![]() Set the receive mode to NFM, filter bandwidth to 12500 Hz, filter order to 10, turn squelch OFF and filter audio OFF.Īdjust the RF gain settings under the configure menu until good reception is achieved. You can use either windows stereo mix, VB-cable (free) or Virtual Audio Cable (paid with trial version). You will also need to have an audio piping method installed and set up.Īudio piping will allow the audio from SDRSharp to be passed to a decoding program. If you do not, visit the Buy RTL-SDR page, and then the Quickstart guide. They also have a distinctive sound when played with NFM mode. Pagers normally use either the POCSAG or FLEX protocols, and the signals will look on a waterfall something like the signal shown below. Usually they will be anywhere from 137 - 160 MHz, around 450 MHz, or around 900 MHz.Ĭheck or Google for frequencies in your area, or just search for them manually - they are usually quite easy to spot. Please research and respect your local laws before attempting this project. ![]() In some countries it may be illegal to even set up a receiver. This is a concern as it is a major breach of patient privacy. If you dont know what a pager is, since they are now uncommon, here is a brief explanation from Wikipedia.
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