I do not have the ability to recognize the pitch of the tone, so I need some assistance to zero beat a station I wish to call. The pitch of the received signal is initially set to be 600Hz by a remote command to my rig, ICOM IC-7410.
If I set a different pitch, say either to 500Hz or to 700Hz, it seems that the bandwidth of the audio signal is shifted accordingly. (Listening to a white noise on the frequency nobody is transmitting.)