Atec JDSU-ANT-20SE User Manual

Acterna ANT-20SE

Advanced Network Tester ªSpeed Evolutionº± SONET

The test solution that sets the pace in analyzing digital communications systems

Multi-rate transmission testing from DS1 to OC-192

Modular platform offering SONET, DSn, SDH and ATM capabilities

Built-in Pentium PC and Windows 98 user interface for easy processing of test results

Complemented by a lot of easy-access, automated test features

Large, color touchscreen plus graphical results presentation

Prepared for OC-192 upgrade

As digital communications networks expand, the number of network operators is growing too, and not just due to providers merging across boarders. Different networks such as Cellular, CATV and Internet are converging too. Nowadays, customers demand next-to-perfect network availability, and a top-level transmission quality has become a given.

ANT-20SE: A design future-proofed for success

Powerful, precise test capability or simple operation? PDH, SDH, SONET with all bit rates from 1.5 Mbit/s to 10 Gbit/s, or ATM? Don't worry about alternatives! You dont't have to choose. ANT-20SE delivers sophisticated, precision testing that is easy to use even in the most demanding environment for all the above bit rates and for ATM. In addition comprehensive jitter/wander measurements up to OC-48 in complete compliance with the ITU-T Rec. O.172 for comparable, insightful and accurate measurement results.

The remote operation facilities, gives you the opportunity to reduce your costs e.g. operating the instrument from any windows PC via modem or Ethernet LAN. Always ready for new standards, higher bit rates and the intelligent system components of the future the ANT-20SE is at the forefront of network installation and manufacturing applications. Now with the ANT-10Gig a subset of the ANT-20SE, it is taking you one step further allowing the analysis of OC-192/STM-64 signal structures. One outstanding feature of the ANT-20 test solution has always been its ease of

thanks to the very large display and

use, graphical

user interface based on Windows

98. The new ANT-20SE is even better since the size and brightness of the display have been further improved. The high speed access buttons are another useful detail, allowing you to rapidly launch commonly occurring measurements.

Edition: May 2001

Configuration Guide ANT-20SE

SONET

page 3±8

Optic

page 9±12

ANT-20SE ± SONET ± Mainframe BN 3060/02

Extended SONET testing BN 3060/90.02 Add SDH BN 3060/90.04 Drop & Insert/Through mode BN 3060/90.10 M13 Mux/Demux BN 3060/90.12 Mux/Demux 64k/140M BN 3060/90.11 Add BERT SDH BN 3060/90.33

OC-1/3, 1310 nm BN 3060/91.01 OC-1/3, 1310/1550 nm BN 3060/91.02 OC-1/3/12, 1310 nm BN 3060/91.11 OC-1/3/12, 1310/1550 nm BN 3060/91.12 OC-1/3/12/48*, 1310 nm +concatenated BN 3060/90.55 OC-1/3/12/48*, 1550 nm +concatenated BN 3060/90.56 OC-1/3/12/48*, 1310/1550 nm + concatenated BN 3060/90.57

& & & & & &

& & & & & & &

CONC

page 10 ±12

Jitter

page 13±18

ATM

page 19±24

OC-1/3/12, 1310 nm +OC-48, 1550 nm + concatenated BN 3060/90.58

OC-12c BERT BN 3060/90.90 OC-12c ATM BN 3060/90.91 OC-12c virtual concatenation BN 3060/90.92 OC-48c BERT BN 3060/90.93

Jitter/Wander up to 155 Mbit/s BN 3060/91.30 Jitter/Wander up to 622 Mbit/s BN 3060/91.31 Jitter/Wander up to 2.5 Gbit/s BN 3060/91.32 Jitter/Wander at only 2.5 Gbit/s BN 3060/91.33 Jitter at only 2.5 Gbit/s BN 3060/91.34

ATM Basic BN 3060/90.50 ATM Comprehensive (PVC + SVC) BN 3060/90.51 Add ATM SONET BN 3060/90.53

& & & &

& & & & &

& & &

AUTO ± Remote

page 25±26

Add ATM SDH BN 3060/90.52

Automatic Test Sequencer CATS BASIC BN 3035/95.90 Automatic Test Sequencer CATS PROFESSIONAL BN 3035/95.95

* For OC-48 only see chapter optical interface

& &

Specifications ANT-20SE SONET

ANT-20SE Mainframe BN 3060/02

Includes:

Generator and analyzer for electrical STS-1 and STS-3 signals allowing: ± Simulation and evaluation in the TOH / POH ± Generation and analysis of Anomalies and Defects ± Pointer generator and analyzer

Generator and analyzer for bit error rate tests (BERT) at 6 Mbit/s with unframed, 1.5 and 45 Mbit/s with framed and unframed test patterns

VT1.5 mapping (DS1 in STS-1)

Touchscreen

4 extension slots

Ethernet and USB Interface

Generator unit

Digital outputs

Interfaces to Telcordia GR-253, TR-TSY-000499, ANSI T1.102 75 O coaxial output, adapter jack selectable from Versacon 9 adapter system Bit rates and line codes

DS1.............................. 1544 kbit/s; B8ZS, AMI, CMI

DS2................................... 6312 kbit/s; B8ZS, CMI

DS3..................................44736kbit/s; B3ZS, CMI

STS-1 . ...............................51840kbit/s; B3ZS, CMI

STS-3 . ................................... 155520kbit/s; CMI

100 O balanced output, Bantam jack Bit rate and line codes

DS1.............................. 1544 kbit/s; B8ZS, AMI, CMI

Output pulses

DS1....................................... DSX-1 compatible

DS2............................................. rectangular

DS3, STS-1 ............................... HIGH,LOW,DSX-3

Bit rate offset. .....................................+500 ppm

Step size ......................................... 0.001 ppm

Clock

Internal clock generation

at all of the bit rates listed above.

Clock stability ......................................+2 ppm

Synchronisation to external signals

via 100 O balanced input, Bantam jack:

Reference clock . . . . . . . . . . . . . . . . . . . 1544 kHz and 2048 kHz

1544 kbit/s (B8ZS), 2048 kbit/s (HDB3) or

Receive signal

Clock outputs

Clock output at frequency of generator signal, approx. 400 mV (when terminated into 75 O), BNC jack.

STS-3 output signal

Generation of a STS-3 signal conforming to Telcordia GR-253, ANSI T1.105 The STS-3 signal consists of one internal STS-1 tributary signal with the remaining two tributaries filled with UNEQ.

STS-1 output signal

Generation of a STS-1 signal conforming to Telcordia GR-253, ANSI T1.105a

Manual pointer manipulation

or using pre-defined standard sequences

Figure 1: Pointer actions.

Mappings

VT1.5 mapping is included in the basic instrument. Other mappings are added with option ªExtended SONET testingº. Content of the selected tributary:

Framed or unframed DS1 or DS3 test pattern

M13 multiplex signal (with M13 MUX/DEMUX option)

External DS1 or DS3 signal (with D&I option)

Test pattern without stuffing bits (bulk signal to O.181)

Content of non-selected tributaries ............. framed PRBS 2

The various mappings are described along with the options.

±1

Generation of Pointer actions (figure 1)

Generation of pointer actions at the STS-1 and VT levels simultaneously.

Pointer sequences to T1.105.03 with programmable spacing

Pointer increment/decrement (continuously repeated)

Single pointer

Pointer value setting with or without NDF

Contents of TOH and POH bytes

The content of all bytes with the exception of B1/B2/B3 and H1 to H4 is programmable with any byte or a user defined bytesequence p in m in n (p frames in m frames and the entire sequence repeated n times) can be inserted. Bytes E1, E2, F1, F2, and byte groups D1 to D3 and D4 to D12:

Transmission of a PRBS test pattern with bit error insertion

(see test patterns)

Insertion of an external data signal via V.11 interface (also for K1

and K2)

Trace identifier

J0,J1,J2 ..........programmable 16 byte ASCII sequence with CRC

J1, J2, additionally ...........programmable 64 byte ASCII sequence

H4 byte .................................4or48bytesequence

Error insertion

Error types .............................B1,B2,B3parity errors,

Triggering

Single error or error ratio ................... 2610

for B1, B3, REI-P . . . ..................... 2610±4to 1610

for bit errors . ............................ 1610±2to 1610

Step size for mantissa and exponent ........................... 1

Burst error: m anomalies in n periods

For FAS, B1, B2, B3, REI-L, REI-P ..............m=1to4.86610

frame alignment signal errors, REI-L,

REI-P, bit errors in test pattern,

code errors (single errors)

±3

to 1610

and n = 2 to 8001 frames or 0.2 s to 600 s

±10

±9

Alarm generation, dynamic

Alarm types .................... LOS,LOF,AIS-L, RDI-L, LOP-P,

AIS-P, UNEQ-P, PLM-P, RDI-P, RDIEPP,

RDIEPS, RDIEPC, PDI-P

Input levels

DS1....................................... DSX-1 compatible

DS3, STS-1 ............................... HIGH,LOW,DSX-3

Clock recovery pulling range .........................+500 ppm

m alarms in n frames . . ................ m=1ton±1,n

or t1 alarm active,

t2 alarm passive .....................t1=0to60s,t2=0to600s

max

= 8000

Alarm generation, static (on/off)

Alarm types .................... LOS,LOF,AIS-L, TIM-L, RDI-L,

LOP-P, AIS-P, UNEQ-P, PLM-P, TIM-P,

RDI-P, RDIEPP, RDIEPS, RDIEPC, PDI-P

DS1, DS2 and DS3 output signals

Signal structures

Unframed test pattern

Framed test pattern (only DS1, DS3)

DS1 frame structure . . ................................ SF,ESF

DS3 frame structure . . . ...........................M13,Cparity

Error insertion

Bit errors in test pattern ....................error rate, single error

BPV............................................. single error

DS1Fbit(LOF).................. single error, 2 in 4, 2 in 5, 2 in 6

CRC-6 (ESF) ............................ single error, error rate

DS3Fbit(LOF)........... single error, 2 in 2, 2 in 3, 3 in 3, 3 in 15,

P parity, CP parity, FEBE ................... single error, error rate

Error rate .................................1610

Alarm insertion

DS1...................................... LOF,AIS, YELLOW

DS3........................... LOF,AIS, YELLOW, IDLE, FEAC

FEAC Far-End Alarm and Control Signals

To test that FEAC alarm and status information is correctly transmitted, the relevant signal codes can be selected and inserted into the DS3 C-bit frame format.

Test patterns

Pseudo-random bit sequences

PRBS: 2 2

Programmable word

Length .............................................. 16bits

±1, 215±1, 220±1, QRSS 20, 211±1 inv., 215±1 inv., 220±1 inv.,

±1 inv.

3in16,3in17

±2

to 2610

±9

Selectable input gain, CMI coded ..................... 15to23dB

B3ZS, B8ZS, HDB3, AMI coded ...................... 15to26dB

Selectable adaptive equalizers for DS3, STS-1 .................450ft

Monitor input for STS-3 and STS-12 NRZ signals See chapter Optical Interfaces for details.

DS1 .....................1310 ft

STS-3 receive signal

(for signal structure, see under generator unit) The ANT-20 demultiplexes one selectable STS-1 tributary from STS-3 and feeds it to the internal processor for evaluation.

STS-1, DS1 and DS3 receive signals

Signal structures as for generator unit

Trigger output

75 O BNC connector, HCMOS signal level Pulse output for received bit errors, transmit frame trigger, transmit pattern trigger or 2048 kHz reference clock

Included mapping

VT1.5 and STM-0 mapping DS1 in STS-1 and 1.5 Mbit/s in STM-0

Modes ................ asynchronous, byte synchronous (floating)

Error insertion and measurement

Additional error types . ........................... BIP-V,REI-V

Alarm generation, dynamic

Alarm types................ LOP-V,AIS-V, LOM, UNEQ-V, RDI-V,

m alarms in n frames . . ................ m=1ton±1,n

or t1 alarm active,

t2 alarm passive .....................t1=0to60s,t2=0to600s

Alarm generation, static (on/off) and evaluation

Alarm types .............................. LOP-V,AIS-V, LOM,

Alarm detection only . . ................................ NDF-V

RDIEVP, RDIEVS, RDIEVC, RFI-V, PDI-V, PLM-V

UNEQ-V, PLM-V, TIM-V, RDI-V, RDIEVP,

RDIEVS, RDIEVC, RFI-V

max

= 8000

Receiver unit

Digital inputs

Interfaces to ....... Telcordia GR-253, TR-TSY-000499, ANSI T1.102

75 O coaxial input; adapter jack selectable from Versacon 9 adapter system Bit rates and line codes

DS1.............................. 1544 kbit/s; B8ZS, AMI, CMI

DS2................................... 6312 kbit/s; B8ZS, CMI

DS3................................. 44736kbit/s; B3ZS, CMI

STS-1 . ...............................51840kbit/s; B3ZS, CMI

STS-3 . ................................... 155520kbit/s; CMI

100 O balanced input, Bantam jack Bit rate and line codes

DS1...............................1544 kbit/s; B8ZS, AMI, CMI

Automatic modes

Autoconfiguration

Automatically sets the ANT-20 to the input signal. The routine searches at the electrical and optical interfaces for the presence of standard asynchronous and STS-N/OC-N signals (GR-253, ANSI T1.102) and the payload contents in channel 1.

Automatic SCAN function

The SCAN function permits sequential testing of all VT1.5 or VT2 channels in a SONETsignal. The ANT-20SE receiver checks for alarms in the receive signal, the SONETstructure and all channels and for synchronization of the selected test pattern in all channels. The results (OK/not OK) for each channel are entered in a matrix. The generator runs simultaneously and can be used to stimulate the device under test.

An OK result indicates that the corresponding channel contains the signal searched for. Only the receive channels are switched during a SEARCH.

Measurement types

Error measurements

Error types .............................B1,B2,B3parity errors,

Additionally, for

DS1............................................. CRCerrors

DS3...................... P-parity errors, CP-parity errors, FEBE

Error Count, Error Rate, Intermediate Errors

Performance analysis

ES, SES, EFS, SEFS, UAS are evaluated

frame errors, REI-L, REI-P,

bit errors in test pattern, BPV

Figure 2: Trouble scan.

Automatic TROUBLE SCAN function (Figure 2)

The TROUBLE SCAN function permits sequential testing of all VT1.5 or VT2 channels in a SONET signal. The ANT-20SE receiver checks for alarms in the receive signal, the SONET structure and all channels. The results (OK/not OK) for each channel are entered in a matrix. A detailed alarm history can be displayed by selecting a channel from the matrix. Only the receive channels are switched during a TROUBLE SCAN.

AutoScan function (Figure 3)

This automatic ªAutoScanº function allows you to rapidly check the signal structure, the mapping used, the trace identifier and the payload ± even with mixed mapped signals. The ANT-20SE receiver analyzes the incoming received signal and provides a clear overview of all the signals present in the composite receive signal. The variable scan depth setting allows even complex signal structures to be resolved and displayed clearly. All the displayed results can be printed out.

Automatic SEARCH function

Channel shifts in the payload may occur when measuring complex network elements, depending on the configuration of the device under test. The SEARCH function permits rapid automatic location of the test channel (VT1.5 or VT2 with defined PRBS) in the payload of a SONET signal. The ANT-20SE receiver checks for alarms in the receive signal, the SDH structure and all channels, and for synchronization of the selected test pattern in all channels. The results (OK/not OK) for each channel are entered in a matrix.

In-service measurements (ISM)

Simultaneous ISM of the near-end and far-end of a selected path

Near-end . . . . . . . . . . . . . . . . . . . . . . . B1, B2, B3, BIP-V, CRC-6

Far-end . . . . . . . . . . . . . . . . . . . . . . . . . . . . REI-L, REI-P, REI-V

DS1, DS3 events ..................... Fbit, parity, FEBE, C parity

Out-of-service measurements (OOS)

OOS evaluation using bit errors in test pattern

Analysis of STS-1 and VT pointer actions (Figure 4)

Display of

Number of pointer operations: Increment, Decrement, Sum (Increment + Decrement), Difference (Increment ± Decrement)

Pointer value

Clock frequency measurement

The deviation of the input signal clock frequency from the nominal frequency is displayed in ppm.

Figure 4: Graphic pointers. Display showing additional evaluation of cursor position.

Figure 3: AutoScan.

Delay measurement

Delay measurements are used for aligning satellite hops and testing the maximum permitted delay times for storage exchange and cross-connect systems and for checking the loop circuits in regenerators. The ANT-20SE measures the time taken to transmit the test pattern from the generator through the section under test and back to the receiver. The measurement is made on the test patterns in a selected channel, or in the tributaries (SONET; bulk signal or asynchronous), or on the selected channel of the lowest hierarchy level of asynchronous multiplex systems. To avoid ambiguities in the measurement, two measurement times are provided.

Measurement range

Bit rates from 34 to 155 Mbit/s ........................1msto1s

Bit rate 1.5 Mbit/s ................................. 10msto5s

Alarm detection

All alarms are evaluated and displayed in parallel

Alarm types ...................................LOS,OOF,LOF

Additionally, for STS . . ...............AIS-L, RDI-L, AIS-P, LOP-P,

NDF-P, RDI-P, UNEQ-P, TIM-P, PLM-P

Additionally, for DS1, DS3 ..............LSS, AIS, RAI (YELLOW),

IDLE (DS3), FEAC (DS3)

Figure 5: Histogram results display.

TOH and POH evaluation

Display of complete TOH and POH, e.g. interpretation of

APS information in K1 and K2

For the bytes E1, E2, F1, F2 and byte groups D1 to D3 and D4 to D12:

BERT using test pattern from the generator unit

Output of the data signal via the V.11 interface (also for K1, K2,

K3, N1 and N2)

For the Trace Identifier

J0 . . . . . . . . . . . . . . . . . . . . . . display of 16 byte ASCII sequence

J1, J2 . . . . . . . . . . . . . . . . display of 16 or 64 byte ASCII sequence

Measurement interval

Variable ...................................1second to 99 days

Measurement start .................... manual or automatic timer

Measurement stop ....................manual or automatic timer

(user setting)

Memory for errors, pointer operations and alarms

Resolution of error events and pointers . ...................... 1s

Alarm resolution ......................................100ms

Off-line analysis software

The software runs on standard PCs and permits comprehensive analysis of stored ANT-20SE results. After loading the results, the ANT-20SE settings during the measurement and the stored results can be accessed. Zoom and filter functions allow detailed evaluations. The processed results can be exported in CSV format for importing into other programs such as MS Excel or MS Word for Windows for producing documentation.

Graphical display (histogram) (Figure 5)

Display of errors, pointer operations / values and alarms as bargraphs vs. time

Units, time axis ..............................seconds, minutes,

15 minutes, hours, days

Tabular display

Display of all alarm and error events with time stamp

Result printout

ANT-20SE supports a variety of dot-matrix, inkjet and laser printers (Windows Print Manager)

Printer interfaces

Serial . .......................................... V.24/RS232

Parallel ........................... Centronics/EPP/IEEE P 1284

Result export

Results are stored in a database and can be processed using standard PC software

Instrument operation

ANT-20SE is operated using the standard MicrosoftâWindows graphical user interface. Operation is menu-controlled using the touchscreen. A mouse can also be connected if desired.

Application selection and storage

ANT-20SE includes an applications library to which customer-specific applications can be added. All applications are stored internally on the built-in hard disk drive and can be copied to any other ANT-20SE via floppy disk or super disk. Easy to use filter functions allow quick selection of the desired application.

Results display and instrument operation

Numerical display

Display of absolute and relative values for all error types

Intermediate results . . . .......................every 1 s to 99 min

Touchscreen display

A large display screen is available for the ANT-20SE:

Color TFT screen ..............................10.4@, 256 colors

Resolution ..................... 6406480 pixels (VGA standard)

The touchscreen allows very easy point and shoot operation.

Built-in PC

ANT-20SE uses a Pentium PC as internal controller so that standard PC applications can also be run on the instrument.

RAM capacity ........................................64MB

LS-120 drive .................................... 3.5@, 120 MB

Hard disk drive ........................................ 6GB

USB interface, 10/100 Mbit/s Ethernet interface are included.

Keyboard

Full keyboard for text input, extended PC applications and future requirements. The keyboard is protected by a fold back cover. An additional connector is provided for a standard PC keyboard.

External display connector

Simultaneous display with built-in screen

Interface ...................................... VGAstandard

PCMCIA interface

Type ............................ PCMCIA2.1typesI,IIandIII

The PCMCIA interface provides access to GPIB, LANs, etc., via adapter cards.

Byte capture TOH and POH

To analyze the TOH/POH functions, it is necessary to capture individual bytes vs. time, allowing detection of errors or short-term changes with frame level precision. The Capture function is started by a selectable trigger. Values for a selected byte are stored and can be accessed subsequently in a table of values. Particularly in capturing the APS sequences, the bytes (K1, K2) are displayed as an abbreviation of the standard commands. The function also allows recording of the N1 or N2 bytes for evaluation of ªTandem Connectionº information. H4 sequences can also be analyzed very easily. The results can be printed or exported.

Capture bytes for STS-1/-3/-3c, el. & opt ........ allTOH/POH bytes

OC-Nel.&opt............. allTOH/POH bytes,

channel 1 except A1, A2, B1

Storage depth for a byte .................................. 266

K1,K2 .................................. 200

Trigger events ................. AIS-L, AIS-V, AIS-P, RDI-L, LOP-P,

editable value in trigger byte

Capture resolution ............................. frame precision

Power outage function

In the event of an AC line power failure during a measurement, ANT-20SE saves all data. As soon as the AC line voltage is reestablished, the measurement is resumed. Previous results are retained and the time of the power failure is recorded along with other events.

General specifications

Power supply (nominal range of use) AC line voltage,

automatic switching . . ............. 100to127Vand220to240V

AC line frequency ...................................50/60 Hz

Power consumption (all options fitted) . .............. max.500VA

Safety class to IEC 1010-1 ............................... Class I

Ambient temperature

Nominal range of use . ........... 41Fto104 F (+5 C to + 40 C)

Storage and transport range ...... ±4Fto158 F (± 20 C to +70 C)

Dimensions (w6h6d)inmm ........... approx. 32063506280

in inches ......... approx. 12.66 13.8611

Weight ................................... approx. 15 kg/22 lb

APS time measurement

In synchronous networks, a defined maximum switch-over time is necessary for the traffic in case of a fault. To verify compliance with this requirement, the ANT-20SE measures the switch-over time with 1 ms resolution. The result can be printed.

Criteria for the time measurement ............ AIS-L, AIS-V, AIS-P,

Max. measurable switch-over time ........................... 2s

Resolution ...................... ......................1ms

Allowable error rate for user signal .................... 52610

bit error

±4

Add SDH BN 3060/90.04

BERT (2, 8, 34, 140 Mbit/s)

Signal structure and interfaces for generator and receiver: Framed and unframed test patterns Additionally, for coaxial input/output

Bit rate, line code .................2048, 8448, 34 368 kbit/s, HDB3

Bit rate, line code ...........................139264kbit/s, CMI

Additionally, for balanced input/output

Bit rate, line code ............................2048 kbit/s, HDB3

C4 mapping (140 Mbit/s in STM-1 and STS-3c)

See ANT-20SE SDH datasheet for details.

Options

Extended SONET testing BN 3060/90.02

VT6 SPE mapping

(6 Mbit/s unframed/Bulk in STS-1)

STS-1 SPE and STM-0 mapping

Errors and alarms as for mainframe instrument

VT2 SPE and STM-0 mapping

E1 in STS-1 and 2 Mbit/s in STM-0

Modes ................ asynchronous, byte synchronous (floating)

Error insertion and alarm generation as for VT1.5 SPE mapping.

STS-3c mapping

(140 Mbit/s in STS-3c and STM-1)

C11 mapping (1.5 Mbit/s in STM-1, AU-3/AU-4)

See ANT-20SE SDH datasheet for details.

C12 mapping (2 Mbit/s in STM-1, AU-3/AU-4)

See ANT-20SE SDH datasheet for details.

C3 mapping (34 Mbit/s in STM-1, AU-3/AU-4)

C3 mapping (45 Mbit/s in STM-1, AU-3/AU-4)

See ANT-20SE SDH datasheet for details.

C2 mapping (6 Mbit/s unframed/Bulk in STM-1)

See ANT-20SE SDH datasheet for details.

Drop & Insert BN 3060/90.10

This option provides the following functions:

1. Generator and receiver operate independently

as mapper and demapper. The DS1/DS3 signal from a selected

channel is dropped from the receive signal and output to a

connector. An external or internal DS1/DS3 signal is inserted into

the transmit signal.

M13 MUX/DEMUX chain BN 3060/90.12

M13 multiplexers are used in North America in hybrid networks and synchronous system cross-connects. This option provides n6DS0 to DS3 multiplex and demultiplex functions. The output signal is fed to the electrical interface and is available as payload in mappings (requires options BN 3060/90.02 or BN 3060/90.04). Alarms and errors can be generated and analyzed.

OC-M/STM-N e/o

Asynchronous tributary

OC-M/STM-N e/o

2. Through mode:

The received signal is looped through the ANT-20SE and re-

transmitted (generator and receiver coupled). The DS1/DS3 signal

from a selected channel may be dropped from the receive signal and

output to a connector. An internal DS1/DS3 signal may be inserted

into the transmit signal. The ANT-20SE can operate here as an active

signal monitor without affecting the signal.

OC-M/STM-N e/o

Asynchronous tributary

OC-M/STM-N e/o

3. Through mode jittering:

The looped-through DS1/DS3 or SONET signal can also be jittered

using the Jitter Generator option. This applies to all jitter

frequencies up to 622 Mbit/s depending on the jitter option fitted.

Jitter

OC-M/STM-N e/o

W-DCS

OC-N

DS1

MUX M13

DS1

Built-in

M13 MUX/DEMUX

OC-N

DS3

DS1

DS3/DS1

Cross connect

DS3

DS1

OC-N

DS1, VT1.5

Figure 6: Testing hybrid systems with M13 MUX/DEMUX.

64k/140M MUX/DEMUX chain BN 3060/90.11

This option provides n664 kbit/s to 140 Mbit/s multiplex and demultiplex functions. The output signal is fed to the electrical interface (requires option BN 3060/90.04) and is available as payload in mappings (requires option BN 3060/90.04). Alarms and errors can be generated and analyzed.

Asynchronous tributary

4. Error insertion in through mode:

The looped-through synchronous signal can be manipulated if

required:

± Overwriting bytes in the TOH

(except B1, B2, H1 to H3) ± Anomaly insertion ± Defect generation by programming the TOH

Error/Alarm

OC-M/STM-N e/o

Asynchronous tributary

5. Block and Replace (B & R)

For this function, the ANT-20SE is looped into the working fiber of a ring. B&R allows replacement of a synchronous tributary (e.g. STS-1 including TOH, POH and payload) in a OC-N signal. This can then be measured by the ANT-20SE from the ring. By inserting specific errors, the error thresholds of the APS mechanism in the system can be tested.

Additional input and output for tributary signals 75 O, coaxial BNC; line codes as for mainframe instrument

Input and output for balanced tributary signals: Use balanced

connectors on mainframe

OC-M/STM-N e/o

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. The STM-0 optical interface requires the option ªAdd SONETº.

Optical Modules up to 155 Mbit/s

Optical OC-1/3, STM-0/1, 1310 nm BN 3060/91.01

Optical OC-1/3, STM-0/1, 1310& 1550 nm BN 3060/91.02

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 two options for adapting to the required wavelength:

Wavelength ........................................1310 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-20SE 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 3060/91.11

Optical OC-1/3/12, STM-0/1/4, 1310& 1550 nm BN 3060/91.12

Bit rate of TX and

RX signal.......................... 155520kbit/s, 622 080 kbit/s

additionally, for STS-1/STM-0 mappings ...........51840kbit/s

Line code..................................... scrambled NRZ

There are two options for adapting to the required wavelength:

Wavelength ........................................1310 nm,

Output level ................................. 0dBm+2/±3dB

with 1310 & 1550 nm option ................. 0dBm+2/±3.5dB

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

one internally generated STS-3c tributary signal with the other three tributaries filled with UNEQ (with STS-3c mapping option or ATM Basic Option BN 3060/90.50).

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.

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 mainframe 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 OC-12 ................................. REI-L

Triggering

Single errors or error ratio ................... 2610

for B1 parity errors ..........................2610±4to 1610

Burst error: m anomalies in n periods

For FAS, B1, B2, B3, REI-L, REI-P . . . ...... m=1to4.86106 and

Alarm generation, dynamic

Alarm types for OC-12 .......................LOF,AIS-L, RDI-L

m alarms in n frames . . ................. m=1ton-1, n

t1 alarm active, t2 alarm passive .................... t1=0to60s,

forSTM-4................................MS-REI

forSTM-4 ................... LOF,MS-AIS, MS-RDI

1310 & 1550 nm (switchable in the instrument)

±3

to 1610

n = 2 to 8001 frames or 0.2 s to 600 s

t2 = 0 to 600 s

max

±10

= 8000

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.

Alarm generation, static (on/off)

Alarm types ....................................... LOS,LOF

additionally, for OC-12 .....................AIS-L, RDI-L, TIM-L

forSTM-4................ MS-AIS, MS-RDI, RS-TIM

Insertion on/off

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