EXFO FTB-860, User Manual

Page: 116 / 409

EtherBERT Test Setup and Results
104
FTB-860/880
Global Configuration
Service Disruption

No Traffic Time : The No Traffic Time configuration allows you to
configure the time between two Ethernet Frames that is acceptable
without raising an alarm. It also describes when a Service Disruption
event occurs. Select the acceptable delay between the two frames.
The acceptable range is from
0.005 ms to 1000 ms . The default value
is
50 ms
.

SDT Threshold : The SDT Threshold represents the amount of time
with no traffic that is accepted before failing the test. Enter the
threshold value. The accepted range is from
50 ms to 300000 ms. The
default value is
50.00
ms
.
The threshold value cannot be less than the
No Traffic Time value.
BER

Test Pattern : Select a test pattern. Choices are as follows:
PRBS 2^9 - 1
PRBS 2^11 - 1
PRBS 2^15 - 1
PRBS 2^20 - 1
PRBS 2^23 - 1
PRBS 2^31 - 1
User Pattern
: Go to the next field to define the user pattern
parameter that indicates the test pattern to be used. The user
pattern is a 32-bit (4-byte) value. The default value is
0
.

Invert : Enable or disable Invert . If enabled, the test pattern is
transmitted/analyzed with all bits inverted meaning that every 0 is
changed to 1, and every 1 to 0. For example, the pattern 1100 will be
sent as 0011. The test pattern inversion is disabled by default.

BER Threshold : If the Pass/Fail verdict is enabled, select the threshold
amount as follows: