Multiple frequency message system

A receiver means, capable of receiving coded message signals, including channel identification information assigned to each of a plurality of channels in a plurality of geographic areas and message information being transmitted in a predetermined sequence of coded transmission slots on each of a plurality of channels, each coded transmission slot of the predetermined sequence being transmitted sequentially on each of the plurality of channels so as to preclude the substantially simultaneous transmission of a correspondingly coded transmission slot on any two channels in a particular geographic area, said receiver means comprising:

• a receiver portion, capable of receiving the transmitted coded message signals during a predetermined one of the coded transmission slots being transmitted on each of the plurality of channels, said receiver portion having an output for detected channel identification information;
• memory means for storing predetermined channel identification information, and active channel information indicating the active channels of the plurality of channels capable of being received for at least one geographic area;
• channel selecting means being responsive to the active channel information for selecting the reception by said receiver portion of only the active channels in the particular geographical area when the channel identification information detected on the predetermined one of the plurality of channels does not match the predetermined channel identification information;
• and
• battery saver means being responsive to the active channel information for supplying power to said receiver portion during the predetermined coded transmission slots on the active channels being selected in the particular geographical area.