Author Topic: Tektronix 2465B 50 Ohm Overload  (Read 1537 times)

0 Members and 1 Guest are viewing this topic.

Offline Sublimis

  • Newbie
  • Posts: 4
  • Country: us
Tektronix 2465B 50 Ohm Overload
« on: October 22, 2016, 09:29:27 am »
I was curious if any one could give me some insight on trying to find the root cause of this error. I had my scope turned on no probes about 5 min the scope threw this error. Now when I put a probe on and put it on the probe cal on the scope, doesn't matter the channel and switch it to 50 ohm DC it throws the error after about 5 seconds. I have been talking to a person here and there and has been helpful in some ways but I'm new to this and not sure where to look for some of the items that he stated. He told me to look for cracks in the 50Ohm and thermistor are these in the attenuator? Totally new to this and I appreciate any help.
 :-BROKE
 

Online tggzzz

  • Super Contributor
  • ***
  • Posts: 10889
  • Country: gb
    • Having fun doing more, with less
Re: Tektronix 2465B 50 Ohm Overload
« Reply #1 on: October 22, 2016, 10:05:04 am »
This is a duplicate posting. https://www.eevblog.com/forum/repair/tektronix-2465b-50-ohm-overload-76215/

I suggest people reply to the other thread, so as to avoid wasting time and poorly duplicating effort.
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 17459
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Tektronix 2465B 50 Ohm Overload
« Reply #2 on: October 22, 2016, 10:32:04 am »
I was curious if any one could give me some insight on trying to find the root cause of this error. I had my scope turned on no probes about 5 min the scope threw this error. Now when I put a probe on and put it on the probe cal on the scope, doesn't matter the channel and switch it to 50 ohm DC it throws the error after about 5 seconds. I have been talking to a person here and there and has been helpful in some ways but I'm new to this and not sure where to look for some of the items that he stated. He told me to look for cracks in the 50Ohm and thermistor are these in the attenuator? Totally new to this and I appreciate any help.
 :-BROKE
It's appropriate to reply to this in the Beginners thread.
You're using it wrong.
50 \$\Omega\$ termination is NOT intended for use with a passive probe. Period.
Get the Operators manual off the net and have a study up.

Use the standard input impedance of 1 M \$\Omega\$ for all passive probe work.
Avid Rabid Hobbyist
 

Offline danadak

  • Super Contributor
  • ***
  • Posts: 1875
  • Country: us
  • Reactor Operator SSN-583, Retired EE
Re: Tektronix 2465B 50 Ohm Overload
« Reply #3 on: October 22, 2016, 08:12:00 pm »
Example probe for 50 ohm environment -

http://www.tek.com/datasheet/low-capacitance-probe/p6150

HP also had a series of probes for 50 ohm, with 100K Zin, passive.


Regards, Dana.
Love Cypress PSOC, ATTiny, Bit Slice, OpAmps, Oscilloscopes, and Analog Gurus like Pease, Miller, Widlar, Dobkin, obsessed with being an engineer
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf