VeEX MTT-14B User Manual page 61

MTT-14B e_Manual D07-00-083P RevA00 Page 61 of 101
0000: Industry-standard all zeros pattern. It is often used to make
sure that clear-channel lines have been properly provisioned for
B8ZS during circuit turn-up. If a portion of the circuit is AMI, then
pattern synch and/or signal will be lost.
FOX: Industry-standard pattern used in data communications
applications. The ASCII translation of the pattern is the 'Quick
brown fox' sentence. It is frame aligned to ensure proper ASCII
translation of the bits. It is recommended that the pattern be sent
with framed signals, otherwise ASCII translation is not possible.
This is the pattern: 2A, 12, A2, 04, 8A, AA, 92, C2, D2, 04, 42,
4A, F2, EA, 72, 04, 62, F2, 1A, 04, 52, AA, B2, 0A, CA, 04, F2,
6A, A2, 4A, 04, 2A, 12, A2, 04, 32, 82, 5A, 9A, 04, 22, F2, E2, 04,
8C, 4C, CC, 2C, AC, 6C, EC, 1C, 9C, 0C, B0, 50.
QRSS: Industry-standard Quasi Random Signal is formed from
a 20 stage shift register and is zero-constrained for a maximum
of 14 consecutive zeros. When transmitted in a framed signal,
up to 15 consecutive zeros will occur in accordance with AMI
minimum density requirements.
1-4: Used to stress test circuits. The frame aligned pattern is
0100.
1-8: Industry-standard pattern used for stress testing AMI and
B8ZS lines. It is frame aligned ('f' is the framing bit) as shown in
its binary form: f 0100 0000.
3-24: Industry-standard pattern used for stress testing AMI lines.
The pattern is frame aligned ('f' is the framing bit) as shown in its
binary form: f 0100 0100 0000 0000 0000 0100.