Test Setup - Test Configurator, Timer, and System
MaxTester 175
Signal - Signal Configuration (OTN)
Signal - Signal Configuration (OTN)
Note: The following signal configuration parameters are available from the
interface block.
From the Test menu, tap Setup, Test Configurator, the interface block,
and on the Signal tab.
OTU4, OTU2, or OTU1
Note: At least one of the two check boxes, FEC or Scrambler, must be selected in
order to prevent potential alarms caused by a lack of bit transition on the
optical signal. For example to disable FEC, first select the Scrambler check
box then clear the FEC check box.
FEC check box when selected (default) enables the FEC in TX/RX
and allows detecting, reporting, and correcting up to 8 symbol
errors (Correctable) per codeword. If there are over 8 symbol
errors detected, they are reported as uncorrectable errors.
FEC-CORR Alarming check box when cleared (selected by
default) does not report the FEC-CORR error status
(current/history), seconds, and does not affect the global test
verdict. Only available when FEC is enabled.
Scrambler check box when selected (default) provides enough
“0” and “1” transitions on the optical signal for clock recovery.
Note: When the Scrambler check box is cleared, the receiver circuitry is forced to
operate in a condition which is outside of the specified OTN operating
conditions, potentially causing alarms/errors. This configuration can be
used for special analysis in a lab environment.
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