Products > Test Equipment
Siglent SPD3303X-E Hi-Resolution Output Unlock?
saabracer23:
Hello all, first off. I appreciate this communities work. I recently picked up an SPD3303X-E and would love to increase its resolution. Just curious if any more progress has been made on the units with the newest firmware.
Dan
Jack24044:
Hi Dan, that is a very nice PSU! I have the same hardware and software version, I think all new units ship like this.
Unfortunately Siglent has not yet released the firmware for this model SPD3303X (V6.2), which requires 1.01.01.03.11R1 or higher.
I have not seen any convincing evidence that anyone has upgraded this, or should I say downgraded it, as there are only lower firmware versions available.
Siglent warns that these are not for V6.2 hardware. If you try, you may encounter a problem, the unit may not work and there is certainly no way back to 1.01.01.03.11R1 (not available).
The only solution would be to have it replaced under warranty in that case.
The software to downgrade the firmware tells you that the software is not intended for your hardware. That software can be patched in such a way that it can potentially download the untested lower firmware version to the power supply, with uncertain results.
I think we just have to wait until the right firmware is available from Siglent.
It's just fun to improve your model of the power supply, but for me the 10mV resolution seems sufficient.
The link to monitor:
https://www.siglenteu.com/service-and-support/firmware-software/dc-power-supplies/#spd3303xx-e-series
I have a few Siglent instruments, most of them "upgraded" via this forum (to SDS2504 Plus, SSA3032X Plus, SDG1062X, SDG2122X), and options enabled.
The SDM3065X is an original unit. Someone is adding a digit or two to lower models, although that may be a bit useless, because the hardware is not the same and not as accurate, seen from the specifications.
The SPD3303X-E is on the wait-list, but I don't really need to upgrade it. Eventually I may pick-up an SPD4306X.
ironcurtain:
To recap:
* 1.01.01.03.11R1 comes with most if not all the 6.2 HW models (everything manufactured since at least early 2024)
* 1.01.01.03.11R1 is NOT available from Siglent. They should provide this to repair shops and distributors, if not the end users, to be able to do repair and upgrade work on newer units, especially if people are messing about the firmware (this might void calibration, but NOT hardware warranty, at least in Europe)
Someone (@ttssyy I believe) did a successful downgrade to 1.01.01.03.10 and obviously it is working per his photos.
@Jack24044, can you give us a no frills executive summary of what you actually attempted and failed? Exact versions, modifications, links to whatever it is you followed to do them, etc. No subjective impressions or concerns, just the objective recipe of what you did (regardless of outcome).
We can work from there. I can easily load EasyPower (regardless of version), find the function responsible for verifying the firmware and target product ID, and verify if the patch is correct.
To the best of my knowledge there is no downgrade protection in ANY Siglent product. That just does not exist. If anything, there are some internal product checks that will make the firmware flashing process fail right at the beginning, with no brick possible.
Firmware downgrade protection requires blowing e-fuses. That ain't happening with any of their "hackable" products.
Siglent does not want additional tech service workloads and they know very well they cater to us poor hobbyists who can't buy quarter mil test equipment.
ironcurtain:
--- Quote from: tv84 on June 13, 2024, 02:35:50 pm ---Looking at the .exe code, I would say STM32F207VET6.
--- End quote ---
I can recognize the ugly UI of IDA from miles away :-)
I will look into this as soon as I have time. I believe there used to be a method to extract the firmware without a lot of fuss. Anyone has a donor/available unit to do so?
Jack24044:
Hi IronCurtain,
this is what I did:
https://www.eevblog.com/forum/testgear/siglent-spd3303x-e-hi-resolution-output-unlock/msg5539925/#msg5539925
Kind regards,
Jack.
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