VeEX RXT3900, User Manual

Page: 25 / 383

PRBS Pattern:
Use the pattern drop-down box to select the test pattern which will be inserted into the transmitted signal.
Pseudo Random Bit Sequences (PRBS) defined by ITU-T 0.150 and 0.151 standards, fixed words and 24-bit or 32 bit
user defined patterns are available.
Note : If the 32 bit user pattern entered is incorrect, the default pattern will be
0xFFFFFFFF.
Invert:
Inversion of polarity is also available.
Go back to top Go back to TOC
6.2.2 Receiver Setup
Hierarchy
Tapping the Hierarchy setup box opens the Rx Hierarchy screen. The Hierarchy setup options for the Rx are the same as for the
Tx described previously.
Interface
Tapping the Interface setup box opens the Rx Interface screen. The Interface setup options for the Rx are the same as for the Tx
described previously, except for clock offset, which is only available in Tx.
Note: Remember to use an optical attenuator to prevent receiver overload or damage – refer to the SFP chart below to determine
safe levels. Avoid looping back the Tx and Rx on a 1550nm XFP or SFP using a patchcord only – this will damage the SFP.
Structure and Payload
SDH Rx Structure and Payload configurations are the same as for SDH Tx setup described previously.
Pattern
Tapping the Pattern box opens the Rx Pattern setup screen. The pattern setup options for the Rx are the same as for the Tx
described previously, except for the Out of Service selection, which should be selected if the incoming signal is expected to
contain a known test pattern. Deselect this option if signal is expected to contain live traffic.
Go back to top Go back to TOC
RXT-3900 e-Manual D07-00-111P Rev A00