JDS Uniphase SmartClass E1, Руководство пользователя

Страница: 71 / 144

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.