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Sniffing the Rigol's internal I2C bus

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icaro600:
Thanks Alex, your are right I meant 5ns
Thanks for your explanation, I will do it

Regards

probez:
I just received my DP832. But they shipped it with the new firmware 00.01.09.00.01 there doesn’t support downgrade. So the key generator doesn’t work. I have a DS2072A-s there is total unlocked at 300 MHz. The DP832 may have another protection but if not, it could be nice to have a custom based firmware to reveal a possible internal unique private key like the DS2000A scopes (https://docs.google.com/file/d/0B8yFRtbwGWr5QVBGS2NoMlo2WVU/edit). I guess the interest in the DS2000A series is more intensive than the DP800 series. But I have search around in the forum and found that I am absolutely not the only one there isn’t able to use the lovely keygens.
P.S. I would possible not need the features, but it would be fantastic to have all the features. I have of cause tried to firmware downgrade anyway but I can confirm it doesn’t work.

Software information
Digital Version: 00.01.09.00.01
Analog version: 01.02.00.01.02.00
Boot version: 01.06
Keyboard version: 01.01
Calibrated the 24th of Feb. at the factory

true:
GOOD NEWS ON THE SERIAL RESET PROCEDURE

I figured out the trick as to why it wasn't resetting. I could swear I covered this before.

The issue people are having is that they can't reset the SN even after following all the steps. The key (to which I didn't get an answer before but verified) is that there MUST be a valid key installed. Basically it won't work if there are no keys to uninstall. I made an xx0001 key for DSAZ, installed it, rebooted and then it worked :)

Follow these modified snmodfix instructions...


--- Code: ---1.  Requires 00.01.01.00.02 firmware (7777543 bytes, 0xa167ef30 crc32) named
       DS2000Update.gel in same directory as executable
2.  Execute snmodfix and specify serial and model to patch firmware
3.  Flash patched ds2000update.gel using power on help button method
4.  Restart scope
  4.1 After restarted, make sure a trace is showing
5.  Enable advanced system information menu (press Trigger Menu, Menu 7,
       Menu 6, Menu 7, Utility very quickly) to enable it
6.  Show system information - serial should be fixed but NOT saved to flash
      yet - some text labels will be missing (?)
7.  Connect using scpi and issue :SYSTem:OPTion:UNINSTall command which will
      uninstall all keys and save to flash
  7.1 If the info screen disappeared and the traces flashed, success! Move to step 8
  7.2 You don't have a key installed. Install a key for DS2A0000000001 with :SYSTem:OPTion:INSTall <key> - make sure the key has no dashes
  7.3 The screen should flash and the info screen should disappear along with the License installed message.
        If this happened proceed to step 4, otherwise you have no hope
8.  Once settled and the info screen disappeared restart scope
9.  Show system information (not advanced) should now show the correct serial
      and model
10. Update to latest stock unpatched firmware version
11. Storage -> Default
12. Reinstall any key(s)

--- End code ---

If this fails, something else I did was install the latest 3.00.xx.xx firmware - to replicate what I did, install it, at first powerup clear FRAM by holding left F6 (sixth softkey from the top on the left side) before turning on, then follow the instructions above.

metalphreak:
DS1000ZUpdate-v00.02.03.SP5.part1.rar - https://mega.co.nz/#!6RtykAiR!abG81x_vl89xTWZ9noAsmfcTVsWcInlZDdsDwkuOQEo
DS1000ZUpdate-v00.02.03.SP5.part2.rar - https://mega.co.nz/#!bVd32RhS!TqGQmeB6_oQQwMj5OZ9FFVr6ZEy5aVY2vpD0Ip7LWz8

Found on a chinese forum (with a link back to this thread) - clearly they were smart to host it locally ;)

Haven't tested it yet.


Rigol's website contact form is useless. I've asked twice now for firmware updates with no response.

Circlotron:

--- Quote from: alexwhittemore on April 24, 2014, 06:49:42 pm ---But then, finding a 1GHz bandwidth function generator is a tall order, so the REAL way to do it is to measure the rise time on a sharp-edged signal -snip- Anyway, once you know the rise time of an edge with assumed infinite bandwidth, rule of thumb is scope bandwidth = .35/(rise time). So if the rise time off my function generator square wave, is, for example, 56ns, .35/(56ns) = 6.25MHz.
--- End quote ---
I did it like this -> https://www.eevblog.com/forum/testgear/risetime-of-hacked-ds2072/msg321568/#msg321568
By that formula I got 243MHz.

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