Products > Test Equipment
Upgrading the Hantek DSO4072C and DS4104C oscilloscopes bandwidth up to 250MHz
spippolone:
I have a DSO4072C I will try to update .. but I have 2 question:
the first, when you turn on the generator, default output amplitude is 2 V .. I would like to star from 0 Volt, because if I test a Final Audio amplifier without volume control I sign in with too much signal.. I must be remember to set the output before turn on the amplifier...
Some one can see if in the firmware is possible change a value to start in 0 Volt when the generator it is turn on ??
the second, has anyone tried to increase the maximum frequency of the internal generator ??
I hope to see a solution Thank you for all
kutukvpavel:
I'm interested in the LAN port too, since keeping scope ground tied to PC ground doesn't seem like a good idea. "System settings" menu has a tab called "network", but it's grayed out.
I briefly looked with IDA into decrypted firmware upgrade packages for 4XX2C [password dso4000bc] and 4XX4C [password dso4000c]. They differ immensly: the 2-ch version is just a custom linux build, the 4-ch models utilize a custom Android build. While 2-ch version does check the system.inf for network capabilities, I wasn't able to find any code that would actually handle ethernet interface (though I didn't look too thoroughly, because I own a 4-ch one, so I focused on them primarily). Probably devices that included optional LAN interface were shipped with a modified firmware that is not publicly available. Things definitely look better for 4-ch models, I successfully identified many pieces of network code in their firmware.
The problem is, I haven't yet found how this feature is activated. The 4-ch firmware doesn't look for [net] section in system.inf, see screenshot (all fields that it gets from system.inf that I was able to identify, the ones I couldn't identify are never read, only written). The firmware simply counts the number of available devices under /proc/net/dev, and that's it, no additional checks at all. I am starting to think that no software "key" is needed, because the board physically lacks a standalone ethernet controller. This theory is supported by a boot log I found at https://sigrok.org/wiki/Hantek_DSO4004C_series/Info, it suggests that we lack DM9000 chip (or a compatible one) on our board. I'll have to check where the traces go from the transformer footprint, because I don't remember any LQFP100 footprint on the board. And an IC footprint near the transformer doesn't look familiar to me.
McJanDK77:
Is there a guide for the terminal what i have to type in for do it to change my DSO4104C to a 250MHz ?
McJanDK77:
Please some one Help !!!! Is this a dead forum or are people just ignoring ?
BillyO:
Tera Term should do it.
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