Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Phase-modulated carrier systems, i.e. using phase-shift keying

CPC: Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence)

Full titles differ between systems:

IPC:

Modulated-carrier systems > Phase-modulated carrier systems, i.e. using phase-shift keying

CPC:

Modulated-carrier systems > Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence)

Of 5 combined children, 3 exist in both systems.

2 codes are CPC-only extensions.

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H04L 27/183 CPC only CPC only
H04L 27/186 CPC only CPC only
H04L 27/20 Modulator circuits; Transmitter circuits +3 CPC IPC+CPC Available in IPC and CPC
H04L 27/22 Demodulator circuits; Receiver circuits +1 CPC IPC+CPC Available in IPC and CPC
H04L 27/24 Half-wave signalling systems IPC+CPC Available in IPC and CPC