Sniffing the Rigol's internal I2C bus

[alank2]

So for people who've installed the custom ds4000 firmware, does your system info show a different model after unloading/reloading a key?

[AndersAnd]

connected Gen to DS2072(updatet) through a 50 Ohm Termination (which is also linear up to 1 GHZ)
my 3 dB Frequency was 344 Mhz
up from 344 Bandwith goes down dramaticaly and over 380 Mhz Scope does show frozen Signal and Frequency

What hardware version is your scope?
It would be nice if everyone doing BW tests wrote both hardware and firmware version, to see if there's any differences between for example HW ver. 1.xx and 2.xx.
And for example if they use a modded 350 MHZ or 500 MHz firmware.

[oe6kyg]

system info shows  DS2202
Software 00.01.01
Hardware 2.00

did Update to 200mhz

[AndersAnd]

system info shows  DS2202
Software 00.01.01
Hardware 2.00

did Update to 200mhz

So you didn't use any of cybernet's custom firmwares but only did a keygen upgrade to 200 MHz and you measured BW was still 344 Mhz?

[cosmos]

So for people who've installed the custom ds4000 firmware, does your system info show a different model after unloading/reloading a key?

I did not have to do anything to the installed (riglol generated) keys and they all stayed.
The model number was still DS4014.

[alank2]

I did not have to do anything to the installed (riglol generated) keys and they all stayed.
The model number was still DS4014.

This may have already been asked - do you see the bandwidth options under each channel now?  (20M, 100M, 200M).

If you unload/reload your key you might possibly get the DS4054 label.  (no guarantees, it might be taking a risk to try).

[Gallymimus]

This may have already been asked - do you see the bandwidth options under each channel now?  (20M, 100M, 200M).

If you unload/reload your key you might possibly get the DS4054 label.  (no guarantees, it might be taking a risk to try).

Yes, asked and answered a few pages ago.

yes BW options are now: OFF, 20M, 100M, 200M

selecting 100M I get about the same rise and fall as I had before (~2ns).
selecting 200M I get around 1.5ns
selecting OFF I get mostly 1.28ns rise and 1.16ns fall (for the others it also like that with slightly lower number for fall time)
If I measure with cursors I get the same results (knowing that the IO is driven from 2.5V rails I can set the 10% and 90% referred to that)

[Co6aka]

If you unload/reload your key you might possibly get the DS4054 label.

I already did. It (still) doesn't. Not likely possible it seems.

[Co6aka]

The input of the DSA815 is MUCH more accurate than the output...

FWIW...

I have one of these: http://www.home.agilent.com/en/pd-1000004297%3Aepsg%3Apro-pn-E4438C/esg-vector-signal-generator
And one of these: http://www.aeroflex.com/ats/products/product/Communications_Test/Radio_Test_Sets_-_PMR_Test/2948B_Comm_Monitor~4.html
And one of these: http://www.minicircuits.com/pdfs/PWR-4GHS.pdf

But I'm currently in heavy-construction mode otherwise I'd already have posted the verdict. I should be able to run and document some definitive tests by the end of the week. Unless someone beats me to the punch.

Forgot to add: I also have a DSA1030A-TG3, which while an OK piece of kit, wasn't all that accurate out-of-the-box. (At least according to my other big guns, which are all calibrated.)

[Co6aka]

Alright... Curiosity got the better of me, and since most fortunately I don't have to deal with the incessant nagging of a female, I set up some gear on the kitchen table:

Sig-gen: E4438C
RF power meter: PWR-4GHS
Cable: Some kind of funky 6GHz-rated flexible stuff with Huber-Suhner silver/gold connectors.
Unfortunately I don't have a BNC-female to N-female adaptor, so I had to improvise. (Apparent adapter loss, about 0.1dBm at 50 to about 0.2dBm at 1G, is "calibrated out" of my figures.) Everything "warmed up" for about 90 minutes; ambient temp was pretty stable at 22.5 degrees C.

Using a pure unmodulated sine wave carrier, I "calibrated" the E4438C and cable at 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000MHz, for almost exactly 0dBm. (The smallest steps the E4438C can do is 0.02dBm, so...) Accuracy stats for the power meter are on MiniCircuits site. (FWIW, according to the power meter, the E4438C is "off" +0.08dBm at 50MHz, which gradually changes to +0.22dBm at 1000MHz.)

Set up the DS4014 for 50-Ohm inputs and no BW limit. Here are the measured RMS voltages...

50MHz: 223mV
100MHz: 221mV
200MHz: 219mV
300MHz: 214mV
400MHz: 212mV
500MHz: 207mV
600MHz: 179mV
700MHz: 149mV
800MHz: 121mV
900MHz: 91mV
1000MHz: 58mV

So now yous guyz could do da math, I'm...    (Fuhgeddaboudit!)

(-3dB point about 650MHz)

PS- All four channels were within a mV of each other.

[Gallymimus]

-3db at about 157mV or ~650MHz.  Seems kinda high.

Plot of Co6aka's data for reference attached.  Thanks for taking those measurements man! 

         

edit: fixed incorrect frequency axis label 

[Rigol-Friend]

Gallymimus:

There is a small mistake in your plot: Frequency...

[Gallymimus]

Gallymimus:

There is a small mistake in your plot: Frequency...

Crud, I'll fix that, thanks

edit: Fixed

[Abdu]

DS4014 frequency response based on Co6aka measurements.

[oe6kyg]

So you didn't use any of cybernet's custom firmwares but only did a keygen upgrade to 200 MHz and you measured BW was still 344 Mhz?

that is what i measured

[Power Designer]

Hello,

I got a brand new unmodified DS2202_A_. So I would like to help to enhance the situation... 

I don't have mature experience in hacking this sort of stuff. How can I help you guys? Are there any pointers how to create a memory dump from this beast? Where to send the dump? 

Please don't hesitate do contact me with your requests... 

I too now have a DS2202_A Rigol Oscilloscope. I purchased this online, was meant to be a DS2202, but I was upgraded to this unit as delivery was taking too long. I suspect this one simply supersedes the DS2202, as it is exactly the same, but includes a 50 Ohm impedance option, and CAN bus decoding! This really tips the scale for me on an already very fine piece of test gear. Being a hobbyist, I could not afford the typically more expensive 'scopes that we use at work (Tektronix) and I am very pleased with this purchase. A very well made scope, along with all the bells and whistles. But enough about that, I have tried to some of the solutions here (IE install NI runtime and DS tools etc) to try and get the options installed but they don't work (doesn't surprise me, the guys here appear to have done such a good job at getting past such measures, some changes by Rigol were inevitable).

Being such a new scope, nobody has probably had the time/opportunity to take a look under the firmware hood of this scope. Has anybody had any success with the option keys on this scope yet? I might have missed something on the forum. If not, can I help in some way? I know you were asking for a .GEL file for the firmware, but I was unsuccessful in locating firmware upgrades on Rigol's scopes. Perhaps I have to work through the dealer. Anyway, assistance is appreciated, I would love to have all the features (especially trigger features) enabled, as they can be extremely useful at times, but my budget is already blown and there is no way I can go parting with hundreds of dollars for these options.

[AndersAnd]

Being such a new scope, nobody has probably had the time/opportunity to take a look under the firmware hood of this scope. Has anybody had any success with the option keys on this scope yet?

No, as mentioned earlier the private key seems to have been changed for DS2000A, so none of the DS2000 keys works for DS2000A.

If not, can I help in some way?

As mentioned earlier, do a JTAG memory dump.

I know you were asking for a .GEL file for the firmware, but I was unsuccessful in locating firmware upgrades on Rigol's scopes. Perhaps I have to work through the dealer.

As mentioned earlier, there doesn't seem to be any firmware updates available for DS2000A yet, but of course it doesn't hurt to ask again, maybe a new one has come out now.

[StepDIR]

Can someone give me step by step instructions for upgrading the firmware on a DS2072?

I am expecting the CH1 light on while upgrading and then all lights on when complete.  My DS2072 goes immediately to all lights on with no upgrade.

[marmad]

Can someone give me step by step instructions for upgrading the firmware on a DS2072?

I am expecting the CH1 light on while upgrading and then all lights on when complete.  My DS2072 goes immediately to all lights on with no upgrade.

Bottom of this post.

[StepDIR]

Thanks Marmad but that is what I have been doing and it doesn't load.  I'll keep researching maybe someone else is having this problem.

[marmad]

Thanks Marmad but that is what I have been doing and it doesn't load.  I'll keep researching maybe someone else is having this problem.

Reformat the USB stick you're using and/or try a different USB stick.

[Gallymimus]

Thanks Marmad but that is what I have been doing and it doesn't load.  I'll keep researching maybe someone else is having this problem.

Did you try a different flash drive?  Some people have had issues with large drives or certain brands.  You might just try a few different blank drives.

[SeanB]

Definitely use a drive under 4G, preferably an older one of under 1G. I keep some older ones around because older firmware will not support large drives reliably or at all.

[staze]

Some USB sticks don't work sometimes. I would try another.

Also, as for the checksum question, it would be good to have only to confirm the download and thumbdrive copy are intact. It at least cuts out a sanity question.

[StepDIR]

I've tried two different USB sticks.  One is under 1G.
Tried FAT16 and FAT32.

Is the name of the GEL file important or just the fact that it is a GEL file enough?