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Recommendations for a TEK 465b probe

Discussion in 'Electronic Basics' started by spammersarevermin, Jan 12, 2006.

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  1. For normal PIC testing... Also, can you recommend online sites for
    buying? Thanks
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  2. Guest

    Any x10 probe will do, have a look on ebay. The real question is does
    your 465 meet the bill. If your doing program developement, sometime
    soon you will need more that 2 channels and storage of some sort.
  3. Bob Monsen

    Bob Monsen Guest

    Some tips:

    When trying to figure out whether a waveform makes sense, you are going
    to want to trigger right before the waveform begins. Reserve a port pin as
    your 'trigger' pin, and wiggle it right before the event you want to
    monitor in your main loop. Then, view the waveform using the other channel.

    I have a 475. There are special probes that you can get, which will do
    the 10x multiplication just by plugging the probe in. (I have a
    P6106A, that I got on EBAY.) Other probes (from probemaster!) have a
    switch that you can use to switch between 1x and 10x.

    For PIC work, a 20MHz probe is probably all that you need. They are
    also fairly cheap, and you need two if you are going to do the trigger
    trick above.

    Remember that the ground of the oscilloscope is not floating. So, don't
    try to connect the ground up to anything that is not isolated, or you'll
    end up passing too much current through the probe, and could even create a
    dangerous situation. You can get isolation transformers if you really need
    to do this (for example, if you are working on a non-isolated power supply
    or something like that). You can also float the scope itself by disabling
    the third prong, but that is NOT recommended, for various obvious reasons.

    Have fun. A scope makes it possible to visualize all of this cool stuff.
    As a software guy, I spent far too much of my career thinking hardware was
    just funny data structures... I'm having way more fun these days.

    Bob Monsen

    "Ignorance more frequently begets confidence than does knowledge: it
    is those who know little, and not those who know much, who so
    positively assert that this or that problem will never be solved by
    -- Charles Darwin
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