Hantek - Tekway - DSO hack - get 200MHz bw for free

[carloscuev]

Force trigger is useful when you've set the triggering to normal, which makes the scope wait for a trigger before acquiring the signal. By pressing force trigger, you can see the signal (eg. why is it not triggering) without changing triggering settings.

Oh nice ! Thanks ! I've tested it and you're right.

the yellow bar ist standard in the firmware, it pops-up when you push AutoSet button AND when the signal has been identified as square/sinus.

I've never used autoset in fact I do not like it very much because the wearing out of the relays, it would be very very nice to pop-up this nice yellow bar anytime, and better to choose what measurements to display ! hehe utopic dreams huh?

[wjb444]

DST1062B Symptom and Analysis

One day suddenly found that the oscilloscope waveform wrong, ripple greatly increased, and the measurements have more ripple, carefully test it, have a direct relationship with the human touch, human contact, the ripple will be more

Which should show a smooth sine wave, the result is superimposed on a large number of ripple ..
 

Then, I received a probe test signal port on the machine


 

Fortunately, in addition to larger ripple

But when I put fingers touched the machine test signal output port,
 

Same as the avalanche signal.

I think that the oscilloscope is broken, the door manufacturer sales, said ground not connected or not connected the probe ground, but I have ruled out two and I tried to use isolation transformers, no effect.

Intended to repair a few days, then normal the next day.

I believe the problem is not solved, not attack it is only temporary, and sure enough, today appeared the same problem, but there is no home digital television signals (add, digital television signals are often not on the door that my family and household, upstairs downstairs has a signal), I doubt there is ground, I measured a little electricity, the results have found that
 

Ground there is always the case with the zero line between the 26V AC, I remember that usually only a few tenths V voltage, which shows ground poorly grounded,
I do not know someone to steal power or bad, because most of the time is good and I will continue to monitor this phenomenon, because the family of digital television has been bad repair.

[rf-freak]

At which horizontal frequency did you saw this effect?
Please upload a picture having a better resolution
to let me see all details.

Regards
Peter

[wjb444]

There voltage AC ground

[walt]

There voltage AC ground

Try this. Hantekway uses common use HighVoltage capacitor (2kV), but its not rial Y-capacitor, which with certification behavior (low leakage and with overvoltage failure mode is break, not shorted, like common use ).

epcos emi capacitor

Good y-cap should be covered with icons, certificates for which it was tested

 

[Igor]

Try this. Hantekway uses common use HighVoltage capacitor (2kV), but its not rial Y-capacitor, which with certification behavior (low leakage and with overvoltage failure mode is break, not shorted, like common use ).

https://www.eevblog.com/forum/index.php?action=dlattach;topic=1571.0;attach=16386;image
I am so glad that my photo to someone needed! 

[tinhead]

Try this. Hantekway uses common use HighVoltage capacitor (2kV), but its not rial Y-capacitor, which with certification behavior (low leakage and with overvoltage failure mode is break, not shorted, like common use ).

Good y-cap should be covered with icons, certificates for which it was tested

this depends on where you bought your Tekway / Hantek,  DSO produced for domestic market (and when you look on ebay
99.99% of all shops are selling ONLY such DSOs) are in principle not complaint with EU/NA safety requirements.

In DSOs produced for international market you will find proper Y caps, see attached picture.

[walt]

I am so glad that my photo to someone needed! 

 

In DSOs produced for international market you will find proper Y caps, see attached picture.

Nice macro ! 
 But, I got pure china_borned_unit.

[tinhead]

as some ppl asked for, here the latest firmware (110923.1) for

Tekway DST1xxxB

http://hotfile.com/dl/133482275/8da8e64/dst1kb_2.06.3_01202b_fe(110923.1).up.html

and Hantek DSO5xxxB

http://hotfile.com/dl/133482188/6a15853/dst1kb_2.06.3_15202b_fact(110923.1).up.html

(please ensure you download the proper version)

files deleted - new version available

[carloscuev]

as some ppl asked for, here the latest firmware (110923.1)...

Thank you very much !
I've just updated and yes, contrast bug is fixed !

Do you have the changelog for this version?

[wjb444]

Thank you! Will try to tear down safety capacitor, and the results fed up.
Thanks again for enthusiastic people,
I will not forgive the English

[Kampfwurst]

I tried the Hantek DSO5xxxB 110923 Firmware. Without success. It says that a illegal Firmware detectet.

What is wrong?

[clonecrp]

Thanks Tinhead ! 

Kampfwurst - is dst1kb_2.06.3_15202b_fact(110923.1).up the first entry on your thumb drive (@ drive root)?

Cheers !

Doug

[Kampfwurst]

yes

I used the same USB Stick than before.

[Crenwick]

Is your DSO a 5202 or an upgraded to 5202 ?

Because this I think that this FW is only valid for the 5202 and not the other two models.

If flashed on my upgraded 5201 without any problem.

Have a nice day

[Kampfwurst]

i have the DSO5102B

[tinhead]

i have the DSO5102B

which is the reason why the update fail, once again:
- always use firmware only for your model (speed, manufacturer)
- always use empty tumb drive
- sometimes (depends on tumb drive) you need to remove ( ) in file name


here the DSO5102B

http://hotfile.com/dl/133877850/2a96996/dst1kb_2.06.3_15102b_fact(110923.1).up.html

and DSO5062B firmwares

http://hotfile.com/dl/133761713/8d06e78/dst1kb_2.06.3_15062b_fact(110923.1).up.html
files deleted - new version available

[wjb444]

I removed two X capacitors, and replaced the Y 2KV capacitor high-voltage capacitors, but the results did not improve.
As the frequency or voltage is not normal, to line voltage of about 30V.

[wjb444]

I am surprised is that I use 220V isolation transformer, isolation of the grid, but the phenomenon remains

[tinhead]

I am surprised is that I use 220V isolation transformer, isolation of the grid, but the phenomenon remains

just a stupid question, did you tested the 1khz signal on a different scope?

I see that both probes and both channels are affected, so it can't be the channel front end, it must be
something common for both (like power supply). I would measure (with different DSO) all the power signals,
it can be dying (self oscilating) cap/LDO or one of the bigger caps on PSU unit or rectifier diode (or the RC combination par.
to rectifier diode).

[walt]

As the frequency or voltage is not normal, to line voltage of about 30V.

I understand, the problem manifests itself when touching metal parts of the hand of an oscilloscope?

If so, then through the body and the oscilloscope runs a significant current, leading to noise in the scheme.
Do you have a real three-wire electrical network, with the present grounding?
Current can flow through the other units connected to the outlet. Through the grounding lug.


Try on device in state, like IMG_20111029_173526.jpg , i.e. without grounding.

[walt]

which is the reason why the update fail,

step 8, error 0xfb. Failed to decompress upgrade file.   
Checking on 2 different USB storage.

[tinhead]

which is the reason why the update fail,

step 8, error 0xfb. Failed to decompress upgrade file.   
Checking on 2 different USB storage.

oh maybe file got broken, which one you tested?

[walt]

oh maybe file got broken, which one you tested?

for Hantek 5102.
tinhead, I download file 6 time, and its definitely different files.
 files have different lengths. Upload files in "raw-format" is not good idea, More better in common archive, to test the integrity of the file in standard Windows/Linux PC.

[tinhead]

oh maybe file got broken, which one you tested?

for Hantek 5102.
tinhead, I download file 6 time, and its definitely different files.
 files have different lengths. Upload files in "raw-format" is not good idea, More better in common archive, to test the integrity of the file in standard Windows/Linux PC.

file was broken, uploaded it again, check list on previous page