SONET/SDH Configuration and Testing
Setting Up for Testing STS-3c and STM-1 Signals
4
4-9
Setting the Transmit Clock Source
For proper testing and valid results, clock synchronization of theOC3port Plus
with the network under test may be required. To set the transmit clock source, do
the following:
Note
The sample screens shown in this procedure are STS-3c screens. If
the framing format you selected is STM-1, the OC3port Plus displays
equivalent STM-1 screens.
1.
Press the
SONET
key. The
SONET SELECTIONS
menu displays.
2.
Press the
Down Arrow
key to move the
Setup STS-3c
or
Setup STM-1
option to
the selection line. Then, press
ENTER
. The
STS-3c SETUP
submenu is
displayed.
3.
Press the
Down Arrow
key to move the
XMIT CLK Source
option to the selection
line:
STS-3c SETUP:
L/P Auto FEBE OFF
XMIT CLK Source INT
STS-3c Scrmblg ON
za043f.eps
4.
Then, press the
Left
or
Right
key to change to one of the following settings:
•
INT
Transmits data using the internal clock on the OC3port Plus
(155.52 MHz) (the default)
•
LPR
(Loop Recovered). Uses the frequency of the recovered signal to
transmit data.
The tester is now configured with your clock source selection.
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