Agilent Technologies Auroraduet N1726A, Руководство пользователя, Страница: 188 / 507

Issue 01 - 06/99 4 - 47
Testing in Simulate Mode - Section 2
The following table explains the BERT results.
BERT Results Display
Elapsed
Time
The length of time the test has been running, in hours,
minutes and seconds.
Rx Kbits The number of kilobits of data received while the BER test
is running and in pattern synchronisation
Bit Errs The number of bit errors received while the BER test is
running and in pattern synchronisation
BER Bit Error Rate, displayed in exponential format.
ES
The number of Errored Seconds. An errored second is
any second during which one or more bit errors are
received.
US The number of Unavailable Seconds. These are seconds in
which the error rate is so high that the link is considered
to be unavailable.
SLOSS
The number of occassions when pattern synchronisation
has been lost.
SES The number of Severely Errored Seconds. A severely
errored second is one in which the bit error rate is worse
than 1 x 10
-3
.
DM The number of Degraded Minutes during the test. A
degraded minute is one in which the bit error rate is
worse than 1 x 10
-6
.
2
Note
Very large or very small values requiring more than 8
digits including the decimal point, are displayed in
exponential format (y.yyyEsxx), where ‘y.yyy’ is a
floating point number, ‘E’ is the exponent, ‘s’ is the sign
of the exponent (either ‘minus’ or ‘plus’), and ‘xx’ is the
2-digit exponent.
Checking that the patterns are synchronised
For BERT to be reliable, the pattern aurora
Duet
receives
back across the line must be synchronised with the
pattern it is transmitting, so that they can be compared.
Chap4s2.PM6 17/06/99, 09:43 47