Products > Test Equipment
Picoscope Hack
markone:
--- Quote from: _Wim_ on December 05, 2022, 08:17:39 pm ---
--- 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...)
--- End quote ---
One method would be desolder resistors placed in series, much less fragile and marked and easy to replace, but it's not worth doing it if you are not interested to perform an AC simulation.
egonotto:
Hello,
I paid about 950 € for the PS 5243A in 2015 and about 1972 € for the PS 5444B in 2017.
Best regards
egonotto
markone:
--- Quote from: egonotto on December 06, 2022, 04:23:01 am ---Hello,
I paid about 950 € for the PS 5243A in 2015 and about 1972 € for the PS 5444B in 2017.
Best regards
egonotto
--- End quote ---
5444B seems no more available, there is 5444D at 3700 euros ...:o (or even more, depending on the seller)
jasonRF:
--- Quote from: markone on December 05, 2022, 09:28:19 pm ---
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.
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Sure, they are expensive compared to budget benchtop scopes made by Rigol/Siglent/Instek/etc. But early this year I was in the market for a USB scope upgrade where I wanted 2 channels and at least 100 MHz bandwidth, along with deep memory, large FFTs, serial decoding and either high-res mode or digital low-pass filtering. I did not find any viable options besides Picoscope. Sure, you can find cheaper USB scopes with reasonable hardware specs manufactured by Owon or DreamSourceLab or others, but you just do not get the rest of the capabilities. My budget was too low for a 2208B (or even a 2207B), so I shopped ebay for a handful of months until I found something I could afford. I would have been happy with a 2000 or 3000-series, but the first good option I found was a 5244B that I picked up for $450 US.
I think a lot of the Picoscope cost is due to design and manufacturing in the UK (at least both of mine are made in the UK), relatively low sales volumes, and the superior software/firmware. If a company like Owon decided to be serious about their software, they could give Pico enough competition to force prices down, but this doesn't seem likely to happen any time soon.
jason
Scratch.HTF:
Has anyone tried to upgrade the waveform memory (DDR2 SO-DIMM) in a PicoScope 6000 series (mine is a 6403B with 512 MB common memory; the 500 MHz model can have up to 2 GB common memory) and if so, does it require a code and/or different control software to enable the extra memory?
If the memory can be upgraded, is it also possible to upgrade beyond 2 GB using a special code or different control software if necessary?
From what I know, the PicoScope (with removable memory) uses SO-DIMM memory modules and there are no registered SO-DIMM modules out there (registered modules are typically required in workstations and servers with more than four DIMM slots and therefore, there was no need for registered SO-DIMM modules) - the pictures at https://www.eevblog.com/forum/testgear/picoscope-pico6402a-6404d-teardown/ show a Texas Instruments IC on the SO-DIMM which is most likely used for signal termination to prevent ringing at very high speed.
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