Atec Acterna-JDSU-ANT-20SE - Manual (Page 11)

Generator
Optical interfaces
Wavelengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1310 nm, 1550 nm
or 1310/1550 nm switchable
Output level at 1310 nm and 1550 nm . . . . . . . . . . . . 0 dBm +0/±2 dB
Line code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . scrambled NRZ
Electrical interfaces
Line code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . scrambled NRZ
Output voltage (peak-peak). . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 40.6 V
Connector/impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMA/50 O
Clock generator
Internal, accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2 ppm
Offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +50 ppm
Synchronization from external signal as for mainframe
Generation of OC-48 TX signal
In instruments with STS-1/STS-3c mappings
The OC-48 signal consists of one or more internally generated
tributaries plus several tributaries filled with UNEQ (or non-specific
UNEQ)
± 48 identical STS-1
± One STS-1 tributary and 476UNEQ/non specific
± 16 identical STS-3c (Option BN 3060/90.02 required)
± One STS-3c tributary (Option BN 3060/90.02 required)
and 156UNEQ/non specific
± Four identical STS-12c (Option BN 3060/90.90 required)
± One STS-12c tributary (Option BN 3060/90.90 required)
and 36UNEQ/non specific
Generation of STM-16 TX signal
In instruments with STM-1 mappings
The STM-16 signal consists of one or more internally generated
tributaries plus several tributaries filled with
UNEQ (or non-specific UNEQ)
± 16 identical STM-1
± One STM-1 tributary and 156UNEQ/non specific
± Four identical STM-4c (Option BN 3060/90.90 required)
± One STM-4c tributary (Option BN 3060/90.90 required)
and 36UNEQ/non specific
Contents of OC-48/STM-16 overhead bytes
For all bytes except B1, B2 and H1 through to H3:
± The contents of the bytes in all SOH/TOH are statically
programmable
For the bytes E1, E2, F1 and the DCC channels D1 to D3 and
D4 to D12:
± Transmission of a test pattern and bit error insertion
(see mainframe for pattern selection)
± Insertion of an externally-generated data signal
(via V.11 interface)
For the K1, K2, N1, N2 bytes:
± Insertion of an external data signal via the V.11 interface
For the J0 byte:
± Transmission of a 16-bit sequence with CRC
Error insertion
Error types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B1, B2 parity errors
Single error or error rate B1 . . . . . . . . . . . . . . . . . . 2610 ±5 to 1610 ±10
B2 . . . . . . . . . . . . . . . . . . 2610 ±3 to 1610 ±10
additionally, for OC-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .REI-L
for STM-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MS-REI
Single error or error rate . . . . . . . . . . . . . . . . . . . . . 2610 ±3 to 1610 ±10
Alarm generation, dynamic
Alarm types for OC-48 . . . . . . . . . . . . . . . . . . . . . . . LOF, AIS-L, RDI-L
for STM-16 . . . . . . . . . . . . . . . . . . LOF, MS-AIS, MS-RDI
m alarms in n frames . . . . . . . . . . . . . . . . . . . m = 1 to n-1, n
max
= 8000
or
t1 alarm active, t2 alarm passive . . . . . . . . . . . . . . . . . . . . t1 = 0 to 60 s,
t2 = 0 to 600 s
Alarm generation, static (on/off)
Alarm types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LOS, LOF
additionally, for OC-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . .AIS-L, RDI-L
for STM-16 . . . . . . . . . . . . . . . . . . . . . . . MS-AIS, MS-RDI
Receiver
Optical interfaces
Wavelength . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1260 to 1580 nm
Line code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . scrambled NRZ
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 28 to ±8 dBm
Input overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4±8 dBm
Display of optical input level
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30 to ±8 dBm
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB
Electrical interfaces
Line code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . scrambled NRZ
Input voltage (peak-peak) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 to 1 V
Connector/impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMA/50 O
A selectable STM-1, STS-1 or STS-3c channel is fed to the internal
evaluation circuits by demultiplexing from the input signal.
Error measurement
Error types . . . . . . . . . . . . . . . . . . . . . . . . . . . . B1 parity error, MS-REI,
B2 parity sum error over
all STM-1/STS-1/STS-3c channels
Evaluation (bit/block errors) . . . . . . . . . . . . . . . . . . . . error rate, count
Error event resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 s
Alarm detection
Alarm typs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LOS, LOF, OOF
additionally, for OC-48 . . . . . . . . . . . . . . . . . . . . . AIS-L, RDI-L, TIM-L
for STM-16 . . . . . . . . . . . . . . . MS-AIS, MS-RDI, RS-TIM
Alarm event resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 ms
TOH/SOH evaluation
Display of complete overhead
For the bytes E1, E2, F1 and the DCC channels D1 to D3 and D4
to D12:
± BERT using test pattern from generator unit
± Output of the data signal via the V.11 interface
For the K1, K2, N1, N2 bytes:
± Data signal output via the V.11 interface
For the J0 byte:
± Display of 15-byte sequences in ASCII format
Concatenated Mapping 2488 Mbit/s
Option OC-48c/STM-16c BERT BN 3060/90.93
Only in conjunction with BN 3060/91.50 to /91.53
Contiguous concatenation signal structure to ANSI T1.105.02 and
G.707.
Error measurement to O.150
Test pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PRBS-31, IPRBS-31
PRBS-23, IPRBS-23
Programmable word
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 bits
Error insertion
Bit errors in test pattern, single error or
error ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1610 ±3 to 1610 ±9
11