Resumo do conteúdo contido na página número 1
User’s Guide
DSn/SONET
Operation
HP 37718A
OmniBER 718
Resumo do conteúdo contido na página número 2
Copyright Hewlett- Warranty WARNING Packard Ltd.1998 The information Warning Symbols Used contained in this on the Product All rights reserved. document is subject to Reproduction, change without notice. adaption, or translation without Hewlett-Packard makes prior written The product is marked ! no warranty of any permission is with this symbol to The product is marked kind with regard to this prohibited, except as indicate that a laser is with this symbol when material, including, allowed und
Resumo do conteúdo contido na página número 3
User’s Guide DSn/SONET Operation HP 37718A OmniBER 718
Resumo do conteúdo contido na página número 4
About This Book This book tells you how to select the features that you want to use for your test. The selections available are presented in the following groups: • Transmit and receive interfaces • Test features, for example, the addition of errors and alarms to the test signal • Measurements including test timing • Storing, logging and printing results with general printer information • Using instrument and disk storage • Using the “Other” features. The selections available will depend o
Resumo do conteúdo contido na página número 5
Contents 1 Setting the Interfaces Setting DSn Transmit Interface 2 Setting SONET Transmit Interface 4 Setting Jitter Transmit Interface 7 Setting Wander Transmit Interface 9 Setting SONET THRU Mode 11 Using Smart Test 13 Setting DSn Receive Interface 15 Setting SONET Receive Interface 17 Setting Jitter Receive Interface 18 Setting Extended Jitter Receive Interface 19 Setting Wander Receive Interface 20 2 Selecting Test Features Using Transmit Overhead Setup 22 Using Receive Overhead Monitor 24 S
Resumo do conteúdo contido na página número 6
Contents Inserting an External DSn Payload/Test Signal 43 Dropping an External Payload/Test Signal 46 Adding Errors & Alarms at the SONET Interface 49 Adding Errors & Alarms to the DSn Interface/DSn Payload 50 Using FEAC Codes 51 Setting DSn Spare Bits 53 Adding Pointer Adjustments 54 Using Pointer Graph Test Function 61 Stressing Optical Clock Recovery Circuits 63 Generating Automatic Protection Switch Messages 64 Inserting & Dropping Data Communications Channel 65 3 Making Measurements Usin
Resumo do conteúdo contido na página número 7
Contents Measuring Jitter Transfer 92 4 Storing, Logging and Printing Saving Graphics Results to Instrument Store 98 Recalling Stored Graph Results 99 Viewing the Bar Graph Display 101 Viewing the Graphics Error and Alarm Summaries 103 Logging Graph Displays 105 Logging Results 107 Logging on Demand 110 Logging Jitter Tolerance Results 112 Logging Jitter Transfer Results 114 Logging Results to Parallel (Centronics) Printer 116 Logging Results to HP-IB Printer 117 Logging Results to Internal Prin
Resumo do conteúdo contido na página número 8
Contents Labeling a Disk 132 Managing Files and Directories on Disk 133 Saving Graphics Results to Disk 140 Saving Data Logging to Disk 142 Saving Configurations to Disk 143 Recalling Configuration from Disk 144 Recalling Graphics Results from Disk 145 Copying Configuration from Instrument Store to Disk 146 Copying Configuration from Disk to Instrument Store 148 Copying Graphics Results from Instrument Store to Disk 150 6 Selecting and Using "Other" Features Coupling Transmit and Receive Settings 15
Resumo do conteúdo contido na página número 9
Contents 7 STS-1 SPE Background Patterns 8 ETSI/ANSI Terminology ETSI/ANSI Conversion and Equivalent Terms 170 ix
Resumo do conteúdo contido na página número 10
Contents x
Resumo do conteúdo contido na página número 11
1 1 Setting the Interfaces This chapter tells you how to set the instrument interfaces to match the network being tested.
Resumo do conteúdo contido na página número 12
Setting the Interfaces Setting DSn Transmit Interface Description DSn transmit interface settings should match network equipment settings of Rate, Termination and Line Code and determine the Payload to be tested. TIP: To set the Transmitter and Receiver to the same interface settings choose OTHER SETTINGS CONTROL COUPLED . HOW TO: 1 Choose the required SIGNAL rate. Rates of DS1, DS3, 2 Mb/s and 34 Mb/s are available. 2 If you have chosen 2 Mb/s as the SIGNAL rate, choose the required CLOCK SYNC
Resumo do conteúdo contido na página número 13
Setting the Interfaces Setting DSn Transmit Interface 3 If DS1 or DS3 is chosen, choose the required OUTPUT LEVEL. 4 If you have chosen 2 Mb/s as the SIGNAL rate, choose the required TERMINATION. (At all other signal rates the impedance is fixed). 5 If you have chosen 2 Mb/s or DS1 as the SIGNAL rate, choose the required LINE CODE. (At 34 Mb/s and DS3 coding is fixed). 6 If required, choose the FREQUENCY OFFSET value. See “Adding Frequency Offset to the DSn Signal” page 33. 7 Choose the required
Resumo do conteúdo contido na página número 14
Setting the Interfaces Setting SONET Transmit Interface Setting SONET Transmit Interface Description SONET transmit interface settings should match the network equipment settings of Rate, Wavelength and Mapping, determine the payload to be tested and set background conditions to prevent alarms while testing. TIP: If you wish to set the HP 37718A transmitter and receiver to the same interface settings choose OTHER . SETTINGS CONTROL COUPLED HOW TO: 1 Make your choice of SIGNAL rate. If Option 10
Resumo do conteúdo contido na página número 15
Setting the Interfaces Setting SONET Transmit Interface 4 Choose FOREGROUND , BACKGROUND F/G MAPPING MAPPING and type of payload. B/G MAPPING Mapping may be selected from a pictorial display by moving the cursor to MAPPING and pressing SET . Use and to move between STS Layer choice, VT Layer choice and Payload Layer choice. Use and to choose the mapping. Use SET to confirm your choice and return to the SONET display. MAIN SETTINGS 5 If VT-6 mapping is chosen, VT CONCATENATION selection is ena
Resumo do conteúdo contido na página número 16
Setting the Interfaces Setting SONET Transmit Interface If you have chosen 2 Mb/s, DS1 or DS3 under Mapping, the Framed choice is expanded to provide a menu of framing types. 9 Choose the PATTERN type and PRBS polarity. 10 Choose the mapping required in the background (non-test) STS’s. 11 If VT mapping is chosen for the test STS, choose the PATTERN IN OTHER VT’s. 6
Resumo do conteúdo contido na página número 17
Setting the Interfaces Setting Jitter Transmit Interface Setting Jitter Transmit Interface Description: You can add jitter to the transmitted DSn or SONET signal at 2 Mb/s, 34 Mb/s, STS-3, OC-3, OC-12, and OC-48. You can source the jitter modulation internally or from an external source. HOW TO: 1 If you are adding jitter to the DSn signal, set up the DSn transmit interface. See Chapter “Setting DSn Transmit Interface”. 2 If you are adding jitter to the SONET signal, set up the SONET transmit in
Resumo do conteúdo contido na página número 18
Setting the Interfaces Setting Jitter Transmit Interface 5 Choose the modulation source. If adding jitter to the DSn signal and is chosen, connect EXTERNAL the external source to the MOD IN port of the DSn Jitter TX module. Up to 10 UI of external jitter modulation can be added at the MOD IN port. If adding jitter to the SDH signal and is chosen, connect EXTERNAL the external source to the MOD IN port of the SONET Clock module. Up to 20 UI of external jitter modulation can be added at the MOD IN
Resumo do conteúdo contido na página número 19
Setting the Interfaces Setting Wander Transmit Interface Setting Wander Transmit Interface Description: You can add Wander to the 2 Mb/s DSn signal and the STS-3, OC-3, OC-12 or OC-48 SONET signal. HOW TO: DSn Wander (2 Mb/s) 1 Connect REF OUT on the SONET Clock module to REF IN on the DSn Jitter TX module (this provides the Wander Reference). 2 Set up the DSn transmit interface, choose CLOCK SYNC 2M REF and select the SOURCE required from the menu. See “Setting DSn Transmit Interface” page 2.
Resumo do conteúdo contido na página número 20
Setting the Interfaces Setting Wander Transmit Interface 6 Choose the WANDER MASK setting required. You can choose the wander modulating frequency and wander amplitude if is chosen. OFF If you choose , you can choose the "spot" wander frequency. The SPOT wander amplitude is adjusted and controlled according to your wander frequency choice. SONET Wander (STS-3, OC-3, OC-12, OC-48) 7 Set up the SONET transmit interface. See “Setting SONET Transmit Interface” page 4. 8 Choose JITTER/WANDER . WAND
