Products > Test Equipment
Rigol MSO5000 Power Supply
beatman:
I thing bypass caps is for audio big capacitance capacitors to get more quick charge discharge
Protegimus:
CapXon KF datasheet http://images.100y.com.tw/pdf_file/05-CAPXON-KF.pdf.
Panasonic FM better the specification of the crapxon part in terms of low impedance characteristic (and pretty much every other specification), datasheet https://www.mouser.co.uk/datasheet/2/315/ABA0000C1018-947496.pdf.
Panasonic FR and KEMET A series are also classed as low impedance parts with suitability for use in PSUs, again bettering the specification of the crapxons. Sighound36 has generously already shared his positive results. If you can find improved alternatives that fit, then please post your recommendation and references.
Addressing the question of why bypass. Take a look at the attached PYJD_PB0575_V1.00 bypass capacitors_02 image.
I've highlighted red C12-C16 ceramic SMD capacitors Rigol fitted for the same purpose, i.e. additional noise filtering.
I've just taken that further and also bypassed on the first part of the CRC filter, whereas Rigol implemented it on the latter. Capacitor values set the corner frequency for the filter, hence the use of additional values.
Yes, the methodology is extensively utilised in high quality audio equipment.
Fesz Electronics has some excellent videos, including a series on decoupling capacitors
Can we leave it at that re bypassing so as not to lose focus on the PSU. It's up to you whether you want to implement it and if you want to start a detailed discussion you're free to open another thread.
Also attached is the updated BoM v0.2
Not all components are fully identified, e.g. CS1, as some of the PCB silk screen is obscured by gunk. It's a work in progress, amendments/corrections are welcome.
Protegimus:
Additional information on disassembly available in the MSO-5000E manual available here:
https://www.rigol.eu/Public/Uploads/uploadfile/files/ftp/%E6%96%B0%E8%B5%84%E6%96%99%E5%BA%93-%E5%90%AB%E6%89%8B%E5%86%8C%E5%9B%BA%E4%BB%B6%E8%BD%AF%E4%BB%B6/%E5%AE%98%E7%BD%91%E8%B5%84%E6%96%99/DS/%E6%89%8B%E5%86%8C/MSO5000-E/EN/MSO5000-E_ServiceGuide_EN.pdf
MSO-5000E limited 2 channel 150MHz bandwidth version, but chassis is the same.
ballsystemlord:
--- Quote from: Protegimus on July 08, 2023, 06:16:29 am ---Can we leave it at that re bypassing so as not to lose focus on the PSU. It's up to you whether you want to implement it and if you want to start a detailed discussion you're free to open another thread.
Also attached is the updated BoM v0.2
Not all components are fully identified, e.g. CS1, as some of the PCB silk screen is obscured by gunk. It's a work in progress, amendments/corrections are welcome.
--- End quote ---
Thanks for getting back to me.
I wasn't trying to take the thread some other direction. Just understand why you made the decisions you did. Being a student, there's still a lot IDK about electronics.
tautech:
--- Quote from: ballsystemlord on July 08, 2023, 01:06:56 pm ---
--- Quote from: Protegimus on July 08, 2023, 06:16:29 am ---Can we leave it at that re bypassing so as not to lose focus on the PSU. It's up to you whether you want to implement it and if you want to start a detailed discussion you're free to open another thread.
Also attached is the updated BoM v0.2
Not all components are fully identified, e.g. CS1, as some of the PCB silk screen is obscured by gunk. It's a work in progress, amendments/corrections are welcome.
--- End quote ---
Thanks for getting back to me.
I wasn't trying to take the thread some other direction. Just understand why you made the decisions you did. Being a student, there's still a lot IDK about electronics.
--- End quote ---
Thinking they know better than designers.
Nothing wrong with CapXon caps when design and application meets their spec.
Never had any issues with them in gear we sell in 10 yrs.
Don't believe all that is spouted on forums.
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