Re: Measuring how dirty the power is

Voltage has remained stable. I have also attempted to place a 10ohm
resistor in series with the supply along with a 10uf compacitor from VSS to
ground to try to clean it up but that didnt work either. In the data ***
it says I need to keep the noise and "hash" below 20mV for which I was
trying to see how I could see the 20mV without a scope.

I am using a 12volt DC power supply which hits a voltage regulator to knock
the voltage down to 5V for the module. I have tested this with no other
components other that the transmitter/recv'er and also by using the above
reference to try to clean it up all w/out success. Voltage stays consistant
from power up and during transmit. Can you think of anything else?


"Dan H" <dan.hollands@xxxxxxxxx> wrote in message
news:1140801056.259956.54730@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Bryan Martin wrote:
I have a RF device I am trying to build which is failing to run when
running
off wall wart power. It will run if I change the power to battery so I
feel
like its due to dirty power. How would I go about testing this with a
meter?

--
Poor planning on your part does not constitute an emergency on my part.

Other than measuring the voltage and seeing if it varies when you try
to run you device there is not much you can do with a meter. The most
likely cause is that the PS is not capable of supplying the current
required. It is unlikely that the power is "dirty". To see "dirty"
power you would need an oscilloscope.

Dan H



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