Author Topic: GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?  (Read 4074 times)

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Offline cyberfuzzy

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GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?
« on: December 17, 2014, 08:04:12 pm »
Hi,

The bandwidth of the GW INSTEK GDS-1022 DSO is limited to 25 MHz. The top model of the GDS-1000 series is the GDS-1102 with a bandwidth of 100 MHz.

Does anyone know if all of the GDS-1000 series scopes have the same hardware?

I was wondering if it is possible to do a hardware hack to upgrade the bandwidth of the GDS-1022 up to 100 MHz.

In a German forum Mr. Thilo M. wrote that he updated the bandwidth of a 60 MHz scope to 100 MHz by changing some DIP-switches inside. You can find the discussion here: http://www.mikrocontroller.net/topic/107317#1006671

So if that is true - does anyone know how to set the DIP-switches to upgrade it to 100 MHz?

And would the hack depend of the scope's firmware version?

Thanks’ for your answers.

Cyberfuzzy
 

Offline ElektronikLabor

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Re: GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?
« Reply #1 on: December 17, 2014, 08:08:11 pm »
DIP-switch? It sounds too good to be true.
Why don't you just open the scope and look inside?
 

Offline cyberfuzzy

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Re: GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?
« Reply #2 on: December 17, 2014, 08:12:05 pm »
DIP-switch? It sounds too good to be true.
Why don't you just open the scope and look inside?

Yes, that would be the next thing to do. I just wanted to know if anybody already has experience with it.
 

Offline cyberfuzzy

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Re: GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?
« Reply #3 on: December 17, 2014, 10:29:16 pm »
I opened it up and I couldn't find any DIP-switches. But as you can see in the attached image there is a 0 ohm resistor at 1022.

I thought that's it. But after moving it to 1102 nothing changed. The bandwidth is still limited to 25 MHz.

It would be interesting to see a picture of the 0 ohm bridges of a real GDS-1102. Maybe there are more resistors on A, B, C or D?
« Last Edit: December 18, 2014, 12:56:49 am by cyberfuzzy »
 

Offline cyberfuzzy

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Re: GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?
« Reply #4 on: December 18, 2014, 12:55:50 am »
I tried all 16 combinations with 0 ohm resistors at A, B, C and D. But that didn't change anything.

Any other ideas?
 

Online tautech

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Re: GW INSTEK GDS-1022 Hardware Hack: 25 MHz -> 100 MHz?
« Reply #5 on: December 18, 2014, 01:23:15 am »
Maybe its likely a firmware update AFTER HW changes will update the BW.  :-//
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