IPC Subgroup
H04K 1/04 by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
Introduced: September 1968
Last revised: January 2006
Full Title
Secret communication > by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- SECRET COMMUNICATION; JAMMING OF COMMUNICATION
Related Keywords
systems for SCRAMBLING signals