Agilent Technologies N4906B Serial BERT User Manual page 30

Setting up Patterns
Fiber Channel/Gigabit Ethernet
30
This folder contains the following subdirectories with example
patterns:
FDDI
• FDDI_Jitter.ptrn
The Fiber Distributed Data Interface (FDDI) data dependent jitter
test pattern is used for testing FDDI components or physical links.
The pattern is 1280 bits long and is transmitted continuously during
the test by repeating the pattern. The sequence causes a near worst
case condition for inter-symbol interference and duty-cycle, base-
line wander.
• FDDI_Wander.ptrn
The FDDI baseline wander test pattern is used to test FDDI
components for the effects of a change in the average DC level of the
signal. The first 45,000 bits are of the code group (01010); the last
45,000 bits are of the code group (10101).
• SPAT.ptrn
This is a Fiber Channel supply noise stimulus test pattern.
• RPAT.ptrn
This is a Fiber Channel random data pattern.
• K28-7.ptrn
This pattern is used to test Fiber Channel and Gigabit Ethernet
elements. It has a large low frequency content that is used to test
low frequency random jitter (RJ) and PLL tracking errors. The
pattern is composed of five logic highs, followed by five logic lows.
This is repeated continuously and disparity rules are followed.
11111 00000
11111 00000 (binary).
• K28-5.ptrn
This pattern is used to test Fiber Channel and Gigabit Ethernet
elements. It tests random jitter (RJ) and deterministic jitter (DJ).
The pattern is composed of 10 bits, followed by the complement of
those 10 bits. It contains isolated characters preceded by runs of the
opposite character. Disparity rules are followed.
11 00 00 01 01
00 11 11 10 10 (binary)
• JTPAT.ptrn
This is a Fiber Channel jitter tolerance pattern, used to test receiver
CDR to large instantaneous phase jumps.
Agilent N4906B Serial BERT, User's Guide, October 2005
User Patterns