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Possible GW Instek GDS-1000B hack

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nctnico:
My GDS2204E goes over 300MHz with the 300MHz uphack. I'd expect the GDS1054B to also achieve the extra bandwidth.

Mortymore:
After Vytautas stated that he updated his GDS-2072E to 300MHz, I start thinking about why was my IDS-2074E stuck to 200MHz.

I start playing with the most recent licences, because I updated my scope some time ago, before the latest code released by tv84. Messing around with them, the scope kept stating that the licenses were already installed, until... i tried the 100MHz. Result: my scope downgraded form 200 to 100. Nice!  :palm:
Trying to reinstall 200 or 300 licences didn't work. Scope "said" that they were already installed, but didn't get me there. It was stuck in 100MHz.   |O
OK! Time to play with the scope once again, to fix my mistake.  :box:

Solution:


--- Quote from: wgoeo on July 14, 2017, 11:25:44 am ---I think it is sufficient to restore the /home/dso/OptionConf file if you want to remove the installed licenses.

--- End quote ---

1) Downgraded the firmware to 1.21b6 and establishing an SSL connection to the scope deleted the file OptionConf. EDIT: Be very careful not to delete all files or the folder
2) After that, just a quick check to system info, and the bandwidth info was gone (as expected).
3) Upgraded the firmware to the latest 1.38.
4) Installed licences (2nd version - tv84), among them the 300MHz BW and it was accepted this time.  :-+

I realise now that I certainly did the mistake of install the 200MHz the first time I upgraded my scope and that disabled the possibility to reach the 300MHz back then.
So... avoid playing with lower bandwidth licences if you don't want to restart the hack process again. 

But in the end, if it wasn't for my mistake, my scope would still be stuck in the 200MHz. Another lesson learned. I think   ::)

PS: Now I realize... the TEK P2220 and P2200 probes I was using with the scope, became "short". Any advise for some 300MHz probes?

Mortymore:
Not to good input 2 replies in a row but this one has nothing to do with the previous.

Thing now is... casually found that Voltcraft has a series DSO-1000D that is for sure a rebranded  GW-Instek GDS-1000B

In the Conrad website found 2 versions:
VOLTCRAFT DSO-1074D Digital 70 MHz 4-channel 250 MSa/s 10 Mpts 8 Bit Digital storage (DSO), Spectrum analyzer
VOLTCRAFT DSO-1104D Digital 100 MHz 4-channel 250 MSa/s 10 Mpts 8 Bit Digital storage (DSO), Spectrum analyzer

The "title" is curious.
1st advertised as being "4-channel 250 MSa/s", an honest way to put things, since it will be what you get with 4 channels active, but the usual way is more like "4ch and 1GSa/s", being 1GSa/s attained with only 1 channel active.
2nd the Spectrum Analyzer. Was this option available on any of the GW-Instek 1000B variants? Or only by hack added?

Decided to share this information since it could be of interest to someone that has one of this Voltcraft scopes, and through Google may end up here in Eevblog forum.

PS: As far as I know, we have as rebranded GW-Instek 1000B or 2000E the following: Iso-Tech, RS Pro and Voltcraft

Herbertl:

--- Quote from: wgoeo on July 10, 2017, 08:02:10 am ---It seems like the options and bandwidth upgrades (up to 300 MHz) can be unlocked using a file in a USB drive. I was wondering if someone is willing to share the newer firmware update (in case the unlock feature is removed) and possibly test the unlock files.

--- End quote ---

Interesting.

Is GwInstek recommendable? The specs sound good, the price too.

Mortymore:

--- Quote from: Herbertl on April 28, 2019, 03:24:19 pm ---...
Is GwInstek recommendable? The specs sound good, the price too.

--- End quote ---

Recommendable as a scope in the $500 range, yes. If it's the best for you, depends on what you are looking for and your preferences.
There are a few threads in the forum about GW-Instek vs Rigol vs Siglent, mostly, since they are probably the brands in this price range that are most searched.
Take a look at them, but don't get scared by some passionate opinions you may find in the way.  :rant: It's all Eevblog family affairs.  :popcorn:

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