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Succesfully upgraded TDS620 to TDS640.
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Hello everybody,
I managed to upgrade my TDS620 to a TDS640 by changing resistors on the acquisition-board. I now have 4 channels active and this is working fine and the scope reports that it is a TDS640. The only thing which is bothering me is a message added in the error-log every time when I start the scope. Error: 242 wrong hardware configuration Acq number of digitizer probe, expect: 2, actual 4 This is not limiting the functionality but is just annoying. Does somebody have some advise how to get rid of this message? Regards, Wamor |
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Hi Wamor,
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Some years ago i started to fill a table with model's IDs. Maybe, is your case: the Processor board ID does not correspond to Acq configuration. See U3, U4 on Proc. board. This two are on: 00E0 0000 Register (read only) ID Register 1 00E0 0001 Register (read only) ID Register 2 Try this ID and send your to me, please: TDS640A 1 1 0 0 1 0 1 0 Regards, Peter Contact me offboard, if you need a part of schematics from TDS520 regarding this registers, because this board does not allow attachments чт, 20 мар. 2025?г. в 14:51, wamor2006 via groups.io <tektronix= [email protected]>: Hello everybody, |
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Hello Peter,
Thank you for your quick response!! I do have the schematics of the TDS520 so I can locate U3 and U4 and the corresponding resistors on my TDS620 (=>TDS640). I will open my scope tomorrow so I can send you the ID of my scope. The only thing what I see in the schematics is that only 3 pin's of U3 and U4 are connected with resistors. The other pin's are fixed to +5.1V or ground. This confuses me with the code you gave me (=>8 bits) I only could configure 3 pins of U3 and 3 pins of U4 with resistors (=> 6 bits). Do I have to split the ID between U3 and U4? Regards, Wamor |
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Hi Wamor,
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As far as I see the IDs on my boards, in my table, and your ID, the ID refers to something else. TDS520,TDS540,TDS620 use the same ID. Sorry to be encouraging. Maybe, H?kan is right. The only question is, where can we get the firmware from the TDS640? I'm doing similar research: how to convert TDS544A to TDS644A. The processor board is the same, the Acquisition board is different. The firmware of the TDS544A board does not see the Acquisition board from the TDS644A Regards, Peter пт, 21 мар. 2025?г. в 15:57, wamor2006 via groups.io <tektronix= [email protected]>: Hello Peter, |
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Hi Peter,
No problem, your are not encouraging me. This only gives me more energy to sort this out. Could you give me the ID to set with U3 for the TDS640 which you have in your table? And maybe also for the TDS620? I saw some pictures in the internet of the TDS640 CPU board and there the resistors connected to U3 are the same as on my TDS620 CPU board? When I look at the pictures I also see that the version numbers of the software are the same Another reason that H?kan is right. What I also see on my scope that the extra channels are identified on the screen as AUX1 and AUX2 and not CH3 and CH4 what I was expecting. Yes, your right. I need to find the firmware for the TDS640 then. I will post a new question on this group for that. Maybe I could remove the resistors connected to U3 and connect switches to check each configuration. Its only 7 new possibilities. I hope I don't destroy my scope when doing this. Or corrupt the NVRAM. I did the same with the acquisition board which worked really well. I am still busy creating a program in Labview to backup the NVRAM using the Prologix GPIB interface. Regards, Wamor |
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Wamor,
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If you see the service manual, there is an annotation: "Version ID resistor placement: place U4 & R12-R17 only on boards that have exceeded the ID number 11110XXX. In this case, the version number is decoded via pins 2,3,4 of U4. R7,R9,R11 are not placed & pins 5-9 of U3 are wired high" Regarding TDS640 ID, I sent the ID from TDS640A to you. I do not have them for TDS640, but I can see that TDS520,TDS540, and your TDS620 have the same IDs. Regarding AUX and Ch, Aux input has a simplified schematics than Channel on two channel boards. Maybe new firmware will fix the wrong names. And maybe some additional calibrations will be needed after the wrong hardware error will be fixed. Regarding NVRAM backup, See tektool program here: !-(firmware-flash-tools-for-old-tds-series)/ This one do not work on my PCII/IIA card, which i bought for Field Adjustment, but works on Prologix, as i know. WBR, Peter сб, 22 мар. 2025?г. в 18:27, wamor2006 via groups.io <tektronix= [email protected]>: Hi Peter, |
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