Atec JDSU-ONT Series - Manual (Page 13)

ONT-5xx 40/43 Gb/s Test Solution
13
Client offset – stuffing
The asynchronous SONET and SDH client offset can be adjusted
within the ± 65 ppm range and the stuffing rate of the client can
thus be manipulated.
Overhead
Overhead bytes (frame alignment/OTU/ODU/OPU)
All bytes statically programmable except MFAS, SM BIP, PM BIP, •
TCM1...6 BIP
Additional possibilities for SM TTI, PM TTI, TCM1...6 TTI (Trail Trace
•
Identifier):
Sequence consisting of the SAPI (16 bytes) and
DAPI (16 bytes) and the operator specified (32 bytes).
User designed payload structure identifier (PSI), payload type
•
identifier clear text and support of MSI
One OH byte can be selected for a freely defined sequence of
•
16/32/64/128/256 bytes
FTFL free definable forward/backward (FW/BW) fault indication
•
and operator identifier
Error insertion
Type Random, FAS, MFAS
SM BIP-8, SM BEI, PM BIP-8, PM BEI
TCMi BIP-8, TCMi BEI (i = 1 to 6)
Bit errors (only available with PRBS test signal)
Trigger Single , rate, burst , burst continuous
Burst error M frames errors, N frames error free,
M and N = 0 to 2 31
Rate
Error name Min rate Max rate Stepping
Random 1 Ч 10 -10 1 Ч 10 -3 Exponential
Bit 1 Ч 10 -12 1 Ч 10 -3 Exponential
FAS 4.9 Ч 10 -12 1 Ч 10 -3 0.1
MFAS 3.0 Ч 10 -11 1 Ч 10 -3 0.1
SM BIP 1 Ч 10 -12 6.6 Ч 10 -5 0.1
SM BEI 1 Ч 10 -12 6.6 Ч 10 -5 0.1
PM BIP 1 Ч 10 -12 6.6 Ч 10 -5 0.1
PM BEI 1 Ч 10 -12 6.6 Ч 10 -5 0.1
TCMi BIP 1 Ч 10 -12 6.6 Ч 10 -5 0.1
TCMi BEI 1 Ч 10 -12 6.6 Ч 10 -5 0.1
BIP masks
The position and number of bit errors in the bytes can be selected.
Valid for SM BIP, PM BIP, TCMi BIP (i = 1 to 6)
BEI value
To stress the BEI evaluation of the DUT receiver the BEIs can be set
to values 0 to 15
Valid for SM BEI, PM BEI, TCMi BEI (i = 1 to 6)
Alarm generation
Type LOF, OOF, LOM, OOM
OTU-AIS, ODU-AIS, ODU-OCI, ODU-LCK, SM BDI,
SM IAE, SM BIAE, PM-BDI, PM-TM
FW-SD, FW-SF, BW-SD, BW-SF
TCMi-LTC, TCMi-BDI, TCMi-BIAE, TCMi-TIM (i = 1 to 6)
Trigger
Continuously All alarms
Burst once/
Burst continuous all errors except LOF, OOF, OOM, SD, SF, TIMs
Burst alarms
M frames with alarm, N frames no alarm,
M = 1 to 2 31
N = 0 to 2 31
OTU FEC
The FEC generation can be switched on and off. Using the OTU FEC
field, FEC according to the Reed-Solomon (255,239) algorithm is
performed on the generated frame. With data blocks consisting of
239 data bytes and 16 FEC field bytes, up to 16 byte errors can be
detected or 8 byte errors be corrected.
FEC error insertion modes
FECcorrectable, FECuncorrectable •
FECstress: This extremely helpful function allows maximum stress •
tests within a short time frame.
The maximum possible number of errors that the device under
test (DUT) should still be able to correct is inserted into the OTU
frame.
FECadvanced
FECadvanced allows the user to define a detailed position for error
insertion in the OTU frame. Correction capability testing below and
above the correction limit can be performed.
Selectable parameters: row, subrow, errored bytes per subrow,
Start position in subrow, byte error mask
Analyzer
OPU-3 mapping of client signals:
CBR40G with SDH/SONET client (optional, BN 3061/91.52) •
– STM-256/STS-768 signal.
– Analysis see 4”0G SDH/SONET applications” page 9.
PRBS test signal
•
– PRBS 2 31 -1, 2 23 -1, 2 15 -1, 2 7 -1, 2 31 -1 inv., 2 23 -1 inv. 2 15 -1 inv.,
2 7 -1 inv., (conforming to ITU-T O.150)
– Digital word 32 bit free programmable
Null client
•
OTN multiplexing (optional, see page 16) •
All clients can be de-mapped bit-synchronous and asynchronous
Stuffing of the client
Display of client offset in ppm