Wamor,
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,
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
