Spectran is the follow-on of  Hamview, a program designed to do spectral analysis and real-time audio filtering on audio signals. Spectran has been developed to overcome the main restriction of Hamview, as explained in the  prerequisites  page.

Spectran does the following :
 

• gets an audio signal from the PC sound card 

 
• performs a windowed spectral analysis on the incoming signal

 
• displays the signal spectrum on the video screen using a carefully matched color scheme

 
• performs some enhancement on the signal using signal processing methods

 
• plays the filtered signal at the output of the sound card

 
• and last but not least, all these goodies are done in real time! (well, to be honest with about one second of delay from the input to the output,  due to the data windows used for signal analysis and processing).

The program was especially developed for radio amateurs interested into all those communication techniques where signals very close to (or more often below) the receiver noise floor are used, like EME, VLF, SETI and so on.

However we believe that Spectran will be of value also for HF and VHF CW lovers (try it... we never found a point-and-click CW filter on a commercial receiver!!!

The program was developed in an effort to improve the capabilities of amateur radio communications using the power of digital signal processing, and is continuously evolving.