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I have generated Pseudo Noise using a PIC 12c672 .Basically is having arrays . You can tap the array and exor it with a value. The sequence will repeat atfer some time, but looking it into an spectrum analizer it was enough for my purposes (apply this noise to a laser) .
Re: Simple FM reciever
Here some usefull projects you can build
h**p://www.oldradioworld.de/gollum/sloped.htm
h**p://www.zen22142.zen.co.uk/Circuits/rf/fmreceiver.htm
VCO measurement problem
VCO are sensitive to test probes. Usually when you use an oscilloscope probe or even coaxial , the VCO unlocks . If you are using an spectrum analyzer, the best way is use a FET probe too. This comercial probe is attached to the spectrum . Valid measurements can be...
Re: Phase Noise
Other noise source is the reference oscilator. Add a series 3 to pole Band PAss filter to your reference .
VCO noise ( if using comercial VCO) is inherent and not much can be done.
To get the lowest noise, usually the shunt capacitor( cap to ground) in the loop filter has...
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