using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Introduced: January 2015

Full Title

Full titles differ between systems:

IPC:

Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving > Circuits > using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

CPC:

Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission > Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving > Circuits > using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Of 3 combined children, 2 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 2015.

Child Classifications

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H04B 1/405 with multiple discrete channels since 2015 IPC+CPC Available in IPC and CPC
H04B 1/406 CPC only CPC only
H04B 1/408 the transmitter oscillator frequency being identical to the receiver local oscillator frequency since 2015 IPC+CPC Available in IPC and CPC