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

Introduced: September 1968

Title

Titles differ between systems:

IPC: Frequency-modulated carrier systems, i.e. using frequency-shift keying

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

Full titles differ between systems:

IPC:

Modulated-carrier systems > Frequency-modulated carrier systems, i.e. using frequency-shift keying

CPC:

Modulated-carrier systems > Frequency-modulated carrier systems, i.e. using frequency-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 27/103 CPC only CPC only
H04L 27/106 CPC only CPC only
H04L 27/12 Modulator circuits; Transmitter circuits +3 CPC IPC+CPC Available in IPC and CPC
H04L 27/14 Demodulator circuits; Receiver circuits +1 CPC IPC+CPC Available in IPC and CPC
H04L 27/16 Frequency regulation arrangements IPC+CPC Available in IPC and CPC