EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 - Manual (Page 300)

Test Functions
290 FTB/IQS-85100G
OH - OTN

PSI, column 15, OPU/ODU OH: Tap the PSI field to configure (TX) or
display (RX) the Payload Structure Identifier.

TX: Select any TX byte from the list and its content is displayed
below the list. Tap the Edit button to change its value.

RX: Select any RX byte from the list and its content is displayed
below the list.

Link TX/RX Scrolling, when selected (cleared by default), allows
to synchronize both TX and RX table allowing to see the same TX
and RX PSI byte numbers when scrolling from either TX or RX
table.

Foreground Signal Label: Indicates the status of the MSI for each
PSI#, either MSI TX (black), Expected MSI RX (green), or MSI
Mismatch (red).

OMFI or NJO
OMFI, column 16, OPU OH: OPU Multi-Frame Identifier is only
available for OPU4 of a mapped signal. This byte is not configurable.
NJO, column 16, ODU OH: The Negative Justification Opportunity byte
is not configurable. Available either for non-concatenated signal or on
the LO of a concatenated signal.
RX

RX OH Byte Details displays the content of the selected OH RX byte.
Tap on any OH RX byte to see its content

Legend TX/RX indicates the path level for all OH bytes.