Some interfaces contain external soundcards themselves, allowing extra flexibility in soundcard setup. These interfaces connect to the computer and key the transmitter whenever an audio tone is present. It might simply be an audio cable with a radio with VOX capabilities, or it might be a specialized external interface. Therefore some form of soundcard interface may be used. PSK31 software will output audio to the PC's soundcard to send a transmission, however a mechanism must exits for keying the radio to transmit an RF signal, as well as link the audio tone to the radio's audio input. Be sure to check our Software Reviews section to see some of the available packages. All PSK31 software has the basic ability to send and receive PSK31 signals. Software for PSK31 is abundant, so the choice of software packages depends largely on personal preference, as will as system requirements.
As a rule, a faster CPU and more memory are desired, however PSK31 will work on virtually any PC equipped with an internal or external soundcard. The only major requirement for the computer used to send and receive the PSK31 signals is that it contain a soundcard. Obviously, the better the transceiver and antenna, the better performance will be achieved, however PSK31 performance is often virtually the same on both low-end and high-end equipment. The same is true of the antenna, as PSk31 will function with a few watts and a wire antenna. A basic PSK31 station should consist of the following components:
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