Atec JDSU-ANT-5 - Manual (Page 9)

9
ANT-5 SDH ACCESS TESTER
Measurement Selection
The ANT-5 offers direct selection of the following measure-
ment tasks:
– Performance Analysis
– Repetitive BERT
– Automatic Protection Switching (APS)
– OH-Capture (SDH only)
– Delay (RTD)
– Tributary Scan (SDH only)
Performance Analysis
ITU-T Recommendation G.821
ES, EFS, SES, DM, and UAS are evaluated. Pass/fail assessment
is based on line length allocation of 1 to 100%. Evaluation for
higher bit rates (up to 140 Mbps) is obtained using a multi-
plex factor as per annex D of G.821. Measurements can be
made using the following events: bit errors (TSEs), FAS-2,
CRC-4, E bit, code errors (2 Mbps), FAS-34, and FAS-140
ITU-T Recommendation G.826
EB, BBE, ES, EFS, SES, and UAS are evaluated. Pass/fail assess-
ment is based on line length allocation of 1 to 100%.The SES
and UAS thresholds can be set by users.
In-service measurement (ISM)
Simultaneous in-service measurement of the near end and far
end of a selected path. Measurements can be made using the
following events: RSOH B1,MSOH B2,HP B3,FAS-140,FAS-34,
FAS-2, CRC, code errors (2 Mbps), and LP-BIP.
Out-of-service measurement (OOS)
Out-of-service measurement using bit errors in the test pat-
tern (for PDH and SDH).
ITU-T Recommendation G.828 Results
ES, EFS, SES, BBE, SEP, and UAS are evaluated. Pass/fail
assessment is based on path allocation of 1 to 100%.The SES
and UAS thresholds can be set by users.
Hierarchy
RSOH B1, MSOH B2, HP B3, LP-BIP,TSE
ITU-T Recommendation G.829
ES, EFS, SES BBE, and UAS are evaluated.The SES threshold can
be set by users.
Hierarchy
RSOH B1, MSOH B2,TSE
ITU-T Recommendation M.2100
ES, EFS, SES, and UAS are evaluated. Pass/fail assessment is
based on line length allocation
of 1 to 100%.The UAS and BISO (bringing into service objec-
tives) thresholds can be set by users.
PDH systems
Measurements can be made using the following events:
TSE, FAS-1.5, FAS-2, FAS-34, FAS-140, CRC, and code errors
(2 Mbps)
ITU-T Recommendation M.2101
ES, EFS, SES, BBE, SEP, and UAS are evaluated. Pass/fail assess-
ment is based on line length allocation of 1 to 100%.The UAS
and BISO (bringing into service objectives) thresholds can be
set by users. ISMs can be performed simultaneously for the
near end and far end of a selected path.
Measurements can be made using the following events:
TSE, LP-BIP, HP-B3, MSOH-B2, and RSOH-B1
Repetitive BER Test
– BER evaluation over a user-definable period of 1-99 seconds
– Automatically repeating feature
– Progress bar displays the current test period
– Large character display of BER result
Auto Protection Switching (APS)
Operates on SDH and PDH interfaces (2 M)
Trigger criteria
MS-AIS, AU-AIS,TU-AIS, or
bit error service disruption*
Pass/fail time limits 10 to 2000 ms
Resolution 1 ms
*Definition of service disruption:
Measurement starts with any of the following events:
TSE, AIS, LOF, or LOS
Measurement stop trigger
Last event
Overhead Byte Capture (SDH only)
Byte capturing with number and time frame recognition for
linear and ring structures.
Trigger source
K1, K2 byte
Trigger criteria Manual, Compare, Compare Not
Delay (RTD)
Resolution ±1 µs
Except for:
E1 PDH
±100 µs
E1 SDH VC-12 ±100 µs
E2 (within PDH E3 or E4) ±10 µs
VC-11/-12 bulk ±10 µs
Measurement range 10 s
VC-12 Tributary Scan (SDH only)
Enables sequential BER testing of C12 channels using config-
ured test pattern. Automatically scans selected VC-12 contain-
ers for defects and anomalies.
Technical
Specifications-
Measurement Selection
Figure 11: Measurement selection Figure 12: G.826 performance analysis