US4074358A — Test set for measuring jitter distortion of data …

Claim 1

Independent Claim 86 words

A test set for measuring distortion of incoming pulses comprising means responsive to the incoming pulses for constructing a standard pulse, means for generating digital representations of relative positions in time of the incoming pulses and the standard pulse, means for processing the digital representations of the relative time positions of each of a plurality of the incoming pulses and the standard pulse to obtain the quantity of distortion of the incoming pulse and means for compiling the number of times each distortion quantity is obtained.

Claim 2

Dependent Claim 86 words

A test set for measuring distortion of incoming pulses comprising means responsive to the incoming pulses for constructing a standard pulse, means for generating digital representations of relative positions in time of the incoming pulses and the standard pulse, means for processing the digital representations of the relative time positions of each of a plurality of the incoming pulses and the standard pulse to obtain the quantity of distortion of the incoming pulse and means for compiling the number of times each distortion quantity is obtained.

Claim 3

Dependent Claim 27 words

A test set, in accordance with claim 1, wherein the constructing means comprises a phase lock loop arranged to recover a median pulse from the incoming pulses.

Claim 4

Dependent Claim 52 words

A test set, in accordance with claim 1, wherein the means for generating digital representations includes means responsive to the constructing means for determining an interval separating the standard pulse and a point in time and means for measuring an interval separating each of the incoming pulses and the point in time.

Claim 5

Dependent Claim 43 words

A test set, in accordance with claim 1, wherein the constructing means includes means for defining at least one edge of the standard pulse and means responsive to the corresponding edges of the incoming pulses for modifying the phase of the defined edge.

Claim 6

Dependent Claim 57 words

A test set, in accordance with claim 4, wherein the means for generating digital representations includes means responsive to the constructing means for determining an interval separating a point in time and the modified defined edge and means for measuring an interval separating the point in time and each of the corresponding edges of the incoming pulses.

Claim 7

Dependent Claim 64 words

A test set, in accordance with claim 5, wherein the means for generating digital representations further includes first means for generating a digital representation of the interval separating the point in time and the modified defined edge and second means for generating a digital representation of the measured interval between the point in time and each of the corresponding edges of the incoming pulses.

Claim 8

Dependent Claim 37 words

A test set, in accordance with claim 6, wherein the processing means includes means for calculating differences between the digital representation generated by the first generating means and the digital representations generated by the second generating means.

Claim 9

Dependent Claim 23 words

A test set, in accordance with claim 7, and further including means for displaying representations derived from selected ones of the calculated differences.

Claim 10

Dependent Claim 26 words

A test set, in accordance with claim 7, wherein the compiling means includes means for counting number of times individual ones of the differences are calculated.

Claim 11

Dependent Claim 27 words

A test set, in accordance with claim 9, wherein the displaying means includes means responsive to the calculated difference counts for selecting ones of the individual differences.

Claim 12

Independent Claim 154 words

A method of measuring jitter distortion of a train of data pulses comprising the steps of: constructing a median leading and a median trailing edge and a point of time reference at the midpoint thereof from the leading and trailing edges of the data pulses; generating a first digital representation of the interval between the leading edge of each data pulse and the point of time reference, a second digital representation of the interval between the leading edge of each pulse and the trailing edge thereof and a third digital representation of one-half the interval between the median leading edge and the median trailing edge; calculating the difference between each of the first digital representations and the third digital representation and the difference between each of the second digital representations and the sum of the corresponding first digital representations and the third digital representation; and displaying the results of selected ones of the calculations.

Claim 13

Independent Claim 154 words

A method of measuring jitter distortion of a train of data pulses comprising the steps of: constructing a median leading and a median trailing edge and a point of time reference at the midpoint thereof from the leading and trailing edges of the data pulses; generating a first digital representation of the interval between the leading edge of each data pulse and the point of time reference, a second digital representation of the interval between the leading edge of each pulse and the trailing edge thereof and a third digital representation of one-half the interval between the median leading edge and the median trailing edge; calculating the difference between each of the first digital representations and the third digital representation and the difference between each of the second digital representations and the sum of the corresponding first digital representations and the third digital representation; and displaying the results of selected ones of the calculations.

Claim 14

Independent Claim 110 words

A method of measuring jitter distortion of a train of data pulses comprising the steps of: recovering a standard leading edge and a standard trailing edge from leading and trailing edges of the data pulses; generating digital representations of relative positions in time of each leading edge and each trailing edge of each data pulse and the standard leading edge and the standard trailing edge; obtaining a distortion quantity of each data pulse from the digital representations of the relative positions of the leading edges and trailing edges of the data pulses and the standard leading and trailing edges; and compiling the number of times individual distortion quantities are obtained.

Claim 15

Independent Claim 110 words

A method of measuring jitter distortion of a train of data pulses comprising the steps of: recovering a standard leading edge and a standard trailing edge from leading and trailing edges of the data pulses; generating digital representations of relative positions in time of each leading edge and each trailing edge of each data pulse and the standard leading edge and the standard trailing edge; obtaining a distortion quantity of each data pulse from the digital representations of the relative positions of the leading edges and trailing edges of the data pulses and the standard leading and trailing edges; and compiling the number of times individual distortion quantities are obtained.

Claim 16

Dependent Claim 77 words

A method of measuring jitter distortion, in accordance with claim 12, wherein the steps of generating digital representations includes the steps of: defining a point of time reference at a midpoint between the standard leading and trailing edges; generating a first digital representation of an interval between the reference time and one of the standard edges; and generating second digital representations of intervals between the reference time and corresponding one of the edges of the data pulses.

Claim 17

Dependent Claim 42 words

A method of measuring jitter distortion, in accordance with claim 13, wherein the step of obtaining the distortion quantity of each data pulse includes the step of: calculating a difference between the first digital representation and each of the second digital representations.

Claim 18

Dependent Claim 50 words

A method of measuring jitter distortion, in accordance with claim 14, wherein the step of compiling includes the steps of counting the number of times individual ones of the differences are calculated and displaying representations derived from selected ones of the individual differences in accordance with the several counts thereof.

Claim 19

Independent Claim 91 words

A method of measuring jitter distortion of a train of data pulses comprising the steps of: recovering a standard pulse from the train of data pulses; calculating quantities that the data pulses lead and lag the standard pulse; compiling the number of times individual lead and lag quantities are calculated; cumulatively summing the compiled number of a largest quantity with the compiled numbers of next successive smaller quantities until a predetermined number is exceeded; and displaying a digital representation derived from the quantity being summed when the predetermined number is exceeded.

Claim 20

Independent Claim 91 words

A method of measuring jitter distortion of a train of data pulses comprising the steps of: recovering a standard pulse from the train of data pulses; calculating quantities that the data pulses lead and lag the standard pulse; compiling the number of times individual lead and lag quantities are calculated; cumulatively summing the compiled number of a largest quantity with the compiled numbers of next successive smaller quantities until a predetermined number is exceeded; and displaying a digital representation derived from the quantity being summed when the predetermined number is exceeded.

Claim 21

Dependent Claim 94 words

A method of measuring jitter distortion in accordance with claim 16 wherein the step of cumulatively summing includes the steps of: cumulatively summing the compiled number of a largest lead quantity with the compiled numbers of next successive smaller lead quantities until the predetermined number is exceeded; and cumulatively summing the compiled number of a largest lag quantity with the compiled numbers of next successive smaller lag quantities until the predetermined number is exceeded; and the step of displaying includes combining the lead and lag quantities being summed when the predetermined number is exceeded.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1981-02-13	1981-08-15	1982-02-14	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1985-02-13	1985-08-15	1986-02-14	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1989-02-13	1989-08-15	1990-02-14	$7700.00	Window Closed / Lapsed

Test set for measuring jitter distortion of data pulses

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