Scanning receiver with manual override of frequency scanning routine
First Claim
1. A method of operating a frequency agile data receiver capable of operating over a wide frequency range, said receiver having stored therein a short list of local data channels, said method including a first mode of operation and a fast scan mode of operation,(a) said first mode of operation having awake and asleep phases, and comprising the steps of:
- a1) periodically awakening briefly from said asleep phase and listening for data signals on a first data channel;
a2) if no data signal is received on said first data channel, then checking among said stored short list of local data channels using a fast high energy utilizing first channel locating protocol to locate a data channel on which data can be received; and
a3) if no data channel is found on which data can be received, switching to a slow low energy utilizing second channel locating protocol and slowly scanning through said wide frequency range at a slow rate to find a data channel on which data can be received, andb) said fast scan mode of operation comprising the steps;
b1) providing a manually induced stimulus to said receiver which interrupts said first mode of operation; and
b2) initiates checking among said wide frequency range using a fast relatively high energy utilizing third channel locating protocol to locate a data channel on which data can be received, whereby in response to said manual stimulus said receiver is switched to said high energy utilizing third data channel locating protocol.
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Accused Products
Abstract
A frequency agile data receiver checks are needed, according to a first protocol, among a plurality of channels to find a channel carrying data. A control activated by the user interrupts this first protocol and institutes a second protocol different than the first. Applied to a paging receiver, the first protocol may sequentially tune the receiver to a plurality of previously identified channels to locate a channel on which paging data is satisfactorily received. The second protocol may sequentially tune to all possible channels to locate such a channel. By this arrangement, a person who knowingly moves to a new locality (e.g., flies to another city) can instruct the paging receiver to abandon a previously identified list of candidate channels and to begin a spectrum-wide scan to locate a new satisfactory paging channels.
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Citations
9 Claims
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1. A method of operating a frequency agile data receiver capable of operating over a wide frequency range, said receiver having stored therein a short list of local data channels, said method including a first mode of operation and a fast scan mode of operation,
(a) said first mode of operation having awake and asleep phases, and comprising the steps of: -
a1) periodically awakening briefly from said asleep phase and listening for data signals on a first data channel; a2) if no data signal is received on said first data channel, then checking among said stored short list of local data channels using a fast high energy utilizing first channel locating protocol to locate a data channel on which data can be received; and a3) if no data channel is found on which data can be received, switching to a slow low energy utilizing second channel locating protocol and slowly scanning through said wide frequency range at a slow rate to find a data channel on which data can be received, and b) said fast scan mode of operation comprising the steps; b1) providing a manually induced stimulus to said receiver which interrupts said first mode of operation; and b2) initiates checking among said wide frequency range using a fast relatively high energy utilizing third channel locating protocol to locate a data channel on which data can be received, whereby in response to said manual stimulus said receiver is switched to said high energy utilizing third data channel locating protocol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification