User guide

DS3 Test
248 AXS-200/805/855
Facility Results
³ Events - CNT, BER, ES, EFS, %EFS, or SES: indicates the event types
and allows the selection of the count (CNT), Bit Error Rate (BER),
count of Errored Second (ES), count of Error Free Second (EFS),
percentage of Error Free Second (%EFS), or count of Severely Errored
Second (SES).
C-Bit (control bits): Its functionality varies depending on T3 framing
format. Usually, C-bits are used for stuffing bit indicators.
BPV (Bipolar Violation): Occurs when the next successive pulse in
transmission, is of the same polarity at the previous pulse.
F-Bit (Framing Bit error): indicates that the frame alignment pattern
received is different of 1001.
P-Bit (parity Bit): Is used to check the parity for the previous M-Frame.
Possible values are 11 and 00.
FEBE (Far End Block Error): Is an alarm signal, which indicates the
transmitting node that the receiver has detected a block error.
EXZ (Excessive Zeros): For AMI coded signal, the defect occurs when
more than fifteen contiguous zeros are detected. For a B8ZS coded
signal, the defect occurs when more than seven contiguous zeros are
detected.
Note: When there is no error, event, and bit
error, the NO ERRORS is displayed if
Show NO ERRORS is selected (see
Show NO ERRORS on page 255).