Optical Interfaces
All of the optical interfaces are intended for single-mode fibers. Acterna
offers a complete line of optical test adapters. Select one test adapter
each for the generator and receiver from the ordering information in
this data sheet. All optical interface options include the required
number of test adapters.
Optical Modules up to 155 Mbit/s
Optical OC-1/3, STM-0/1, 1310 nm BN 3035/90.43
Optical OC-1/3, STM-0/1, 1550 nm BN 3035/90.44
Optical OC-1/3, STM-0/1, 1310 & 1550 nm BN 3035/90.45
Bit rate of TX and RX signal .......................155520kbit/s
additionally, for STS-1/STM-0 mappings ...........51840kbit/s
Line code..................................... scrambled NRZ
Generator unit
The generator meets the requirements of Telcordia GR-253,
ANSI T1.105.06 (ITU-T Rec. G.957, Tables 2 and 3).
Classes LR-1, LR-2, LR-3 (L1.1, L1.2 and L1.3) are covered.
There are three options for adapting to the required wavelength:
Wavelength ............................... 1310 nm, 1550 nm,
1310 & 1550 nm (switchable in the instrument)
Output level ................................. 0dBm+2/±3dB
with 1310 & 1550 nm option .................0dBm+2/±3.5dB
Receiver unit
The receiver unit meets the specifications of Telcordia GR-253, ANSI
T1.105.06 (ITU-T Rec. G.957) and fulfills classes IR-1, IR-2 (S1.1 and
S1.2).
Wavelength range ............................. 1100 to 1580 nm
Input sensitivity ................................±8to±28dBm
(±8 to ±34 dBm typ.)
Display of optical input level
Resolution ............................................ 1dB
155 Mbit/s electrical interface
for connecting the ANT-20 to STM-1/STS-3 monitor points
Line code .................................... scrambled NRZ
Input voltage (peak-peak) ............................ 0.2to1V
Unbalanced input
Connector/impedance . ............................. SMA/50O
Optical Modules up to 622 Mbit/s
Optical OC-1/3/12, STM-0/1/4, 1310 nm BN 3035/90.46
Optical OC-1/3/12, STM-0/1/4, 1550 nm BN 3035/90.47
Optical OC-1/3/12, STM-0/1/4,
1310 & 1550 nm BN 3035/90.48
Bit rate of TX and
RX signal ......................... 155520kbit/s, 622 080 kbit/s
additionally, for STS-1/STM-0 mappings ........... 51840 kbit/s
Line code .................................... scrambled NRZ
Generator unit
The generator meets the requirements of Telcordia GR-253,
ANSI T1.105.06 (ITU-T Rec. G.957, Tables 2 and 3).
Classes LR-1, LR-2, LR-3 (L1.1, L1.2, L1.3, L4.1, L4.2 and L4.3) are
covered.
There are three options for adapting to the required wavelength:
Wavelength ................................1310 nm, 1550 nm,
1310 & 1550 nm (switchable in the instrument)
Output level ................................. 0dBm+2/±3dB
with 1310 & 1550 nm option ................ 0dBm+2/±3.5dB
Generation of STM-4 TX signal
in instruments with STM-1 mappings
The STM-4 TX signal consists of
±four identical STM-1 tributary signals (AU-4), or
±one internally generated STM-1 tributary signal with the other
three tributaries filled with UNEQ.
Generation of OC-12 TX signal
in instruments with STS-1 mappings
The OC-12 TX signal consists of
±one internally generated STS-1 tributary signal with the other
11 tributaries filled with UNEQ or
with STS-3c mapping option BN 3035/90.03, or ATM Module Option
BN 3035/90.70
±one internally generated STS-3c tributary signal with the other
three tributaries filled with UNEQ.
Contents of the OC-12/STM-4 overhead bytes
For all bytes except B1, B2 and H1 to H3:
±the content of each byte is statically programmable or a user
defined byte-sequence p in m in n (p frames in m frames and the
entire sequence repeated n times) can be inserted.
For the E1, E2, F1 bytes and the DCC channels
D1 to D3 and D4 to D12:
±Transmission of a test pattern with bit error insertion (see main-
frame for pattern selection)
±Insertion of an external data signal (via the V.11 interface)
For the K1, K2, N1, N2 bytes:
±Insertion of the data signal via the V.11 interface
For the J0 bytes:
±Transmission of a 16-byte sequence, with CRC
Error insertion
Error types ..............................B1andB2parity error
additionally, for STM-4 ................................MS-REI
for OC-12 ................................. REI-L
Triggering
Single errors or error ratio ...................2610
±3
to 1610
±10
for B1 parity errors . . . ......................2610
±4
to 1610
±10
Burst error: m anomalies in n periods
For FAS, B1, B2, B3, REI-L, REI-P ........... m=1to4.8610
6
and
n = 2 to 8001 frames or 0.2 s to 600 s
Alarm generation, dynamic
Alarm types for STM-4 ................... LOF,MS-AIS, MS-RDI
for OC-12 ......................LOF,AIS-L, RDI-L
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 STM-4 ................ MS-AIS, MS-RDI, RS-TIM
for OC-12 .....................AIS-L, RDI-L, TIM-L
Insertion on/off
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