Scanning receiver with stored frequencies
First Claim
1. A receiver for tuning receivable frequencies, comprising:
- means for tuning said receiver in a first direction from a first frequency to a first limit;
means for resuming tuning to said first frequency from said first limit, and then for resuming tuning from said first frequency in a second direction, opposite said first direction, to a second limit;
means for resuming tuning from said second limit to said first frequency;
means for resuming tuning in said first direction from said first frequency to one of a third frequency and an upper tuning limit, if said upper tuning limit is tuned before said third frequency is tuned;
means for resuming tuning from said third frequency or said upper tuning limit to said second limit; and
means for resuming tuning in said second direction from said second limit to one of a fourth frequency and a lower tuning limit if said lower tuning limit is tuned before said fourth frequency is tuned.
1 Assignment
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Accused Products
Abstract
Receivable frequencies based on a predetermined instruction signal are scanned in a first direction and across a frequency range extending from a first start frequency to a first end frequency. The tuning is retraced to the first start frequency, and scanning is resumed in the opposite direction across a second frequency range extending from the first start frequency to a second end frequency. Next, tuning is retraced to the second start frequency and scanning is resumed in the first direction across a third frequency range extending from the first end frequency to a third end frequency. The scan operation is repeated until predetermined upper and lower frequency limits are reached. When one of the frequency limits are reached, scanning is performed for one or more frequency ranges in the opposite direction without retrace until the second frequency limit is reached.
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Citations
11 Claims
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1. A receiver for tuning receivable frequencies, comprising:
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means for tuning said receiver in a first direction from a first frequency to a first limit; means for resuming tuning to said first frequency from said first limit, and then for resuming tuning from said first frequency in a second direction, opposite said first direction, to a second limit; means for resuming tuning from said second limit to said first frequency; means for resuming tuning in said first direction from said first frequency to one of a third frequency and an upper tuning limit, if said upper tuning limit is tuned before said third frequency is tuned; means for resuming tuning from said third frequency or said upper tuning limit to said second limit; and means for resuming tuning in said second direction from said second limit to one of a fourth frequency and a lower tuning limit if said lower tuning limit is tuned before said fourth frequency is tuned. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification