EXFO Power Blazer 88200NGE, User Manual

Page: 662 / 887

Test Functions
652
88000 Series
OH BERT
OH BERT
The OH BERT validates the integrity of some overhead bytes on the top
layer of an OTN test signal. The OH bytes are bundled as group for test
purposes.
From the Test menu, tap Functions , and the OH BERT tab.
Note:
Only supported with Coupled topology.
OH BERT
The
OH BERT
check box when selected (cleared by default), enabled the
OH BERT/SYNC generation and monitoring.
Mode
Allows selecting the test operating mode:

BERT
(default) is a typical BER test that is executed on the selected
group of OH bytes, a PRBS15 test pattern is mapped in each individual
OH group for BER evaluation.

SYNC is a special test which validates that the content of each selected
OH group is carried by the same OTUk frame throughout its transfer
over the network.
Invert PRBS15 Pattern
Invert PRBS15 Pattern check box, when selected (cleared by default),
inverts the test pattern meaning that every 0 will be changed for 1 and
every 1 for 0. For example, the pattern 1100 will be sent as 0011. Available
with BERT mode only.