The DS1052E has a 50Mhz maximum frequency, but it has exactly the same hardware (as far as the reverse-engineering folks can tell) as the DS1102E, which has a 100Mhz maximum. This guide will show you how to make the switch very easily using Linux. You can do it in Windows too, but it's a bit more involved, and Linux makes it really really easy.
I've attached the Rigol user guide for both units, in case you don't have one.
WARNING: It's entirely likely that this completely voids your warranty. Make sure you know what you're doing - you can brick your scope if you screw anything up.
Step 1: Spec Comparison
Step 2: Get Linux Running
Step 3: Change the language if necessary
Step 4: Find your firmware version
As you can see in the picture, I've got firmware 02.05.00.00 HardVersion 58. You can get all these details by going into the System Info dialog, pressing CH1 twice, then CH2 twice, then MATH once. Just be very careful once you do that sequence - apparently you can screw stuff up if you press anything other than RUN/STOP at this point.
Step 5: Prepare the software
This file contains a collection of different firmwares. At this point, for my original firmware, I needed the following parts:
The first one has a hex-edited version of firmware 02.02.SP2 that makes a 02.05 Rigol think it's an upgrade when it's really a downgrade. You need to downgrade to 02.02.SP2 to enable the modifications we're going to make. Refer to the forum post for more instructions if you have a different firmware than I have.
I simply put the first firmware on a USB key (02.02.SP2_patched_to_02.05.01.02) in the root. The key was formatted with FAT16. Then, I safely ejected the key, put it back in the computer, mounted it, and ran the following:
md5sum DS1000EUpdate.RGLI compared this to the .md5 file that was also in the directory from the zip file. They matched.
If they don't match, DO NOT CONTINUE. YOU WILL PROBABLY BRICK YOUR SCOPE.
Step 6: Load the 02.02 firmware onto the scope
- Put the key in the scope
- It will prompt you to update. Do it
- Once it's complete, it says "Updata successed,please restart", the best message ever.
- Push the power button on the top
- Unplug the USB key
- Push the power button again to turn it on. You should see the new version in the splash screen.
Step 7: Execute USB commands
I found this post really handy for this step. Hook up the USB cable to the back of the unit. Any generic USB cable will do - there's nothing special about it. I used one from my Arduino :). Once you have the device connected, make sure using dmesg:
[159486.820070] usb 4-2: new full speed USB device using ohci_hcd and address 11 [159487.214647] usbcore: registered new interface driver usbtmcIf you don't see that, try a different Linux (a newer kernel perhaps?) or check your connections a few times. I'm using Ubuntu 10.10, and it worked perfectly the first time. Now, we just need to get our commands straight. The first command sets the model number. You should probably leave this line as-is:
echo ":INFO:MODEL DS1102E" | sudo tee /dev/usbtmc0This second line is where you have some wiggle room. Apparently, the firmware cares what your serial number is, so you have to make it a valid DS1102E serial number. The following was taken from the cited blog post above, and he states it was found in an eBay auction. Your original serial number is on the back sticker on the case in case you ever want to change it back.
echo ":INFO:SERIAL DS1EB11305432" | sudo tee /dev/usbtmc0There. That's all you need to do with your computer. At this point, the scope had locked up on me, so I just unplugged it from the USB and rebooted it. Then, I went into the System Info and checked the model and serial numbers. See the picture.
Step 8: Flash an actual DS1102E firmware
Step 11: Update: Acquired my first images!
Step 12: Update: Testing (Not mine)
Here's an analysis using a sine wave of the analog bandwidth.
Rigol DS1102E 100MHz 1GS/SHere's it against a 200Mhz Tek and an unmodified unit. Notice how much the waveform looks like the Tek image?
Notes:Used 16X average. Real Time. Equivalent seems to extend bandwidth. I still have to research the difference between the two.
Rigol DS1052E 50MHz 1GS/S (This is the modded scope)
Notes:Used 16X average. Real Time. Equivalent seems to extend bandwidth.
Yes really slightly better then the real DS1102E I went back and forth several times.
Here's someone measuring a 109Mhz signal with a modified unit. Looks great!