Method and apparatus for bit error rate test
First Claim
Patent Images
1. A method, comprising:
- programming a sequencer circuit to recognize at least one predefined invalid bit pattern;
storing an expected bit pattern;
receiving a bit pattern from the device; and
after a start of data pattern is received by the sequencer and while the sequencer circuit recognizes the received bit pattern as other than invalid, comparing the received bit pattern against the expected bit pattern;
computing a bit error rate based on the number of compared bits and the number of error bits, wherein error bits are bit pattern bits that differ from corresponding bits in the expected bit pattern.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for measuring a bit error rate of a system. A sequencer circuit is programmed to recognize at least one predefined invalid bit pattern. An expected bit pattern is stored, and a bit pattern is received from the device. After the sequencer detects a start of data pattern in the incoming signal and while the sequencer circuit recognizes the received bit pattern as valid, the received bit pattern is compared against the expected bit pattern. A bit error rate is computed based on the number of compared bits and the number of error bits, wherein error bits are bit pattern bits that differ from corresponding bits in the expected bit pattern.
-
Citations
18 Claims
-
1. A method, comprising:
-
programming a sequencer circuit to recognize at least one predefined invalid bit pattern;
storing an expected bit pattern;
receiving a bit pattern from the device; and
after a start of data pattern is received by the sequencer and while the sequencer circuit recognizes the received bit pattern as other than invalid, comparing the received bit pattern against the expected bit pattern;
computing a bit error rate based on the number of compared bits and the number of error bits, wherein error bits are bit pattern bits that differ from corresponding bits in the expected bit pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A computer readable memory device embodying a computer program of instructions executable by the computer, the instructions comprising:
-
programming a sequencer circuit to recognize at least one predefined invalid bit pattern;
storing an expected bit pattern;
receiving a bit pattern from the device; and
after a start of data pattern is received by the sequencer and while the sequencer circuit recognizes the received bit pattern as other than invalid, comparing the received bit pattern against the expected bit pattern;
computing a bit error rate based on the number of compared bits and the number of error bits, wherein error bits are bit pattern bits that differ from corresponding bits in the expected bit pattern. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A test instrument for measuring a bit error rate of a device, comprising:
-
a sequencer circuit capable of receiving a bit pattern from the device and modifying the received bit pattern by removing bit patterns previously identified to the sequencer as invalid;
a memory capable of storing an expected bit pattern;
a digital comparator having a first input, a second input, and an output, wherein the first input is connected to an output of the sequencer circuit and is capable of receiving bit pattern as modified by the sequencer, wherein the second input is connected to the memory and is capable of receiving the stored expected bit pattern, and wherein the output is capable of receiving result of a comparison of bit pattern applied to the first input with bit pattern applied to the second input; and
a bit error rate calculator with input connected to the output of the digital comparator, wherein the bit error rate calculator has capability of calculating a bit error rate. - View Dependent Claims (16, 17, 18)
-
Specification