User guide

E1-A and E1-B Tests
Multi Protocol Test Set 235
Setup Configuration
³ BERT: Select the test pattern. Choices are OFF, Auto, QRSS, 3 in 24,
1:7, 1 in 8, All 1's, All 0's, 1:1 Alt, DALY, 2^15-1, 2047, 2 in 8, and
1in16. The default setting is OFF.
OFF: Disables the BERT pattern.
Auto: Detects and uses the incoming BERT pattern.
QRSS: Industry standard Quasi-Random Signal is formed from 20 Bits
with max of 14 consecutive zeros.
3 in 24: Three ones in 24 bits used to stress AMI lines (0100 0100 0000
0000 0000 0100).
1:7,1 in 8: This pattern uses a single one in an eight-bit (0100 000)
repeating sequence. This pattern stresses the minimum ones density
of 12.5%.
All-1’s: All data content is 1’s 1111. In unframed mode this will be
interpreted as AIS.
All-0’s: All data content is 0’s 0000.
1:1 Alt: Alternates 1 and 0, …1010.
DALY: Pattern that obeys pulse density and consecutive zeros in both
AMI and B8ZS coding.
2^15-1: Quasi-random sequence of 32767 bits which contains up to
14 consecutive zero’s.
2047: 2047 Bit sequence commonly used for 64 K E0 channel testing
(DDS).
2 in 8: Two 1’s in 8 bits, used for stress testing AMI & B8ZS lines.
1 in 16: Violates 1’s density but stresses clock recovery circuitry
³ INVERT BERT: Allows to invert the selected BERT pattern meaning that
every 0 will be changed for 1 and every 1 for 0. The default setting is
OFF.