Tone Decode

This mode decodes several types of tones which are commonly heard on the VHF/UHF bands.


 

These buttons select which type of tone to decode:

DTMF (“Touch Tone” which is probably a trademark of the telephone company)
EIA 
CCIR
XPH tones

The decoded digits are displayed in the text window. 

(XPH is a spy numbers station that sends messages via tones, rather than voice or morse code. It is believed to be operated by a Russian intelligence organization)