Products > Test Equipment
Siglent SDS1000(X) / SDS2000(X) or LeCroy WaveAce (Blackfin) hacks?
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tv84:

--- Quote from: KeBeNe on August 14, 2018, 03:50:01 am ---here is my HW mod on 2104x, this changed the 3db limit from around 250Mhz to 350Mhz

--- End quote ---

That's precisely what is visible in Dave's teardown, right? His 2304 doesn't have those caps!

So, if the HW change is only removing those caps, I can provide the "cosmetic" sw change.
markus_jlrb:
@tv84,

But please take into consideration, that this caps are already removed
in the pics you provide for the SDS2204X dso that only provide about
225MHz -3dB BW.

So parhaps the caps value itself makes the difference.

Markus
tv84:

--- Quote from: markus_jlrb on August 14, 2018, 12:51:48 pm ---@tv84,

But please take into consideration, that this caps are already removed
in the pics you provide for the SDS2204X dso that only provide about
225MHz -3dB BW.

So parhaps the caps value itself makes the difference.

Markus

--- End quote ---

If the SDS2204X does not have the caps (as you noticed), then the other components must make the difference.

We'll have to try measure the others components that are hand-soldered.

But, Markus, the PCB that I showed is not precisely the same as Dave's (and KeBeNe).
markus_jlrb:
Dear's

need some help identifying the attached ic's.
Have found them when looking deeper inside
the sds frontend amplifier stage.

One of them could be TI's ADS7822 (12bit ADC 200kHz)
the other named AUE7256 is unkown to me.

And hints which manufacturer and which type these
eight pin ic is.

Thanks in advance for any helpful info.

Markus
tv84:

--- Quote from: markus_jlrb on August 14, 2018, 06:25:27 pm ---the other named AUE7256 is unkown to me.

--- End quote ---

It looks like 7258, not 7256.
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