reply #2215 on:** April 21, 2024, 12:55:22 am »

Hello,

Just wondering about the current state of the custom firmware, is it suitable for daily usage?

Thanks

Atlan · « **Reply #2216 on:** April 21, 2024, 06:00:24 am »

In theory, yes. I do not use the original firmware.

engineer.r152 · « **Reply #2217 on:** April 21, 2024, 12:04:20 pm »

In what situations does it make sense to use the old version of autoset, or is this feature added just for the difference?

Atlan · « **Reply #2218 on:** April 21, 2024, 02:02:07 pm »

No one has yet said which one is better, but the old version works worse at high frequencies and small signals. Now you can simply try out which one is better or which suits you better. With normal signals, the old one is fine. It was discussed here a couple of pages ago.

Atlan · « **Reply #2219 on:** **Yesterday** at 05:51:20 pm »

Quote from: gadak on April 03, 2024, 06:43:25 pm

"Set 7.5V on both channels, (On the measured CH1 and CH2 values Vpp, Vmax Vmin Vavg) connect DC voltage, press autoset (OLD version). Check the AVG value and write it here. Open the channel menu, highlight AC and then back to DC (don't leave the channel menu). Exit the channel menu, and check the AVG value again. Make video."

https://youtu.be/Hx_uuO6MV24 missing 2 channel and vpp measured

I need a sample from at least 3 users. well thank you

engineer.r152 · « **Reply #2220 on:** **Yesterday** at 07:50:43 pm »

I have the same behavior on two oscilloscopes. I have already sent the video above.

Atlan · « **Reply #2221 on:** **Today** at 04:36:29 am »

Set 7.5V on both channels, (On the measured CH1 and CH2 values Vpp, Vmax Vmin Vavg) connect DC voltage, press autoset (OLD version). Check the AVG value and write it here. Open the channel menu, highlight AC and then back to DC (don't leave the channel menu). Exit the channel menu, and check the AVG value again. Make video.

But it does not meet the conditions, written above.

tokar · « **Reply #2222 on:** **Today** at 11:53:32 am »

Device power: DC-DC up - MT3608(SX1308)
Clock (time) DS3231
Voltage source 7.5V - battery + op-amp with input divider (repeater mode).
v0024v. Old autosetup.
DCin 7.5v > autosetup > Vavg - CH1=7.3v CH2=7.3v
DCin 7.5v > set CH1,CH2 DC-AC-DC
Vavg - CH1=7.5v CH2=7.55v

https://youtu.be/1c82FYRV91I

csuhi17 · « **Reply #2223 on:** **Today** at 06:11:40 pm »

V0.024V
The device is in original condition, with a charged battery, old edition.
Power source Fnirsi SG-004A, monitored with an Owon multimeter. 7.5V
1x , 2.5V/div. 5Msa/s 20us/div.

old
CH1
Avg=7.20V Vmin=7.05V Vmax=7.40V Vpp= 350mV
Auto
Avg=7.40V Vmin=7.30V Vmax=7.65V Vpp= 350mV

CH2
Avg=7.30V Vmin=7.30V Vmax=7.50V Vpp= 150mV
Auto
Avg=7.50V Vmin=7.40V Vmax=7.65V Vpp= 250mV

new
CH1
Avg=7.05V Vmin=6.75V Vmax=7.05V Vpp= 250mV
Auto
Avg=6.95V Vmin=6.85V Vmax=7.10V Vpp= 250mV

CH2
Avg=7.30V Vmin=7.20V Vmax=7.65V Vpp= 400mV
Auto
Avg=7.50V Vmin=7.40V Vmax=7.85V Vpp= 400mV

Before measuring, I fully charged it and went through the entire calibration.


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Author Topic: FNIRSI-1013D "100MHz" tablet oscilloscope (Read 416685 times)

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