US3728623A
Expired / Lapsed
US
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Method and apparatus for spectrogram display control
Assignee: Scientific Atlanta LLC
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Filing: 1972-03-15
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Granted: 1973-04-17
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Expires: 1992-03-15
Abstract
Abstract A spectrogram display control unit that provides control of the displaying of frequency spectrum data in a composite X-Y display having multiple spectra data displayed in line by line arrangement, with the line spectra data being updated and refreshed serially. The spectra data is restored in a circulating memory shift register that receives updated information in timed sequence from another memory unit, which other memory unit provides time-controlled, interrogation of frequency data. The other memory unit can also average spectra data stored therein and supplied to the circulating memory unit at selected time intervals, that prevents loss of data between updating times.
Inventors
- 👤 C Dubois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:30
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A spectrogram display control for displaying frequency spectrum data produced by a wave analyzer comprising, first memory means for receiving and serially storing spectra data of the frequency spectrum data, second memory means for storing a series of spectra data received from said first memory means and recirculating the spectra data in said second memory means, means for shifting the spectra data from said first memory means to said second memory means updating the spectra data in said second memory means, and means for transferring the spectra data information in said second memory means to a composite display.
Claim 2
Dependent Claim
98 words
A spectrogram display control for displaying frequency spectrum data produced by a wave analyzer comprising, first memory means for receiving and serially storing spectra data of the frequency spectrum data, second memory means for storing a series of spectra data received from said first memory means and recirculating the spectra data in said second memory means, means for shifting the spectra data from said first memory means to said second memory means updating the spectra data in said second memory means, and means for transferring the spectra data information in said second memory means to a composite display.
Claim 3
Dependent Claim
98 words
In a spectrogram display control as claimed in claim 1 including, synchronizing means for synchronizing said shift means to shift the spectra data from said first memory means to said second memory means in synchronism with a given time sequence in the recirculating of the spectra data in said second memory means, and the spectra data being shifted out of said second memory means on a first-in, first-out basis and the spectra data received from said first memory means replacing the shifted out spectra data, updating a constant number of spectra data circulating in said second memory means.
Claim 4
Dependent Claim
52 words
In a spectrogram display control as claimed in claim 2 in which, said synchronizing means having means for providing clock signals that synchronize the recirculation of said second memory means, and said transfer means being responsive to said clock signals for displaying the recirculating spectra data in a given X-Y display format.
Claim 5
Dependent Claim
65 words
In a spectrogram display control as claimed in claim 3 including, control circuit means responsive to said clock signals for providing an output control signal to said synchronizing means that synchronizes the updating spectra data shifted from said first memory means to said second memory means to be a new line in the X-Y display having the same initial location at each updating time interval.
Claim 6
Dependent Claim
137 words
In a spectrogram display control as claimed in claim 4 in which, said synchronizing means including X axis means for providing X axis displacement signals to an X-Y display, Y axis means for providing Y axis displacement signals and Z axis means for providing intensity modulation to the X-Y display, and said X axis means and said Y axis means being responsive to said clock signals for providing an X-Y display control that is directly coordinated with the recirculation of the spectra data in said second memory means, whereby said spectra dAta is displayed in the X-Y display format in a line by line display having the updated information in the first line, which progresses to the last line, and is then removed from the display as the spectra data is removed from the second memory means.
Claim 7
Dependent Claim
29 words
In a spectrogram display control as claimed in claim 5 in which, said Z axis information being provided by the spectra data information circulating in said second memory means.
Claim 8
Dependent Claim
147 words
In a spectrogram display control as claimed in claim 3 in which, the X-Y display comprises a cathode ray tube display, said synchronizing means having X axis means for providing X axis step control signals and Y axis means for providing Y axis raster step control signals and Z axis means for providing data signals for intensity modulating the electron beam, said X axis means and Y axis means being controlled by said clock signals whereby the X axis control signals have a given number of steps for each step in the Y axis raster control signals, said second memory means recirculates said spectra data in synchronism with each step of the Y axis raster signals, and the Z axis data signals being responsive to the spectra data to vary the intensity of said electron beam in synchronism with each step of the X axis control signal.
Claim 9
Dependent Claim
55 words
In a spectrogram display control as claimed in claim 1 including, control circuit means for providing selective time control signals, and gate means responsive to the time control signals for feeding refreshing spectra data to said first memory means at time rates varying from the time rate of spectra data provided by the wave analyzer.
Claim 10
Dependent Claim
52 words
In a spectrogram display control as claimed in claim 8 including, second control circuit means responsive to said control circuit means for recirculating spectra data in said first memory means at a rate that may vary from the rate of gating spectra data into said first memory means by said gate means.
Claim 11
Dependent Claim
117 words
In a spectrogram display control as claimed in claim 9 including, adder means for receiving the spectra data and feeding the spectra data from said gate means to said first memory means, divider means for passing the spectra data from said first memory means to said second memory means, said first and second control means providing for recirculating data in said first memory means that adds with succeeding spectra data received through said gate means, and said divider means being set by said control means to divide the spectra data output of said first memory means providing an average of a given number of spectra data which spectra data average is shifted into said second memory means.
Claim 12
Independent Claim
113 words
The method of displaying frequency spectrum data produced by a wave analyzer in X-Y updated display form comprising the steps of, storing a spectra of frequency spectrum data in a first memory unit, shifting the spectra data from said first memory unit to second memory unit, storing a given number of spectra data in said second memory unit, recirculating said spectra data in said second memory unit, transferring said spectra data information to a composite display, and coordinating the shifting of the spectra data from said first memory unit to said second memory unit to update the recirculating spectra data in said second memory unit with one at a time received spectra data.
Claim 13
Independent Claim
113 words
The method of displaying frequency spectrum data produced by a wave analyzer in X-Y updated display form comprising the steps of, storing a spectra of frequency spectrum data in a first memory unit, shifting the spectra data from said first memory unit to second memory unit, storing a given number of spectra data in said second memory unit, recirculating said spectra data in said second memory unit, transferring said spectra data information to a composite display, and coordinating the shifting of the spectra data from said first memory unit to said second memory unit to update the recirculating spectra data in said second memory unit with one at a time received spectra data.
Claim 14
Dependent Claim
67 words
The method of displaying frequency spectrum data as claimed in claim 11 including the step of, synchronizing the transferring of the spectra data information to a composite display with the coordinated shifting of the spectra data from the first memory unit to the second memory unit to display the updated information in the composite display at a given initial point of the display in each occurrance thereof.
Claim 15
Dependent Claim
80 words
The method of displaying frequency spectrum data as claimed in claim 11 including the steps of, feeding the frequency spectrum data to the first memory unit at a rate of one spectra at a time, at selective intervals adding one spectra data to succeeding spectra data in said first memory unit, and dividing the summed spectra data by the number of spectra data added and transferring the averaged spectra data from the first memory unit to the second memory unit.
Claim 16
Dependent Claim
38 words
The method of displaying frequency spectrum data as claimed in claim 11 including the steps of, feeding the spectra data to the first memory unit at a rate different from the spectra data produced by the wave analyzer.
Claim 17
Dependent Claim
74 words
The method of displaying frequency spectrum data as claimed in claim 11 where the X-Y display is a cathode ray tube including the steps of, providing X axis signals in step voltage form and Y axis raster signals in step voltage form to provide the X-Y display, and coordinating the transferring of the spectra data to provide a given spectra data for each step of the Y axis thereby providing line by line display.
Claim 18
Dependent Claim
49 words
The method of display frequency spectrum data as claimed in claim 11 including the step of, synchronizing the recirculation of the spectra data in the second memory unit to provide the display of portions of the spectra data in synchronization with the step voltage of the X axis signals.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |