| Products > Test Equipment |
| Upgrading the Hantek DSO4072C and DS4104C oscilloscopes bandwidth up to 250MHz |
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| Microcheap:
So, I got one of these cheap 4072C to play and then decided to see if it was possible to hack it from its original 70MHz to the 200MHz maximum bandwidth. I successfully managed to re-config it and found that it is rather simple, it is very similar to the other Hantek hacks with just a small different detail. Here is how I did it, if anyone is interested: 1 - You need to open the case to get access to the serial interface on the PCB, it is located beside the usb connector and the pinout is the same as the others, from the usb connector the pins are: unused, RX, TX , GND and 3v3 (not needed). 2 - Connect the cables to an USB-TTL converter and on your pc open the terminal emulator of your choice (I use Poderosa 4). Open a serial connection with the configuration 115200bps and 8-n-1. 3 - Turn on the oscilloscope and wait for the boot. Before change anything I did a full backup using the tool nandbackup_V2 provided by @fremen67 here (just extract the files to an usb flash drive, plug it to the scope and execute the script, i did ./nandbackup_1.00.2_OOB and ./nandbackup_1.00.2 just in case, it will take about 15min each). 4 - Now, to change the bandwidth you need edit just one line in the file i2c.log located in / (I would recommend you to make a copy of it to your flash drive as well). Open the file with the vi editor and change the last line: where you see [bw] 70 to [bw] 200 to get the 200MHz or [bw] 100 to 100MHz. Save and close. 5 - Now reboot the scope typing the command reboot [enter] (if you just turn off and on the scope, it won't work), and that's it Opening the menu Utility -> System Info you should see the model changed to DSO4202C. To be honest, I am not sure if there is really any difference among the models. I don't have a function generator or other equipment capable of test the full bandwidth, my hacked HDG2002B is useful up to just about 50/60 MHz so I couldn't see any practical change after the upgrade, if anyone could test it and confirm, I would be grateful. Some pictures |
| Microcheap:
Some other pictures |
| Microcheap:
I understand that there is not much interest in these cheap Chinese equipment manufacturers, so I will keep the information in one thread only to not pollute the forum, just in case someone ever looks for it, they will be able to find it here. So, I borrowed the newer model of the Hantek scope with 4 channels (DSO4104C) to try the same upgrade as above and indeed it works. The 2ch model goes up to 200MHz only but the new 4ch has a 250MHz version: http://www.hantek.com/en/ProductDetail_3_12167.html The procedure is the same as described in the first post, the only difference is in the file to be changed. To get the full 250MHz bandwidth, edit the file system.inf located in /config/root and change the first line "Model=80M$DSO4084C" if you have the 80MHz or "Model=100M$DSO4104C" for the 100MHz to Model=250M$DSO4254C, save and reboot. If someone is able to test and confirm it would be nice, as I don't have the equipment to test the effectiveness of this upgrade or the real performance of these oscilloscopes measuring maximum bandwidth. |
| Microcheap:
Some more pictures |
| rlohmann:
Just a small question, could you provide a closer photo from the wave gen output? ;) I'm wondering which IC is placed at U63 (and if possible the diode D1501). ;D I'm curious if simply adding a IC, diode and BNC would enable the wave gen on DSO4004B ... (the according GUI is already available in my case) |
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