This page is devoted to free software, products, and products-in-development at Oregon Research Electronics.
PowerConvert is a simple RF power calculator. Given a generator and a matched load, it lets you enter power in dbm, power in milliwatts, peak-peak voltage, or RMS voltage and determines the other three quantities. Once the initial matched power level is specified, you can vary the load or source impedance and see how the initial quantities vary. This calculator is free; click the link, above, for more information.
Have you ever struggled with the design of the "best" filter for a microprocessor PWM output? For some reason, there has been no readily accessible cookbook for the design of these important circuits. Help IS on the way. I am about 2/3 of the way through the writing of "The Little PWM Book". It will be posted here as soon as it is ready. And it will be free.
One of the key first steps for any transmitter or receiver is the design of a signal source. For the transmitter, the signal source is the exciter; for the receiver, it is the local osciallator or the test input signal. The RF Synthesizer does just that. It is frequency modulated and can operate between 50MHz and 500MHz. Cost is low and you have a lot of flexibility. Check the previous link for more information about the synthesizer characteristics and how you can get one.
The Universal Data Radio Project is the realization of a long-held desire to do some solid VHF/UHF transceiver design. It has grown out of the observation that modern RF design, especially above 30MHz, depends heavily on phase-locked loops (PLLs). Once you have a PLL, you are almost required to use some sort of microprocessor to set the frequency. And, once you have a micro, you can do all sorts of things with modulation and demodulation, like packet. Check the link for a LOT of details.Thanks for stopping by.
James Wagner, Chief Engineer, Oregon Research Electronics
Updated September, 2007