Talbot Andrew wrote:

Does Spectran use the same windowing function as Spectrogram ?
Depending on which window is used, the effective bandwidth of a spectrum
display can be from one to three FFT bins,  trading off display
sidelobes against effective bandwidth.

Spectran presently applies a Hamming window to the incoming data.
If you think it would be useful to use a rectangular one, perhaps
selectable with a push-button, it is an easy change to the program

Alberto,   I2PHD