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Wavetek ANT-20 Operating Manual

Advanced network tester
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ANT-20, ANT-20E
Advanced Network Tester
Concatenated Mappings
OC-12c/STM-4c
OC-48c/STM-16c
BN 3035 /90.90 bis 3035/90.93
Software Version 7.20
Operating Manual
10

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  • Page 1 ANT-20, ANT-20E Advanced Network Tester Concatenated Mappings OC-12c/STM-4c OC-48c/STM-16c BN 3035 /90.90 bis 3035/90.93 Software Version 7.20 Operating Manual...
  • Page 2 Please direct all enquiries to your local Wavetek Wandel Goltermann sales company. The addresses are given at the end of this handbook. Copyrights This product or parts of it are based upon Recommendations and/or Standards of the Standardization Sector of the International...

  • Page 3: Table Of Contents

    ANT-20/ANT-20E Concatenation Options Contents Introduction Concatenation options........I-1 OC-12c/STM-4c options .
  • Page 4 Concatenation Options ANT-20/ANT-20E 1.3.4 VC-4c path overhead (POH), high-order ....S-4 1.3.4.1 Contiguous concatenation (VC-4-4c) ....S-4 1.3.4.2...
  • Page 5 ANT-20/ANT-20E Concatenation Options 2.3.5 Defect detection ....... . . S-19 Payload .
  • Page 6 Concatenation Options ANT-20/ANT-20E Payload generation ....... S-35 1.4.1 BULK signal generator ......S-35 1.4.1.1...
  • Page 7 ANT-20/ANT-20E Concatenation Options 2.4.2 ATM receiver section......S-46 2.4.2.1 Descrambling ........S-46 2.4.2.2...

  • Page 8: Concatenation Options

    Concatenation Options ANT-20/ANT-20E Notes:...

  • Page 9: Introduction

    • OC-12v/STM-4v VIRTUAL CONCATENATION (BN 3035/90.92) The “OC-12c/STM-4c ERROR TEST (BULK)” option can be used to test the performance of transmission paths. All of the ANT-20 analyzers can be used at the same time. Overhead Analyzer, Pointer Analyzer, Anomaly/Defect Analyzer, Jitter Analyzer and Performance Analysis allow correlation of the measurement results.

  • Page 10: Oc-48C/Stm-16C Options

    The “OC-12c/STM-4c ERROR TEST (BULK)” option and the “OC-48c/STM-16c ERROR TEST (BULK)” option can be used to test the performance of transmission paths. All of the ANT-20 analyzers can be used at the same time. Overhead Analyzer, Pointer Analyzer, Anomaly/Defect Analyzer, Jitter Analyzer and Performance Analysis allow correlation of the measurement results.

  • Page 11: Applications

    ANT-20/ANT-20E Concatenation Options Applications OC-12c/STM-4c The “OC-12c/STM-4c” options expand the applications of the virtual instruments (VI) of the ANT-20 to include the following signal structures: • STS-12c SPE Contiguous Concatenation • STS-12v SPE Virtual Concatenation • VC-4-4c Contiguous Concatenation • VC-4-4v Virtual Concatenation These signals have a payload bit rate of 599.040 Mbit/s.

  • Page 12: Oc-12C/Stm-4C

    Concatenation Options ANT-20/ANT-20E The “OC-12v/STM-4v VIRTUAL CONCATENATION” option expands all test functions for bulk signal and cell mapping. By combining the “OC-12c/STM-4c ATM TESTING” option with the ATM module and the “Jitter Generator/Analyzer 622 Mbit/s”, it is possible to demonstrate the conformance of ATM network elements to the jitter requirements of ITU-T, Bellcore and ANSI.

  • Page 13: Oc-12C/Stm-4C Atm Testing (Contiguous Concatenation Mapping

    Concatenation Options 2.1.2 OC-12c/STM-4c ATM TESTING (Contiguous Concatenation Mapping) The “OC-12c/STM-4c ATM TESTING” option expands the “ATM Module” option (BN 3035/ 90.70) for the ANT-20 to allow ATM tests at 622 Mbit/s. Fig. I-3 Contiguous concatenation, OC-12c/STM-4c ATM TESTING 2.1.3 OC-12v/STM-4v VIRTUAL CONCATENATION (Virtual Concatenation Mapping) The “OC-12v/STM-4v VIRTUAL CONCATENATION”...

  • Page 14: Oc-48C/Stm-16C

    Delta pointer actions can be directly set in the ANT-20 Pointer Generator to offset all four pointers of the concatenated container. In this way, termination in the interface modules of network elements can be tested.
  • Page 15 ANT-20/ANT-20E Concatenation Options Fig. I-6 Contiguous concatenation, STS-12c SPE or VC-4-4c in OC-48c or STM-16c The “Signal Structure” VI can be used to set the appropriate mapping for concatenated containers for the transmitter (Tx) and receiver (Rx). The following VIs can be used for tests after the settings are made: •...

  • Page 16: Oc-48C/Stm-16C Error Test (Bulk); (Contiguous Concatenation Mapping

    Concatenation Options ANT-20/ANT-20E 2.2.1 OC-48c/STM-16c ERROR TEST (BULK); (Contiguous Concatenation Mapping) The “OC-48c/STM-16c ERROR TEST (BULK)” option is used to additionally analyze the bit error ratio for concatenated containers in accordance with ITU-T O.150. A selectable pseudo- random bit sequence is mapped into the concatenated container for this measurement.

  • Page 17: Oc-12C/Stm-4C Atm Testing (Contiguous Concatenation Mapping

    OC-12c/STM-4c ATM TESTING (Contiguous Concatenation Mapping) The “OC-12c/STM-4c ATM TESTING” option expands the “ATM Module” option (BN 3035/ 90.70) for the ANT-20 to allow ATM tests at 622 Mbit/s. Fig. I-9 Contiguous concatenation and ATM tests, STS-12c/VC-4c in OC-48c or STM-16c...

  • Page 18: Operation

    4: • Pointer Analyzer • Pointer Generator • Overhead Analyzer • Overhead Generator • Signal Structure For ATM applications, additions are found in file section 8 of the ANT-20 Options File. I-10 Introduction...

  • Page 19: Specifications Oc-12C/Stm-4C

    ANT-20/ANT-20E Concatenation Options Specifications OC-12c/STM-4c These specifications apply to the following options: OC-12c/STM-4c mapping OC-12c/STM-4c ERROR TEST (BULK)....... .BN 3035/90.90 OC-12c/STM-4c ATM TESTING.

  • Page 20: Clock Generation And Bit Rates

    Concatenation Options ANT-20/ANT-20E Clock generation and bit rates 1.2.1 Clock generation See “Specifications” for the mainframe instrument. 1.2.2 Bit rate OC-12c/STM-4c........... 622.08 Mbit/s SDH and SONET Tx signals •...

  • Page 21: Overhead Generation

    ANT-20/ANT-20E Concatenation Options 1.3.3 Overhead generation 1.3.3.1 Section overhead (SOH), Transport overhead (TOH) Standard OC-12c/STM-4c overhead (hex) S O H, TOH –– –– –– –– –– –– –– –– –– –– –– –– –– –– –– –– –– –– ––...

  • Page 22: Vc-4C Path Overhead (Poh), High-Order

    Concatenation Options ANT-20/ANT-20E Contents of SOH bytes • Static bytes: All except B1, B2, H1, H2, H3 • Overhead sequence m, n, p: All except B1, B2, H1, H2, H3 • Trace Identifier: J0 (length = 16 frames with CRC7 formation) •...

  • Page 23: Contiguous Concatenation

    ANT-20/ANT-20E Concatenation Options 1.3.4.2 Virtual concatenation (VC-4-4v) Only with option BN 3035/90.92 Standard overhead POH byte POH #1 POH #2 to #4 J1 (ASCII) “WG HP-TRACE” “00” B3 (hex) Inserted through parity formation C2 (hex) “13” for ATM mapping “13” for ATM mapping “FE”...

  • Page 24: Virtual Concatenation

    Concatenation Options ANT-20/ANT-20E Pointer jumps Pointer jump from pointer value A to pointer value B (including setting a new pointer). Pointer jumps are executed using NDF. Pointer range A + B: AU-4 ............. . . 0 to 782 1.3.5.2...

  • Page 25: Anomaly Insertion

    ANT-20/ANT-20E Concatenation Options Fig. S-1 Pointer actions 1.3.6 OC-12c/STM-4c anomaly insertion Anomaly insertion ......... . B1, B2, B3 parity errors REI-L/MS-REI, REI-P/HP-REI Trigger modes .
  • Page 26 Concatenation Options ANT-20/ANT-20E Anomaly Single Rate B1 (OC-12c, STM-4c) 2E-4 to 1E-10 B2 (OC-12c, STM-4c) 2E-3 to 1E-10 REI-L (OC-12c) 2E-3 to 1E-10 MS-REI (STM-4c) (STS-12c SPE/VC-4-4c) 2E-4 to 1E-10 REI-P (STS-12c SPE) 2E-4 to 1E-10 HP-REI (VC-4-4c) 1 Mantissa: 1 to 9, Exponent: -1 to -10 (integer values) 2 Virtual concatenation: Single: POH #1;...

  • Page 27: Oc-12C/Stm-4C Defect Generation

    ANT-20/ANT-20E Concatenation Options 1.3.7 OC-12c/STM-4c defect generation Defect Sensor function test Sensor threshold test On/Off M in N |---t1---| |------t2------| LOS (optical) M = 800 to 7200 t1 = 0.1 to 60.0 s N = 1600 to 8000 t2 = 0.2 to 600 s...

  • Page 28: Payload Generation

    Concatenation Options ANT-20/ANT-20E Payload generation 1.4.1 BULK signal generator Only with option BN 3035/90.90 1.4.1.1 Payload Bit rate ............599.04 Mbit/s Structure .

  • Page 29: Atm Generator Section

    ANT-20/ANT-20E Concatenation Options 1.4.2 ATM generator section Only with options BN 3035/90.70 (ATM Module) and BN 3035/90.91 1.4.2.1 Scrambling Scrambling is according to ITU-T Recommendation I.432 (X +1). The function can be disabled. 1.4.2.2 Anomaly insertion The following anomalies can be inserted in addition to those described in Sec. 1.3.6, Page S-7.

  • Page 30: Defect Generation

    Concatenation Options ANT-20/ANT-20E 1.4.2.3 Defect generation The following defects can be generated in addition to those described in Sec. 1.3.7, Page S-9. Defect Sensor function test Single On / Off VP-AIS VP-RDI VC-AIS VC-RDI Vx-AIS Vx-RDI 1 LCD (Loss of Cell Delineation) is generated by uncorrectable header errors in ≥ 7 consecutive cells.

  • Page 31: Background Load

    ANT-20/ANT-20E Concatenation Options Equidistant load profile setting range Cell spacing ..........4 to 40000 cell periods Maximum cell spacing deviation.

  • Page 32: Receiver Section

    Jitter amplitude 20 dB / decade Jitter frequency Fig. S-2 Jitter amplitude versus jitter frequency Bit rate Mbit/s UIpp UIpp 51.840 0.15 155.520 0.15 1300 622.080 0.15 5000 Table S-9 ANT-20 tolerance to jitter at system bit rates S-14 Specifications OC-12c/STM-4c...

  • Page 33: Signal Input [16], Electrical

    ANT-20/ANT-20E Concatenation Options 2.1.2 Signal input [16], electrical Connector ..........unbalanced (coaxial) Socket type.

  • Page 34: Measurement Modes

    Concatenation Options ANT-20/ANT-20E Measurement modes 2.3.1 Evaluation of section overhead (SOH), transport overhead (TOH) Display Complete SOH, TOH: (four channel-associated part SOH) ....hexadecimal Trace Identifier J0 (STS-12c SPE/VC-4-4c) .

  • Page 35: Virtual Concatenation

    ANT-20/ANT-20E Concatenation Options Evaluation Bit error rate test using pseudo-random bit sequence PRBS11........F2...

  • Page 36: Anomaly Measurements

    Concatenation Options ANT-20/ANT-20E Display • Number of AU pointer operations (pointer #1 in virtual concatenation): Increments, decrements, sum of increments + decrements, difference of increments - decrements • Pointer address (pointer #1 in virtual concatenation) • Number of NDF events (pointer #1 in virtual concatenation) •...

  • Page 37: Defect Detection

    ANT-20/ANT-20E Concatenation Options Display Anomalies are indicated by LEDs: CURRENT LED (red) is on while the anomaly is present. HISTORY LED (yellow)is on if the anomaly occurred at least once or is still present during the current measurement interval. Anomaly...
  • Page 38 Concatenation Options ANT-20/ANT-20E Defect LOS (optical) LOF-622 LOF/OOF TIM-L (OC-12c) RS-TIM (STM-4c) AIS-L (OC-12c) MS-AIS/AIS-L MS-AIS (STM-4c) RDI-L (OC-12c) MS-RDI/RDI-L MS-RDI (STM-4c) LOP-P (STS-12c SPE) AU-LOP/LOP-P AU-LOP (VC-4-4c) LOP-Cx AU-LOP/LOP-P AIS-P (STS-12c SPE) AU-AIS/AIS-P AU-AIS (VC-4-4c) AIS-Cx AU-AIS/AIS-P AU-LOP/LOP-P DPOVC...

  • Page 39: Payload

    ANT-20/ANT-20E Concatenation Options Payload 2.4.1 BULK signal receiver Only with option BN 3035/90.90 2.4.1.1 Bit pattern payloads See Sec. 1.4.1.1, Page S-10 and Sec. 1.4.1.2, Page S-10 2.4.1.2 Anomaly measurements The following anomaly can be indicated and evaluated in addition to the anomalies described in Sec.

  • Page 40: Measurement Modes

    Concatenation Options ANT-20/ANT-20E 2.4.2.2 Measurement modes 2.4.2.3 Anomaly measurements The following anomalies can be indicated and evaluated in addition to the anomalies described in Sec. 2.3.4, Page S-18. Anomaly Explanation HCOR Correctable Header Error HUNC Uncorrectable Header Error Cell Error Ratio...

  • Page 41: Atm Performance Measurements

    ANT-20/ANT-20E Concatenation Options 2.4.2.5 ATM performance measurements Error-related performance parameters The measurements are made using test cells. Results Lost Cell Count, Cell Loss Ratio..........CLR Misinserted Cell Count, Cell Misinserted Rate .
  • Page 42 Concatenation Options ANT-20/ANT-20E Peak cell rate The measurement is made in the test channel. Measurement interval ............1 s Resolution .

  • Page 43: Aal-1 Reassembly

    ANT-20/ANT-20E Concatenation Options 2.4.3.1 AAL-1 reassembly AAL-1 structured cells are reassembled from the SAR-PDU. The format is shown in the figure below. The TSE measurement is performed using framed or unframed pseudo-random bit sequences (PRBS) mapped into the SAR-PDU payload.
  • Page 44 Concatenation Options ANT-20/ANT-20E Notes: S-26 Specifications OC-12c/STM-4c...

  • Page 45: Specifications Oc-48C/Stm-16C

    ANT-20/ANT-20E Concatenation Options Specifications OC-48c/STM-16c These specifications apply to the following options: OC-48c/STM-16c mappings OC-12c/STM-4c ERROR TEST (BULK)....... .BN 3035/90.90 OC-12c/STM-4c ATM TESTING.

  • Page 46: Signal Output [46], Electrical

    Concatenation Options ANT-20/ANT-20E 1.1.2 Signal output [46], electrical Connector ..........unbalanced (coaxial) Socket .

  • Page 47: Sdh And Sonet Tx Signals

    ANT-20/ANT-20E Concatenation Options SDH and SONET TX signals • Generates an OC-48c signal conforming to the Bellcore-GR-253 standards. • Generates an STM-16c signal conforming to ITU-T recommendation G.707. 1.3.1 OC-48c/STM-16c TX signals OC-48c/STM-16c signal formation: • Internally generated signal: The payload in 4 x STS-12c SPE/VC-4-4c contains a “Bulk”...

  • Page 48: Overhead Generator

    Concatenation Options ANT-20/ANT-20E 1.3.3 Overhead generator 1.3.3.1 Section overhead (SOH), Transport overhead (TOH) STM-16, OC-48 section overhead see Sec. 16, Page S-31 Settings can be made in the entire SOH, TOH excluding the B1 and B2 bytes and the complete pointer line (H1, H2, H3).
  • Page 49 ANT-20/ANT-20E Concatenation Options Table S-16 SOH, TOH contents; STM-16, OC-48 Specifications OC-48c/STM-16c S-31...

  • Page 50: Path Overhead (Poh), High-Order

    Concatenation Options ANT-20/ANT-20E 1.3.4 Path overhead (POH), high-order 1.3.4.1 Contiguous concatenation Standard overhead POH byte “Fixed Stuff” “Fixed Stuff” Column #2 to #4 Column #2 to #16 Container: Container: STS-12c SPE/VC-4-4c STS-48c SPE/VC-4-16c Fixed stuffing (3 columns) Fixed stuffing (15 columns) J1 (ASCII) “WG HP-TRACE”...

  • Page 51: Generation Of Pointer Actions

    ANT-20/ANT-20E Concatenation Options 1.3.5 Generation of pointer actions 1.3.5.1 Contiguous concatenation Stimulation AU-4 pointer sequences See “STM-1 mapping” and “STS-1 mapping” specifications. Pointer jumps Pointer jump from pointer value A to pointer value B (including setting a new pointer). Pointer jumps are executed using NDF.

  • Page 52: Oc-48C/Stm-16C Defect Generation

    Concatenation Options ANT-20/ANT-20E 1.3.7 OC-48c/STM-16c defect generation Defect Sensor Sensor threshold test function test On / Off M in N |---t1---| |------t2------| LOS (optical) M = 800 to 7200 t1 = 0.1 to 60.0 s N = 1600 to 8000 t2 = 0.2 to 600 s...

  • Page 53: Payload Generation

    ANT-20/ANT-20E Concatenation Options Payload generation 1.4.1 BULK signal generator Only with option BN 3035/90.90 or BN 3035/90.93 1.4.1.1 Payload Bit rate (STS-48c SPE/VC-4-16c) ........2396.16 Mbit/s Bit rate (STS-12c SPE/VC-4-4c) .
  • Page 54 Concatenation Options ANT-20/ANT-20E 1.4.2 ATM generator for STS-12c SPE/VC-4-4c container Only with options BN 3035/90.70 (ATM Module) and BN 3035/90.91 1.4.2.1 Scrambling Scrambling is according to ITU-T Recommendation I.432 (X +1). The function can be disabled. 1.4.2.2 Anomaly insertion The following anomalies can be inserted in addition to those described in Sec.

  • Page 55: Defect Generation

    ANT-20/ANT-20E Concatenation Options 1.4.2.3 Defect generation The following defects can be generated in addition to those described in Sec. 1.3.7, Page S-34. Defect Sensor function test Single On / Off VP-AIS VP-RDI VC-AIS VC-RDI Vx-AIS Vx-RDI 1 LCD (Loss of Cell Delineation) is generated by uncorrectable header errors in ≥ 7 consecutive cells.

  • Page 56: Background Load

    Concatenation Options ANT-20/ANT-20E Equidistant load profile setting range Cell spacing ..........4 to 40000 cell periods Maximum cell spacing deviation .

  • Page 57: Digital Signal Inputs

    ANT-20/ANT-20E Concatenation Options Receiver section Digital signal inputs 2.1.1 Signal input [44], optical Destruction of input [44] The maximum input level of -8 dBm must not be exceeded. Otherwise, the optical input can be destroyed. ⇒ Insert an optical attenuator in any case: –...
  • Page 58 Concatenation Options ANT-20/ANT-20E 2.1.2 Signal input [43], electrical Connector ..........unbalanced (coaxial) Type.
  • Page 59 ANT-20/ANT-20E Concatenation Options SDH and SONET RX signals • Evaluation of OC-48c signal conforming to Bellcore GR-253 standards. • Evaluation of STM-16c signal conforming to ITU-T recommendation G.707. 2.2.1 OC-48c/STM-16c RX signal OC-48c/STM-16c signal evaluation: • Analysis of Transport Overhead (TOH) / Section Overhead (SOH), Path Overhead (POH) and payload (BULK) for STS-12c SPE/VC-4-4c containers either directly or in conjunction with the ATM module (option BN 3035/90.70).
  • Page 60 Concatenation Options ANT-20/ANT-20E Output The overhead channels are output via the DCC/ECC interface, socket [21] (V.11) ......E1, F1, E2 (single byte) DCC/ECC interface, socket [21] (V.11) .
  • Page 61 ANT-20/ANT-20E Concatenation Options 2.3.3 Measurement of AU pointer actions Evaluation The AU pointer is indicated as an absolute value. The direction and number of pointer movements are detected. NDF (new data flag) is detected and counted. Display • Number of AU pointer operations:...

  • Page 62: Anomaly Measurements

    Concatenation Options ANT-20/ANT-20E 2.3.4 Anomaly measurements Evaluation All anomalies are counted and recorded simultaneously. Gate times ........... . . 1 to 99 seconds...

  • Page 63: Defect Detection

    ANT-20/ANT-20E Concatenation Options 2.3.5 Defect detection Evaluation All defects that are present are evaluated and recorded simultaneously as far as possible. Recording takes place only within a started measurement interval. Time resolution of defects ..........100 ms...
  • Page 64 Concatenation Options ANT-20/ANT-20E Payload 2.4.1 BULK signal receiver Only with option BN 3035/90.90 or BN 3035/90.93 2.4.1.1 Bit pattern payloads See Sec. 1.4.1.1, Page S-35 and Sec. 1.4.1.2, Page S-35 2.4.1.2 Anomaly measurements The following anomaly can be indicated and evaluated in addition to the anomalies described in Sec.

  • Page 65: Measurement Modes

    ANT-20/ANT-20E Concatenation Options 2.4.2.2 Measurement modes 2.4.2.3 Anomaly measurements The following anomalies can be indicated and evaluated in addition to the anomalies described in Sec. 2.3.4, Page S-44. Anomaly Explanation HCOR Correctable Header Error HUNC Uncorrectable Header Error Cell Error Ratio...

  • Page 66: Atm Performance Measurements

    Concatenation Options ANT-20/ANT-20E 2.4.2.5 ATM performance measurements Error-related performance parameters The measurements are made using test cells. Results Lost Cell Count, Cell Loss Ratio ..........CLR Misinserted Cell Count, Cell Misinserted Rate .
  • Page 67 ANT-20/ANT-20E Concatenation Options Peak cell rate The measurement is made in the test channel. Measurement interval ............1 s Resolution .

  • Page 68: Aal-1 Reassembly

    Concatenation Options ANT-20/ANT-20E 2.4.3.1 AAL-1 reassembly AAL-1 structured cells are reassembled from the SAR-PDU. The format is shown in the figure below. The TSE measurement is performed using framed or unframed pseudo-random bit sequences (PRBS) mapped into the SAR-PDU payload.

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