Products > Test Equipment
Hacking the HDO1k/HDO4k Rigol 12 bit scope
Antonio90:
--- Quote from: Frex on December 30, 2023, 01:46:54 pm ---Hello,
I'm an happy owner of the Rigol DHO1074 tha fit well side by side on my desktop with my Siglent SDS1204X+.
I thank you very much all people that has contribued to become it hackable.
I performed it as desribe without issue. Thank's again to all of them ! :-+
I played with the DHO1074 today, and I noticed a strange thing.
The full sampling rate is only acheveiable on CH4.
On all others channels, I can get only 1G/s (one channel active at same time).
As writed in manual, full sampling can only be obtainable wih only one input active but that not on a specific channel.
Another point is if I enable 2 channels other than the CH4, the sampling rate is limited o 500Ms/s instead of 1Gs/s !
All seem to work same as if an "hidden" channel would be active ...
(It count 3 instaed of two acive channel)
Does anyone here had seen he same behaviour on his scope ?
Regards.
Frex
(Note: firmware installed is 00.02.04, hardware 2)
--- End quote ---
Hi, maybe you already checked that, but are you sure the scope wasn't triggering on an "inactive", different channel? I find it quite unlikely that a bug like this has gone unnoticed so far.
Frex:
Hello and thank you for your (fast) answer Antonio90.
I seem you are right.
I discover that if the trigger is set even on an unused channel, it count as an active channel !
Now I understand this strange behaviour...
Thank you again ! ^-^
Frex
Antonio90:
No probs! I guess triggering is digital, and as such it needs sampled data.
ebastler:
After playing with my DHO1074 Christmas present for a while, I thought I'd apply the basic upgrades (memory & bandwidth). Nasty surprise: After connecting via the adb tools, I can't find a key.data file, neither in /rigol/data nor elsewhere in the file system.
Have other DHO1074 owners seen this (or rather not seen this) too? Am I just overlooking something or did I miss a step?
In case there is no simple solution -- I have searched the forum and come across early posts which mention that the same information is also stored in the FRAM. I also found a tool which is meant to dump the FRAM, so I could presumably get to the key.data information:
https://www.eevblog.com/forum/testgear/hacking-the-hdo1khdo4k-rigol-12-bit-scope/msg4501300/#msg4501300
But I am out of my depth there. There is a Go program attached to that post -- is it meant to run on the scope itself? If so, how do I get it to run? If it is meant to run on the PC, how does it get the FRAM data? Many thanks for some helpful hints!
voltsandjolts:
My scope had key.data in /rigol/data
--- Code: ---D:\adb>adb shell ls -l /rigol/data
total 992
-rwxrwxrwx 1 system system 388 2023-01-09 18:58 Key.data
-rwxrwxrwx 1 system system 101 2023-11-29 10:01 RLU.lic
-rwxrwxrwx 1 system system 1260 2023-01-09 19:41 cal_adc.hex
-rwxrwxrwx 1 system system 732 2023-01-09 19:41 cal_adc_SpuGain.hex
-rwxrwxrwx 1 system system 458972 2023-11-23 21:12 cal_afe.hex
-rwxrwxrwx 1 system system 348 2023-01-09 20:24 cal_afe_bandwidth.hex
-rwxrwxrwx 1 system system 588 2023-01-09 19:22 cal_afe_zero.hex
-rwxrwxrwx 1 system system 36 2023-01-09 19:39 cal_ext.hex
-rwxrwxrwx 1 system system 796 2023-01-09 19:30 cal_lsb.hex
drwxrwxrwx 2 root root 4096 2022-12-06 22:31 default
drwxrwxrwx 2 root root 4096 1970-01-01 08:09 probe
-rwxrwxrwx 1 system system 200 2023-01-10 10:54 vendor.bin
--- End code ---
The Go program runs on your PC, need to install Go compiler.
Oh, different Go script, didn't know about that one and I too don't know how that works...gimmie a minute
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