SONET/SDH TEST SETS - Helmut Singer Elektronik
Contents
1. DS1 DS3 E1 and E3 Transmit and Receive Interfaces for ATM Payloads Option UKZ O i y TRANSMIT DS3 ZMb s Neg Leo DSi 2Mb s Won E 1200 Q QUT psi MUX i000 J 760 ee ek i RECEIVE DS3 2Mb s 34Nb s a D ae DSI 2Mb s i000 1200 Option UKZ provides generation and measurement of PDH DSn signals with ATM payloads at interface rates of 1 544 Mb s DS 1 44 736 Mb s DS3 2 048 Mb s E1 and 34 368 Mb s E3 Frequency Offset can be added at the interface rates Line rate frequency can be measured Provides the following RZ input and output interfaces DS3 and E3 75 Q unbalanced E1 75 Q unbalanced 120 Q balanced DS1 100 Q balanced Allows selection of Line Code as AMI HDB3 B3ZS or B8ZS Provides Input sensitivity level selection Provides output level control for DS1 and DS3 Allows error and alarm injection at the physical and ATM layers Allows selection of PCLP or Direct mapping at DS3 Information on the ATM capabilities of this module is given in The ATM Operating Manual HP 37717C PDH DSn Features E1 E3 and E4 Transmit and Receive Interfaces for ATM Payloads Option UKN USE E1 E3 and E4 Transmit and Receive Interfaces for ATM Payloads Option UKN USE Option UKN USE provides generation and measurement of P2. The Automatic Jitter Tolerance results are plotted in graphical form relative to the ITU T mask The User can control the number of frequency points at which Jitter is generated up to 55 the Dwell time time taken at each frequency point the Delay time time delay at each frequency point before jitter is generated the Bit error threshold determines the threshold for the Jitter Tolerance PASS FAIL decision High or Low Q Factor selection 2 Mb s and 8 Mb s only the type of mask A or B SDH only the Test Pattern 10 j Ts a j 1 oo IL JITTER TX ef REF 1200 Option A3K A3Q Jitter Modules HP 37717C Jitter Measurement Option A3K A3Q Jitter amp Wander Generator Option A3K provides Jitter Generation at all ETSI rates 2 Mb s 8 Mb s 34 Mb s 140 Mb s STM 1 and STM 4 depending on which PDH and SDH options are fitted Allows the generation of User Definable Jitter including Automatic Jitter Tolerance as detailed for Option UHK The jitter modulation can be sourced internally or from an External source The external modulation is connected to the MOD IN port Allows testing to ITU T G 825 Full ITU T 0 171 generation capability from 10 Hz to 5 MHz Provides stimulus for Jitter Transfer measurements Peak to Peak Jitter and Modulating frequencies as per ITU T G 823 PDH and ITU T G 958 SDH Provides Wander Generation at 2 Mb s STM 1 and STM 4 depending on which PDH and SDH options are fitt
3. 8 Mb s 34 Mb s and 140 Mb s To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN or the STM 1 Electrical signal to the STM 1E IN of the A1N module or the STM 1 Optical signal to STM 1 IN of the AIN module The following Jitter measurements are available at all PDH rates and STM 1 Jitter Hit Count Jitter Hit Seconds Jitter Hit free Seconds Peak Jitter Positive and Negative Peak to Peak Jitter The following Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips A graphical display of Wander is also provided DEMOD OUT connector provides a Demodulated Jitter output DEMOD n a E A 7509 BQ STM Option A1P A1S Jitter Modules HP 37717C Jitter Measurement Option A1P A1S PDH STM 1 Electrical amp Optical amp STM 4 Optical Jitter Measurements Option A1P provides Jitter measurement at STM 1 Optical rate STM 4 Optical rate and PDH rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN or the STM 1 Electrical signal to the STM 1E IN of the A1P module or the STM 1 STM 4 Optical signal to STM 1 STM 4 IN of the A1P module The following Jitter measurements are available at all PDH rates STM 1 Optical rate and STM 4 Optical rate Jitter H
4. 048 Mbit s the generator timing can be recovered from the received data Option UKN USE provides ATM generation and measurement at the Physical and Cell layers at bit rates of 2 048 Mb s 34 368 Mb s 139 264 Mb s and if an SDH option is fitted 155 52 Mb s Option UKZ provides ATM generation and measurement at the Physical and Cell layers at bit rates of 1 544 Mb s DS1 44 736 Mb s DS3 2 048 Mb s E1 and 34 368 Mb s E3 SDH SONET rates are available via an SDH optional module Option USK Provides ATM Services layer generation and measurement with selectable header payload and distribution for 1 foreground and up to 9 background channels Graphic displays of the trafic at a point in the network rate history and About the HP 37717C Instrument Options cell delay variation are provided AAL 1 AAL 3 4 and AALS sublayer measurements are also included Option OYK Provides broadband auxiliary ATM generation and measurement with selectable header payload and distribution for 1 foreground and up to 9 background channels Graphic displays of the trafic at a point in the network rate history and cell delay variation are provided AAL 1 AAL 3 4 and AALS sublayer measurements are also included Option UHC US6 Provides 3 additional data outputs which are a replica of PDH Signal Out each delayed by a defined amount Option US1 US5 provides generation and analysis of mapped 140 Mb s 34 Mb s and 2 Mb s SDH signals at STM 1 155
5. 52 Mb s Errors can be added to the mapped payload A frequency offset capability is provided allowing the SDH line rate frequency to be offset from its synchronized rate In addition the capability of generating SDH Alarms and Errors is available Option Al T A1U provides the capability of US1 US5 and allows generation of ITU T G 783 Pointer sequences and access to Overhead at STM 1 including Overhead Sequence generation and Capture Option URU provides a STM 1 STM 4 optical interface at 1550 nm for long reach applications Option UKT provides a STM 1 STM 4 optical interface at 1330 nm with access to STM 4 overhead and Optical power measurement Option USN provides a STM 1 STM 4 optical interface at 1330 nm and 1550 nm with access to STM 4 overhead and Optical power measurement Option OYH provides binary interfaces for Options UKT and USN only Option UHK Adds Jitter generation at all PDH rates except 704 kb s if a PDH option is fitted and if Option US1 US5 or A1T A1U is fitted adds Jitter generation at STM 1 STM 4 Option UHN US9 Adds PDH Jitter measurement at all PDH rates except 704 kb s and adds Wander and Estimated Slips measurement at 2 048 Mb s Option AIM A1Q adds Jitter measurement at STM 1 Electrical rate and all PDH rates except 704 kb s Option AIN A1R adds SDH Jitter measurement at STM 1 Electrical and Optical rate and all PDH rates except 704 kb s Option AIP A1S adds SDH Jitter measurement at STM 1
6. DH signals with ATM payloads at rates of 2 048 E1 34 368 E3 and 139 264 E4 Mb s Frequency Offset can be added at the interface rates Line rate frequency can be measured TRANSMIT RECEIVE Provides the following input and output interfaces 2 8 34 140 Mb s 2 8 34 140 Mb s E1 RZ 75 Q unbalanced and 120 Q balanced E3 RZ 75 Q unbalanced E4 CMI 75 Q unbalanced Allows selection of E1 Line Code AMI HDB3 Allows selection of CRC 4 Multiframe at E1 IN 750 Information on the ATM capabilities of this module is given in The gt ATM Operating Manual MUX 750 DEMUX 750 HANDSET HP 37717C PDH DSn Features Binary Interfaces Option UH3 US7 Binary Interfaces Option UH3 US7 Option UH3 US7 provides binary NRZ interfaces for the structured PDH module option UKJ USA and the unstructured PDH module option UKK USB The interfaces can operate at any of the standard rates 100 ppm When used with option UKK USB with an external binary clock input the interfaces can operate at any rate any rate in the range 700 kb s to 170 Mb s TTL signal levels at data and clock ports and external clock port are valid from 700 kb s to 50 Mb s 75Q to ground ECL signals at data and clock ports and external clock port are valid from 700 kb s to 170 Mb
7. M 1 STM 4 Optical interfaces at 1310 nm No Longer available URU STM 1 STM 4 Optical interfaces at 1550 nm UKT STM 1 STM 4 Optical Interface at 1310 nm STM 4 overhead access and Optical power measurement USN STM 1 STM 4 Optical Interface at 1310 1550 nm STM 4 overhead access and Optical power measurement OYH SDH binary interface for Option UKT and USN only UH4 FC PC optical adaptor for options UH1 UH2 and URU UHS DIN47256 optical adaptor for options UH1 UH2 and URU UH6 ST optical adaptor for options UH1 UH2 and URU UH7 Biconic optical adaptor for options UH1 UH2 and URU About the HP 37717C Instrument Options Option No Description UH8 NEC D4 optical adaptor for options UH1 UH2 and URU UHK Jitter generation UHN US9 PDH Jitter measurement Wander and estimated Slips AIM A1Q STM 1 Electrical and PDH Jitter measurement AIN AIR STM 1 Optical an electrical and PDH Jitter measurement A1P A15 STM 1 Optical and Electrical STM 4 Optical and PDH Jitter measurement A3B Remote Control via RS 232 C HP IB and LAN plus a Parallel Printer Port A3D Remote Control via RS 232 C and HP IB plus a Parallel Printer Port USS Distributed Network Analyser capability UKX In lid Printer 1A8 Remote Control via HP IB No Longer available 1CW Remote Control via RS 23 C No Longer available 1F7 Remote Control via LAN No Longer available USE Virtual Remote
8. OD OUT A graphical display of Wander is also provided 2 8 34 140Mpjs DEMOD OUT connector provides a Demodulated Jitter output Option UHN US9 2M REF IN Option A1M A1Q Jitter Modules HP 37717C Jitter Measurement Option A1M A1Q PDH amp STM 1 Electrical Jitter Measurements Option A1M provides Jitter measurement at STM 1 Electrical rate and PDH rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN or the STM 1 Electrical signal to the STM 1E IN of the AIM module The following Jitter measurements are available at all PDH rates and STM 1 Electrical rate Jitter Hit Count Jitter Hit Seconds Jitter Hit free Seconds Peak Jitter Positive and Negative Peak to Peak Jitter The following Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips A graphical display of Wander is also provided DEMOD OUT connector provides a Demodulated Jitter output JITTER RECEIVER QM REF IN mm mm om Option A1N A1R Jitter Modules HP 37717C Jitter Measurement Option A1N A1R PDH amp STM 1 Optical amp Electrical Jitter Measurements Option A1N provides Jitter measurement at STM 1 Optical and electrical rate and PDH rates of 2 Mb s
9. SONET SDH TEST SETS Communications Performance Analyzers SDH PDH Test Set Singte unit solution for SDH PDH ATM Test and jitter generation and test In service and out of service measurements Monitors POH and SDH overhead framing parity and alarm information HP 37717C HP 37717B C Communications Performance Analyzers These offer modular upgradeable one box solutions for installation field maintenance commissioning and manufacturing Rugged and portable they allow full functional testing of SDH PDH and ATM equipment including jit ter The HP 37717C has color display and graphics printer The HP 37717B monochrome version provides a budget solution with a 24 column printer Both have a 3 5 inch disk drive for results retrieval and storage firmware upgrades and results export to PC applications SDH The SDH modules operate at STM 0 STM 1 and STM 4 with opti cal interfaces at 1310 and 1550 nm Combined with the structured PDH module mux demux BER tests from 622 Mb s to n 64 kb s are possi ble n or out of service tests on PDH SDH transmission lines or PDH payloads carried in SDH systems are supported The operation of SDH network alarms error monitors protection switches pointer processors and de synchroniser circuits can be verified with this module Drop insertion of PDH payloads to from the SDH signal and an error output are also available SDH Alarm and Channel Scan features make this product the indus
10. and STM 4 Optical rates STM 1 Electrical rate and all PDH rates except 704 kb s About the HP 37717C Instrument Options Option A3B provides an external printer port and remote control via RS 232 C HP IB and LAN Option A3D provides an external printer port and remote control via RS 232 C and HP IB Option USS provides Distributed Network Analyser capability Option UKX provides an in lid printing facility About the HP 37717C Instrument Options Option Summary The following table provides a summary of the available HP 37717C options Standard options are fitted with BNC connectors Options identified in have Siemens connectors Option No Description KK USB Unstructured PDH generation and measurement KJ USA Structured PDH generation and measurement KL USC Structured PDH measurement only No Longer available ATM generation and measurement U U U UKN USE U U 0 KZ ATM generation and measurement at DS1 DS3 E1 and E3 rates SK ATM Services layer generation and measurement YK Broadband auxiliary ATM generation and measurement UHC US6 Multiple PDH outputs US1 USS Generation and analysis of STM 1 electrical SDH signals SDH frequency offset and Alarm Error generation AIT A1U As US1 US5 plus Pointer generation and Overhead access UHI STM 1 Optical interface at 1310 nm No Longer available UH2 ST
11. at which Jitter is generated up to 55 Fixed input masks ITU T G 823 for PDH and ITU T G 958 for SDH are provided A user defined mask is also available Jitter Transfer results are displayed in tabular form and in Graphical form The ITU T pass mask is also displayed on the graph Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips Implied Frequency Offset A graphical display of Wander is also provided DEMOD OUT connector provides a Demodulated Jitter output Jitter Modules HP 37717C Jitter Measurement Option A3N A3P PDH STM 1 Electrical amp Optical amp STM 4 Optical Jitter Measurements JITTER RECEIVER 2M REF IN 12003 Option A3N A3P Option A3N provides Jitter measurement at STM 1 Optical and electrical rate STM 4 Optical rate and PDH rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s Compliance to ITU T 0 171 and testing to ITU T G 825 G 958 is provided To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN or the STM 1 Electrical signal to the STM 1E IN of the A3N module or the STM 1 STM 4 Optical signal to STM 1 STM 4 IN of the A3N module Jitter measurements are available at all PDH rates STM 1 Optical and electrical rate and STM 4 Optical rate Jitter Hit Count Jitter Hit Seconds Jitter Hit Free Seconds Peak Jitter Positive and N
12. ed An external clock must be connected to the 2M REF input The 2M REF input can be used as an external clock for 2 048 Mb s PDH transmission The wander modulation can be sourced internally or from an external source The external modulation is connected to the MOD IN port Allows the generation of User Definable Wander as follows Spot frequency Wander within the ITU T mask a fiat JITTER TX aM REF 200 Option 140 141 Jitter Modules HP 37717C Jitter Measurement Option 140 141 Extended Jitter Generator Option 140 provides Jitter Generation at all ETSI rates 2 Mb s 8 Mb s 34 Mb s 140 Mb s STM 1 and STM 4 depending on which PDH and SDH options are fitted Allows the generation of User Definable Jitter including Automatic Jitter Tolerance as detailed for Option UHK The jitter modulation can be sourced internally or from an External source The external modulation is connected to the MOD IN port Allows testing to ITU T G 825 Full ITU T 0 171 generation capability from 10 Hz to 5 MHz Provides stimulus for Jitter Transfer measurements Peak to Peak Jitter and Modulating frequencies as per ITU T G 823 PDH and ITU T G 958 SDH The 2M REF input can be used as an external clock for 2 048 Mb s PDH transmission 12 HP 37717C PDH DSn Features Introduction to PDH DSn Introduction to PDH DSn The Plesiochronous Digital Hierarchy PDH DSn is still the dominant technology in most exist
13. egative Peak to Peak Jitter Peak rms Jitter Automatic Jitter Transfer with narrowband selective filtering in conjunction with Option A3K or UHK Jitter Generation The user can control the number of frequency points at which Jitter is generated up to 55 Fixed input masks ITU T G 823 for PDH and ITU T G 958 for SDH are provided A user defined mask is also available Jitter Transfer results are displayed in tabular form and in Graphical form The ITU T pass mask is also displayed on the graph Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips Implied Frequency Offset A graphical display of Wander is also provided DEMOD OUT connector provides a Demodulated Jitter output JITTER TX 2 amp 34 140 Mbis Option UHK Jitter Modules HP 37717C Jitter Measurement Option UHK Jitter Generator Option UHK provides Jitter Generation at all ETSI rates 2 Mb s 8 Mb s 34 Mb s 140 Mb s STM 1 and STM 4 depending on which PDH and SDH options are fitted Allows the generation of User Definable Jitter as follows Spot frequency Jitter within the ITU T mask Swept frequency Jitter within the ITU T mask Automatic Jitter Tolerance testing of PDH and SDH networks covering high and low Q systems using fixed jitter tolerance masks Peak to Peak Jitter and Modulating frequencies as per ITU T G 823 PDH and ITU T G 958 SDH
14. ing telecommunications networks throughout the world although it is being replaced in many networks by Synchronous Digital Hierarchy SDH or SONET networks PDH DSn networks were developed at a time when point to point transmission was the predominant network requirement To support this requirement the standard approach to network management and maintenance was to use manual distribution frames for access to individual signals This is now considered out of date and consequently SDH SONET is now the preferred network topology for new installations However PDH DSn networks will exist for a long time to come even in networks where SDH SONET is the preferred technology PDH is the ETSI international standard based on 2 Mb s defined by the ITU T and covers the hierarchal transmission rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s DSn is the ANSI standard covering transmission rates of 1 544 Mb s DS1 and 44 736 Mb s DS3 PDH is asynchronous at 8 Mb s 34 Mb s and 140 Mb s In order to access a signal for rerouting or test purposes the whole line signal structure must be demultiplexed step by step down to the 2 Mb s level because of the asynchronous nature of the multiplexing At each multiplexing step the bit rate of the individual tributary signals is controlled within specified limits and is not synchronized with the multiplex equipment Because the bit rates of the individual tributaries are controlled within specific limits this
15. it Count Jitter Hit Seconds Jitter Hit free Seconds Peak Jitter Positive and Negative Peak to Peak Jitter The following Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips A graphical display of Wander is also provided DEMOD OUT connector provides a Demodulated Jitter output Jitter Modules HP 37717C Jitter Measurement Option A3L A3M PDH amp STM 1 Electrical Jitter Measurements JITTER RECEIVER 2M REF iN 120W Option A3L A3M Option A3L provides Jitter measurement at STM 1 Electrical rate and PDH rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s Compliance to ITU T 0 171 and testing to ITU T G 825 G 958 is provided To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN or the STM 1 Electrical signal to the STM 1E IN of the A3L module Jitter measurements are available at all PDH rates and STM 1 Electrical rate Jitter Hit Count Jitter Hit Seconds Jitter Hit Free Seconds Peak Jitter Positive and Negative Peak to Peak Jitter Peak rms Jitter Automatic Jitter Transfer with narrowband selective filtering in conjunction with Option UHK or A3K Jitter Generation The user can control the number of frequency points at which Jitter is generated up to 55 Fixed input masks ITU T G 823 for PDH and ITU T G 958 for SDH are provided A user defined ma
16. movements ATM network elements such as switches routers multiplexers and cross connects are also susceptible to jitter and it is therefore important to minimize jitter in ATM networks Wander is an extremely slow variation in the timing of the pulse stream Excessive amounts of wander in a network will cause timing problems resulting in pointer movements Wander measurements are made at 2 Mb s using an external 2 Mb s MTS ITU T G 811 as a reference Estimated frame and bit slips are also indicative of wander effects The HP 37717C provides comprehensive Jitter testing at all PDH and SDH rates from 2 Mb s to 622 08 Mb s STM 4 Jitter Modules HP 37717C Jitter Measurement HP 37717C Jitter Measurement Four Jitter measurement options are available according to your testing needs Option UHN US9 PDH Jitter Measurement Option UHN provides Jitter measurement at PDH rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s LAIL To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN The following Jitter measurements are available at all PDH rates JITTER RX Jitter Hit Count 2M REF IN Jitter Hit Seconds Jitter Hit free Seconds Peak Jitter Positive and Negative Peak to Peak Jitter The following Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips DEM
17. nstrument Options The HP 37717C is a multi rate bit error measuring test set It can generate and receive a range of data patterns and provide analysis to ITU T Rec G 821 G 826 M2100 M2110 M2120 depending on the options fitted 75 Q unbalanced data interfaces are provided at all PDH DSn data rates except DS1 option UKZ and STM 1 only In addition 120 Q balanced data interfaces are provided at 2 048 Mbit s and 704 kb s in Option UKK USB 100 Q balanced data interface is provided for DS1 UKZ only AMI HDB3 B8ZS or CMI coding is used depending on the selected rate Accurate error measurements can still be made in the presence of half rate cable loss of up to 12 dB and at protected monitor points Option UKK USB provides unstructured PDH measurements at standard bit rates of 704 kbit s 2 048 Mbit s 8 448 Mbit s 34 368 Mbit s and 139 264 Mbit s Frequency offset capability of 100 ppm about the standard rates is provided At 704 kbit s and 2 048 Mbit s the generator timing can be recovered from the received data In Service FAS measurements are available at 2 Mb s 8 Mb s 34 Mb s and 140 Mb s Option UKJ USA provides structured PDH generation and measurement at standard bit rates of 2 048 Mbit s 8 448 Mbit s 34 368 Mbit s and 139 264 Mbit s Full Mux Demux testing from 64 kb s to 140 Mb s including N X 64 kb s 2 Mb s 8 Mb s and 34 Mb s Frequency offset capability of 100 ppm about the standard rates is provided At 2
18. ons UKJ USA and UKN USE Structured PDH Generation and Measurement Options UKJ USA and UKN USE Options UKJ USA and UKN USE provide generation and measurement of Structured or Unstructured PDH at interface rates of 2 048 Mb s E1 8 448 Mb s E2 34 368 Mb s E3 and 139 264 Mb s E4 e oo Structured test signal rates of 64 kb s 2 048 Mb s 8 448 Mb s L L and 34 368 Mb s are provided TRANSMIT RECEIVE 8 44 140Mbs 8 34 140Mbs Frequency Offset can be added at the interface rates Line rate frequency can be measured Provides 75 Q unbalanced or 120 Q balanced input and output interfaces Allows selection of PRBS WORD or USER patterns Allows selection of Line Code AMI HDB3 or CMI Interface and test signal rates can be Framed or Unframed MUX connector allows a2 Mb s signal from external equipment to be inserted into the HP 37717C test signal DEMUX connector allows a 2 Mb s signal from the HP 37717C to be Dropped to external equipment Option UKN USE also provides generation and measurement of PDH signals with ATM payloads Option UKN USE therefore provides all of the PDH facilities described here with the additional facilities described on page 6 Information on the ATM capabilities of the UKN USE module is given in The ATM Operating Manual Option UKJ USA HP 37717C PDH DSn Features DS1 DS3 E1 and E3 Transmit and Receive Interfaces for ATM Payloads Option UKZ
19. r capability OB2 Provides one additional operating manual OBF Provides one additional remote control manual OB3 Provides a service manual W30 Provides two additional years of hardware support beyond the standard one year warranty Jitter Modules Introduction to Jitter Introduction to Jitter Errors will occur in a digital signal if jitter at the input of Network Equipment exceeds a threshold value It is important to check that the maximum input jitter that can be tolerated by that equipment meets the ITU T standards for maximum tolerable input jitter Excessive jitter not only causes errors alarms and loss of synchronization but directly affects quality of service within the network During the transition from a PDH network to mixed PDH SDH networks tight control of jitter levels is essential especially as new sources of jitter emerge caused by the mapping process and network synchronization problems resulting in pointer movements The pointer movements cause tributary jitter at the PDH output ports of the network element Cascading SDH regenerators on long distance links makes a build up of jitter unavoidable It is vital to keep the jitter accumulation at the line side of the network element to a minimum as the SDH line rate is increasingly being used for synchronization purposes within SDH networks Excessive line jitter may cause timing problems between network elements resulting in errors and pointer
20. s 75Q to 2V The external clock input may be used to clock coded data from the PDH DSn transmitter at standard rates In addition if Option UKK USB Unstructured PDH is fitted can clock coded data in the range 700 kb s to 170 Mb s Simultaneous jitter of binary clock and binary data outputs is possible 2 8 34 amp 140 Mb s if Option UHK USB or A3K Jitter Generator is fitted Jitter measurement on the binary clock input is possible 2 8 34 amp 140 Mb s 100 ppm if Option UHN AIM AIN or AIP Jitter Measurement is fitted Frequency measurement of the external clock input and binary clock input is provided HP 37717C PDH DSn Features Multiple PDH Outputs Option UHC US6 Multiple PDH Outputs Option UHC US6 Option UHC US6 Multiple PDH Outputs provides three additional 75 PDH outputs OUT 1 is delayed by 4 bits relative to the main PDH OUT OUT 2 is delayed by 8 bits relative to the main PDH OUT OUT 3 is delayed by 12 bits relative to the main PDH OUT MULTIPLE 0 u TP U TS NOTE When used with Option UKZ multiple outputs are available at the 2 and 34 i Mb s E1 and E3 rates
21. sk is also available Jitter Transfer results are displayed in tabular form and in Graphical form The ITU T pass mask is also displayed on the graph Wander measurements are only available at 2 048 Mb s Peak Wander Positive and Negative Peak to Peak Wander Estimated Bit Slips Estimated Frame Slips Implied Frequency Offset A graphical display of Wander is also provided DEMOD OUT connector provides a Demodulated Jitter output Jitter Modules HP 37717C Jitter Measurement Option A3V A3W PDH amp STM 1 Optical amp Electrical Jitter Measurements JITTER RECEIVER 2M REF IN 12003 Option A3V A3W Option A3V provides Jitter measurement at STM 1 Optical and electrical rate and PDH rates of 2 Mb s 8 Mb s 34 Mb s and 140 Mb s Compliance to ITU T 0 171 and testing to ITU T G 825 G 958 is provided To measure jitter connect the PDH signal to the PDH IN port of the PDH module Options UKK UKJ and UKN or the STM 1 Electrical signal to the STM 1E IN of the A3V module or the STM 1 Optical signal to STM 1 STM 4 IN of the A3V module Jitter measurements are available at all PDH rates and STM 1 Jitter Hit Count Jitter Hit Seconds Jitter Hit Free Seconds Peak Jitter Positive and Negative Peak to Peak Jitter Peak rms Jitter Automatic Jitter Transfer with narrowband selective filtering in conjunction with Option A3K or UHK Jitter Generation The user can control the number of frequency points
22. try standard for ease of use PDH PDH rates of 704kb s and 2 8 34 and 140 Mb s and an error out put are provided in the basic PDH module The structured PDH module gives 2 8 34 and 140 Mb s rates The structured module provides full structured PDH capability including full mux demux BER from 140 Mb s to n 64 kb s n 1 to 31 An alarm scan capability graphically points to problem areas within the signal structure a telephone handset connection gives full talk listen capability Jitter and Wander A range of jitter modules gives full PDH SDH and ATM jitter generation measurement 2 8 34 140 Mb s 155 Mb s STM 1 electrical and optical and 622 Mb s STM 4 optical rates are supported Jitter tolerance verification of SDH ITU T G 958 G 825 and PDH ITU T G 823 network elements is possible Tests are made according to ITU T 0 171 and can measure the large jitter transients that accompany pointer movements in SDH networks Generate pointer sequences to TU T G 783 with the appropriate SDH module and mea Sure the effect on the tributary outputs using the tributary jitter measure ment module Wander generation available at 2Mb s STM 1 and STM 4 Wander measurement is available at 2 Mb s HP 37717B 37717C 37724A Easy results interpretation with new color interface ATM cell generation and analysis and ATM services layer test Pointer sequence generation to ITU T G 783 Works with HP E4540A distributed network analysis soft
23. type of multiplexing is referred to as Plesiochronous i e nearly synchronous The individual tributaries are synchronized with the equipment at each multiplex step by the process of positive bit stuffing justification In new SDH SONET networks PDH DSn signals are mapped into virtual containers tributaries before being transported as part of the SDH SONET payload The SDH SONET payload must then be demapped into a PDH DSn tributary signal Therefore all PDH DSn SDH SONET and mixed PDH SDH DSn SONET networks require test sets which have PDH DSn interfaces and PDH DSn test capability HP 37717C PDH DSn Features Options With PDH DSn Capability Options With PDH DSn Capability Unstructured PDH Generation and Measurement Option UKK USB Option UKK USB Unstructured PDH provides generation and 4 a measurement of unstructured PDH at interface rates of 704 kb s 2 048 Mb Nee s 8 448 Mb s 34 368 Mb s and 139 264 Mb s E LJ L Allows the addition of Frequency Offset to the PDH signal C L C L Provides 75 Q unbalanced or 120 Q balanced input and output interfaces PDH Allows selection of PRBS WORD or USER patterns 07 2 6 34 140 Mbis OT yor ry N Allows selection of Line Code AMI HDB3 or CMI NA Ey VI hel Provides an ECL pulse each time an error occurs Error Out i ed LIC ICICI os HP 37717C PDH DSn Features Structured PDH Generation and Measurement Opti
24. ware o o o With compliments Helmut Singer Elektronik www helmut singer de info helmut singer de fon 49 241 155 315 fax 49 241 152 066 Feldchen 16 24 D 52070 Aachen Germany ATM Cell and Service Layer Test The ATM cell module gives transmit and receive capability at the physi cal and cell layers and through mode monitor for convenient access The ATM services module available in the HP 37717C fully tests B ISDN pro tocol stack layers See page 454 Distributed Network Analysis Use with the HP E4540A distributed network analysis software to create a results management and remote instrument control system See page 439 Specifications Interfaces UPDH 0 7 2 8 34 and 140 Mb s to G 703 SPDH 2 8 34 and 140 Mb s to G 703 SDH STM 0e STM 1e STM 00 STM 10 STM 40 1310 and 1550 nm ATM 0S1 0S3 and 2 34 and 140 Mb s STM 1e STM 10 and STM 40 See page 454 for ATM Cell and Services Specifications Ordering Information HP 377178 C Communication Analyzers Accessories HP 15744A Optical Power Coupler HP 15770A Rack mount Kit HP 15772A Hard Robust Transit Case HP E4540A Distributed Network Analysis Software HP 15910A Soft Vinyl Carrying Case HP 37724A SDH PDH Test Set The HP 37724A is a comprehensive field portable SDH PDH test set for applications from 2 Mb s E1 up to 622 Mb s STM 4 Ordering Information HP 37724A SDH PDH Test Set About the HP 37717C Instrument Options I
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