Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
215 words
A radio broadcast system comprising a base broadcast transmitter/receiver and at least one module broadcast receiver/transmitter comprising: means for generating at the base transmitter/receiver a reference carrier in the form of sequential discrete envelopes thereof, each of duration of a predetermined period, and for transmitting the reference carrier to each module broadcast receiver/transmitter; means for generating at the base transmitter/receiver a base data word within the period of a respective envelope and for transmitting the base data word to the module receiver/transmitter within the period of the respective envelope; means in the module receiver/transmitter for receiving each reference carrier discrete envelope and in response thereto enable the module receiver/transmitter for operation with the base data word, for generating a corresponding module data word to be transmitted, for receiving the base data word, and for generating in response to reception of the base data word a timing period which is interposed between the received base data word and the module data word to be transmitted, and which is of length such that the corresponding module data word is also within the same envelope period as the received base data word; and means in the module transmitter/receiver for transmitting the module data word for reception by the base broadcast transmitter/receiver upon termination of the said timing period.
Claim 2
Dependent Claim
215 words
A radio broadcast system comprising a base broadcast transmitter/receiver and at least one module broadcast receiver/transmitter comprising: means for generating at the base transmitter/receiver a reference carrier in the form of sequential discrete envelopes thereof, each of duration of a predetermined period, and for transmitting the reference carrier to each module broadcast receiver/transmitter; means for generating at the base transmitter/receiver a base data word within the period of a respective envelope and for transmitting the base data word to the module receiver/transmitter within the period of the respective envelope; means in the module receiver/transmitter for receiving each reference carrier discrete envelope and in response thereto enable the module receiver/transmitter for operation with the base data word, for generating a corresponding module data word to be transmitted, for receiving the base data word, and for generating in response to reception of the base data word a timing period which is interposed between the received base data word and the module data word to be transmitted, and which is of length such that the corresponding module data word is also within the same envelope period as the received base data word; and means in the module transmitter/receiver for transmitting the module data word for reception by the base broadcast transmitter/receiver upon termination of the said timing period.
Claim 3
Dependent Claim
38 words
A system as claimed in claim 1, wherein the lengths of the base and module data words and the timing period are such that the transmitted module data word terminates with the termination of the respective envelope period.
Claim 4
Dependent Claim
22 words
A system as claimed in claim 1, wherein immediately successive sequential envelopes are transmitted spaced at predetermined minimum time periods between them.
Claim 5
Dependent Claim
65 words
A system as claimed in claim 1, wherein the reference carrier envelopes area transmitted from the base transmitter/receiver as a signal of a first reference frequency N, and the base and module transmitted data words are transmitted respectively from the base transmitter/receiver and the module receiver/transmitter separately as a signal of a second carrier of second frequency N/n derived from the first reference frequency N.
Claim 6
Dependent Claim
39 words
A system as claimed in claim 1, wherein the base transmitted data word comprises in succession data bits and check sum bits and the timing of the said period commences at the trailing edge of the final data bit.
Claim 7
Dependent Claim
24 words
A system as claimed in claim 5, wherein the base transmitted data word comprises in succession password bits, data bits and check sum bits.
Claim 8
Dependent Claim
22 words
A system as claimed in claim 1, wherein the module transmitted data word comprises in succession data bits and check sum bits.
Claim 9
Dependent Claim
35 words
A system as claimed in claim 1, wherein the base transmitted data word is transmitted at a first higher BAUD rate and the module transmitted data word is transmitted at a second slower BAUD rate.
Claim 10
Dependent Claim
41 words
A system as claimed in claim 1, wherein the reference carrier is at a first higher frequency and the base and module data words are transmitted on respective carriers at a second lower frequency which is derived from the first frequency.
Claim 11
Independent Claim
65 words
A system as claimed in claim I, wherein the reference carrier envelopes are transmitted from the base transmitter/receiver as a signal of a first reference frequency N, and the base and module transmitted data words are transmitted respectively from the base transmitter/receiver and the module receiver/transmitter separately as a signal of a second carrier of second frequency N/n derived from the first reference frequency N.
Claim 12
Dependent Claim
39 words
A system as claimed in claim 2, wherein the base transmitted data word comprises in succession data bits and check sum bits and the timing of the said period commences at the trailing edge of the final data bit.
Claim 13
Dependent Claim
24 words
A system as claimed in claim 11, wherein the base transmitted data word comprises in succession password bits, data bits and check sum bits.
Claim 14
Dependent Claim
34 words
A system as claimed in claim 2, wherein the base transmitted data word is transmitted at a first higher BAUD rate and the module transmitted word is transmitted at a second slower BAUD rate.
Claim 15
Dependent Claim
33 words
A system as claimed in claim 1, wherein the length of the timing period is sufficient for the system to perform required computation before transmission of the module data word embodying such computation.
Claim 16
Dependent Claim
33 words
A system as claimed in claim 2, wherein the length of the timing period is sufficient for the system to perform required computation before transmission of the module data word embodying such computation.