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69820Re: Ensemble RXTX Divider

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  • pauldebono@rocketmail.com
    Nov 7, 2012
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      Alan,

      Thanks. You put my mind back on track !!

      I would have tought so.
      By probes, you mean similar to those of the scope, or RF probe, with a diode ?

      Paul


      --- In softrock40@yahoogroups.com, "Alan" <alan4alan@...> wrote:
      >
      >
      > ----- Original Message -----
      > Subject: [softrock40] Ensemble RXTX Divider
      >
      >
      > >
      > > But, when inserting the USB cord, thus powering the SI570, the 74AC74 is dividing by four-ok, checked with frequency counter, but
      > > on pin 3 & 11 , my test meter keeps bleeping continuously, showing a continuity sign and 1.6 volts !!
      > >
      > > Is this flying RF ?
      > > The problem is the test meter's ?
      > > Bad testing procedure ?
      >
      > Paul,
      >
      > Really that's it. Bad testing procedure:)
      >
      > But it's not your fault, just that your meter is affected by the square wave signal on those pins.
      > Most meters do give the results Robby shows but some do not.
      > It is not really the correct way to test.
      > Ideally an integrating probe is required but I suggest you just ignore it.
      > It does confirm that a switching signal is present.
      >
      > 73 Alan G4ZFQ
      >
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