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B&k 3010 function generator

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  • B&k 3010 function generator

    The sine, square, & triangle waves produced by my unit are not a steady frequency. Viewed on the o-scope they have a slight compression/expansion effect and prevents me from making the adjustments shown in the manual.
    Anybody care to offer a possible solution?

    3010_manual.pdf

  • #2
    Can you hear this? Any chance it is a triggering issue on the scope?

    Are all the power supplies CLEAN, and up to voltage?

    The manual is nice, but there is no schematic in it that I see.
    Education is what you're left with after you have forgotten what you have learned.

    Comment


    • #3
      Yes I can hear it pulsing, and only at a certain freq position does it clean up at all.
      I measured the voltage supply's to the LM324 chips.
      1 measures +24v, and - 5v, the other is -20v and +5v
      I suppose therein lies the problem, as they should be similar and more less equal I think.
      I'll try tracing the circuit back to see if I can find what's wrong.
      Be great to have a schematic but I've had no luck finding one.

      Comment


      • #4
        See if that -20v line has excess ripple on it. You might have a beat frequency happening between signal and ripple.

        Did you google B&K 3010? I just did, and first hit at the top was the Boat Anchor Archive, which included your schematic.

        http://bama.edebris.com/download/b&k...schematics.pdf
        Education is what you're left with after you have forgotten what you have learned.

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        • #5
          Thank you! Indeed that was the problem and after changing the cap, was able to make the calibration. All good
          Thanks again!

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          • #6
            Almost like I had super powers...
            Education is what you're left with after you have forgotten what you have learned.

            Comment


            • #7
              Doesn't seem too far-fetched. Clearly you can already fly, with much grace and elan.
              "Everything is better with a tube. I have a customer with an all-tube pacemaker. His heartbeat is steady, reassuring and dependable, not like a modern heartbeat. And if it goes wrong he can fix it himself. You can't do that with SMD." - Mick Bailey

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              • #8
                Have you seen Grace lately?

                Click image for larger version

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                Education is what you're left with after you have forgotten what you have learned.

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