EXFO FTB-8100 Series, User Manual

Page: 385 / 518

System Tab
SONET/SDH Application
373
Clock Synchronization
³
LBO (Line Build Out): Allows the selection of the interface Line Build
Out that meets the interface requirements over the full range of cable
lengths. Available with DS1 interface only. Choices are:
+3.0 dBdsx
(533-655 ft)
,
+2.4 dBdsx (399-533 ft)
,
+1.8 dBdsx (266-399 ft)
,
+1.2 dBdsx (133-266 ft) , and +0.6 dBdsx (0-133 ft) .
³
Line Coding
: Allows the selection of the interface line coding. Choices
are AMI and B8ZS for DS1; AMI and HDB3 for E1.
Note:
Line Coding is not available with 2 MHz interface.
³
Framing : Allows the selection of the interface framing. Choices are SF
and
ESF
for DS1;
PCM 30
,
PCM 30 CRC-4
,
PCM 31
, and
PCM 31 CRC-4
for E1.
Note:
Framing is not available with 2 MHz interface.
³
Clock Mode : Allows the selection of the source clock that will be used
to generate the clock on the selected interface type. Choices are:
Internal : Internal clock of the unit (STRATUM 3).
Recovered
: Clock from the test optical/electrical port input signal.
Backplane : 8 kHz clock from another module on the FTB-200. Note
that the other module must support the backplane clock feature and
must be enabled (refer to
Backplane on page 378 for more
information).