Please make it simple and tidy. I've seen less dense concrete bricks than your message
Neither I can test anything as mine is FW 3102.
» Nobody said FW3203 is compatible with existing FW3200/3202. It might be some small design change causing the spikes...
» 2022.02.10 and 2022.02.18 have
exactly the same scope software.
» 2022.02.10 doesn't modify the fpga, 2022.02.18 updates it to FW3203.
So please stop using those endless filenames. FW3202 and FW3203 is more than enough.
» Any Hantek update will make a factory reset, you always should calibrate it afterwards.
» Given this, the simplest method would be to stay in 2022.02.10, switching between FW3202 and FW3203 with FW changer, always calibrating before doing any tests.
Hmm...
- Step up the battery to 250V to power the mains converter (loses)
- Step down to +-8V , +5V (more loses)
The heavy load goes into the 5V line.
I have to measure it, but +-8V is for the analog frontend and probaly have low consumption, I suspect 200mA at most.
My idea is to replace the power supply with another of 9V 5A, connecting a 4P2S battery (With charging circuitry and protection) to the output, so it'll simply charge from the power supply.
Battery output goes directly to +8V, the other voltages will be sourced by adding a buck converter for +5V and a negative converter for -8V.
Removing the noise from these small 1MHz buck modules should be much easier that 20-40KHz.
I might do nothing in the end!