Products > Test Equipment
Picoscope Hack
_Wim_:
This is the schematic front end until first amplifier
EDIT: added resistor at offset input, as markone was correct, this caused confusion
2N3055:
My 3406D was 2100€ few years ago when I bought it and worth every penny...
My 12000€+ Keysight MSOX3104T has 4MPts sample memory.
3406D MSO has 500Mpts...
I bought it for decoding and for high end features in software, SDK and FRA...
I also have 16bit Pico 4262 that is absolutely unique. At 1000€ it has specs no other scope has at any price..
And I also have 4824A that is 20MHz 12 bit 8 channel scope.. It is not 200€, but go find 8ch 12bit scope that is not 10x more. etc etc...
Fact is, my two 12 bit Siglents mostly replaced MSOX3104T in use, but not Picoscopes...
When it's time for Picoscope, it's time for it.
I agree that their pricing is not following the same logic as some other manufacturers. But it is special product in many ways..
markone:
--- Quote from: _Wim_ on December 05, 2022, 07:52:24 pm ---This is the schematic front end until first amplifier
--- End quote ---
I guess there is a resistor in between offset setting and opamp negative input.
10pF and 7pF capacitors were actually measured ?
_Wim_:
--- Quote from: markone on December 05, 2022, 08:08:12 pm ---I guess there is a resistor in between offset setting and opamp negative input.
--- End quote ---
Yes, I did not further draw that part => Edit => now updated in the schematic above
--- Quote from: markone on December 05, 2022, 08:08:12 pm ---10pF and 7pF capacitors were actually measured ?
--- End quote ---
They were measured in circuit with my HP 4276A, so that will not be very accurate. For most caps I could not even get a reading, but for the onces I did, take them certainly with a grain of salt (I did not fance desoldering them all risking that one "jumps" away or is damaged in the process...)
markone:
--- Quote from: 2N3055 on December 05, 2022, 08:05:32 pm ---My 3406D was 2100€ few years ago when I bought it and worth every penny...
My 12000€+ Keysight MSOX3104T has 4MPts sample memory.
3406D MSO has 500Mpts...
I bought it for decoding and for high end features in software, SDK and FRA...
I also have 16bit Pico 4262 that is absolutely unique. At 1000€ it has specs no other scope has at any price..
And I also have 4824A that is 20MHz 12 bit 8 channel scope.. It is not 200€, but go find 8ch 12bit scope that is not 10x more. etc etc...
Fact is, my two 12 bit Siglents mostly replaced MSOX3104T in use, but not Picoscopes...
When it's time for Picoscope, it's time for it.
--- End quote ---
All the models that you listed are quite peculiar/unique, this does not apply to ordinary models, especially 2000 series, that i would consider overpriced for USB2.0 devices.
I was tempted for a 3000 series, but sweet spot SKUs are not available at all.
--- Quote from: 2N3055 on December 05, 2022, 08:05:32 pm ---I agree that their pricing is not following the same logic as some other manufacturers. But it is special product in many ways..
--- End quote ---
That's my point, they are increasing prices also for old models when "some other manufacturers" are improving day by day specs and listing cost and often make sales campaign.
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