DIFF Subgroup
H03J 7/18 Automatic scanning over a band of frequencies
Introduced: January 1980
Full Title
Automatic frequency control; Automatic scanning over a band of frequencies > Automatic scanning over a band of frequencies
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 1980.
Child Classifications
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- H03J 7/20 where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element since 1980 IPC+CPC Available in IPC and CPC
- H03J 7/30 where the scanning is accomplished by mechanical means, e.g. by a motor since 1980 +1 CPC IPC+CPC Available in IPC and CPC
- H03J 7/32 with simultaneous display of received frequencies, e.g. panoramic receivers since 1980 IPC+CPC Available in IPC and CPC