Instruction Manual

Generator
Optical interfaces
Wavelengths ................................1310 nm, 1550 nm
or 1310/1550 nm switchable
Output level at 1310 nm and 1550 nm . . .......... 0dBm+0/±2dB
Line code .................................... scrambled NRZ
Electrical interfaces
Line code..................................... scrambled NRZ
Output voltage (peak-peak).............................
-
4
0.6 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,B2parity errors
Single error or error rate B1 ..................2610
±5
to 1610
±10
B2 ..................2610
±3
to 1610
±10
additionally, for OC-48 ..................................REI-L
forSTM-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
forSTM-16 .................. LOF,MS-AIS, MS-RDI
m alarms in n frames . . .................m=1ton-1,n
max
= 8000
or
t1 alarm active, t2 alarm passive .................... t1=0to60s,
t2 = 0 to 600 s
Alarm generation, static (on/off)
Alarm types ....................................... LOS,LOF
additionally, for OC-48 ............................AIS-L, RDI-L
forSTM-16.......................MS-AIS, MS-RDI
Receiver
Optical interfaces
Wavelength ................................. 1260 to 1580 nm
Line code..................................... scrambled NRZ
Sensitivity .................................... ±28to±8dBm
Input overload .....................................4± 8 dBm
Display of optical input level
Range . ...................................... ±30to±8dBm
Resolution .............................................1dB
Electrical interfaces
Line code .................................... scrambled NRZ
Input voltage (peak-peak) ............................ 0.3to1V
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 ............................ B1parity 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 . .................................... 1s
Alarm detection
Alarm typs ................................... LOS,LOF,OOF
additionally, for OC-48 .....................AIS-L, RDI-L, TIM-L
forSTM-16............... MS-AIS, MS-RDI, RS-TIM
Alarm event resolution ................................ 100ms
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 . ..............................................16bits
Error insertion
Bit errors in test pattern, single error or
error ratio ................................ 1610
±3
to 1610
±9
11