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InfoMagic Standards 1994 January
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1992
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o151a.asc
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1991-12-31
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7.Proposed amendments to Recommendation 0.151
Change the title of the Recommendation as follows:
"ERROR PERFORMANCE MEASURING EQUIPMENT FOR DIGITAL SYSTEMS AT THE
PRIMARY RATE AND ABOVE".
In the preamble and section 1 General replace the words, bit error
ratio by: "error performance".
Renumber existing 2.3 to 2.4 and insert a new 2.3 to read:
"2.3 Pseudorandom pattern for systems using 220-1 pattern length
This pattern may be generated by a twenty stage shift register with
feedback taken from the seventeenth and twentieth stages. The output signal
is taken from the twentieth stage, and an output bit is forced to be a "one"
whenever the next 14 bits are all "zero".
The quasi-random sequence satisfies the following:
Modify Table 2/0.151 to show both bit patterns 215 -1 and 220 -1 to be
specified for the 1544, 6312, 32064 and 44736 bit rates.