VeEX MPA User Manual page 279

MPA_e_manual_D07-00-129P_RevA00
Protocol Tabs
Payload Pattern
Clock Reference
SONET Transmit - Set / Set 2
Use the Set 1 and Set 2 screens to configure the SONET Transmit parameters.
The following describes the functions that appear on the Set 2 screen.
Function
279
Allows the user to select a test pattern to transmit over the
SONET signal.
Select one of the following patterns:
PRBS 9, PRBS 9 Inv,
PRBS 15 Inv, PRBS 20,
23 Inv, PRBS 31, PRBS 31
(32-bit value).
If licensed for GFP, then
available.
The User Defined Payload Pattern is unsupported when
Unframed BERT mode is selected.
Determines the timing source for the transmit signal. Select
one of the following:
Internal. Derives the transmit data's timing source from the
Chassis Clock setting, as configured on the System tab >
MISC screen. CLK:INT displays in the LED Quick Status
Area when configured for Internal clocking.
Recovered. Derives the transmit timing source from the
clock signal on the receive interface. If this option is selected,
but a signal is not available, then this function defaults to
Internal. The CLK:REC displays in the LED Quick Status
Area when configured for Recovered clocking.
When SONET is mapped into OTN, the Clock Reference
setting is only available on the OTN tab.
Description
PRBS 11, PRBS 11 Inv,
PRBS 20 Inv, PRBS
Inv, or a User Defined
GFP payload option is also
PRBS 15,
23, PRBS
pattern