Connect with us

How to buy probes for oscilloscope

Discussion in 'Electronic Equipment' started by alpha_uma, Aug 5, 2004.

Scroll to continue with content
  1. alpha_uma

    alpha_uma Guest

    Hi all. Sorry if these are dumb questions, but I'm a rookie when it comes to
    oscilloscope technologies. What should I be looking out for when buying
    probes for, say, a 100MHz 'scope? Is it recommended to buy used probes? Are
    probes rated according to max bandwidth? If I buy a probe which is good for,
    say, a 100MHz 'scope, would it work even better for a "slower" scope? Thanks
    Al-U
     
  2. Rich Webb

    Rich Webb Guest

    In general you'll get the best behavior with the scope's original
    probes. Next best is a probe that matches the manufacturer's specs.
    However, for the 100 MHz range you should get fine performance with any
    quality aftermarket probe that's rated for at least that bandwidth.
    Check the usual on-line sources.
     
  3. alpha_uma

    alpha_uma Guest

    Thanks for your reply. The reason I'm asking is that I'm looking to buy a
    used 'scope on Ebay, and many of them do not come with probes. And I'm also
    wondering if it is a better idea to buy a brand new probe than a used probe.
     
  4. mike

    mike Guest

    New probes are safer than used ones, especially if you're a newbie
    or if you're experienced but can't test it before you buy.
    New scopes are safer than used ones, especially if you're a newbie
    or if you're experienced and can't etest it before you buy.
    In most instances NEW is better than used in almost every respect except
    PRICE.

    For the older Tek scopes, the most expensive part is the manual.
    Second most expensive is the probe/accessories etc.
    Third most expensive part is the scope itself.
    That's why they rarely come with manuals or probes.

    When buying a probe:
    second most important consideration...does it work properly.
    There are some tiny brittle resistors soldered directly to the tip.
    When they break, it's all over. An intermittent probe you can't trust
    is not a good thing.
    third, does it have ground wire, gripper tips etc.
    first, does it's compensation range include the input C of your scope.
    fourth, does it have adequate bandwidth.

    Ebay ain't the best place to buy a scope. You never know what you're
    gettin'. I ran across an interesting situation where a major test
    equipment refurbisher was advertising stuff under an alias and claiming
    not to be able to test it. You know darn well they could test it and
    could fix anything fixable. Would have loved to know the history of that
    scope?? Didn't think to write down the address of the high bidder.
    I get all tuckered out just thinking about it.

    Ham radio swap meets sometimes have great deals, and if it's broke,
    it's cheap. Hint: "it's broke".
    mike

    --
    Return address is VALID.
    Wanted, 12.1" LCD for Gateway Solo 5300. Samsung LT121SU-121
    Bunch of stuff For Sale and Wanted at the link below.
    Compaq Aero floppy,ram,battery.
    FT-212RH 2-meter 45W transceiver. 2-meter linear
    Toshiba & Compaq LiIon Batteries, Test Equipment
    30pS pulser, Tektronix Concept Books, spot welding head...
    http://www.geocities.com/SiliconValley/Monitor/4710/
     

  5. FWIW, a company on Ebay is selling 100mhz probes new for less than $20.
    I got one and have been very happy with it when combined with my HP Scope.

    Mike
     
  6. alpha_uma

    alpha_uma Guest

    Can you supply a link to one of their items?
    Al-U
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-