EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 - Manual (Page 186)

Test Results
176 FTB/IQS-85100G
Alarms/Errors

LOAML (Loss of Alignment Marker Lock)
RX: In lock mode, four consecutive marker values are received that do
not match the alignment marker that the lane is currently locked to.
The LOAML alarm is cleared when the PCS Lane is declared Lock and
two valid alignment markers 16384 blocks (66b) apart are received.

Exc. Skew (Excessive Skew)
RX: The skew exceeds the defined threshold (see Skew Alarm
Threshold (bits) on page 133).
Errors

Block is available with Ethernet test applications and 100GbE over
OTU4
RX: Invalid 64b/66b block code are received. An invalid 64b/66b block
is declared when the synchronization field has a value of 00 or 11.

Inv. Marker (Invalid Marker)
RX: There are errors in the 66-bit block alignment marker.

PCS BIP-8
RX: There are PCS lane bit-interleave parity error. A routine even-parity
check is performed over all bits of a PCS lane, from and including the
previous alignment marker, but not including the current alignment
marker.

PCS BIP-8 Mask is available with 40GbE over OTU3 test.
RX: At the OTN ingress, the calculated 8-bit error mask contains at least
one bit set to “1”.

OTN BIP-8 is available with 40GbE over OTU3 test
RX: Indicates for each lane that at the OTN egress, the calculated 8-bit
error contains at least one bit set to “1”.