Products > Test Equipment
HP/Agilent 1675x logic analyzer card memory up-hack
Hamster:
Removal of the Resister on a 16716A does indeed pass a 16717A self test.
Removal of the Resister on a 16750A does indeed pass a 16752A self test.
Now, just need to look to fix these 3 errors:
Analyzer Chip Memory Bus Test
System Clocks ( Master/Slave/Psync)
Analyzer Memory Bus SU/H
I have 4 751A all reporting same error, however, they all have had trace damages in different areas that have been fixed, but they all come back to the same 3 errors .. |O
MarkL:
--- Quote from: Hamster on April 02, 2021, 09:29:40 pm ---Removal of the Resister on a 16716A does indeed pass a 16717A self test.
Removal of the Resister on a 16750A does indeed pass a 16752A self test.
--- End quote ---
Thanks for the confirmation.
--- Quote ---Now, just need to look to fix these 3 errors:
Analyzer Chip Memory Bus Test
System Clocks ( Master/Slave/Psync)
Analyzer Memory Bus SU/H
I have 4 751A all reporting same error, however, they all have had trace damages in different areas that have been fixed, but they all come back to the same 3 errors .. |O
--- End quote ---
Have you looked at the detailed debug output from "pv"?
Maybe start another thread to dive into it, or continue in the "167xx series defect" thread:
https://www.eevblog.com/forum/repair/series-defect-on-agilent-167xx-boards/msg3536318/#msg3536318
Hamster:
16911A "Memory upgrade"
The Serial Eeprom on the underside of the board is for the Altere FPGA
The Unknown Part 16V08 ( Looks like a CPLD ) masquaring as a EEPROM appears to contain config data.
I have a 16911A w/PSYNC clock failure, if i can't figure it out, i may try to power up the board and try to figure out how to read the EEPROM data from the Header Pins.
danielbriggs:
I'm currently half way through working out how to "liberate" the 16910's (and assumed 11's).
I was going to do a post on here about it once it was complete.
But for now:
I have 2x 16910A's. One which is licenced to 16MB Memory and 500M state, and another one that's a bit ill I'm repairing which is licenced to 256k and 250M state.
I too thought it was the big EEPROM labelled "CONFIG EEPROM" U102 PN: XC18V04
So I ordered a Xilinx USB programmer and tried to read the config EEPROMs. They are not protected, and you can freely read back the images.
I've done this for both of my 16910's and the images are IDENTICAL. :)
I extended the backplane via some chunky header cables and means I run the board up outside the chassis + peek around while a card is live. (Keep some form of external cooling on as the cards take quite a bit of power!)
It turns out the actual licence data is held in a tiny Microwire / SPI type 2kb flash on the underside of the board.
(M93C56)
According to some documentation I found from Agilent, this 2kb EEPROM stores "serial number, calibration factors and memory depth enabled".
I'm waiting on a few more parts to arrive, and will carry on the work + update you all with my findings as I go.
What memory depth + 250/500 licence are all of your 16910/11's?
All the best,
Dan
Hamster:
I have 250Mhz/4M 911a's and 2 250Mhz/256K 911a's
which spi flash has the config? i assumed U90 was for the fpga config for Xilinix on the otherside of the board.
i think if we can figure out the SIGN code in the license data, we could just generate the upgraded license files... I have 3 911A(s) i would love to upgrade to max Memory Depth. i have a 4th, but has a PSync Clock failure, which i can't seem to locate the fault.
I also have had this mod done on 2 of my 911A(s) ) basically each board has this done 4 times , and 2 that do not have this mod done ( see attached )
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