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| The Rigol DS1052E |
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| darkith:
--- Quote from: Mark_O on April 01, 2010, 01:19:33 pm --- Which reminded me of a fable my grandmother once read to me, when I was just a lad... "Once upon a time .... weeping and wailing, and knashing of teeth. The best of days were behind them. THE END." --- End quote --- Mmmm...needs a postscript: "...but, it was later discovered that the wicked resellers had discovered this magical incantation previously, and after abusing it with their magical powers of relabeling, had been hawking the cheaper models as the high end models to the peasants for some time. So, while the the days of easy were over, the widespread knowledge of the magical incantation prevented the company from being deceived by it's resellers, completely loosing it's high-end profit margins, and being consumed in the fires of Mount Doom..."...oh, wait, wrong storyline. :) D. |
| Mark_O:
--- Quote from: darkith on April 01, 2010, 01:49:25 pm --- "...it was later discovered that the wicked resellers had discovered this magical incantation previously, and after abusing it with their magical powers of relabeling, had been hawking the cheaper models as the high end models to the peasants for some time..." --- End quote --- Cute! But was that really true (resellers were abusing it), or just conjecture? I know we had some speculation about the possibilities here... but no confirmation. I've known for quite some time* that there was potential for various abuses (ever since I first did a string dump from the firmware binary, and noticed the commands without "?", implying that S/Ns and Models could be changed :o). I was hoping no one would notice those, but I'm not the only one with a string dumper. After I uploaded the 2.02.02 firmware at the RCGroup forum, mxmxmx had pretty sharp eyes, and noticed it right away. As he also pointed out, there are other commands there that adjust various offsets, that could be used for individual unit calibration/compensation purposes. Or, to totally hose up your unit. - Mark P.S. *Just to be clear... When did I know about the commands to alter the S/N and Model? Back in November, when I downloaded the July update of the firmware binaries. When did I know that changing them would alter the performance characteristics of the scopes? The day that Andreas reported his findings here. |
| bushing:
(Thanks for the shout-out, Dave :) ) --- Quote from: anli on March 30, 2010, 12:29:50 pm --- --- Quote from: darkith on March 30, 2010, 12:08:56 pm ---It sounds like he parsed through a firmware file for the acceptable commands, either through just searching for strings, or actually dis-assembling the binary. You could try that, but there's no guarantee that the DS1000C series used the same method to select model...ie. it could have been done in hardware instead. D. --- End quote --- I have tried to find something MODEL-related - the only fragment with "model" (case-insensitive context) is: --- Code: ---DS1102CD DS1062CD DS1042CD DS1022CD DS1102C DS1062C DS1042C DS1022C DS1102MD DS1062MD DS1042MD DS1022MD DS1102M DS1062M DS1042M DS1022M DS-5110 DS-5106 DS-5104 DS-5102 Parameter Trig_Level_K Trig_Level_M Gain_A_K1 Gain_A_K2 Gain_B_K1 Gain_B_K2 Offset_1_A Offset_1_K Offset_1_M Offset_2_A Offset_2_K Offset_2_M ADC_Offset ADC_A_Offset_1 ADC_B_Offset_1 ADC_A_Offset_2 ADC_B_Offset_2 %6.1f CH1 %6d EXT EXT5 CH2 Trig_Sens_A =%6.1f Trig_Sens_K EquMin =%d EquTrigDelay RealTrigDelay RealTrigOffset Saving... %s SERVICE Model SerialID Save Clear Power Up 1/2 2/2 System Parameter Color About InterploatorScale Press 'Stop' key to Exit Press 'AUTO' key to load Default Value Press 'STOP' key to Exit --- End code --- --- End quote --- Yeah, the DS1052E firmware has strings like: --- Code: ---:STORAGE :STOR :TYPE? WAVEFORMS FACTORY SETUPS NONE :TYPE FACT :FACTORY :FACT :LOAD :INFO :SERIAL :SER :SERIAL? :SER? :MODEL :MOD :EQUTRIGDELAY :EQUTRIGDELAY? %1.2e :REALTRIGDELAY :SYSSERVICE :HARDVERSION :SAVEPARA :KEYS --- End code --- (anyone want to guess what a "factory" file is? It looks like you can load one up from USB drive through the front-panel buttons, too) |
| dimlow:
Factory reset! |
| DavidDLC:
I made the mod to my unit and yesterday took it to the office, I connected and Agilent RF generator and also a 100 MHz Tektronix oscilloscope, then I set the generator to multiples of 10 MHz frequencies like 10, 20, 30 ..... 100 MHz at a fixed voltage and measured the signal in both scopes and they behave pretty similar. Up to 90 MHz they were pretty close, from 90 to 100 MHz the difference was bigger but not that much. I'm really happy with the results I obtained and now I'm confident of the change. Well this was a basic comparison, if there is another comparison that will even give us better results, let me know and I will try to do it. |
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