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Operating Basics: User Interface
OTS9100 User Manual 2-35
Edit Path Overhead
To edit the path overhead, click the Edit
button. This brings up a Path Overhead
dialog box, shown in Figure 2-17. The
dialog box displays the overhead bytes in
white text boxes. To edit, highlight the
appropriate box and type in the desired
entry. To set the overhead back to its
default state, click the Restore Defaults
button. When editing is complete, click OK
to return to the main screen.
Path Through Mode
When using through mode, a number of the
Path overhead bytes may be overwritten as
the external signal passes through the
module. This is done through the use of the
Through Mode selections available in the
Path Overhead menu, as shown in Figure 2-
18. If the box is checked for Regenerate B3
Parity, the receiver will recalculate the B3
parity and insert the new information into the
overhead as the signal is passed through the module.
To disable B3 parity regeneration, ensure that the
Regenerate B3 Parity box is not selected.
To overwrite an incoming byte, click in the box beside
the selection under the Overwrite Incoming heading.
If you wish to keep a byte from being overwritten,
make sure the box beside the selection is not checked.
The bytes available to be overwritten are J1 Trace, C2,
G1, F2, H4, Z3, Z4, and Z5. B3 parity regeneration is
always enabled if any of the byte or payload overwrite
selections are checked.
If Overwrite Payload is checked, the payload data is
replaced with the Test Pattern selected on the Signal
page.
NOTE: There is no explicit byte edit for G1. Checking
the G1 overwrite setting provides the ability to insert
REI-P.
Figure 2-17:
Path Overhead
dialog box
NOTE: The Tx Signal
Structure in the Tx
Setup menu must
match the Signal
Structure of the mating
Rx in order for intrinsic
Path Through mode to
operate correctly. If the
Signal Structure of the
Tx does not match the
Signal Structure of the
Rx, the overwritten
bytes will not be
accurate. This is also
true for B3
regeneration.