Author Topic: My Keysight 1000X Oscilloscope FAILED  (Read 6045 times)

0 Members and 1 Guest are viewing this topic.

Offline EEVblogTopic starter

  • Administrator
  • *****
  • Posts: 37662
  • Country: au
    • EEVblog
My Keysight 1000X Oscilloscope FAILED
« on: November 16, 2018, 01:11:12 am »
 :-BROKE

 

Offline FERCSA

  • Contributor
  • Posts: 39
  • Country: hu
    • www.fercsa.com
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #1 on: November 16, 2018, 01:24:51 am »
Dave, just connect your serial cable to the scope. You'll see more ;)
Don't ask. I'm the same guy who gave you ultra fast internet in the '00s..
#FERCSA
 

Offline scopeman

  • Frequent Contributor
  • **
  • Posts: 307
  • Country: us
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #2 on: November 16, 2018, 03:21:13 am »
I wonder if there is a bad relay or solder joint that is common. Perhaps the calibration source? Probably no hope of finding schematics.

I see a teardown and repair video in your future for this scope.

Sam
W3OHM
 

Offline EEVblogTopic starter

  • Administrator
  • *****
  • Posts: 37662
  • Country: au
    • EEVblog
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #3 on: November 16, 2018, 04:39:48 am »
 

Offline mikeselectricstuff

  • Super Contributor
  • ***
  • Posts: 13695
  • Country: gb
    • Mike's Electric Stuff
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #4 on: November 16, 2018, 08:42:36 am »
You didn't leave any of the hack links set did you ?
ISTR that offsets were one thing that made the apparent bandwidth increase hack not actually useful
 
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
Day Job: Mostly LEDs
 

Offline PA0PBZ

  • Super Contributor
  • ***
  • Posts: 5121
  • Country: nl
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #5 on: November 16, 2018, 10:08:17 am »
I don't think that the calibration signal is what it should be. It is all over the place, so no wonder the poor thing gives up.
Keyboard error: Press F1 to continue.
 

Offline TK

  • Super Contributor
  • ***
  • Posts: 1722
  • Country: us
  • I am a Systems Analyst who plays with Electronics
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #6 on: November 16, 2018, 12:32:44 pm »
The calibration traces do not look that bad, in scopes that are functioning they jump all over as well, it is part of the calibration algorithm.

Try removing the CPU/ASIC board, cleaning the contacts and re-installing it.
 

Offline JPortici

  • Super Contributor
  • ***
  • Posts: 3452
  • Country: it
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #7 on: November 16, 2018, 01:35:16 pm »
although when it moves around slowly it looks exactly like what happened to us on a batch of boards..
There was this issue where a PWM signal was filtered with a two pole Sallen Key and the guy who drew the schematic forgot to put the capacitor between the positive input of the opamp and ground on one channel.
It was ridiculous! the schematic was thight, if he had just copied the filter from another channel the infamous capacitor would have been on the title block, so he must have removed it never to add it back again :palm:

Anyway, the issue was that besides worse filtering of the signal there was a heavily distorted oscillation when the duty cycle changed between zero and about 20%, of the same kind i saw on the video. I would inspect the calibration signal circuit to see if there are cracked caps or something. every time i did self calibration i never saw a signal like that
 

Offline rsjsouza

  • Super Contributor
  • ***
  • Posts: 5980
  • Country: us
  • Eternally curious
    • Vbe - vídeo blog eletrônico
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #8 on: November 16, 2018, 07:45:36 pm »
That was a throwback. It reminded me of the well worn out analog oscilloscopes of the university labs, where the amplitude level switches made the GND level jump around like a crazy monkey! The potentiometers and tappings on the front panel caused all sorts of glitches on the waveform.  :-DD
Vbe - vídeo blog eletrônico http://videos.vbeletronico.com

Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 

Offline ginbot86

  • Contributor
  • Posts: 28
  • Country: ca
  • 0x9000
    • My tech blog documenting whatever weird electronic things I feel like doing.
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #9 on: November 17, 2018, 09:12:57 am »
I'm curious as to what the calibration logs have to say as to what went wrong. Using my Windows CE desktop hack (https://ripitapart.com/2018/10/15/gaining-access-to-the-windows-ce-desktop-and-doom-on-the-keysight-dsox1102g-oscilloscope/) I found that there are some .txt files (\Secure\cal\UserCal8Log.txt, \Secure\cal\callog.txt) and they provide some pretty verbose information as to the tests it performs, how long each test took, and so on.
Code: [Select]
Initialization Failed: Insufficient caffeine in system.
 

Offline FERCSA

  • Contributor
  • Posts: 39
  • Country: hu
    • www.fercsa.com
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #10 on: November 22, 2018, 12:31:59 pm »
A lot of good ideas here, but we have to really see the serial log under the calibration process to see what's going on. ginbot mentioned the UserCal8Log.txt It's a copy of the serial log and you can access it without opening your scope, but probably your scope is already open  :-DD
Don't ask. I'm the same guy who gave you ultra fast internet in the '00s..
#FERCSA
 

Offline apl99

  • Newbie
  • Posts: 1
  • Country: us
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #11 on: January 20, 2022, 06:05:15 pm »
Was the cause of the issue ever determined?
 

Offline EEVblogTopic starter

  • Administrator
  • *****
  • Posts: 37662
  • Country: au
    • EEVblog
Re: My Keysight 1000X Oscilloscope FAILED
« Reply #12 on: January 20, 2022, 09:22:32 pm »
Was the cause of the issue ever determined?

It was the hack:
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf