JDS Uniphase SmartClass E1, Руководство пользователя

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Chapter 4 E1 Testing
Specifying test application settings
SmartClass E1 Tester User’s Guide 31
3 If you need to specify other settings for the test, press Cancel to return to
the Configuration menu.
The interface settings are configured.
Specifying E1 framing
settings
Before transmitting E1 traffic, you can specify the framing format and payload
of the traffic you want to transmit.
To specify E1 framing settings
1 If you haven’t already done so, launch an E1 application (see “Launching
an E1 test application” on page 28 ).
2 On the Configuration menu, select E1 Frame Settings , and then specify
values for the settings listed below:
Tx Clock Select one of the following:
–
Internal
– Rx1
– Rx2
– Ext. BNC
NOTE: If timing is lost, the SmartClass reverts
to internal timing.
Tx Clk Offset (ppm) Enter a value, from -100 through 100 ppm, to
indicate the offset frequency generated by the
2048 kbit/s internal clock.
To specify negative numbers, press the
# key.
To delete a single character, press the down
arrow key.
Slip Reference Select one of the following slip reference
options:
–
Rx2
– Ext. BNC
Setting Parameter
Setting Parameter
Framing Select the framing format for the signal:
–
PCM31C
– PCM31
– PCM30C
– PCM30
– Unframed
Payload Select the payload:
–
Bulk : full E1 circuit
– n x 64k : individual timeslot(s) from an E1
circuit