JDS Uniphase SmartClass E1 - Specifying Polarity Settings; Specifying a BERT Pattern

Chapter 5 Datacom Testing
Specifying test settings
SmartClass E1 Tester User’s Guide 55
Specifying polarity settings The following procedure describes how to configure clock and data polarity
settings.
To specify polarity settings
1 If you haven’t already done so, launch the Data Communication applica-
tion (see “Launching the datacom application” on page 52).
2 On the Configuration menu, select Polarity, and then specify values for
the following settings:
You have finished specifying the polarity settings.
Specifying a BERT pattern You can specify a specific BERT pattern for your test.
To specify a BERT pattern
1 If you haven’t already done so, launch the Data Communication applica-
tion (see “Launching the datacom application” on page 52).
2 On the Configuration menu, select BERT Pattern Settings, and then
choose a pattern:
Setting Parameter
RxClock Polarity Specify the polarity for the Rx Clock:
– Normal. Uses the phasing specified by the inter-
face standard.
– Inverted. Uses the inverse of the phasing specified
by the interface standard.
TxClock Polarity Specify the polarity for the Tx Clock:
– Normal. Uses the phasing specified by the inter-
face standard.
– Inverted. Uses the inverse of the phasing specified
by the interface standard.
RxData Polarity Specify the polarity for the received data:
– Normal. Uses the phasing specified by the inter-
face standard.
– Inverted. Uses the inverse of the phasing specified
by the interface standard.
TxData Polarity Specify the polarity for the transmitted data:
– Normal. Uses the phasing specified by the inter-
face standard.
– Inverted. Uses the inverse of the phasing specified
by the interface standard.
Pattern Description
PRBS 63 Selects the 2
6
-1 pseudorandom pattern, which
generates a maximum of 5 sequential 0s and 6
sequential 1s.
PRBS 511 Selects the 2
9
-1 pseudorandom pattern, which
generates a maximum of 8 sequential 0s and 9
sequential 1s.