bipolarjunction
Maybe I found out how to re-do SPC for a new ACQ board. There is a need to execute this command(calConStatus = cc_init(1)), which will completely erase the SPC calibration data of your previous ACQ board, and then rewrite the original factory CAL data when re-executing After SPC, all user CAL data in the directory c:\vxBoot\CalCons will be regenerated, but it is recommended that you back up all the files under c:\vxBoot\CalCons before running this command.
-> calConStatus = cc_init(2)
0x167bce0 (tShell): Reading 358 bytes of service cal #1 data from NV[3:0] into 0x164d7e0
0x167bce0 (tShell): nvMem_read succeeded
0x167bce0 (tShell): Optical hardware is not present.
calConStatus = 0x127d1dc: value = 0 = 0x0
-> calConStatus = cc_init(1)
0x167bce0 (tShell): Erasing sector 3 of the M25P20 FLASH
0x167bce0 (tShell): Storing 358 bytes of service cal #1 data from 0x1ffe500 into NV[3:0]
0x167bce0 (tShell): NV service cal data verified.
0x167bce0 (tShell): Optical hardware is not present.
calConStatus = 0x127d1dc: value = 131071 = 0x1ffff
I have done this on my TDS7254B, but unfortunately the problem of SPC fail still exists. This also proves that my problem is not caused by SPC software or data storage, but due to hardware failure, so I am focusing now. U1021 MAX9601(Ultra-High-Speed Comparators), I measured all the power-on voltage data of the U1021 high-speed comparator and the ground resistance of the power-off as attach picture. The very obvious problem is that the U1021 Pin9 & Pin10 does not have any voltage input, and in the case of turning off the power. PIN12 is directly shorted to ground (measured impedance is 0 ohms). Another very doubtful situation is that the U1021 chip has a relatively large amount of heat and the surface is a bit hot. I am considering replacing this chip, but I need to be clearer before replacing it. Whether this chip is really damaged, Would you please help to measure the voltage data of Pin9 Pin10 Pin11 Pin12 of your ACQ board U1021 and the ground resistance data of the power-off, which will help me to judge this more clearly, whether the chip is good or not,Thanks
B&R
Snoopy