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Circuitmaker - Frequency Counter

Discussion in 'Electronic Design' started by Alt Beer, Jun 17, 2005.

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  1. Alt Beer

    Alt Beer Guest

    Is there an easy way to measure the frequency of an oscillator simulation in
    Circuitmaker 2000 ?

  2. Yes. Probably a similar method to that used in other simulators.
    Display the Measurement Cursors, position two over a cycle of
    oscillation, and read the result. Did you try reading the Help? Here's
    a detailed extract:

    "If both cursors are enabled, Cursor 2 - Cursor 1 values (x and y
    cursor deltas) can be displayed. If both the cursors are assigned to
    the same waveform, then the Minimum or Maximum y value between the
    cursors is displayed. Other options for a single waveform include
    Average, RMS and Frequency. Average and RMS values are based on the
    average of the data between the cursors, so for an accurate
    measurement, it is important to measure complete cycles or a large
    number of cycles. Also, be sure that the waveform you are measuring
    has stabilized between the cursors (i.e., it is not drifting toward or
    away from some DC offset.) See Figures 6.8 and 6.9 in the user manual.
    Frequency is measured by placing the cursors exactly one cycle apart
    (Frequency = 1/period.)"
  3. Alt Beer

    Alt Beer Guest

    Thanks a lot. I tried looking in Instruments and also searching help for
    frequency and measurement and right clicking on the output waveform
    display... cursors will do the trick.
  4. nah...SuperSpice is much better for this sort of thing.
    I'll pop in my usual 10 cents marketing worth:)

    This is such a useful feature that in SS there is direct GUI support for
    this. You use the transient set-up dialog to select a signal, and a stop
    and start zero x-ing count, and after each run it will display the
    frequency in the message bar at the bottom of the main frame. It also
    does this for rise/fall times, delay from a a reference etc, as well as
    for rms, rms ripple, averages of a waveform etc. So, you don't need to
    fiddle with cursors at all. Once its set up, each run will display new
    measurements with no intervention by the user. There are some examples
    that demonstrate these features.

    AnalogJKDTest.sss - automatic tr, tf, period, width, delay, measurements
    (Signal Analysis setup)

    ColpitsOsc.sss - automatic frequency measurement (Transisent setup)

    DCToACPS.sss - automatic rms, rms ripple, average, pk-pk measurements
    (Signal Analysis setup)

    Kevin Aylward
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.
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