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Oscilloscopes

Discussion in 'Electronic Equipment' started by Steven Frankel, Jul 23, 2003.

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  1. Hi all.
    I'm starting to learn electrical
    engineering (from "The Art of Electronics") and I want to get a
    'scope. I'm considering a Tektronix 465 or 475 from ebay. Is it worth
    considering? I want a scope that's as versatile as possible, but I don't
    want to spend a lot (at least not now). I'd be willing to spend up to about
    $400 if it's a good deal. Any suggestions? Should I just go with the Tek
    465/475?

    Thanks,
    Steve
     
  2. Ole Voss

    Ole Voss Guest

    Hi all.
    The book is quite fun, but you need some time to get used to the style ;-)
    As for the 475 - it's quite cool, but check if you really need the
    bandwidth. I'm putting mine up for auction soon (germany). They go for about
    EUR300. I opted for a lower bandwidth digital memory scope (20MHz) as my
    microcontrollers don't do much more then 10MHz anyway - and I'm really far
    more interested in actually seeing a static image.
    Needless to say the 20MHz el-cheapo was more expensive than the good old
    475.


    Regards,
    Ole.
     
  3. I suppose you're right. I probably don't need the bandwidth. I guess it's
    time to look for some 20-50 MHz scopes.
    BTW, are there any other books you'd recommend to learn from? (Perhaps
    something more up-to-date?)

    Steve
     
  4. Ole Voss

    Ole Voss Guest

    I suppose you're right. I probably don't need the bandwidth. I guess it's
    Hey, the subject is not really new either ;-) So go with what works. If you
    have time to spare just hop into the next bookstore and take a good long
    look at some books there. I don't get to read many english books on the
    topic (living in germany and all), but I do own a couple of them. Don't
    forget that the "Art of electronics" is a lecture script, and the author
    tends to shuffle some jokes between driving home points. That's ok, but
    sometimes irritating.
    I don't know what you have in mind, and I don't know your current level of
    expertise, but for me it has always worked to just get a handful of
    components and fry them. By the end of the day you're either missing an eye,
    leg or both but you'll certainly know WHY :)

    Wish you luck,

    Ole.
     
  5. Jim Yanik

    Jim Yanik Guest

    Both are good choices,also 2213/2215(60Mhz)'A', versions,2235/2236(100Mhz).

    465 is 100Mhz,475 is 200/250 Mhz depending on option.
     
  6. A E

    A E Guest

    Yes, they can also show spikes that aren't there due to improper probing
    technique... It's a double edge sword.
     
  7. Jim Yanik

    Jim Yanik Guest


    465/475 are better scopes,but of an older generation,replaced by the
    2445/65 series.(or the horrible 2335 series)

    The 2213/15 series were intended as low-cost,hi-volume production scopes.
    Simpler trigger circuits,they don't have the LF/HF reject filters,no BW
    limit switch for the vertical,but still good scopes. I have a 2213.
     
  8. matt

    matt Guest

    if anything, cable reflections are smaller in higher frequency probes. High
    frequency probes have better shielding and grounding than cheap low
    frequency probes. Capacitive loading (due to probe input capacitance) of the
    circuit you're testing is significant sometimes. Try to probe a 32kHz clock
    with anything else short of a 500MHz FET probe and you'll simply stop the
    oscillation with your probing .
    Testing is a very time consuming and labor intensive part of circuit design
    and garbage in is garbage out, so don't skimp on test equipment. Better buy
    a smaller chair or save money anywhere else first. Get the best scope you
    can afford even if it seems overkill for now.

    Best Regards,
    Matt Tudor , MSEE
    http://www.gigahertzelectronics.com
     
  9. matt

    matt Guest


    if you're ever going to study digital not only analogue circuits, which you
    probably will if you're studying electrical engineering, there are some
    other less obvious choices for the same money. HP (now Agilent) made some
    oscilloscope + logic analyzer combinations . I have a HP1631D , which is a 2
    channel DSO , with 50MHz single shot bandwidth , 200MSPS and 43 logic
    analyzer channels . You can get them with logic probes from Ebay for around
    or even significantly under your $400 budget .The scopes that were indicated
    in previous posts were more of production/portable troubleshooting for field
    technicians , with limited triggering .

    Matt Tudor , MSEE
    http://www.gigahertzelectronics.com
     
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