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Setting Jitter/Wander Parameters - NSCA TRA-CAL

1. J 20 Appendix K Cleaning Instructions K 1 Glossary and ITU T Standards Index xii CTS 850 SDH PDH Test Set User Manual Table of Contents List of Figures Figure 1 1 Installing the Accessory Pouch 1 8 Figure 1 2 Inserting the Pouch Under the Front Panel Trim 5 see s oe eee cane IR REC ne ede ER 8 1 9 Figure 1 3 Location of the D Ring on the Accessory Pouch 1 10 Figure 1 4 Rear Panel Controls and Connectors Used in Setup 4 2 du y oy o ERR eR MRS 1 12 Figure 1 5 ON STBY Button eee 1 14 Figure 2 1 Controls Located Around the Display 2 2 Figure 2 2 Front Panel Controls Indicators and CONTECIOIS 64 ceed oe Re EISE USE RIVER eee eee tae as 2 3 Figure 2 3 Rear Panel Controls and Connectors 2 4 Figure 2 4 Status Lights eee 2 5 Figure 2 5 Major Areas of the Display 2 6 Figure 2 6 Specific Elements of the Display 2 7 Figure 2 7 The Five Menus eere 2 9 Figure 2 8 Menus and Pages eeee 2 11 Figure 2 9 Menu Select Buttons 2 12 Figure 2 10 How to Display aPage 2 13 Figure 2 11 Help Dialog Box eee 2 14 Figure 2 12 Selecting a Parameter 2 17 Figure 2 13 Selecting Choices From a List 2 18 Figure 2 14 Selecting USER DEFINED 2 19
2. 3 99 Figure 3 39 Adding Data into the DCC 3 101 Figure 3 40 Adding Data into the User Channel 3 102 Figure 3 41 Choosing Trace Settings 3 103 Figure 3 42 Choosing Signals Labels 3 104 Figure 3 43 Choosing Overhead PRBS Test 3 105 Figure 3 44 Sequence for Setting PDH Signal Paramelere oos uiee e ete wie e ORE Rr Roe x 3 107 Figure 3 45 Sequence for Setting PDH Signal Parameters when mapping a PDH Signal 3 107 Figure 3 46 TX Settings from Transmit Setting Menu 3 108 Figure 3 47 PDH Transmit Rates 3 110 Figure 3 48 Editing the User Word 3 117 Figure 3 49 Sequence for Setting SDH Signal Parameters ues eere zu do wEen nC E Oben avia 3 120 Figure 3 50 Sequence for Setting SDH Signal Parameters When Demapping a PDH Signal 3 120 Figure 3 51 SDH Receive Rates 3 121 Figure 3 52 Example of SDH Structure 3 124 Figure 3 53 Signal Status Payload Frequency menu 3 130 Figure 3 54 Figure 3 55 Figure 3 56 Analysis Config Round Trip Delay Offset 3 131 RX CAS amp Voice Receive Settings Menu 3 133 Setting PDH Mapping 3 135 CTS 850 SDH PDH Test Set User Manual Table of Contents Figure 3 57 J1 Path Trace Message Received by THECUS SOW sie eres EE MESURE CR Celer oU 3 142 Figure 3 58
3. Figure 3 82 RESULTS Wander and Line Frequency 3 182 CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters Calibrating Jitter Systems Periodic calibration of the jitter generation and measurement systems is recommended to maintain best accuracy You can execute built in Jitter Measurement calibration routines before making critical measurements Run Jitter Measurement before runing Jitter Generation Calibration This Jitter Measurement calibration takes about 15 minutes for all rates You can calibrate one particular rate by selecting the appropriate calibration routine If your CTS 850 test set supports a 45 Mb s rate this screen below will show that rate in addition to all the others displayed Tek Measurements Stopped OIM IE TUTILITY STM 1E CHOICES Calibration Control Ready Calibration System se Jitter Measurement pan Calibration Routine All STATUS Rate Generator Measurement Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Calibrated Not available Not available Calibrated Calibrated MISC PRINTER SETTINGS SETUP CONTROL CONFIG TEST REMOTE INSTR SELF Figure 3 83 Example of UTILITY Jitter Calibration CTS850 SDH PDH Test Set User Manual 3 183 Setting Jitter Wander Parameters 3 184 Executing Jitter Calibration To calibrate the jitter measurement system Select
4. 3 68 Table 3 7 TX Rates and Structures 3 84 Table 3 8 Payload Framing Source 3 84 Table 3 9 Test Patterns Background Pattern 3 85 Table 3 10 Choices for Bits 5 6 and 7 of the V5 Byte 3 95 Table 3 11 Overhead Bytes That Cannot Be Edited 3 95 Table 3 12 Bytes You Cannot Edit Due to Parameter Settings 215 39 dvb oy wx ee cers EYE 3 96 Table 3 13 Transmit Trace Settings Choices 3 102 Table 3 14 Transmit Overhead Testing Choices 3 105 Table 3 15 64k TX Setting Choices 3 108 Table 3 16 PDH Rate Line Codes 3 112 Table 3 17 RX Rates and Structures 3 126 CTS 850 SDH PDH Test Set User Manual Table of Contents Table 3 18 Payload Framing Source Table 3 19 Test Patterns oir or REESE ES Table 3 20 Signal Status Choices Table 3 21 Analysis Config Choices Table 3 22 64k RX Settings choices Table 3 23 RX CAS amp Voice Choices Table 3 24 Maximum Error Rates for SDH Signals Table 3 25 Maximum Error Rates for TU Mappings and PDH signals sii 0 0 s02sasuseiet eed caves ea wees Table 3 26 Anomaly Defect Transmit Failure options Table 3 27 Pointer Sequences Generated Table 3 28 Availability of Pointer Sequences Table 3 29 Status Lines for Poi
5. AU 4 1 cols 1 4 7 Overhead External Add uu None JO RS Trace ie TEK CTS850 Sello o 1 Sync Status Message G 812 Transit 10101010 Column 1 Column 4 Column u 111107110 az 00101000 Jo USER set to B1 xxx xo ox Et 00000000 Ft 00000000 11111111 D1 00000000 pz 00000000 D3 00000000 Hl kx kkk x x H2 wR KAKA x x H3 e kK KKK kx x x Default BZ eee e e e x Ki 00000000 kz 00000000 00000000 D4 00000000 ps 00000000 be 00000000 A D7 00000000 bs 00000000 D9 00000000 010 00000000 011 00000000 D12 00000000 EDIT BYTE st 00009100 00000000 E2 NUI Ex 64k Tx i PATH SECTION APS een Gees SETTINGS JETTINGS OVERHEAD GMa COMMANDS TEST 2of2 Select the byte to edit by using the knob The highlighted byte can be quickly setto these choices by pressing the button next to the desired choice Select EDIT BYTE to change the bits within the byte Figure 2 16 Selecting a Byte for Editing When in edit mode the choices along the right side of the display change see Figure 2 17 The highlight now applies to a single bit CTS850 SDH PDH Test Set User Manual 2 21 Functional Overview 3 To change the value of the highlighted bit select either 1 or 0 Each time you select 1 or 0 the highlighted bit is changed and the highlight moves to the next bit 4 To select a different bit for editing select either the right or left arrow to move the highl
6. Figure 2 34 SDH Results SDH Section Defects from RESULTS menu This completes the tutorial For detailed information on CTS850 capabilities refer to Chapter 3 Reference 2 54 CTS850 SDH PDH Test Set User Manual pm Reference i Hoo O Basic Test Procedures This section gives examples of how to set up and use the CTS850 SDH PDH Test Set for several common telecommunication network applications W Network continuity checking m Transmission signal quality testing m Fault tolerance testing m Performance monitoring m Jitter and wander testing m Video timing quality testing Setting Up the CTS850 This section presents setup instructions for the CTS850 in tables Perform the steps reading from left to right in the table see example below The word none in a cell indicates that no action is required Select Menu Highlight Page Parameter Press Menu Button Select Choice Begin here with Step 1 Step 8 CTS850 Setup is complete Menu buttons are located on the instrument front panel Select menu pages with the buttons below the display Use the knob to highlight a parameter then use the buttons at the right to select a choice Many setups require several iterations of highlighting parameters and selecting choices Some setups may require more than one menu button or menu page selection as well CTS850 SDH PDH Test Set User Manual 3 1 Basic Test Procedures The first step in ea
7. Adjusting Pointers 2 44 The CTS850 enables you to adjust or move pointers Note that pointer movements are not necessarily errors Pointer parameters are set on the POINTERS amp TIMING page of the TRANSMIT menu CTS850 SDH PDH Test Set User Manual Tutorial To display the POINTERS amp TIMING page Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT POINTERS amp none none TIMING see Figure 2 29 Tek Measurements Stopped STM TE TRANSMIT No Sig CHOICES Pointer Timing Mode Pointer Movements i Pointer Type oceans AU Pointer MED Pointer Control ss Set Value Pointer Value set to 522 Max 782 Set with New Data Flag Yes Pointer ss Bits s 10 Default 522 Illegal Max 1 USER DEFINED TRANSMIT 64K Tx DEFECTS amp eee JITTER amp SETTINGS SETTINGS ANOMALIES Sain WANDER Figure 2 29 Example of Pointers amp Timing Page of TRANSMIT Menu Before adjusting a pointer you must decide what mode of pointer movement to use You can change a pointer by adjusting the pointer directly or by using frequency offset The default mode is Pointer Movements which allows you to adjust pointers directly To specify how the pointer will be adjusted Select Menu Highlight Page Parameter Pointer Control Press Menu Button Select Choice CTS850 SDH PDH Test Set User Manual 2 45 Tutorial 2 46 After selecting Single for pointe
8. Press Menu Button TRANSMIT Tek Measurements Stopped TRANSMIT STM 1E Transmit Rate Transmit Clock Transmit Level SDH Structure Payload Structure Test Pattern TxARX SOLU PD eserse Independent ree cake DEFECTS amp POINTERS JITTER amp ars f SAMMER SETTINGS ANOMALIES amp TIMING WANDER COMMANDS Select Menu Highlight Page Parameter TRANSMIT Transmit Rate SETTINGS see Figure 2 23 STM 1 Electrical Internal OdB AU 4 Bulk Bulk Test Signal 0 181 PRBS 2423 1 Normal Select Choice Recall Setup SETTINGS Select Choice STM 1E STM 1E CHOICES STM 4 SIM 1 STM O 140 Mb s Figure 2 23 The TRANSMIT SETTINGS Page of the TRANSMIT Menu CTS850 SDH PDH Test Set User Manual 2 37 Tutorial To set the payload and the test pattern Select Menu Highlight Page Parameter Payload Test Pattern Press Menu Button Select Choice Bulk Equipped PRBS 2720 1 Setting Receive Parameters 2 38 You can set receive parameters two ways The first way is to set the parameters individually display the RECEIVE menu and set each parameter manually on the RECEIVE SETTINGS page The second way is to couple the receive settings to the transmit settings To do this use the Tx Rx Setup line on the TRANSMIT SETTINGS page The Tx Rx Setup line appears on both the TRANSMIT SETTINGS page and the RECEIVE SETTINGS page To couple transmit settin
9. 1 Connect the CTS850 to an NE as shown in Figure 3 5 3 14 CTS850 SDH PDH Test Set User Manual Basic Test Procedures CTS 850 SDH PDH Test Set All Signals are STM 1E Figure 3 5 Setup to Check Pointer Movements CTS850 SDH PDH Test Set User Manual 3 15 Basic Test Procedures 2 Set up the CTS850 as follows Press Menu Button TEST SETUPS TRANSMIT TRANSMIT RESULTS Select Menu Highlight Page Parameter Select Choice RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS TRANSMIT Transmit Rate STM 1E SETTINGS Tx RXx TxRx Setup Coupled POINTERS amp uei Continuous TIMING SDH RESULTS Defects 3 Press the START STOP button on the CTS850 so that the START STOP light is on 4 Verify that there are no errors in the SDH RESULTS display When the front panel ERROR light is not on it also indicates there are no errors in the received signal 5 To check for received pointer movements change the CTS850 setup as follows Press Menu Button RESULTS Select Menu Highlight Page Parameter Select Choice SDH RESULTS Pointers 6 Verify that the CTS850 is counting positive pointer justifications Depending on the clock rate of the NE some negative pointer justifications are also possible 3 16 CTS850 SDH PDH Test Set User Manual Basic
10. 6 Check the front panel status lights to verify that there are no errors alarms or failures 7 Select EXIT to leave the AUTOSCAN dialog box Transmission Signal Quality Testing Measuring Bit Error Rate The bit error rate BER test is one of the best ways to measure the quality of an SDH transmission link You can use the CTS850 to make a BER test on a two way link that is connected in a loop back configuration If this is a test you perform often save it as a pass fail test for easy recall 1 Connect the CTS850 to a network as shown in Figure 3 2 CTS850 SDH PDH Test Set User Manual 3 3 Basic Test Procedures CTS 850 SDH PDH Test Set All Signals are STM 1E One or More SDH NES Figure 3 2 Setup to Check a Transmission Link 3 4 CTS850 SDH PDH Test Set User Manual Basic Test Procedures 2 Setup the CTS850 as follows Select Menu Highlight Page Parameter RECALL DEFAULT INSTRUMENT FACTORY SETUPS SETTINGS TRANSMIT Transmit Rate SETTINGS Payload Tx Rx Setup TEST CONTROL Test Duration 3 Press the START STOP button Press Menu Button TEST SETUPS Select Choice Recall Setup TRANSMIT Bulk Fill Equipped Coupled 15 Minutes SDh Anomalies TEST SETUPS RESULTS 4 While the test is running the CTS8
11. RESULTS MU ete X nex Exe AR 2 53 Figure 2 34 The MAIN RESULTS Page of the RESULTS Men o RR RREREME CHEQUES RAS 2 54 Figure 3 1 Setup to Check Network Continuity 3 2 Figure 3 2 Setup to Check a Transmission Link 3 4 Figure 3 3 Setup to Test Mapping and Demapping 3 7 Figure 3 4 Setup to Check Error and Alarm Response 3 10 Figure 3 5 Setup to Check Pointer Movements 3 15 Figure 3 6 Setup to Check Line Frequency Offset R sSDOlSe uu sud dati ta d cera Ded naci UE AR ced 3 17 Figure 3 7 Setup to Monitor Performance 3 20 xiv CTS 850 SDH PDH Test Set User Manual Table of Contents Figure 3 8 Setup to Check Onset of Errors Jitter Tolerance 4s ieee dee eae oe eS 3 24 Figure 3 9 Setup to Check 1 dB Power Penalty Jitter Tolerance 1 5 eco oboe hm mnn 3 26 Figure 3 10 Setup to Check Clock to Line Jitter Transfer u sosssszbcevrerewrextorxse9 9 ies 3 29 Figure 3 11 Setup to Check Video Timing Quality 3 31 Material below this line appears only in reference manual on CD Figure 3 12 The Test Control Page 3 34 Figure 3 13 Setting a USER DEFINED Test Duration 3 35 Figure 3 14 Elapsed Time and Bar Graph Indicators 3 38 Figure 3 15 The SAVE INSTRUMENT SETUPS Page 3 43 Figure 3 16 The RECALL INSTRUMENT SETUPS Page vens cad acie dabat hd Se eee 302 mad 3 45 Figure 3 17 Selecting a Disk File for Deleting 3 46 Figure 3
12. 3 102 Trace mismatch 3 133 TRANSMIT button 2 11 level electrical 3 78 line code PDH 3 112 CTS850 SDH PDH Test Set User Manual Transmit settings SDH 3 71 PDH 3 107 Tutorial 2 35 V VC4 4c 3 80 3 81 VGA connector G 1 video timing quality testing 3 30 View Help Help dialog box 2 12 W wander 3 159 examples 3 159 generate 3 159 measure 2 MHz clock output from NE 3 159 Index 7 Index Index 8 CTS850 SDH PDH Test Set User Manual
13. 4 6 ppm 3 205 Figure 3 79 The Three Periods of a Pointer Sequence 3 206 Figure 3 80 An Example of a Pointer Sequence 3 207 Figure 3 81 Status Display While Pointer Sequences are RUNING nuts oiu ereeeea dii x eon ee Baia dan 3 215 CTS 850 SDH PDH Test Set User Manual xvii Table of Contents xviii Figure 3 82 Example Pointer Sequence Trib Offset 3 216 Figure 3 83 The APS COMMANDS Page 3 218 Figure 3 84 The RECEIVE Column on the APS COMMANDS Page 3 055 to esp ch xXWEOEECUEPULENE sees 3 228 Figure 3 85 The Test Summary Page 3 231 Figure 3 86 Results SDH Path Defects 3 233 Figure 3 87 Results PDH Anomalies 3 233 Figure 3 88 Results SDH Pointers 3 234 Figure 3 89 Results SDH G 826 Analysis 3 234 Figure 3 90 Results PDH G 826 Analysis 3 235 Figure 3 91 Results SDH M 2101 1 Analysis 3 235 Figure 3 92 Results PDH M 2100 Analysis 3 236 Figure 3 93 Results G 821 Pattern Bit Analysis 3 236 Figure 3 94 Bar Graphs Showing Code Violations and Errored Seconds eeeeee 3 244 Figure 3 95 Line Graph Showing Pointer Value 3 245 Figure 3 96 On Off Graphs Showing Failures and Alarms cse uece c ease ween UR SE elt ee ee 3 246 Figure 3 97 Elements of a History Graph 3 249 Figure 3 98 Changing th
14. Appendix C Check all Specifications Specifications Appendix D Verify the test set functions properly Incoming Inspection Test Appendix E Check examples of instrument setups test Example Disk Contents results and pass fail tests that can be loaded into Appendix F the test set Explain Rear Panel Connectors Rear Panel Connectors Appendix G Change Optical Port Connectors Changing Optical Port Connectors Appendix H Pack for Shipment Packing for Shipment Appendix I CTS850 SDH PDH Test Set User Manual 35 36 Navigation Paper based manual and CD ROM Where to Find Information in this User Manual Cont Look in this part of the If you want to know how to manual Review telecommunications Telecommunications technology used by the test set Technology Appendix J Look up word meanings in Glossary review Glossary and ITU T ITU T standards used by the test set Standards CTS850 SDH PDH Test Set User Manual ES gom Setting Jitter Wander Parameters This section gives examples of how to work with Jitter Wander test setups Setting Jitter or Wander Generation Setting Jitter Receive Parameters and Calibrating Jitter Systems Refer also to the Telecommunications Technology section within the Appendices located on reference on CD for theory of operation information on Jitter amp Wander CTS850 SDH PDH Test Set Jitter Wander Working with Test Setups You can use the CTS850 to run the f
15. Setting the Receive Rate 4 sida sec ic pg 84 ewes ees 3 120 CTS 850 SDH PDH Test Set User Manual Table of Contents Independent Receive and Transmit Settings 3 121 Coupling Receive and Transmit Settings 3 121 Specifying the AU to Test lt ci ccc eeieedae eda ta deaeees 3 123 Setting the SDH Structure 4s RR said dem qued re grs 3 124 TU Undet Lese eve Vert eot o oot ESSERE EN 3 125 Setting the Payload 212i te tesa Tace hp us 3 126 Setting the Test Patter lt cone e eed YR Yo oC IR RO 3 127 Selecting Active Channel Selection 4 3 128 Selecting the Payload Drop 0 0 00 e ee eee eee 3 128 Selecting Tx Rx SetUD aas o bon HERO A a a ewes 3 129 Selecting Signal Status deua aee ER Awad ERROR EU C 3 130 Checking Received Optical Power or Received Peak Voltage 3 132 Selecting Analysis Configuration 00 3 133 Demapping a PDH Signal 0 2 0 02 e eee 3 135 Dropping a PDH Sienal ss eee Ge YOR e x Ron he aed 3 138 Viewing Overhead ByleS i e ssessaeskeecu Nx RERSKERYAVE Nd 3 139 Viewing Section Overhead Bytes 3 139 Viewing Path Overhead Bytes 0055 3 140 Displaying the J1 Path Trace Message 3 140 Displaying the J2 Path Trace Message 3 141 Displaying the V5 Byte 5 vod se Rr eb bs SOL 3 141 Dropping DCC and User Channel Overhead Bytes 3 142 Controlling th
16. Tek Running Od Oh m 23s PR2M TE Cum a e STM 1E Results Source Current Results Results Rate STM 1 Results Structure Test Signal 0 181 Results Payload 34 Mb s Test Started 20 25 28 28 Jan 01 Elapsed Time Od Oh om TROUBLE SCAN No Alarms No Errors TEST SDH PDH HISTORY SAVE RECALL ems RESULTS RESULTS GRAPHS RESULTS RESULTS l Figure 2 27 The Message Line and Test Status Indicator Inserting Errors Now that the test is running you will insert some errors and see how the CTS850 responds To set the error insertion parameters first display the Defects amp Anomalies page as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT Defects amp none none Anomalies see Figure 2 28 2 42 CTS850 SDH PDH Test Set User Manual Tutorial Tek Measurements Stopped Fm TRANSMIT amp No Sig CHOICES Error Type set to Ls CE Error Rate set to s 1 0e 4 DESREI TU BIP 2 Transmit Alarm set to MS RDI LP REI Transmit Failure set to Loss of Signal Pattern Bit Ke Press INSERT ERROR to insert a single error into the transmitted signal SETTINGS SETTINGS EEIUINIE ay TIMING WANDER rl 64k Tx EE A usd Figure 2 28 The Defects amp Anomalies Page of the TRANSMIT Menu There are two ways to insert errors into the transmitted signal You can insert errors one at a time or you can set a rate at which the CTS850 inserts errors automatic
17. W Start frequency m End frequency m Number of frequency samples m Tolerance criteria The results are displayed in numerical and graphical form The CTS850 provides two methods to measure the tolerance of a network element to jitter applied at its input m Onset of errors method m 1 dB power penalty BER method These methods are fully specified and described in the ITU T Recommendation O 171 test set standard CTS850 SDH PDH Test Set User Manual 3 23 Basic Test Procedures Onset of Errors Method The onset of errors method measures the error output of a network element when jitter is applied to its input If there are two or more Errored Seconds in a 30 second time interval then the CTS850 plots the jitter frequency and amplitude on a graph and compares it to a mask you can choose 1 Connect the CTS850 to the network element as shown in Figure 3 8 CTS 850 SDH PDH Test Set These two signals are STM 1E Figure 3 8 Setup to Check Onset of Errors Jitter Tolerance 2 Set the transmit and receive signals to STM 1E 3 24 CTS850 SDH PDH Test Set User Manual Basic Test Procedures 3 Setup the CTS850 as follows Select Menu Highlight Page Parameter JITTER amp Output J itter WANDER J ITTER TESTS Test Type Test Control Press Menu Button TRANSMIT
18. amp Anomalies Inserting 3 192 setting 3 190 CTS850 SDH PDH Test Set User Manual Alternate Pointer Direction 3 195 Analysis Configuration Rx 3 133 Anomaly definition 2 29 Asynchronous 2 27 AU Under Test specifying TX Settings 3 79 RX Settings 3 123 Automatic Protection Switching APS 3 217 APS Mode 3 217 K1 Byte 3 218 K2 Byte 3 222 AUTOSCAN 2 16 3 66 Basic Test 3 1 Fault Tolerance Checking 3 9 Jitter Testing 3 23 Network Continuity Checking 3 2 Performance Monitoring 3 19 Transmission Signal Quality Testing 3 3 Video Timing Quality Testing 3 31 Baud Rate REMOTE CONTROL 3 268 Beeper MISC SETTINGS 3 263 buttons AUTOSCAN 3 66 CLEAR HISTORY 2 4 3 67 HELP 2 14 INSERT ERROR 2 2 menu 2 12 ON STBY 1 13 1 14 Index 1 Index POINTER ACTION 3 195 PRINT 3 265 START STOP 22 3 37 C CAS and Voice RX 3 156 CLEAR HISTORY button 2 5 Cleaning instructions K 1 CMI Transmit Line Code 3 112 connecting signals 2 10 connectors connecting electrical signals 2 16 connecting optical signals 2 16 front panel 22 rear panel 2 4 Continuous Test Duration 3 33 controls front panel 22 rear panel 2 4 G 1 cooling requirements D 32 Coupled Tx Rx Settings RX 3 129 TX 3 87 D Data Communication Channel DCC 3 99 DCC G4 adding 3 99 dropping 3 142 External Add 3 114 D1 D3 data bytes 3 100 D4 D12 data bytes 3 100 F1 data bytes 3 100
19. amp Error Type RS Bl Anomalies Error Rate setto 1 0E 5 RESULTS SDH RESULTS SDH Anomalies CTS850 SDH PDH Test Set User Manual 3 11 Basic Test Procedures 3 12 3 Setup the downstream CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS RECEIVE RECEIVE Receive Rate STM 1E SETTINGS RESULTS SDH RESULTS Defects 4 Press the START STOP buttons on both the upstream and downstream CTS 850 units so that the START STOP lights are on 5 Verify that RS B1 BIP errors are counted in the SDH RESULTS display of the upstream CTS850 6 Verify there are no errors counted in the SDH RESULTS display of the downstream CTS850 7 Press the START STOP buttons on both the upstream and downstream CTS850s so that the START STOP lights are off 8 To check the LTE response to an MS AIS alarm change the upstream CTS850 as follows Select Menu Highlight Page Parameter Defects amp Error Rate set to Anomalies Transmit Alarm set to Press Menu Button TRANSMIT Select Choice RESULTS SDH Defects CTS850 SDH PDH Test Set User Manual Basic Test Procedures 9 Change the downstream CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice Results Main Results SDH Defects none 10 Press the START STOP buttons on both the upstream and downstream C
20. 00 00 eae 3 253 Saving Test Results to Disk 0000055 3 253 Recalling Test Results from Disk 3 256 Deleting Test Results from Disk sss 3 257 Recalling Test Results from Memory 3 258 Printing Results ex v2 85 haere ene bap ee ee ews 3 258 Printing Main Results or Error Analysis 3 258 Printing History Graphs 5 oto Sado SR cot Ce 3 260 Changing Instrument Settings 3 261 Viewing the Instrument Configuration 3 261 Setting the Display Brightness 00000 3 262 Turning the Beeper On and Off 004 3 263 Set ne the Date Sov dese ce teed e ee o at oa er odd 3 264 Sette Le 4 03 e alee eaten eee eee yee Basses Ser 3 264 Changing the Printer Setup i543 CERA RISE RC e 3 265 Specifying the Printer or File Type 3 266 Setting RS 232 Parameters ox deest EID Ine ees 3 266 Setting the Print User amp Company Text 3 268 Setting Remote Control Parameters 0000 3 268 Setting the GPIB Address eee eee 3 269 Setting RS 232 Parameters ss oaccece teen textum 3 270 Running Instrument Self Tests 3 arva er inion Oh eee weave 3 272 CTS 850 SDH PDH Test Set User Manual xi Table of Contents Appendices Appendix A Menu Maps eee A 1 Appendix B Status and Error Messages B 1 Appendix C Default Factory Setting
21. 18 The SAVE PASS FAIL TESTS Page 3 47 Figure 3 19 Entering Fail If Conditions 3 55 Figure 3 20 The TEST BEGIN Dialog Box 3 58 Figure 3 21 Selecting a Pass Fail Test for Deleting 3 61 Figure 3 22 The AUTOSCAN Dialog Box Showing Signal Structure 623 20 Suisacddew bey oe kewic Ee d es 3 64 Figure 3 23 Viewing Tributary Signal Structure 3 65 Figure 3 24 The Meaning of the Icons in the Autoscan Dialog Box eee 3 66 Figure 3 25 Front Panel Status Lights 3 67 Figure 3 26 Transmit Settings Menu 3 71 Figure 3 27 Sequence for Setting SDH Signal Parameters 543229922 dera fee PEE HUS 3 72 Figure 3 28 Sequence for Setting SDH Signal Parameters When Mapping a PDH Signal 3 72 Figure 3 29 SDH Transmit Rates 3 74 Figure 3 30 CTS 850 in Through Mode 3 76 CTS 850 SDH PDH Test Set User Manual XV Table of Contents xvi Figure 3 31 Choosing TU Under Test from SDH Structure 3 80 Figure 3 32 Choosing VC 4c from SDH Structure 3 81 Figure 3 33 Choosing SDH Output 3 83 Figure 3 34 Mapping a Tributary Signal 3 87 Figure 3 35 Editing the User Word Byte 3 91 Figure 3 36 Editing the S1 Section Overhead Byte 3 93 Figure 3 37 Editing an Overhead Byte 3 94 Figure 3 38 Editing the J1 Path Trace Byte
22. Dropping Data from the DCC 3 143 Figure 3 59 Dropping the User Channel Data Byte 3 144 Figure 3 60 Sequence for Setting PDH Signal Parameters non demuxed e 3 147 Figure 3 61 Sequence for Setting PDH Signal Parameters when demultiplexing a PDH Signal demuxed 3 147 Figure 3 62 64k RX Settings cece eee 3 148 Figure 3 63 PDH Signal Receive Rates 3 150 Figure 3 64 RX CAS amp Voice eere 3 156 Figure 3 65 Example of TEST SETUP Jitter amp Wander 3 160 Figure 3 66 Example of TEST SETUP BER Method 3 164 Figure 3 67 Example of TRANSMIT Jitter menu 3 170 Figure 3 68 RECEIVE Setting Jitter Mode Peak to Peak 5 ux 212 wckeek e E EREREE YER oe d 3 175 Figure 3 69 Jitter High Pass Filters 3 178 Figure 3 70 RESULTS Jitter and Timing Quality 3 181 Figure 3 71 RESULTS Wander and Line Frequency 3 182 Figure 3 72 Example of UTILITY Calibration 3 183 Figure 3 73 Example of Transmit Defects amp Anomalies 3 186 Figure 3 74 Set Anomaly Defect Failure layer in the Mux cham sx Rx m ea nta en 3 193 Figure 3 75 Manual Pointer Control Choices 3 196 Figure 3 76 Alternating Burst Pointer Movement 3 198 Figure 3 77 Incrementing Pointer Location Once Every Two Milliseconds eese 3 203 Figure 3 78 Offsetting the Transmit Rate by
23. Getting Started 4 Check that you have the proper electrical connections The CTS850 power requirements are listed in Table 1 3 Table 1 3 Power Requirements Voltage Range Frequency Range 90 132 V 50 60 Hz 180 250 V 50 60 Hz 100 132 V 400 Hz 5 Connect the proper power cord from the rear panel power connector see Figure 1 4 to the power system Turning On the CTS850 To properly turn on the CTS850 1 Press the front panel ON STBY button see figure 1 5 The ON STBY button controls power to all instrument circuits The CTS 850 performs an internal self test each time it is turned on When turned on it displays a screen that states whether or not it passed the self test If the self test passes the status display screen is removed after a few seconds 2 Check the self test results If the self test fails contact your local Tektronix Service Center for assistance CTS850 SDH PDH Test Set User Manual 1 13 Getting Started P Tektronix CTS850 SDH Test Set oNSTY ie JUCIUC3ICJUCIUCIUCI Figure 1 5 ON STBY Button Turning Off the CTS850 Press the ON STBY button to turn off the CTS850 1 14 CTS850 SDH PDH Test Set User Manual Operating Basics a Hoo O Functional Overview This section describes how to use and navigate through the basic functions of the CTS850 including Controls indicators and connectors Elements of the display Menu structu
24. JITTER TESTS Number Freq as appropriate Samples Points dependent on Start End frequencies NOTE You can calibrate a 0 dB baseline as described in ITU T 0 171 prior to measuring transfer jitter if the folllowing conditions are met the jitter generation output and measurement input are both set to line and if the transmit and receive rates are set to the same rate If either of the conditions can not be met skip to step 10 5 Verify that the jitter generation output and measurement input are both set to Line 6 Verify that the transmit and receive rates are set to the same rate 3 166 CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters 7 To calibrate a O dB baseline Press Menu Select Menu Highlight Button Page Parameter Select Choice TESTSETUPS JITTER TESTS Action Calibrate 8 Press the START STOP button to run the 0 dB baseline calibration routine This takes about 3 minutes 9 To run the transfer jitter test after the calibration is complete press Edit Setup Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Action Jitter Transfer 10 Press the START STOP button to run the jitter transfer test The results are displayed on screen in numerical and graphical form This takes abouts 4 minutes for 7 samples Press View Data to see the data and whether or not the test passed Press Edit Setup to return to Main Jitter Test me
25. Mb s 8 2 DEMUX 2 Mb s Drop amp Add Figure 2 20 PDH Multiplexing by steps showing add drop function 140 Mb s 2 28 CTS850 SDH PDH Test Set User Manual Functional Overview Anomaly Defect Failure Alarm Anomaly The smallest discrepancy which can be observed between the actual and desired characteristics of an item The occurrence of a single anomaly does not constitute an interruption in the ability to perform a required function Defect The density of anomalies has reached a level where the ability to perform a required function has been interrupted Defects are used as input for performance monitoring the control of consequent actions and the determination of fault cause Failure The inability of a function to perform a required action persisted beyond a maximum time allocated Alarm The maintenance signal used in the digital network to alert downstream equipment that a defect or equipment failure has been detected SDH Multiplexing Principles The multiplexing principles of SDH follow m Mapping A process used when tributaries are adapted into Virtual Containers VCs by adding justification bits and Path Overhead POH information m Aligning This process takes place when a pointer is included in a Tributary Unit TU or an Administrative Unit AU to allow the first byte of the Virtual Container to be located m Multiplexing This process is used when multiple
26. Menu Button RECEIVE Select Choice Wideband Highband Fullband m Select Wideband to measure jitter using the wideband measure ment filter 500 Hz 1 3 MHz m Select Highband to measure jitter using the highband measure ment filter 65 kHz 1 3 MHz m Select Fullband to measure jitter over the wideband range plus very low frequency jitter that may affect timing quality for Video PBX and GSM systems that derive an internal reference from the supplied line signal 10 Hz 1 3 MHz CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters NOTE Separate Highband National and Highband Standard settings are available for the 2 Mb s rate as referenced in the ITU T standards If you select the Fullband jitter input filter perform the following steps to set the filter high pass frequency Select Menu Highlight Page Parameter JITTER amp Fullband WANDER High pass Press Menu Button RECEIVE Select Choice Note that the lock time for 1 Hz and 10Hz settings are longer than other filter settings Setting the Jitter Hit Threshold The jitter hit threshold determines the sensitivity of the Jitter Hit Seconds measurement which is based on peak to peak jitter Jitter Hit Seconds is a count of how many seconds the threshold was exceeded since the beginning of the the measurement Measurement will normally begin between 2 5 seconds after the start button on the fron
27. Reading Files on Disk You can display disk file names in three places the RECALL INSTRUMENT SETUPS page and the RECALL PASS FAIL TESTS page of the TEST SETUPS menu and the RECALL RESULTS page of the RESULTS menu To view instrument setups files on a disk 1 Insert the disk into the disk drive 2 Press the TEST SETUPS front panel button to display the TEST SETUPS menu 3 Select the RECALL INSTRUMENT SETUPS page 4 Select Disk to display the instrument setups on disk To view pass fail files on a disk 1 Insert the disk into the disk drive 2 Press the TEST SETUPS front panel button to display the TEST SETUPS menu 3 Select the RECALL PASS FAIL TESTS page 4 Select Disk to display the pass fail tests on disk To view test results files on a disk 1 Insert the disk into the disk drive 2 Press the RESULTS front panel button to display the RESULTS menu Select the RECALL RESULTS page x 4 Select Disk to display the test results files on disk NOTE Disk operations may take several seconds if there are many files on the disk The light on the front of the disk drive turns off when the disk operation is complete CTS850 SDH PDH Test Set User Manual Functional Overview Synchronous Plesiochronous Asynchronous To understand correctly the concepts and details of SDH it is important to be clear about the meaning of Synchronous Plesiochro nous and Asynchronous In a set of Synchronous signals th
28. Select Buttons 2 12 CTS850 SDH PDH Test Set User Manual Functional Overview Selecting Pages To select a page within a menu press the button beneath the page tab located at the bottom of the display see Figure 2 10 Tek Measurements Stopped er E TRANSMIT ISTM 1E CHOICES Transmit Rate STM 1 Electrical Transmit Clock Internal Transmit Level SDH Structure TU12 Floating Async TU Under Test TUG3 21 TUGZ 1 TU12 1 TU Background Fill Idle OxD 5 Payload Structure 2 Mb s PCM30 CAS CRC Test Pattern PRBS 2423 1 Normal Tx Rx Setup Coupled GARANE SETTINGS ANOMALIES amp TIMING WANDER ene O4k Tx Jours RIMIS JITTER amp OlOUCOIOVUOIO Page Tab Display the page by pressing the button below the page tab Figure 2 10 How to Display a Page CTS850 SDH PDH Test Set User Manual 2 13 Functional Overview Displaying Help 2 14 To display help press the HELP front panel button When the HELP dialog box appears use the knob to select the topic you wish to view see Figure 2 11 After you select the topic to view select View Help to see the help screen Tek Measurements Stopped E STM 1E eee STM 1E View Help t Use the knob to select the type of Help required then press View Help Press EXIT to leave Help Change Running A BER Test Language Running a Pass Fail Test Saving Results to Disk Printing Results Current Language Englis
29. Select Choice TEST SETUPS J itter Tolerance Edit Setup Mask Type Start Frequency End Frequency Number Freq Samples Tolerance Criteria 4 Press the START STOP button on the CTS850 so that the START STOP light is on as appropriate as appropriate as appropriate as appropriate Onset of Errors As the test is running the jitter tolerance graph is displayed on the screen The results of each frequency point will also be displayed The test stops automatically after it has completed The CTS 850 will also display whether the test passed or failed CTS850 SDH PDH Test Set User Manual 3 25 Basic Test Procedures 3 26 1 dB Power Penalty Method The 1 dB power penalty method uses the BER to measure the amount of jitter that is equivalent to a 1 dB loss of signal power at the optical input of a network element 1 Connect the CTS850 to the network element as shown in Figure 3 9 CTS 850 SDH PDH Test Set All Signals are STM 1 Variable optical attenuator Figure 3 9 Setup to Check 1 dB Power Penalty Jitter Tolerance CTS850 SDH PDH Test Set User Manual Basic Test Procedures 2 Setup the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT JITTER amp J itter Output Line WA
30. Set User Manual Setting Jitter Wander Parameters Selecting the Jitter Range The jitter range determines the maximum measureable jitter and the resolution of the measurement To select the range Select Menu Highlight Page Parameter JITTER amp J itter Range WANDER Press Menu Button RECEIVE Select Choice Extended m Select Normal to measure jitter up to 6 UIp p with a resolution of 0 005 UI frequency dependent Refer to RX Range Mask in Specifictions section in Appendix m Select Extended to extend the jitter measurement range up to 200 Ulp p frequency dependent with a resolution of 0 01 UI Selecting the Jitter Input Filter You can choose from three types of jitter measurement high pass filters defined by ITU T standards wideband highband and fullband The passbands for the filters shown in Figure 3 80 are dependent on the signal or clock rate settings the 3 dB frequencies are described in the Specifications located in the Appendices at the back of this book The ITU T standard that applies to jitter input filters is contained in G 823 Table 1 Measurement Filter Bandwidth CTS850 SDH PDH Test Set User Manual 3 177 Setting Jitter Wander Parameters 3 178 F ullband Wideband Highband Frequency Figure 3 80 Jitter High Pass Filters To select the jitter input filter Select Highlight Parame MenuPage ter JITTER amp J itter Measurement WANDER Filter Press
31. Table 1 1 Where to Find Information in this User Manual Cont Look in this part of the If you want to know how to manual Appendices reference manual on CD only Review available menu choices Navigate menus Menu Maps Appendix A Interpret Status amp Error Messages Status amp Error Messages Appendix B Review Default Factory Settings Default Factory Settings Appendix C Check all Specifications Specifications Appendix D Verify the test set functions properly Incoming Inspection Test Appendix E Check examples of instrument setups test Example Disk Contents results and pass fail tests that can be loaded into Appendix F the test set Explain Rear Panel Connectors Rear Panel Connectors Appendix G Change Optical Port Connectors Changing Optical Port Connectors Appendix H Pack for Shipment Packing for Shipment Appendix I Review telecommunications Telecommunications technology used by the test set Technology Appendix J Look up word meanings in Glossary review Glossary and ITU T ITU T standards used by the test set Standards 1 6 CTS850 SDH PDH Test Set User Manual Getting Started First Time Operation This section describes how to set up the CTS850 for the first time Installing the Accessory Pouch The CTS850 ships with an accessory pouch that mounts on top of the instrument The pouch is not installed at the factory To install the accessory pouch 1 Place the CTS850 on a table or work be
32. Test Procedures Response to Line Frequency Offset Pointers also accommodate differences in line frequency from one NE to another In this example the CTS850 transmits a signal at an offset line frequency to an NE and measures the response 1 Connect the CTS850 to an NE as shown in Figure 3 6 CTS 850 SDH P DH Test Set All Signals are STM 1E Figure 3 6 Setup to Check Line Frequency Offset Response CTS850 SDH PDH Test Set User Manual 3 17 Basic Test Procedures 2 Set up the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS TRANSMIT TRANSMIT Transmit R ate STM 1E SETTINGS Tx RXx TxRx Setup Coupled TRANSMIT POINTERS amp EZEN Frequency Offset TIMING Mode Offset Mode Mode Line Frequency Offset To Stress 4 6 ppm RESULTS SDH RESULTS none Network Defects Section Defects Path Defects 3 Press the START STOP button on the CTS850 so that the START STOP light is on 4 Verify that there are no errors in the SDH RESULTS displays When the front panel ERROR light is not on it also indicates there are no errors in the received signal 5 To check that the NE is generating pointer movements change the CTS850 setup as follows Press Menu Select Me
33. about jitter wander generation capability To set the modulation frequency Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT JITTER amp Jitter Frequency as appropriate WANDER m Select USER DEFINED to specify a jitter frequency different from the predefined choices Use these choices Course to adjust most significant digit or change decade scale Medium to adjust second digit Fine to adjust third digit NOTE To generate jitter set the Jitter Frequency to 10 Hz or greater To generate wander set the Jitter Frequency to less than 10 Hz CTS850 SDH PDH Test Set User Manual 3 173 Setting Jitter Wander Parameters To set the modulation amplitude in unit intervals Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT JITTER amp J itter Amplitude 300 00 UI Max WANDER 150 00 UI Max 2 0 0 UI Select USER DEFINED to specify a jitter amplitude different from the predefined choices Use choices Coarse Medium or Fine Measure Wander on a 2 MHz clock output from a network element When generating wander synchronize the test system to an external timing source This can be done by connecting a 2 048 MHz clck to the rear panel reference timing input and selecting timing source under TRANSMIT settings Follow the steps below 3 174 Connect 2 MHz reference clock to 2 Mbps 2 MHz reference clock input on Rear Panel of test unit Connect Exter
34. lower order path layer signals are adapted into a higher order path signal or when the higher order path signals are adapted into a Multiplex Section m Stuffing SDH has the ability to handle various input tributary rates from PDH As the tributary signals are multiplexed and aligned some spare capacity has been designed into the SDH frame to provide enough space for all these various tributary rates Therefore at certain points in the multiplexing hierarchy this space capacity is filled with fixed stuffing bits that carry no information but are required to fill up the particular frame CTS850 SDH PDH Test Set User Manual 2 29 Functional Overview 2 30 The figure on the next page illustrates the ITU T SDH multiplexing structure The notations in the boxes such as C 1 VC 3 and AU 4 are explained in the table after the figure Not all containers and rates shown in this figure are specifically handled by the CTS 850 test unit At the lowest level containers C are input to virtual containers VC The purpose of this function is to create a uniform VC payload by using bit stuffing to bring all inputs to a common bit rate ready for synchronous multiplexing Various containers ranging from VC 11 at 1 728 Mb s to VC 4 at 139 264 Mb s are covered by the SDH hierarchy Next VCs are aligned into tributary units TUS where pointer processing operations are implemented These initial functions allow the payload to be mul
35. s PCM3 0 CAS CRC 5TM 0 page Test Pattern um M PRBS 2 23 1 LJ IL X RX Setup eese Selected TRANSMIT DEFECTS amp POINTERS JITTER amp page is highlighted SETTINGS BR ANOMALIES amp TIMING WANDER CENE EIE EIE mres Pages are uu oe X additional identified by Pages of the choices are page tabs Menu available Figure 2 6 Specific Elements of the Display Table 2 1 provides a list of icons that appear on the display Icons are used to identify information indicate instrument status and clarify available actions CTS850 SDH PDH Test Set User Manual 2 7 Functional Overview Table 2 1 Icons that Appear in the Display Icon Meaning Transmitted signal Received signal C am CTS850 is in through mode r re CTS 850 is in coupled mode PY Ucet Use the knob Not allowed File stored on disk File stored in memory Message or warning identifier e EC Press the button to perform the indicated action The CTS850 is busy 2 8 CTS850 SDH PDH Test Set User Manual Functional Overview The Basic Menu Structure The CTS850 is controlled primarily through its menu system Though several controls are located on the front panel such as INSERT ERROR most functions are controlled from one of the five menus Figure 2 7 shows the five menus Tek Measurements Stopped RESULTS Tek Measurements Stopped RECEIVE Tek Measurements Stopped TRANSMIT Tek Measu
36. the input to the output of a network element m Select Pointer Jitter to measure jitter in PDH signals due to pointer movement in the SDH signal this test does not use jitter generation The remaining parameters are dependent on the type of jitter test you select CTS850 SDH PDH Test Set User Manual 3 161 Setting Jitter Wander Parameters Jitter Tolerance Test Follow these additional steps to set up a jitter tolerance test 1 Set the Test Type to Jitter Tolerance and set the mask type as appropriate The available masks depend on the rate as shown in the table below Rate Available Masks 2 Mbit s G 823 Standard G 823 National 34 Mbit s G 823 45 Mbit s G 824 140 Mbit s G 823 STM 0 GR 253 STM 1 G 825 G 958 Type A G 958 Type B STM 4 G 825 G 958 Type A G 958 Type B f your CTS 850 test set supports the 45 Mb s option The CTS850 modulates the transmitted line or clock frequency with sinusoidal jitter The jitter generator begins at the start frequency and stops at the end frequency 2 To set the start frequency for the jitter generator Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Start Frequency as appropriate 3 162 CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters 3 The available end frequencies are dependent on the current transmit rate To set the end frequency for the jitter generator Press Menu Select Me
37. to Monitor Performance 2 Setup the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS RECEIVE RECEIVE Receive Rate STM 1 SETTINGS TRANSMIT TRANSMIT Tx Rx Setup Through Mode SETTINGS RESULTS ERROR none SDH G 821 ANALYSIS Analysis 3 Press the START STOP button on the CTS850 so that the START STOP light is on 4 As the test is running the analysis of Regenerator Section errors continually updates You can also look at the analysis of 3 20 CTS850 SDH PDH Test Set User Manual Basic Test Procedures Multiplexer Section Path or Payload errors by pressing the buttons corresponding to those choices 5 To see network performance data since the start of the test presented in graphical form change the CTS850 setup as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice RESULTS HISTORY none none GRAPHS 6 The CTS850 history coverage is based on storage interval which is determined by TEST SETUP You can choose history graphs of the measured performance indicators in the following categories Error count any error you choose Errored seconds any error you choose Pointer justifications Pointer value All failures All alarms CTS850 SDH PDH Test Set User Manual 3 21 Basic Test Procedures 3 22 7 Forexample to change the bottom graph to display the histo
38. 1 00000000 b12 00000000 s 000m0000 00000000 E2 00000000 TRANSMIT SECTION SETTINGS OVERHEAD Figure 2 32 The Display in Edit Mode DONE To change the value of any bit within the byte highlight the bit you wish to change To change the value of the highlighted bit select either or 0 After you assign a value to the highlighted bit the highlight moves to the next bit to be edited Edit the S1 byte to read 10101010 Select DONE when you have finished editing the byte You can assign preset values to the highlighted byte For example rather than editing each bit of the byte as you just did you could also have selected Set to 10101010 To see that the CTS850 is now receiving the new value of the S1 byte Press Menu Select Menu Highlight Button Page Parameter Select Choice RECEIVE SECTION none none OVERHEAD CTS850 SDH PDH Test Set User Manual 2 51 Tutorial Verify that the section overhead for columns 1 4 and 7 is displayed If it is not Press Menu Button Select Menu Highlight Page Parameter Showing Overhead for Look at the value of the S1 byte You will see that it is 10101010 as previously set Select Choice Cols 1 4 7 Viewing Test Results 2 52 The test has been running for several minutes and errors have been transmitted To see the test results you must display the RESULTS menu To display the RESULTS menu Press Menu Select Menu
39. 21 Service Quality J 13 Figure J 9 Simple SDH PDH network model J 17 Figure J 10 Jitter as viewed on an oscilloscope J 20 Figure J 11 Phase variation between two signals J 21 Figure J 12 Frequency ranges of jitter and wander J 21 Figure J 13 Example of TIE wander measurement J 23 Figure J 14 Functional definition of MTIE J 24 Figure J 15 Example of MTIE wander measurement J 25 Figure J 16 Functional definition of TDEV J 25 Figure J 17 Example of TDEV wander measurement J 26 CTS 850 SDH PDH Test Set User Manual xix Table of Contents List of Tables XX Table 1 1 Where to find Information 1 4 Table 1 2 Fuse and Fuse Cap Part Numbers 1 12 Table 1 3 Power Requirements 1 13 Table 2 1 Icons that Appear in the Display 2 8 Table 2 2 CTS 850 Disk File Types 2 25 Table 2 3 SDH Multiplexing Structure 2 31 Table 3 1 LTE Responses to Errors and Alarms 3 10 Material below this line appears only in reference manual on CD Table 3 2 Test Duration Limits 3 36 Table 3 3 Actions You Cannot Perform While a Testis Running sivi eux Rak Ra 3 39 Table 3 4 Fail If Conditions of a Pass Fail Test 3 50 Table 3 5 Green Status Lights 3 67 Table 3 6 Red and Yellow Status Lights
40. 50 counts errors and errored seconds and then calculates the error ratio for each error type or errored seconds 5 After 15 minutes have elapsed the test stops automatically and the measured results are held on the SDH RESULTS page until another test is started 6 When the test is complete you can store the test results to disk or print out a hardcopy To save the test results to disk you must enter a name for the disk file as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice RESULTS SAVE RESULTS EDIT NAME 7 Enter an eight character name for the file CTS850 SDH PDH Test Set User Manual 3 5 Basic Test Procedures 8 If you wish you can also enter a description of the test results by highlighting Description and selecting EDIT TEXT 9 Save the test results to disk as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice IL Save to Disk Save Current Testing Mapping and Demapping All PDH rates The following map demap procedure applies to all PDH rates in the CTS 850 test set 2 Mb s 8 Mb s 34 Mb s 45 Mb s and 140 Mb s The example is written in terms of a 2 Mb s signal but the basic test procedure would be the same in all other PDH rates To test that a 2 Mb s signal is correctly mapped into an SDH signal you would use a Bit Error Rate test However testing mapping demapping requires a different test setup than that described on page 3 3 In thi
41. 8 video timing 3 31 K K1 Full Byte APS 3 218 K2 Full Byte APS 3 222 Index 4 maximum error rates PDH signals 3 188 SDH signals 3 188 TU mappings 3 188 menu pages 2 9 menus maps A 1 RECEIVE 2 11 RESULTS 2 11 selecting 2 12 TEST SETUPS 2 11 TRANSMIT 2 11 UTILITY 2 11 Model INSTR CONFIG 3 261 monitoring performance 3 18 multiplexing asynch J 6 SDH definition 2 29 N Nx64 3 107 3 147 Navigation of manual 1 4 O Offset Mode POINTERS amp TIMING 3 195 1 1 APS COMMANDS 3 217 1 N APS COMMANDS 3 217 optical connections 2 15 optical port connections changing H 1 Optical power received 3 132 Options INSTR CONFIG 3 261 CTS850 SDH PDH Test Set User Manual Index overhead bytes editing 3 91 viewing 3 139 overhead PRBS test 3 105 P packaging for shipment I 1 pages selecting 2 13 parameters changing 2 17 Parity PRINTER SETUP 3 265 REMOTE CONTROL 3 268 Pass Fail test 3 52 Payload 3 84 drop 3 128 framing PDH setting 3 152 specifying 3 114 mapping demapping RX PDH 3 138 TX PDH 3 87 specifying RX 3 126 TX 3 84 PDH definition 2 28 drop 3 138 Mapping signal 3 87 Demapping signal 3 135 inserting defect amp anomaly 3 192 path analysis 3 133 payload frequency Signal Status RX 3 130 RX parameters 3 147 TX parameters 3 107 Dropping signal 3 138 CTS850 SDH PDH Test Set User Manual Peak voltage received 3 132 pe
42. BILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES p Table of Contents CTS 850 SDH PDH Test Set General Safety Summary ceres XXV Prelate csucsra t m xxix Getting Started Product Description s 255 ay siya eda e ds eee Sic eee ete 1 1 PLO CESSOUICS eu Cod ph Yeh aR gh iG AS utah qu Sean Die dels 1 2 Standard Accessories 5 6 4 5 siccae mm heme 1 2 Optional Accessories aue eb x duck ec y a Pob cR 1 3 Navigation through Manual 0 000 eee ee eee 1 4 First Time Operation 224 euet os Vath obs ehm Nee obo rete 1 7 Installing the Accessory Pouch lesus 1 7 set ng Updhe C TS 830 cet reeset Oo et oreo es 1 11 Turning On the CTS 850 ai see gre eaves Uae te P em T en 1 13 Turning Off the CTS 850 55 x4 Uh ee REIS d 1 14 Operating Basics Functional Overview eee 2 1 Front Panel Controls Indicators and Connectors 2 2 Rear Panel Controls and Connectors 0000 2 4 Front Panel Status Lights euexienessteev ec easter eee ess 2 4 Reading the Display s osi sop dod CA EX GRE Qe NBI ME Rn 2 6 The Basic Menu Stru
43. F2 data bytes 3 101 date setting 3 264 Index 2 Day Test Duration 3 35 Decrement Pointer Direction 3 195 default settings C 1 Defects amp Anomalies 3 185 Defect definition 2 29 disk drive 2 25 disk file names reading 2 26 disk file types 2 25 Display Brightness MISC SETTINGS 3 262 displaying results 3 229 E EDIT BYTE K1 Full Byte 3 218 K2 Full Byte 3 222 editing binary numbers 2 21 bytes 2 21 decimal numbers 2 19 text 2 22 electrical connections 2 2 2 4 entering text 2 22 Error Analysis 3 229 G 821 Results 3 229 G 826 Results 3 229 M 2100 Results 3 229 M 2101 1 Results 3 229 Error Count Fail If condition 3 48 Errors Inserting 3 185 error messages B 3 error rate 3 188 maximum 3 188 Error Ratio Fail If condition 3 48 Error type set to ERRORS amp ALARMS 3 185 CTS850 SDH PDH Test Set User Manual Index Errored Seconds Fail If condition 3 48 example disk contents F 1 external clock input 2 Mb or 2 MHz G 7 external monitor connector G 1 F Fail If conditions Pass Fail Test 3 48 Failure definition 2 29 Failure Fail If condition 3 49 Failures TX 3 191 FAS Error Threshold 3 133 files disk 2 23 Firmware Revision INSTR CONFIG 3 261 Flow Control PRINTER SETUP 3 265 Frequency Offset Pointer Timing Mode 3 195 POINTERS amp TIMING 3 195 front panel controls 2 2 fuse 1 12 G GPIB connector G 3 GPIB par
44. Figure 2 15 Entering a Numeric Value 2 20 Figure 2 16 Selecting a Byte for Editing 2 21 Figure 2 17 Editing a Byte LL 2 22 Figure 2 18 Selecting a Text String for Editing 2 23 Figure 2 19 Editing a Text String 2 24 CTS 850 SDH PDH Test Set User Manual xili Table of Contents Figure 2 20 PDH multiplexing by steps 2 28 Figure 2 21 SDH multiplexing hierarchy 2 31 Figure 2 22 Setup for the Tutorial 2 36 Figure 2 23 The TRANSMIT SETTINGS Page of the TRANSMIT Menu cece cece ee enone 2 37 Figure 2 24 The TEST CONTROL Page of the UTILITY Ment Cou cveecxeo RENE EE REEF E CREE RE 2 39 Figure 2 25 The TEST SUMMARY Page of the RESULTS Menu 5 34500 600 cheese ee eels RASSE 2 40 Figure 2 26 The MAIN RESULTS Page of the RESULTS Men ies rk I hh RES 2 41 Figure 2 27 The Message Line and Test Status Indicator 2 42 Figure 2 28 The Defects amp Anomalies Page of the TRANSMIT Menu cece eee eens 2 43 Figure 2 29 Example of POINTERS amp TIMING Page of the TRANSMIT Menu cc cece eee eeceee 2 45 Figure 2 30 Adjusting Frequency Offset Using the Knob 2 48 Figure 2 31 The SECTION OVERHEAD Page of the TRANSMIT Men ks kere e ie Saws neh Ss 2 49 Figure 2 32 The Display in Edit Mode 2 51 Figure 2 33 The TEST SUMMARY Page of the
45. HGICES SDH Section Defects USES etwor OOF SEES sts Os Detects Section RSS DIM i eate Os Defects Path MS AIS Leste Os Defects MS RDI eet Os SDH Anomalies Pointers TEST PDH HISTORY SAVE RECALL f SUMMARY RESULTS GRAPHS RESULTS RESULTS l Figure 2 26 SDH Results SDH Section Defects from RESULTS menu The SDH or PDH RESULTS page contains a listing of the different errors that can occur Since you have not started your test yet the values are those of the last test run To continue with the test setup select TEST SUMMARY Begin the Test Note at the top of the display the message Measurements Stopped When you start the test this message will change To start the test press the front panel START STOP button Once a test starts the display changes in two ways First the message Running appears at the top of the display see Figure 2 27 This message line is always visible so you know that a test is running even if a page is displayed that doesn t contain any information about tests Second the test status indicator appears There are two elements to the test status indicator The text above the bar graph indicates how long the test has been running The text lists the days hours minutes and seconds the test has been running The bar graph indicates what percentage of the test is complete except when the test duration is set to continuous CTS850 SDH PDH Test Set User Manual 2 41 Tutorial
46. Highlight Button Page Parameter Select Choice RESULTS TEST SUMMARY none The TEST SUMMARY page identifies the most common errors that the CTS850 has detected You will see a line that identifies the worst error rate detected and may find listings for other types of errors see Figure 2 33 CTS850 SDH PDH Test Set User Manual Tutorial Tek Measurements Stopped STM 1E CHB STM 1E Results Source Current Results Results Rate STM 1 Results Structure Test Signal 0 181 Results Payload 2 Mb s Test Started 20 02 12 28 Jan 01 Elapsed Time Od Oh om TROUBLE SCAN No Alarms No Errors TEST SDH PDH HISTORY SAVE RECALL f ENSEM RESULTS RESULTS GRAPHS RESULTS RESULTS l Figure 2 33 The TEST SUMMARY Page of the RESULTS Menu The SDH or PDH RESULTS page displays all the errors that have been detected It also displays the error ratio and the number of errored seconds that have been logged see the following figure To display the SDH or PDH RESULTS page Press Menu Select Menu Highlight Button Page Parameter Select Choice SDH or PDH none none RESULTS CTS850 SDH PDH Test Set User Manual 2 53 Tutorial Tek Measurements Stopped STM TE CUTE amp STM 1E z CHOICES SDH Section Defects Network OOF SEFS m Defects Section RS TIM aene Os Defects Path MS AIS Os Defects Os SDH Anomalies Pointers TEST PDH HISTORY SAVE RECALL SUMMARY RESULTS GRAPHS RESULTS RESULTS
47. If the preset choices do not match what you need use USER DEFINED to define an alternative To define a specific frequency offset Select Menu Highlight Page Parameter Press Menu Button Select Choice USER DEFINED When you select USER DEFINED the knob is assigned to adjust the frequency offset Two choices are available in this mode Coarse and Fine see Figure 2 30 Coarse adjusts the frequency offset by 10 ppm Fine adjusts the frequency offset by 0 1 ppm The larger the value for frequency offset the more often the pointer is adjusted CTS850 SDH PDH Test Set User Manual 2 47 Tutorial Tek Running Od Oh 5m 15s em E STM 1 TRANSMIT Pointer Timing Mode Frequency Offset Offset Mode ee Offset Line coarse Frequency Offset Ro Fine DONE TRANSMIT POINTERS SETTINGS amp TIMING Figure 2 30 Adjusting Frequency Offset Using the Knob Use the knob to change the value of Frequency Offset select any value you wish When you are finished selecting a frequency offset Select Menu Highlight Page Parameter Press Menu Button Select Choice To turn off frequency offset Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT POINTERS amp Frequency Offset Default Oppm TIMING Selecting Default Oppm sets the Frequency Offset back to 0 ppm 2 48 CTS850 SDH PDH Test Set User Manual Tutorial Viewing Sect
48. Menu Highlight Page Parameter CALIBRATION Calibration Control To calibrate the jitter generation system Select Menu Highlight Page Parameter CALIBRATION System Routine Press Menu Button UTILITY Select Choice J itter Measurement Press Menu Button UTILITY Select Choice J itter Generation All STM 0 STM 1 STM 4 2 Mb s 34 Mb s 45 Mb s 140 Mb s Analog output Calibration Control Jitter Generation for all rates takes about 45 minutes to run A status message indicates that the calibration is running has completed and has passed or has failed CTS850 SDH PDH Test Set User Manual a Ho O Index Index Check other sources for finding information within this CTS850 SDH PDH Test Set user manual Navigation of Manual table on page 1 4 Menu Maps beginning on page A 1 and Table of Contents located in the front of the manual 2 Mb s RX 3 147 TX 3 107 2 Mb s 2 MHz connection 3 77 G 7 34 Mb s RX 3 147 TX 3 107 45 Mb s map demap 2 33 64k RX settings 3 148 TX settings 3 108 140 Mb s RX 3 147 TX 3 107 A accessories optional 1 3 standard 1 2 accessory pouch installing 14 Active Channel Selection 3 128 Added Tx Clock Overhead Add Drop Port G 4 Added Tx Data Overhead Add Drop Port G 4 adding a PDH signal 3 87 adjusting pointers 3 195 Alarm Fail If condition 3 48 Alarms definition 2 29 PDH Defect
49. NDER J TEST SETUPS Test Type J itter Tolerance Edit Setup Mask Type as appropriate as appropriate as appropriate Number Freq as appropriate Samples Tolerance Criteria BER Record Error Measure BER Threshold 3 Observe the Current BER and Recommended BER values in the display Increase the optical attenuation until the Current BER reaches or exceeds the Recommended BER 4 When the Current BER exceeds the Recommended BER Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Record Error Record BER Threshold 5 Reduce the optical attenuation by 1 dB 6 Press the START STOP button on the CTS850 so that the START STOP light is on CTS850 SDH PDH Test Set User Manual 3 27 Basic Test Procedures The CTS850 applies progressively increasing jitter to the input until the Current BER reaches the threshold you set At that time the test stops automatically and the results are displayed Testing Clock to Line Jitter Transfer This test measures the transfer function for jitter in the output of a network element relative to jitter in its clock The CTS850 generates a 2 MHz G 703 clock signal containing jitter that is connected to the network element The CTS850 also generates a jitter free test pattern connected to the input of the network element Then the CTS850 receives the output from the network element and analyzes its performance You can specify several paramete
50. S850 to save instrument setups pass fail tests measurement results and measurement histories The CTS850 reads disks formatted in MS DOS format It reads only 1 44 MB disks The CTS850 does not format disks Files written to disk consist of four types as shown in Table 2 2 Table 2 2 CTS850 Disk File Types File File Type Description Extension Instrument S etups Complete instrument settings SET Pass Fail Tests Complete instrument settings opera TST tor prompts and Fail If conditions Measurement Results ASCII file listing the results ofa test RES Measurement History Binary file containing history of test HIS J itter Tolerance ASCII file listing results of a confor JTL Conformance Tests mance test Microsoft Excel compatible file XTL containing test and mask data J itter Transfer ASCII file listing results of a confor JTR Conformance Tests mance test Microsoft Excel compatible file XTR containing test and mask data Pointer J itter ASCII file listing results of a confor PTR Conformance Tests mance test Output J itter ASCII file listing results of a confor OUT Conformance Tests mance test 1 The CTS850 creates two files with extensions RES and HIS when you save measurement test results The CTS850 displays only file names with the extensions shown in Table 2 2 Disk files with any other extensions do not appear in file name displays CTS850 SDH PDH Test Set User Manual 2 25 Functional Overview 2 26
51. SER DEFINED choice see Figure 2 14 Tek Measurements Stopped amp STM IE TRANSMIT STM 1E CHOICES Pointer Timing Mode Pointer Movements i Pointer Type ess AU Pointer and Pointer Control oe Set Value Pointer Value set to 522 Max 782 Set with New Data Flag Yes Pointer S Bits s 10 Default 522 Illegal Mas ed Selecting USER DEFINED allows USER you to enter a DEFINED numeric value TRANSMIT 64K Tx DEFECTS amp Mae MESE JITTER amp SETTINGS SETTINGS ANOMALIES raai iiia WAN DER Figure 2 14 Selecting USER DEFINED After you select USER DEFINED the buttons at the right side of the display are reassigned as shown in Figure 2 15 CTS850 SDH PDH Test Set User Manual 2 19 Functional Overview Turing the knob Selecting this choice allows the knob changes this value to make large changes quickly Tek Measurements SiNipped Pointer Timing Mode Frequency Offset e aes PRUNUS Hiver ets a Selecting this requency Offset a EES choice allows the Fine knob to make small changes Coarse You must select pont DONE to exit the edit mode TRANSMIT SETTINGS POINTERS amp TIMING Figure 2 15 Entering a Numeric Value After you press USER DEFINED the CTS850 enters edit mode In edit mode you change the value of the highlighted parameter by turning the knob When you have set the parameter to the des
52. TS850 units so that the START STOP lights are on 11 Verify that MS AIS alarm seconds are counted in the SDH RESULTS display of the upstream CTS850 12 With the downstream CTS850 verify that the displayed K1 or K2 bytes are not all zeros 13 Press the START STOP buttons on both the upstream and downstream CTS850s so that the START STOP lights are off 14 To check the LTE response to a HP RDI alarm change the upstream CTS850 as follows Select Menu Highlight Page Parameter Defects amp Error Rate set to Anomalies Transmit Alarm set to Press Menu Button TRANSMIT Select Choice RESULTS CTS850 SDH PDH Test Set User Manual 3 13 Basic Test Procedures 15 Change the downstream CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice RESULTS SDH RESULTS Anomalies 16 Press the START STOP buttons on both the upstream and downstream CTS850 units so that the START STOP lights are on 17 Verify that the HP RDI light is on on the downstream CTS850 Response to Pointer Movements Pointers allow the SDH network to multiplex signals from indepen dent sources even if the signal clock rates differ slightly from each other Within the allowed range pointer movements should have no adverse affect on the performance of the network This example transmits a signal with frequent pointer movements to an NE and checks that the downstream signal is error free
53. Transfer 3 28 Video Timing Quality Testing 0 0 00 0 eee 3 31 Material below this line appears only in reference manual on CD Setting Test Control Parameters 3 33 Setting the Test Time Duration 20006 3 33 Setting a Unique Test Time Duration 3 34 Setting the History Resolution 00000 3 36 Starting and Stopping a Test coo eg 9 Rte qn s 3 37 Making Changes While Running a Test 3 38 Actions You Cannot Perform While Running a Test 3 38 Working with Test Setups eere 3 41 Saving and Recalling Instrument Setups 3 41 Saving Instrument Setups 0 002 e ee 3 42 Recalling Instrument Setups 2 000055 3 44 Recalling the Default Factory Setup 3 45 Deleting Instrument Setups from Disk 3 46 Pass Fail TESIS saa sata de pott en Lond caer oa as ad 3 47 Parameters of a Pass Fail Test 000055 3 47 Fail If Conditions 2 eyed rca d x dor aged THO RUNS 3 48 Creatine a Pass Fail Test 3 352 h pi eek ey Rd Ne sto AN 3 52 Running a Pass Fail Test cece cence ees 3 57 Changing an Existing Pass Fail Test 3 59 Deleting a Pass Fail Test from Disk 3 60 Checking Signal Status eeeee 3 63 Viewing Signal Structure cic cules cate Pe pee xi ad 3 63 Vi
54. User Manual Tektronix 7 CTS 850 Test Set SDH PDH Jitter amp Wander 070 9988 01 This document supports firmware version 2 8 and above Copyright Tektronix Inc 1998 All rights reserved Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 or subparagraphs c 1 and 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 as applicable Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Printed in the U S A Tektronix Inc PO Box 1000 Wilsonville OR 97070 1000 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three 3 years from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In orde
55. a Class 1 laser is safe to view without special eye protection However because other optical signals in your environment may exceed the Class 1 limits we recommend eye protection as a precaution NOTE When performing a loopback test with the CTS 850 and using the 1550 nm laser always use 10 dB of attenuation Always pad the input level to less than 10 dBm To connect optical signals to the CTS850 1 Unscrew the dustcap that covers the optical port on the CTS850 2 Remove the dustcap if present covering the connector on the optical fiber 3 Carefully insert the transmit end of the optical fiber into the RECEIVE port on the CTS850 Line up the key on the optical fiber connector with the cutout on the optical port connector Make sure that the optical fiber connector is fully inserted into the optical port 4 Tighten the optical fiber connector so it does not accidentally come loose during use CTS850 SDH PDH Test Set User Manual 2 15 Functional Overview 5 Carefully insert the receive end of the optical fiber into the TRANSMIT port on the CTS850 line up key Make sure that the optical fiber connector is fully inserted into the optical port 6 Tighten the optical fiber connector so it does not accidentally come loose during use Tighten the connectors only finger tight do not use a tool to tighten the connectors CAUTION To prevent damage to the optical port connectors and to keep them clean always replac
56. a decimal number Frequency Offset 74 3 ppm As a binary number Z1 Byte 10101111 As a text string File Name TEST 34 Selecting Parameters To change a parameter use the knob to highlight it As you turn the knob the highlight moves from parameter to parameter see Figure 2 12 This is the selected parameter It is identified by the location of the highlight Tek Measurements Stopped Sr STM TE e STM 1E Receive Rate esssssss STM 1 Electrical Receive Level seses 6 dB ved de gt SDH Structure eee Q cane TU Under Test sss TUG3 1 M21 TU12 1 Payload Structure 2 Mb s PCM3 0CAS CRC Aj A Tuming Test Pattern s PRBS 2423 1 Normal 140 Mb s the knob Tug Moves the Async highlight to Payload D Off another ayload Drop TU12 Tx Rx Setup Coupled Async parameter RECEIVE 64k Rx SIGNAL ANALYSIS JITTER amp EiuEN MEME SETTINGS STATUS CONFIG WANDER Figure 2 12 Selecting a Parameter The parameter values displayed in high intensity text indicate parameters that you can change If a parameter is displayed in dimmed text it cannot be selected under the current setup CTS850 SDH PDH Test Set User Manual 2 17 Functional Overview Selecting from Lists Most parameters have a group of choices available The choices are presented as a list located along the right side of the display Press the button next to the choice to assign that choice to the highlighted pa
57. ally Before inserting errors you must specify the type of error to be inserted You specify the type of error to be inserted with the Error type set to parameter To set the type of error to insert Select Menu Highlight Page Parameter Error type set to The rate at which errors are inserted is specified on the Error rate set to parameter An error rate of None specifies that no errors are inserted unless the INSERT ERROR button is pressed Any error rate Press Menu Button Select Choice Path B3 BIP CTS850 SDH PDH Test Set User Manual 2 43 Tutorial other than None results in a continuous stream of errors being inserted into the transmitted signal To insert a single error press the INSERT ERROR button located on the front panel When you press the INSERT ERROR button the red ERROR light flashes To insert a continuous stream of errors Select Menu Highlight Page Parameter Error rate setto rate set to Press Menu Button Select Choice Note that the red ERROR light now stays on all the time errors are being detected continually To turn off the automatic error insertion Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT Defects amp Error Rate setto None Anomalies Now that errors are no longer being transmitted the red ERROR light has gone out although the yellow history light is still on To clear the error history press CLEAR HISTORY
58. ameters 3 269 GPIB Primary Address REMOTE CONTROL 3 259 GPIB programming See Program mer Manual CTS850 SDH PDH Test Set User Manual H Handset Interface G 8 Hardware Revision INSTR CONFIG 3 261 HELP button 2 14 Help dialog box 2 14 History graphs display 3 248 panning 3 251 zooming 2 250 History Resolution 3 36 3 248 high 1 second 3 36 3 248 normal 1 min 3 36 3 248 low 15 min 3 36 3 248 Hour Test Duration 3 33 icons 2 8 autoscan meaning 3 66 display meaning 2 8 Illegal Max 1 Pointer Value Set to 3 195 Illegal Max 1 Pointer Value Set to 3 195 Increment Pointer Direction 3 195 Independent Tx Rx Settings RX 3 121 TX 3 73 Initialization Time POINTERS amp TIMING 3 195 installation 1 7 instrument setups creating 3 41 Index 3 Index recalling 3 42 Interface Module INSTR CONFIG 3 261 ITU T standards Glossary section J J1 path trace byte 3 97 jitter calibration 3 183 example of results 3 169 exporting results 3 169 generation turn on 3 170 frequency amp amplitude 3 173 high pass filters 3 178 hit threshold 3 180 input filter select 3 177 inputs amp outputs G 9 input source select 3 176 masks 3 162 mode select 3 176 output selecting 3 172 pointer hit threshold 3 180 printing results 3 169 work with test setups 3 159 jitter testing 3 23 output 3 164 pointer 3 164 tolerance 3 23 transfer 3 2
59. amp Test Alarms Errors Pointers Timing APS reference manual on CD only Generate error conditions set alarms and Setting Alarms and Inserting simulate network failures Errors Chapter 3 Generate Automatic Protection Switching APS Testing Automatic commands and view the network response Protection Switching Chapter 3 Set the duration for a test the resolution of test Setting Test Control history start and stop a test Parameters Chapter 3 Save and recall instrument setups Create and Working with Test Setups run pass fail tests Chapter 3 34 CTS850 SDH PDH Test Set User Manual Navigation Paper based manual and CD ROM Where to Find Information in this User Manual Cont Look in this part of the If you want to know how to manual Change date and time settings printer settings Changing Instrument GPIB RS 232 parameters Run a self test Settings Chapter 3 View Print Save amp Recall Measurements reference manual on CD only Monitor input signal for alarms errors and Checking Signal Status failures indicating current signal status history of Chapter 3 signal status View save recall and print test results Viewing Results Chapter 3 Appendices reference manual on CD only Review available menu choices Navigate menus Menu Maps Appendix A Interpret Status amp Error Messages Status amp Error Messages Appendix B Review Default Factory Settings Default Factory Settings
60. ansmit and receive rates and the number of sample points in the graph Data following the header is comma separated and consists of four values for each sample point in the graph modulation frequency mask amplitude measured amplitude and a status indicator that indicates an over range condition CTS850 SDH PDH Test Set User Manual 3 169 Setting Jitter Wander Parameters Setting Jitter or Wander Generation 3 170 To test the response of a network to jitter you may need to generate SDH signals PDH signals or clock signals that contain jitter You can use the CTS850 to generate any of these signals with a controlled amount of jitter This jitter is a sinusoidal modulation of the line rate or clock rate you can specify the frequency and amplitude of the jitter Wander generation selection is identical to jitter generation except that it applies for modulation frequencies of 10 Hz or less See the following figure Tek Measurements Stopped E STM 1E TRANSMIT 2 Mb s CHOICES Jitter Wander Generation Off Jitter Output we Line Unde 6 50kHz Jitter Frequency Jitter Amplitude 65 0kHz For Jitter Generation Set Jitter Frequency 10 Hz For Wander Generation Set Jitter Frequency 10 Hz 1 30MHz USER DEFINED TRANSMIT 64k Tx DEFECTS amp POINTERS SETTINGS SETTINGS ANOMALIES amp TIMING Figure 3 78 Example of TRANSMIT Jitter menu CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Para
61. ayed Once you have set the transmit and receive parameters and the test time you can begin the test However before starting the test look at the RESULTS menu where the results of the test appear CTS850 SDH PDH Test Set User Manual 2 39 Tutorial 2 40 To display the RESULTS menu Press Menu Select Menu Highlight Button Page Parameter Select Choice RESULTS TEST Summary none The TEST SUMMARY page contains a summary of the current or most recent test see Figure 2 25 Just below the menu name is information about the current or most recent test If the test detected no alarms or errors the CTS850 displays the message No Alarms No Errors Tek Measurements Stopped STM TE CUTE STM 1E Results Source amp Current Results Results Rate STM 1 Results Structure Test Signal 0 181 Results Payload 2 Mb s Test Started 20 02 12 28 Jan 01 Elapsed Time Od Oh om TROUBLE SCAN No Alarms No Errors TEST SDH PDH HISTORY SAVE RECALL f ESSERE RESULTS RESULTS GRAPHS RESULTS RESULTS K Figure 2 25 The TEST SUMMARY Page of the RESULTS Menu The RESULTS menu contains ten pages on which results are displayed TEST SUMMARY SDH or PDH RESULTS ERROR ANALYSIS Performance Analysis JITTER amp WANDER and HISTORY GRAPHS Select SDH RESULTS to see one way test results are displayed see Figure 2 26 CTS850 SDH PDH Test Set User Manual Tutorial Tek Measurements Stopped e STM 1E CHa STM 1E p C
62. ch application setup initializes the CTS850 to a known state Network Continuity Checking With the AUTOSCAN feature of the CTS850 it is easy to make a quick continuity check The continuity check verifies that a SDH network element NE or portion of the network is correctly set up and provisioned and that the signal passes through intact In this example the CTS850 transmits an STM 1E signal into an NE Then the CTS850 receives the output from the NE and verifies that the AU 4 including its payload patterns is intact 1 Connect the CTS850 to the NE as shown in Figure 3 1 CTS 850 SDH PDH Test Set All Signals are STM 1E One or More SDH NEs Figure 3 1 Setup to Check Network Continuity 3 2 CTS850 SDH PDH Test Set User Manual Basic Test Procedures 2 Setup the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS TRANSMIT TRANSMIT Transmit Rate STM 1E SETTINGS 3 Press the AUTOSCAN button The receiver locks onto the output from the NE displays the signal structure and shows information about the content of AU 1 4 Toanalyze the payload pattern select Show Payload The CTS850 detects a PRBS of length 225 1 5 Check the J1 Path Trace for any message
63. cture sse acte oe ead LE 2 9 Whatisa Men ca siiami Sa ag E bey he POE 2 10 Selecting Men s ov 20 sacs eure ee ote tee tam 2 12 Selecting Pages rar ees aun Ven endis ei oce eee dn 2 13 Displaying Help creeerde ax RE RO SORORE 2 14 Connecting Signals 24a 436d us tout RIVE SLE gen 2 15 Connecting Optical Signals ooo tia IUS 2 15 Connecting SDH Electrical Signals usse 2 16 Connecting PDH Electrical Signals 2 16 Enatiatng Autoscan c ves eve teat OE rw RC PRIOR 2 16 Changing Parameters os cus ier eae eeu epu ee tu dei 2 17 CTS 850 SDH PDH Test Set User Manual V Table of Contents Selecting Parameters ost eoseo se outer ee ek foe ees 2 17 Selecting Mom Lists ooa ot DU page e RR AS 2 18 Changing Decimal Numbers 2 0 5 2 19 Changing Binary Numbers 000005 2 21 PMC RIND Tex 1245 nce oration deo iuo bus der ee Ou s dem Duk 2 22 Working with the Disk Drive 2 0000 2 25 Reading Files on Disk 22 4540 C REESE RS RES 2 26 Synchronous Plesiochronous Asynchronous 2 27 Plesiochronous Digital Hierarchy PDH 2 28 Anomaly Defect Failure Alarm 0004 2 29 SDH Multiplexing Principles 000 2 29 Difference in Telecommunications Terms 2 32 45 Mbit s Map Demap Implementation leues 2 33 Tutorial z2cvceerserer hk ERE Sewer ewes ee tree EE RE 2 35 Befor
64. dditional steps to set up a jitter transfer test 1 Set Test Type to Jitter Transfer Set the mask type as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Mask Type as appropriate The available mask types are dependent on the current transmit rate The CTS850 modulates the transmitted line with sinusoidal jitter If the TX menu sets Jitter Output to Clock the Jitter Transfer screen will indicate Unsupported Settings The jitter generator begins at the start frequency and stops at the end frequency 2 The available start frequencies are dependant on the current transmit rate To set the start frequency for the jitter generator Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Start Frequency as appropriate CTS850 SDH PDH Test Set User Manual 3 165 Setting Jitter Wander Parameters 3 The available end frequencies are dependent on the current transmit rate To set the end frequency for the jitter generator Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS End Frequency as appropriate 4 The CTS850 can generate jitter at intermediate frequencies between the start frequency and end frequency To set the total number of frequencies generated including the start and end frequencies Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS
65. duct AN m DANGER Protective Ground ATTENTION Double High Voltage Earth Terminal Refer to Insulated Manual CTS 850 SDH PDH Test Set User Manual xxvii General Safety Summary Certifications and Compliances CSA Certified Power Cords CSA Certification includes the products and power cords appropriate for use in the North America power network All other power cords supplied are approved for the country of use xxviii CTS 850 SDH PDH Test Set User Manual BTA Preface This manual describes how to use the Tektronix CTS850 SDH PDH Test Set This paper based manual along with an accompanying user manual on CD ROM is your primary source of information about how the CTS850 SDH PDH Test Set functions How This Manual is Organized The CTS850 information is divided into four sections Getting Started Operating Basics Reference and Appendices Getting Started provides an overview of the CTS850 and describes first time operation Both the paper based user manual and the reference manual on CD contain this information Operating Basics explains the basic principles of operating the CTS850 The Operating Basics section also includes a tutorial which introduces you to most of the capabilities of the CTS850 test set Both the paper based user manual and the reference manual on CD contain this information Reference provides explanations of how to perform detailed tasks The paper based manual includes information on Basic T
66. e When the test is complete you can save the results print the results or export the results data to bring into a spreadsheet Refer to Saving and Recalling Setups later in this section for more information Setting Up a Jitter Test To set up a jitter test 1 If the jitter test requires the test set to measure jitter use the RECEIVE menu to set the receive parameters that are appropriate for the signal you will be measuring Refer to Setting SDH Receive Parameters for information about this topic CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters 2 If the jitter test requires the CTS850 to generate jitter use the TRANSMIT menu to set the transmit parameters that are appropriate for the signal you will be generating Refer to Setting SDH Transmit Parameters for information about this topic 3 To set the type of jitter test Select Menu Highlight Page Parameter JITTER TESTS Test Type Press Menu Button TEST SETUPS Select Choice Output J itter J itter Tolerance J itter Transfer Pointer J itter m Select Output Jitter to measure the jitter at the output of a network element The output jitter test does not use the CTS850 jitter generation capability m Select Jitter Tolerance to measure the tolerance of the input of a network element to applied jitter this test uses bit error measurement m Select Jitter Transfer to measure the transfer of jitter from
67. e Appendix Leave space around the CTS850 for cooling Verify that the air intake and exhaust holes on the sides of the cabinet where the fan operates are free of any airflow obstructions Leave at least 5 cm 2 in free on each side WARNING To avoid electrical shock be sure that the power cord is disconnected before checking the fuse 3 Check the fuse to be sure it is the proper type and rating see Figure 1 4 The CTS850 works with one of two fuses depending on the AC supply Each fuse requires its own cap see Table 1 2 The CTS850 is shipped with the UL approved fuse installed CTS850 SDH PDH Test Set User Manual 1 11 Getting Started AC Power Connector eC eje ye Ground AC Fuse Figure 1 4 Rear Panel Controls and Connectors Used in Setup See page 2 4 in the next chapter for a labeling of what each rear panel connector is See the appendix on Rear Panel Connections for a more comprehensive explanation of the rear panel connectors Table 1 2 Fuse and Fuse Cap Part Numbers Fuse Tektronix Fuse Cap Tektronix Fuse Part Number Part Number 0 25 in x 1 25 in 159 0046 XX 200 2264 XX UL 198 6 3AG 8A FAST 250 V 5 mm x 20mm 159 0381 XX 200 2265 XX IEC 127 6 3A 250 V f it is necessary to use the extra 5 mm x 20 mm fuse included in the fuseholder the fuse cap must be removed CTS850 SDH PDH Test Set User Manual
68. e Display Update 3 145 Setting PDH Receive Parameters ee 3 147 Steps for Setting Parameters 359 eti ee OR 3 147 Selecting 64k Rx Settings 0 0 0 ccc eee eee eee 3 148 Setting the Receive Rate oos vs REX EESNERE AE NE 3 149 Independent Receive and Transmit Settings 3 150 Coupling Receive and Transmit Settings 3 150 Setting the Receive Level 5 2 sis he equ tne amp 3 152 Setting Payload and Payload Framing 3 152 Specifying the Test Pattern iui sot vane Bhs Sooke Shaw 3 153 Specifying the Payload Drop 0 000 e eae 3 155 Selecting Rx CAS and Voice uu cetexd Re Re Rex x E 3 156 Setting Jitter Receive Parameters 00000 3 157 Setting Jitter Wander Parameters 3 159 Jitter Wander Working with Test Setups 3 159 CTS 850 SDH PDH Test Set User Manual ix Table of Contents Setting Up iter Testor esusen erderen es es eR Ne SS 3 160 Saving and Recalling Results 04 3 169 Printings Results 559 ee ge he eb bees ex enis 3 169 Exporting Results into a Document 3 169 Setting Jitter or Wander Generation 4 3 170 Turning on Jitter or Wander Generation 3 171 Selecting the Jitter Output 454 453 2anet ee ea RS SEN 3 172 Setting the Jitter Frequency and Amplitude 3 173 Measure Wander on 2 MHz cl
69. e Displayed History Graph 3 253 Figure 3 99 The SAVE RESULTS Page 3 255 Figure 3 100 The RECALL RESULTS Page 3 257 Figure 3 101 The PRINT CONTROL Dialog Box 3 259 Figure 3 102 The MISC SETTINGS Page 3 263 Figure 3 103 The PRINTER SETUP Page 3 265 Figure 3 104 The REMOTE CONTROL Page 3 270 Figure E 1 Front Panel Status Lights E 1 Figure G 1 CTS 850 Rear Panel Connectors G 1 Figure G 2 The VGA Video Output Connector G 2 Figure G3 The RS 232 Port eese G 3 CTS 850 SDH PDH Test Set User Manual Table of Contents Figure G 4 The Overhead Add Drop Port G 5 Figure H 1 Removing the Optical Bulkhead Connector H 2 Figure H 2 FC Optical Bulkhead Assembly H 3 Figure H 3 ST Optical Bulkhead Assembly H 3 Figure H 4 DIN 47256 Optical Bulkhead Assembly H 4 Figure H 5 SC Optical Bulkhead Assembly H 4 Figure J 1 Pulse Code Modulation J 3 Figure J 2 Time Division Multiplexing J 4 Figure J 3 Bit amp Byte Interleaving J 5 Figure J 4 Higher Order Multiplexing Hierarchy J 6 Figure J 5 Multiplexing and Digital Transmission J 7 Figure J 6 Asynchronous Multiplexing J 8 Figure J 7 PDH Multiplexing by steps J 9 Figure J 8 Guaranteeing G 8
70. e Turning On the CTS 850 Luuululsuss 2 36 Setting Transmit Parameters e os osgatay tue E SOR Y RP ES 2 37 Setting Receive Parameters 24 4 4 vote eed ee ee 2 38 Setting the Test Time 13s eoo wed Eo toa sexqpeone RE 2 39 Where Test Results Are Displayed Lss 2 39 Bee tlie Test cobi e eee EVA ENQEEENSDORSU EIAS 2 41 Inserts Errors ih sor ser duse corda rte re eR AU 2 42 Adj stine Pointers 3 oi 54 cte x eben bte ep d 2 44 Viewing Section Overhead 4 ess peu HR PR 2 49 Editing the Section Overhead amp 4oseetektes tree EY VERA 2 50 Viewing Test Results 2 aet x dow ente Me Site lc oe 2 52 Reference Basic Test Procedures 4 re hanh Sean 3 1 Setting Up the CUS 8530 5 5 obe tige rete OR date 3 1 Network Continuity Checking 2 4 4qaiendetaeen sds ie ene 3 2 Transmission Signal Quality Testing 4 3 3 Measuring Bit Error Rate 20 0 3 3 Testing Mapping and Demapping 3 6 Fault Tolerance Checking 220 4408 eee EROR A RE ACER 3 9 Response to Errors and Alarms ssessssu 3 9 Response to Pointer Movements 20 5 3 14 Response to Line Frequency Offset 3 17 Performance Monitoring ux aeos d fees e on er eR 3 19 vi CTS 850 SDH PDH Test Set User Manual Table of Contents Jitter Wander Testing uses mex ORS EMR RR EES URS S 3 23 Testing Jitter Tolerance zodiac OE 3 23 Testing Clock to Line Jitter
71. e digital transitions in the signals occur at exactly the same rate There may however be a phase difference between the transitions of the two signals and this would lie within specified limits These phase differences may be due to propagation time delays or wander introduced in the transmission network In a synchronous network all the clocks are traceable to one Primary Reference Clock PRC The accuracy of the PRC is better than 1 in 10 and is derived from a cesium atomic standard If two digital signals are Plesiochronous then their transitions occur at almost the same rate with any variation being constrained within tight limits These limits are set down in ITU T recommenda tion G 811 For example if two networks need to interwork their clocks may be derived from two different PRCs Although these clocks are extremely accurate there is a small frequency difference between one clock and the other This is known as a plesiochronous difference In the case of Asynchronous signals the transitions of the signals do not necessarily occur at the same nominal rate Asynchronous in this case means that the difference between two clocks is much greater than a plesiochronous difference For example if two clocks are derived from free running quartz oscillators they could be described as asynchronous CTS850 SDH PDH Test Set User Manual 2 27 Functional Overview Plesiochronous Digital Hierarchy PDH Traditionally digita
72. e jitter test The results are displayed on screen in numerical form after about 6 minutes CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters Saving and Recalling Results You can save one jitter test result to disk and recall that one test result for later display and analysis If you want to save test results permanently you must save the test results to a disk The CTS850 saves each type of jitter test result with a unique file name extension Because of the unique extensions you can perform different types of jitter tests on a network element and give them a common results file name To save jitter test results Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Test Control Save Results Refer to Saving and Recalling Results for detailed information about using the disk drive to save and recall results Printing Results You can print jitter test results using the Print Last Screen choice in the Print Control dialog box Refer to Printing Results for detailed information about printing Exporting Results into a Document You can export the jitter tolerance and jitter transfer test results in a Microsoft Excel compatible format to produce a graph for your documentation Use the saved files with XTL or XTR for this purpose The file format consists of a header that identifies the type of test the date and time the transmit source the tr
73. e right side of the display change to present predefined text strings if appropriate and the option to edit the text string see Figure 2 18 CTS850 SDH PDH Test Set User Manual Functional Overview Selectthe text string to edit by using the knob e STM 1E Tek Measurements Stopped STM 1E CHOICES Set up the instrument as required hen fill out the parameters below and save to dis or memory None NATIE Luisa niente SEYJP_11 Description sss Ree Clear ei Save to Memory o Select Action Save to Disk voces Select Action SelectEDIT TEXT to EDIT TEXT lt edit the specified text string TESTS SAVE Mm pass raiL TER TESTS Figure 2 18 Selecting a Text String for Editing Text strings not file names may contain both upper and lower case characters Moving the selected characters with the knob on the front panel off the end of the selection string changes between upper and lower case To edit a text string 1 Select the text string by turning the knob until the desired text string is highlighted see Figure 2 18 2 Select EDIT TEXT This places the CTS850 into edit mode When in edit mode the choices along the right side of the display change see Figure 2 19 In edit mode the status line at the top of the display is replaced with a line that displays the characters available for placing into the text string Some characters available for message text are not availab
74. e the dustcaps on the optical port connectors when not using the optical ports Connecting SDH Electrical Signals To connect SDH electrical signals to the CTS850 1 Connect the transmit end of the cable to the RECEIVE connector on the CTS850 2 Connect the receive end of the cable to the TRANSMIT connector on the CTS850 Connecting PDH Electrical Signals To connect electrical signals to the CTS850 1 Connect the transmit end of the cable to the IN connector for the appropriate rate on the CTS850 2 Connect the receive end of the cable to the OUT connector for the appropriate rate on the CTS850 Initiating Autoscan 2 16 Autoscan is a feature that automatically scans the received signal and changes the CTS850 receive settings to match the received signal To initiate the autoscan feature press the AUTOSCAN front panel button For detailed information on the AUTOSCAN function see Checking Signal Status in Chapter 3 Reference One limitation to be aware of is when the CTS 850 autoscans a TU It is unable to directly recognize signals created by lower rate PDH signals but can in later Autoscan steps CTS850 SDH PDH Test Set User Manual Functional Overview Changing Parameters Most of the menu pages in the CTS850 contain parameters or settings that you can change The choices available for a parameter appear in four ways examples in parentheses As a list Test Pattern PRBS 2 23 1 PRBS 2 20 1 As
75. eceive 64k Rx Signal Analysis Jitter amp More Settings Settings Status Config Wander 1 of2 Receive 64k Rx Section Path RX CAS amp More Settings Settings Overhead Overhead Voice 2 of 2 RESULTS Test SDH PDH J iter amp Error Perf More Summary Results Results Wander Analysis Analysis 1o0f2 Test SDH PDH History Save Recall More Summary Results Results Graphs Results Results 2 of 2 UTILITY Misc Printer Remote Instr Self J itter Cal Settings Setup Control Config Test Figure 2 8 Menus and Pages CTS850 SDH PDH Test Set User Manual 2 11 Functional Overview NOTE The only time pressing a menu button does not change menus is when a dialog box is displayed or when you are entering a value for a parameter You must first exit the dialog box or finish entering the value before you can change menus A page usually provides control over a related group of instrument functions or parameters For example the TRANSMIT SETTINGS page in the TRANSMIT menu controls the rate format and active channels of the signal transmitted by the CTS850 However some pages display information rather than provide control over settings for example the pages of the RESULTS menu display various test results Selecting Menus To display a menu press the button with the same on the front panel with the same name see Figure 2 9 C MENUS rl TEST SETUPS TRANSMIT RECEIVE Figure 2 9 Menu
76. ed dropped at an intermediate point and different information is inserted added for subsequent transmission The remaining traffic passes straight through the multiplexer without additional processing CTS850 SDH PDH Test Set User Manual 2 31 Functional Overview Map Demap For the CTS 850 this term refers to putting PDH signals into and getting PDH signals out of a SDH signal Multiplex Demultiplex Multiplex MUX To transmit two or more signals over a single channel Demultiplex DEMUX To separate two or more signals previously combined by compatible multiplexing equipment 2 32 CTS850 SDH PDH Test Set User Manual Functional Overview 45 Mbit s Map Demap Implementation If your CTS 850 test set supports the 45 Mb s map demap option Option 55 the following is an overview of what the 45 Mb s option offers To determine if Option 55 is present in the CTS 850 test set press the Utility button on the front panel then press the Instrument Configuration INST CONFIG softkey In the menu that is displayed after pressing this button and softkey there is a line that says Options In this line should be the number 55 for Option 55 Also in the line that says PDH Options should be the number 45 for 45 Mb s 45 Mbit s is transmitted or received as a B3ZS or HDB3 encoded line rate and mapped or demapped into a VC 3 structure into an STM 1 Mapping and demapping has the same configuration options and nom
77. ely CTS850 SDH PDH Test Set User Manual 3 9 Basic Test Procedures connecting the upstream and downstream signals to the RECEIVE input Table 3 1 shows the responses expected from Line Terminating Equipment LTE such as an STM 4 STM 1 multiplex section terminating element when presented with three possible error and alarm conditions Table 3 1 LTE Responses to Errors and Alarms Expected Down Transmitted Error or Expected Upstream Alarm Response stream Response RS B1 Error none MS AIS AU AIS HP RDI HP RDI LOS AU AIS 1 Connect two CTS850s to an LTE as shown in Figure 3 4 CTS 850 SDH PDH Test Set CTS 850 SDH PDH Test Set All Signals are STM 1E Downstream Upstream Figure 3 4 Setup to Check Error and Alarm Response 3 10 CTS850 SDH PDH Test Set User Manual Basic Test Procedures 2 To check the LTE response to an RS B1 error set up the upstream CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS TRANSMIT TRANSMIT Transmit Rate STM 1E SETTINGS TRANSMIT Defects
78. enclature as the current TU 3 mapping demapping selections available for 34 Mbit s signals An external 45 Mbit s payload is added when the signal is being mapped into an SDH output The user can insert the same defects and anomalies as are supported in a 34 Mbit s externally added signal Demapped payloads are dropped out through the front panel as a 45 Mbit s line rate The payload for 45 Mbit s is PRBS a fixed 8 16 or 24 bit pattern or externally added data only The payload can not be muxed or demuxed from or into DS1 or any PDH rates The same PRBS patterns as for 34 Mbit s are supported Overhead bytes are the same as for TU 3 mapping and demapping The default C2 value is the same for 34 Mbit s 0x04 There is no support for 45 Mbit s bit slip measurements G 821 G 826 and M 2100 analysis is performed on the received 45 Mbit s signal subject to the same restrictions as other PDH signals Because of architectural limitations the PDH rates 2 Mbit s 8 Mbit s 34 Mbit s and 140 Mbit s are not supported at the same time as 45 Mbit s The RX and TX sides of the tributary card are linked at 45 Mbit s The tributary board will run RX and TX at 45 CTS850 SDH PDH Test Set User Manual 2 33 Functional Overview Mbit s or RX and TX at any of the existing PDH rates but 45 Mbit s and 2 8 34 140 Mbit s cannot be turn simultaneously The framing for 45 Mbit s is C Bit M13 or Unframed From the user interface e
79. ency sss 1 30MHz Number Freq Samples 6 Tolerance Criteria BER Penalty Record Error Threshold SELECT ACTION Recommended BER 0 171 gt 4 88e 5 Current BER Threshold 0 00 We Press START STOP to Begin Analysis TEST RECALL RECALL SAVE SAVE cowTRO INSTRUMENT PASS FAIL INSTRUMENT PASS FAIL SETUPS TESTS SETUPS TESTS Figure 3 77 Example of TEST SETUP Jitter Tests BER Method 7 The CTS850 must be connected to a network element through an optical attenuator 8 To set a baseline bit error rate for the measurement Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Record Error Measure BER Threshold 9 Observe the Current BER and Recommended BER values in the display Increase the optical attenuation until the Current BER reaches or exceeds the Recommended BER CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters 10 When the Current BER equals the Recommended BER to within an order of magnitude Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Record Error Record BER Threshold 11 Increase the receive level by 1 0 dB that is reduce the attenuation by 1 0 dB 12 Press the START STOP button to run the jitter test The results are displayed on screen in numerical and graphical form This takes about 6 minutes for 6 points Transfer Jitter Test Follow these a
80. ent Front Cover Tektronix part number 200 3232 XX m 75 Q loopback BNC cable Tektronix part number 012 1338 XX m Pouch to hold printer user manual etc Tektronix part number 016 1266 XX Optional Accessories m CTS 850 SDH Test Set Service Manual Tektronix part number 070 999 1 XX m Electrical STS OE 1E and STM 1 Plug in Standard m FC SC or ST Optical Connectors m 1 6 1 5 connectors for all 75 Ohm BNC front panel connectors m 2 8 34 140 Mbit s VC 12 TU 3 Add Drop Test W Universal European 220 V 50 Hz power cord m UK 240 V 50 Hz power cord m Australian 240 V 50 Hz power cord m North American 240 V 60 Hz power cord m Switzerland 220 V 50 Hz m Hard Transit Case Tektronix part number 016 1157 XX m Soft Carrying Bag Tektronix part number 016 1158 XX m Optical Connector Kit Tektronix part number 020 1885 XX CTS850 SDH PDH Test Set User Manual 1 3 Getting Started Navigation CTS 850 Paper based Manual amp CD ROM 1 4 The following table shows you where to quickly find the section that answers your particular test amp measurement questions In order to get you going as fast as possible with the CTS 850 test set the paper based user manual focuses solely on Getting Started information Everything else appears in the reference manual on CD ROM including all information contained in the paper based user manual Table 1 1 Where to Find Information in this User Manual If you want to k
81. ent has been detected a yellow history light is turned on The yellow history light shows that the associated event occurred at some time in the past Yellow history lights remain on until you reset the event history by pressing the CLEAR HISTORY button starting a new test or changing the Receive Configuration settings Receive Rate Receive Pattern etc Yellow history lights Green lights indicate an event has indicate the occurred condition is true Ae STATUS Z LOS SIGNAL PRESENT O LOF O PATTERN LOCK O LOP LSS o OOF O O PDH AIS erum cj PDH RDI MS RDI ERROR AU AIS POINTER ADJ O HP RDI QO O CLEAR HISTORY Q Red lights indicate an Clear History eventis occurring button clears now history of events Figure 2 4 Status Lights CTS850 SDH PDH Test Set User Manual 2 5 Functional Overview Reading the Display There are several major areas that make up the CTS850 display see Figure 2 5 This area displays the contents of the different pages of each menu Some pages display contre parameters some pages display test results The menu name appears here the Status message Signal menu name is area This area Status always visible is always visible Icons X Indicators Tek Measurements i A on elim Y Transmit Rate usec STM 1 Electrical Transmit Clock oo Internal Transmit Level ueser SDH Structure eee TU Under Test nesse
82. es have elapsed the test stops automatically and the measured results are held on the SDH RESULTS page until another test is started 3 8 CTS850 SDH PDH Test Set User Manual Basic Test Procedures 4 When the test is complete you can store the test results to disk or print out a hardcopy To save the test results to disk you must enter a name for the disk file as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice RESULTS SAVE RESULTS EDIT NAME 5 Enter an eight character name for the file 6 If you wish you can also enter a description of the test results by highlighting Description and selecting EDIT TEXT 7 Save the test results to disk as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice E csi Save to Disk Save Current Fault Tolerance Checking Fault tolerance testing sometimes called stimulus response testing or stress testing is used to ensure that a network responds correctly to various fault conditions Though there are many additional fault conditions you can test with the CTS850 this section covers three common examples m Response to errors and alarms m Response to pointer movements m Response to line frequency offset Response to Errors and Alarms This example uses two CTS850 testers to simultaneously check the upstream and downstream responses to an error or alarm condition You can use a single CTS850 to do the same thing by alternat
83. est Procedures and a detailed look at Jitter Wander Testing All other Reference information is contained in the reference manual on CD The Appendices provide a listing of specifications default factory settings an incoming inspection test a section on telecommu nications technology a listing of relevant ITU T standards and other useful information All Appendices information is contained on the reference manual on CD only CTS850 SDH PDH Test Set User Manual xxix Preface Conventions XXX This manual uses the following conventions The names of front panel controls and menus appear in all upper case letters for example TRANSMIT and HELP Names appear in the same case in this manual as they appear on the display of the CTS850 for example Test Duration and USER DEFINED Within a procedure a specific button to be pressed or a parameter to be selected appears in boldface print For example press the AUTOSCAN button or select Continuous The Tutorial and the Reference sections frequently present procedures in tables Perform the procedure by reading from left to right in the table see example below The word none in a cell indicates that no action is required Select Highlight Menu Page Parameter Step 2 Step 3 Some procedures require several iterations of highlighting parameters and selecting choices Some procedures may require more than one menu button or menu page selection as well Press Me
84. et payload mapping and content check Parameters Chapter 3 received optical signal power view overhead bytes for SDH Set the receive rate receive level framing and Setting PDH Receive test pattern for PDH signals Parameters Chapter 3 Jitter Wander Set TX RX Work with Test Setting Jitter Wander Setups Calibrate Parameters Chapter 3 paper based and reference manual on CD Set amp Test Alarms Errors Pointers Timing APS reference manual on CD only Generate error conditions set alarms and Setting Alarms and Inserting simulate network failures Errors Chapter 3 Generate Automatic Protection Switching APS Testing Automatic commands and view the network response Protection Switching Chapter 3 Set the duration for a test the resolution of test Setting Test Control history start and stop a test Parameters Chapter 3 Save and recall instrument setups Create and Working with Test Setups run pass fail tests Chapter 3 Change date and time settings printer settings Changing Instrument GPIB RS 232 parameters Run a self test Settings Chapter 3 View Print Save amp Recall Measurements reference manual on CD only Monitor input signal for alarms errors and Checking Signal Status failures indicating current signal status history of Chapter 3 signal status View save recall and print test results Viewing Results Chapter 3 CTS850 SDH PDH Test Set User Manual 1 5 Getting Started
85. etting 3 83 SDH multiplexing hierarchy 2 29 Serial Number INSTR CONFIG 3 261 SET DATE MISC SETTINGS 3 264 SET TIME MISC SETTINGS 3 264 Set Value Pointer Control 3 195 Set with New Data Flag POINTERS amp TIMING 3 195 Index 6 settings default C 1 Signal labels 3 104 Signal status checking 3 63 RX 3 130 Signal structure viewing 3 63 Signal State viewing 3 66 signal status indicators 2 6 Specifications D 1 2 34 140 Mb s D 13 Certifications amp Compliances D 36 Environmental D 32 General Specs D 1 Jitter amp Wander D 24 standard accessories 1 2 START STOP button 3 37 Start Stop a test 3 37 status lights front panel 2 5 3 67 red amp yellow 2 5 3 68 status messages B 1 Synchronization Status message S1 byte 3 92 Synchronous 2 27 T Technology telecom J 1 Asynch multiplexing J 6 Basic SDH signal J 1 Error Counts J 13 G 826 M 2101 1 M 2100 G 821 Analysis J 10 Jitter amp Wander Tutorial J 16 PDH Basics J 2 PDH Multiplexing J 9 Principles amp Metrics of Jitter amp Wander J 20 SDH Multiplexing 2 29 test duration setting 3 33 CTS850 SDH PDH Test Set User Manual Index Test Pattern PRBS PDH RX 3 153 PDH TX 3 116 SDH RX 3 127 SDH TX 3 85 test results displaying 3 229 TEST SETUPS button 2 11 working with 3 41 test state indicator 2 7 Through Mode 3 75 Timing changing 3 195 Trace Settings
86. ewing the Payload 5v xes Eae EE asd Fes 4 8S eee S 3 64 Determining the Payload Pattern and Framing 3 65 Printing the AutoScan Dialog Box 3 66 Viewing the Signal State 0 0 0 0 cee eee 3 66 Extended SOS vess oye aneen a i a ae 3 69 Setting the Beeper iusto Vat ine Paes VER ME rie e 3 69 Setting SDH Transmit Parameters 3 71 Steps for Setting Parameters 29e e eos Ghee eee ess 3 72 Setting the Transmit Rate ue nece4 one e OW ro k 4 3 72 CTS 850 SDH PDH Test Set User Manual vii Table of Contents viii Independent Transmit and Receive Settings 3 73 Coupling Transmit and Receive Settings 3 73 Through Mode e bsc oe uta os eed does ecd enixa 3 75 Setting the Transmit Clock 4 525 eb Ve mv OY pew US 3 77 Setting the Line Clock Offset coude taria eee ery er EX 3 78 Setting the Transmit Level 54 acus qe tuit ehe colpa 3 78 Specifying the AU to Test ix ed era Ces aS oe be Pave aan ead 3 79 Setting the SDH Stich 445 dap se Re p omg ut 3 80 TU Under dest sesto Seq Evo EE quU e Ya qa CS eats 3 82 Setting TU Background EMl z 5 ente Ret 3 82 Setting SDH Output isses xd RR e te Rm Rec 3 83 Setting Payload Structure ule Rx URDU Ea EY Yrs 3 84 setting Test Palen sodwessexco sinte he RB ETEEXA NY YN YR 3 85 Setting the Tx Rx SetUpoau eee Li See S ope More E MM 3 87 Mapping a PDH Signal 009 0s 46 40080004098 ee nada 3 87 Setting the Test Patter
87. f 773 qT 3 as 34 Mb s 45 Mb s the five AU AIS ERROR 140 M b s menus m HP RDI Connectors TU AID CLEAR HISTORY 0 pti ona LASER IN LP RDI USE Indicator o O reum Seria N z r Hi e 9 Bulb B TRANSMIT Electrical RECEIVE Optical Connector Connectors Optical Connector Output Input Figure 2 2 Front Panel Controls Indicators and Connectors CTS850 SDH PDH Test Set User Manual 2 3 Functional Overview Rear Panel Controls and Connectors See the appendix on Rear Panel Connections for a more comprehen sive explanation of the rear panel connectors BITS OUT VGA Connector Video J CLK RS 232 CLK ANALOG AC Power Not Used Output OUT Port IN OUT Ground Connector Handset port ow RE rU e Lu Output Bort 2 Mb s or 2 MHz dis Frame Pulse Out Figure 2 3 Rear Panel Controls and Connectors Front Panel Status Lights The status lights make it easy to quickly determine the condition of the received signal There are three types of front panel status lights W Green status lights Green lights indicate whether a signal is present and whether the CTS850 has locked onto the signal 2 4 CTS850 SDH PDH Test Set User Manual Functional Overview m Red status lights When a red status light is on it means that the indicated event is occurring When the red light is off no event is occurring m Yellow history lights Once an ev
88. gs to the receive settings you would use the Tx Rx Setup line on the RECEIVE SETTINGS page To couple the receive settings to the transmit settings Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT TRANSMIT Tx Rx Setup Coupled SETTINGS As soon as you select Coupled the icon in the status area changes to indicate the Tx Rx Setup are coupled If the operator couples from the TRANSMIT SETTINGS menu the TX settings copy to the Receive side of the test unit If the operator couples from the RECEIVE SETTINGS menu the RX settings copy to the Transmit side of the test unit CTS850 SDH PDH Test Set User Manual Tutorial Setting the Test Time Before beginning the BER test you must specify the duration of the test To set the duration of the test Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS TEST CONTROL Test Duration 15 min see Figure 2 24 Tek Measurements Stopped er ME TEST SETUPS STM 1E CHOICES Test Duration occ eee Continuous Normal History Resolution Normal 1 min samples 1 min i F Low At 1 minute resolution the maximum history length 15 min is at least 5 days Upon reaching the 5 day limit new data will begin overwriting the old data High 1 sec AVE SAVE JITTER RUMEN T PASS FAIL T 1 TESTS TESTS Figure 2 24 The TEST CONTROL Page of the TEST SETUPS Menu Where Test Results Are Displ
89. h Press Change Language to see help in English Francais or Deutsch enis J amp ALARMS ER WANDER SS Ce LE Figure 2 11 Help Dialog Box Once you press View Help the help screen for that topic is displayed If a help topic covers more than one page you can display the next page by selecting Page Down To display the previous page select Page Up To display help in a different language select Change Language Then to display help in French select Francais To display help in German select Deutsch To display help in Spanish select Espanol To display help in Portuguese select Portugues When you finish reading the help text you can exit the help dialog box by selecting EXIT If you wish to read additional help topics select Help Menu to return to the main help screen CTS850 SDH PDH Test Set User Manual Functional Overview Connecting Signals To connect signals to the CTS850 use the electrical and optical connectors located at the bottom and right side of the front panel For optical connections the CTS850 accepts both single mode and multimode fiber For electrical connections the CTS850 accepts 75 Q coaxial cable with BNC connectors for SDH rates and 2 Mb s Unbalanced 8 Mb s 34 Mb s and 140 Mb s rates The CTS850 accepts Siemens connectors for 2 Mb s Balanced signals Connecting Optical Signals NOTE The optical TRANSMIT output is produced by a Class 1 laser device The output from
90. hecking Transmission signal quality testing Fault tolerance testing Performance monitoring Jitter and wander testing Video timing quality testing CTS850 SDH PDH Test Set User Manual paper based and reference manual on CD Tutorial Chapter 2 Basic Test Procedures Chapter 3 paper based and reference manual on CD 33 Navigation Paper based manual and CD ROM Where to Find Information in this User Manual Cont Look in this part of the If you want to know how to manual Set TX SDH PDH reference manual on CD only Set transmit rate specify the AU under test set Setting SDH Transmit the payload mapping and content and set the Parameters Chapter 3 overhead bytes for SDH signals Set transmit rate transmit clock line clock offset Setting PDH Transmit payload framing test pattern active channel and Parameters Chapter 3 background pattern for PDH signals Set RX SDH PDH reference manual on CD only Set receive line rate specify the AU under test Setting SDH Receive Set payload mapping and content check Parameters Chapter 3 received optical signal power view overhead bytes for SDH Set the receive rate receive level framing and Setting PDH Receive test pattern for PDH signals Parameters Chapter 3 Jitter Wander Set TX RX Work with Test Setting Jitter Wander Setups Calibrate Parameters Chapter 3 paper based and reference manual on CD Set
91. ighlight Parameter Use the buttons to the right of the display to Select Choice CTS850 SDH PDH Test Set User Manual 2 35 Tutorial Before Turning On the CTS850 This tutorial describes how to perform a bit error rate BER test on an STM 1E signal To perform the tutorial you need a 75 Q coaxial cable with BNC connectors on each end This tutorial assumes you have set up the CTS850 as described in First Time Operation in Chapter 1 Getting Started To set up your CTS850 for the tutorial perform these steps m Check to see that the CTS850 is turned off Connect the coaxial cable between the TRANSMIT and RECEIVE BNC connectors on the front panel see Figure 2 22 CTS 850 SDH PDH Test Set 75 Q coaxial cable Figure 2 22 Setup for the Tutorial Press the ON STBY button to turn on the CTS850 The CTS850 performs its power on self test and then displays the TRANSMIT menu 2 36 CTS850 SDH PDH Test Set User Manual Tutorial Before proceeding with the tutorial initialize the CTS850 as follows Select Menu Highlight Page Parameter Press Menu Button TEST SETUPS RECALL INSTRUMENT SETUPS DEFAULT FACTORY Setting Transmit Parameters Before beginning the BER test set the transmit and receive parameters To set the transmit and receive parameters
92. ight When the desired bit is highlighted select either 1 or 0 5 When you are finished editing the byte select DONE This enters the changes to the byte and exits edit mode Tek Measurements Stopped TRANSMIT STM 1E Transmitting STM 1E with AU 4 1 under test Showing Overhead for AU 4 1 cols 1 4 7 External Add STM TE Change the value of the bit by selecting one of J these choices wR oko ok oA ok ok 00000000 t wow oR Kw Kok ok oko ok ok kk 00000000 00000000 00000000 00000000 E1 00000000 Dz 00000000 HZ e e e e e e x K1 00000000 ps 00000000 bs 00000000 D11 00000000 00000000 perdi ra None Column 1 Column 4 Column 11110110 A2 00101000 i 00000001 Fl 00000000 D3 00000000 H3 oe kk eee Kz 00000000 D6 00000000 bs 00000000 D12 00000000 Ez 00000000 TRANSMIT SETTINGS Select the bit to edit by using the knob Figure 2 17 Editing a Byte 2 22 Entering Text SECTION OVERHEAD L highlighted bit by selecting one of these choices ED aN 1 0 a E gt Change the C D DONE Select DONE when you are finished editing Several parameters such as file names operator prompts and path trace messages consist of text strings You can set text strings to preset choices or enter your own text string When you highlight a text parameter using the knob the choices at th
93. ion Overhead The CTS850 allows you to view the section overhead for the transmitted or received signal To view the section overhead for the transmitted signal press the MORE lof 2 Key softkey at the bottom of the test set screen in order to see more choices Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT SECTION none none OVERHEAD The first line of text under the menu name describes the signal being received and the AU under test see Figure 2 31 Tek Measurements Stopped eM TRANSMIT ISTM 1 CHOICES Transmitting STM 1 AU 4 1 under test Reset Showing Overhead for AU 4 1 cols 1 4 7 Overhead External Add uc None M JO RS Trace sse TEK CTS850 Set to 1 Sync Status Message G 812 Transit 10101010 Column 1 Column 4 Column 7 ai 11110110 az 00101000 Jo USER set to Bl exe E1 00000000 Fi 00000000 11111111 D1 00000000 Dz 00000000 D3 00000000 Hl bkx xxkk xxx H2 ke RAR KKK H3 kA k AA Default EZ kk e e e e Ki 00000000 K2 00000000 D4 00000000 Ds 00000000 D6 00000000 00099090 D7 00000000 bs 00000000 bs 00000000 D10 00000000 B11 00000000 D12 00000000 s1 00000100 00000000 rz BINE EDIT BYTE TRANSMIT 54k Tx PATH SECTION APS OVER SETTINGS SETTINGS OVERHEAD e COMMA DS TEST Figure 2 31 Example of Section Overhead Page of TRANSMIT Menu The Showing Overhead for parameter identifies which c
94. ired value select DONE to enter the value and exit edit mode NOTE The new value does not take effect until DONE is selected When in edit mode the knob can work in several ways As shown in Figure 2 15 the knob can be assigned to make either coarse or fine adjustments to the highlighted parameter For other parameters the knob is assigned to change different elements of the selected parameter For example when setting a test time rather than making coarse or fine adjustments the knob is assigned to change days hours minutes or seconds The knob icon is displayed in solid form to indicate which function it is currently assigned to The knob icon is displayed in outline form next to other possible choices 2 20 CTS850 SDH PDH Test Set User Manual Functional Overview Changing Binary Numbers There are two kinds of binary numbers that can be changed in the CTS850 payload patterns and overhead bytes As with other numerical values you can select preset values or enter specific values by selecting Edit Byte To change a byte 1 Highlight the byte with the knob see Figure 2 16 2 Change the byte by selecting one of the preset choices at the right side of the display or to enter a different bit pattern select EDIT BYTE This places the CTS850 into edit mode Tek Measurements Stopped RM TRANSMIT amp lsTM 1 CHOICES Transmitting STM 1 AU 4 under test Reset Showing Overhead for
95. ith the heels of your hands to bow the plate enough to slide the front of the plate into the space between the cabinet top and the front panel trim see Figure 1 2 7 Move the front of the pouch as needed to line up the slots in the plate with the keys on the front panel 8 Release the pressure on the plate to allow it to return to its normal flat shape 9 Press down firmly to secure the Velcro strip to the top of the cabinet top Velcro Strip Figure 1 2 Inserting the Pouch Under the Front Panel Trim to lift the CTS850 Using the D ring to lift the CTS850 can pull the accessory pouch off the CTS850 resulting in damage to the CTS850 The purpose of the D ring is to provide extra support when the test set is placed in an upright position CAUTION Do not use the D ring see Figure 1 3 on the pouch plate CTS850 SDH PDH Test Set User Manual 1 9 Getting Started DO NOT LIFT Instrument With D Ring Figure 1 3 Location of the D Ring on the Accessory Pouch 1 10 CTS850 SDH PDH Test Set User Manual Getting Started A Setting Up the CTS850 Before you use the CTS850 ensure that it is properly set up and powered on To properly set up the CTS850 do the following 1 Be sure that the environment in which you will operate the CTS850 is within instrument specifications Specifications for temperature relative humidity altitude vibrations and emissions are included in th
96. l transmission systems and hierarchies have been based on multiplexing signals which are plesiochronous running at almost the same speed Also various parts of the world use different hierarchies which lead to problems of international interworking for example between those countries using 1 544 Mbit s systems U S A and Japan and those using the 2 048 Mbit s system In the PDH tributaries and higher order bit streams are allowed to deviate from a pre defined bit rate by a specified amount The justification bit stuffing process is required which brings all the tributaries up to the same bit rate before multiplexing takes place However the justification method makes it impossible to identify the location of specific tributary channels within a higher order bit stream without demultiplexing back down to the 2 Mb s tributaries To recover a 64 kbit s channel from a 140 Mbit s PDH signal it is necessary to demultiplex the signal all the way down to the 2 Mbit s level before the location of the 64 kbit s channel can be identified PDH requires steps 140 34 34 8 8 2 demultiplex 2 8 8 34 34 140 multiplex to drop out or add an individual speech or data channel This is due to the bit stuffing used at each level Extra bits are added stuffed in to the digital tributaries which increases the speed of the tributaries until they are all identical 140 Mb s 140 34 DEMUX 34 140 MUX 34 Mb s 34 Mb s 34 8 DEMUX 8 34 MUX 8
97. le for file names 3 To change the highlighted character or enter a new one select the character to enter by turning the knob CTS850 SDH PDH Test Set User Manual 2 23 Functional Overview 4 Toenter the selected character select Enter character To delete a character already entered use the arrows to highlight the character Select Delete to delete the character 5 When you are finished editing the text string select DONE The characters available depend on the Turning the knob selects the used for file names are a subset of the characters available for message text Select this choice to enter the selected character Characters ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890 Jer nag oa 7 K o peti STM 1E A Pure enfer Select this choice i a nis RU d verhea to delete the xternal Add oon one selected character Delete Path Overhead Path Trace Message M i J1 TEKTRONIX CTS SDH Select either of Bi METERTIIT BONJOUR GUTEN TAG Cc these choices to ee eae pmoete Fz 00000000 c3 highlight within Hagi wee e e e x 1 E MD OUO the text string Kx 00000000 N1 00000000 DONE mE pA A m Select DONE when you The highlighted character is the are finished editing text character that will be changed when Enter is selected Figure 2 19 Editing a Text String 2 24 CTS850 SDH PDH Test Set User Manual Functional Overview Working with the Disk Drive Use the disk drive in the CT
98. meters NOTE The jitter compliance tests available through the JITTER TESTS page of the TEST SETUPS menu automatically set the jitter generation parameters needed for the test When you use the jitter compliance tests you do not need to set the controls described below Periodic calibration of the jitter generation system is recommended to maintain best accuracy You can execute a built in calibration routine before making critical measurements Refer to the Jitter Calibration information located at the end of the this section Turning on Jitter or Wander Generation To turn on jitter or wander generation Select Menu Highlight Page Parameter JITTER amp J iter Wander WANDER Generation Press Menu Button TRANSMIT Select Choice m Select Off to disable jitter wander generation m Select On to enable jitter wander generation CTS850 SDH PDH Test Set User Manual 3 171 Setting Jitter Wander Parameters 3 172 Selecting the Jitter Output To select the signal that you want to apply generated jitter to Select Menu Highlight Page Parameter Select Choice JITTER amp J iter Output i WANDER Clock 0 8 V 2 MHz G 703 Press Menu Button TRANSMIT m Select Line to enable generated jitter on the transmitted line SDH signal or PDH signal that comes out of the front panel This will also generate jitter on the rear panel Jitter Clock Output even though it may not be in use No
99. n User selectable 3 90 Setting Overhead Bytes sceedat4e uU ER SAP XXe ELSES 3 9 How to Edit an Overhead Byte 3 9 Editing the VC4 VC3 and VC12 Overhead Bytes 3 94 Bytes You Cannot Edit yon ecu sae ew eke ee 3 95 Editing the J1 Path Trace Byte i025 s04 080 Re 3 97 Adding DCC and User Channel Overhead Bytes 3 99 Trace Settings uu ceu ey AS oR Ag a alee TA Ree LA SUR A a 3 102 Sigal Labels si Seded duae eant Fed ied tas ome sor S ER de dede 3 104 Overhead PRBS Test csss revo erre de eo ota gra E S S 3 105 Setting PDH Transmit Parameters 3 107 Steps for Setting Parameters a 4 2swhew aise wales ea d eater 3 107 Selecting 64k Tx Settings s voc eo ee pate te ones se ees 3 108 Setting the Transmit Rate oue eae ye Koel QC olus 3 109 Independent Transmit and Receive Settings 3 109 Coupling Transmit and Receive Settings 3 110 Viewing the Transmit Line Code 20 000 3 112 Setting the Transmit Clock faa tie peccet ete ehe c ets 3 112 Setting the Line Clock Offset 24 25 4403 205 2239 Pevensie dd 3 113 Specifying Payload and Payload Framing 3 114 Specifying the Test Pattern wee s oup er a tsed eee ees PERSE 3 116 Setting Jitter or Wander Generation 24 3 118 Setting SDH Receive Parameters 3 119 Steps for Setting Parameters 2 2 0 0 66064 064 cece eee 3 119
100. nal 2 MHz clock to be measured to Jitter Clock input on Rear Panel of test unit Go to TRANSMIT settings Set the Transmit Clock to 2 MHz external The Receive Clock is the Same No Wander Measure ments should be made with Internal Clock Press Start Stop twice to Start Restart the test For RESULTS select the Jitter amp Wander Screen and view Wander Measurements CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters Setting Jitter Receive Parameters You can set the CTS850 to measure jitter or wander on incoming SDH signals PDH signals or clock signals First set the jitter receive parameters below Then you can view jitter or wander measurement results in the Jitter amp Wander Results page shown at the end of this section on Jitter Tek Measurements Stopped STM TE RECEIVE 2 Mb s CHOICES Jitter Mode Peak Peak O Jitter Input Source n n Line Peak Peak Jitter Range wuss Normal GUI RMS Jitter Measurement Filter Wideband 20Hz 100kHz Jitter Hit Threshold 1 00UI Pointer Hit Threshold 10 000ppm sec RECEIVE 64k Rx SIGNAL ANALYSIS MEINES SETTINGS SETTINGS STATUS CONFIG WANDER Figure 3 79 RECEIVE Setting Jitter Mode Peak to Peak NOTE The jitter compliance tests available through the JITTER TESTS page of the TEST SETUPS menu automatically set the jitter receive parameters needed for the test When you use the jitter compliance te
101. nch with the front facing toward you 2 Center the pouch plate and insert the rear edge of the plate in the space between the cabinet top and the rear panel trim see part A of Figure 1 1 3 Move the pouch sideways as necessary to line up the key slots in the pouch plate with the keys on the rear panel the plate is centered when it is aligned and push the plate all the way in see part B of Figure 1 1 4 While keeping the pouch plate pushed under the rear panel trim reach under the pouch plate and carefully remove the backing from the Velcro strip to expose the adhesive on the Velcro strip The Velcro should remain attached to the pouch plate 5 Grasp the pouch plate assembly with both hands near the front of the assembly CTS850 SDH PDH Test Set User Manual 1 7 Getting Started Rear Panel Trim Gap Pouch NB Plate Pouch Plate Velcro Strip Rear Panel f Trim 6 0 Top View A Push the pouch plate into the rear panel trim gap Key Slots Under Rear Panel Trim B Center the pouch plate to align with key slot under the rear panel trim Figure 1 1 Installing the Accessory Pouch 1 8 CTS850 SDH PDH Test Set User Manual Getting Started CAUTION In the next step use only enough force to clear the front panel trim with the plate front edge Excessive force will cause a permanent bow in the plate 6 Push back on the pouch plate and press down w
102. now how to Use the basic functions of the test set including Controls indicators connectors Elements of front panel display Menu structure Online help Connecting signals Selection and editing of choices Disk drive operation Tutorial Setup and use the test set for network and equipment test applications including Network continuity checking Transmission signal quality testing Fault tolerance testing Performance monitoring J itter and wander testing Video timing quality testing Set TX SDH PDH reference manual on CD only Set transmit rate specify the AU under test set the payload mapping and content and set the overhead bytes for SDH signals Set transmit rate transmit clock line clock offset payload framing test pattern active channel and background pattern for PDH signals Look in this part of the manual Functional Overview Chapter 2 paper based and reference manual on CD Tutorial Chapter 2 Basic Test Procedures Chapter 3 paper based and reference manual on CD Setting SDH Transmit Parameters Chapter 3 Setting PDH Transmit Parameters Chapter 3 CTS850 SDH PDH Test Set User Manual Getting Started Table 1 1 Where to Find Information in this User Manual Cont Look in this part of the If you want to know how to manual Set RX SDH PDH reference manual on CD only Set receive line rate specify the AU under test Setting SDH Receive s
103. nter Sequences Table 3 30 Choices for Bits 1 4 of the K1 Byte When Mode is Set to Ring ee Table 3 31 Choices for Bits 1 4 of the K1 Byte When Mode is Set to Span Table 3 32 Choices for Bits 5 8 of the K1 Byte Table 3 33 Choices for Bits 1 4 of the K2 Byte Table 3 34 Choices for Bit 5 of the K2 Byte When Mode is Set to Span eere Table 3 35 Choices for Bit 5 of the K2 Byte When Mode is Set to Ring eere Table 3 36 Choices for Bits 6 8 of the K2 Byte Table 3 37 Results Displayed on MAIN RESULTS Page Table 3 38 SDH Results eeeeeeee Table 3 39 PDH Results eere Table 3 40 Results Displayed on Jitter amp Wander RESULTS Pag 412522152 0d e dw xe e a dee Table 3 41 Error Analysis eere Table 3 42 Performance Analysis Table 3 43 Measurements Displayed as Bar Graphs CTS 850 SDH PDH Test Set User Manual xxi Table of Contents Table 3 44 Measurements Displayed as a Line Graph 3 246 Table 3 45 Measurements Displayed as On Off Graphs for SDH Rates eee 3 247 Table 3 46 Measurements Displayed as On Off Graphs for PDH Rates eee 3 247 Table 3 47 Time Represented by Bars on History Graph 41 4st eE eR Re e e RE ened ERE AOV 3 250 Table 3 48 Lines of Instrumen
104. nu CTS850 SDH PDH Test Set User Manual 3 167 Setting Jitter Wander Parameters 3 168 Output Jitter Test Follow these steps to set up an output jitter test 1 Set Test Type to Output Jitter The recommended time duration for an output jitter test is one minute To set the test duration to one minute or any other duration of your choice Select Menu Highlight Page Parameter JITTER TESTS Test Duration Press Menu Button TEST SETUPS Select Choice 15 sec 30 sec 1 min 15 min USER DEFINED m Select USER DEFINED to enter a time other than one of the preset choices The maximum duration is 99 days 23 hours 59 minutes 59 seconds 2 Press the START STOP button once or twice light should be lit to run the jitter test The results are displayed on screen in numerical form After the test duration time has passed for each filter wideband and highband compare measured jitter with the maximum allowed to determine pass or fail The resolution of these measurements are 0 001 UIpp Pointer Jitter Test Follow these additional steps to set up a pointer jitter test To select Pointer Jitter the TX must be set to a SDH rate and the RX set to a PDH rate 1 Set Test Type to Pointer Jitter To set the pointer sequence type Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Sequence Type as appropriate 2 Press the START STOP button to run th
105. nu Button Select Choice Begin with Step 1 Step 8 CTS850 instruction is complete CTS850 SDH PDH Test Set User Manual Preface Related Manuals The following documents are also available for CTS850 SDH PDH Test Set The CTS850 SDH PDH Reference Manual on CD Tektronix part number 063 3013 01 contains all the user manual information in a portable electronic document format The CTS850 SDH PDH Test Set Programmer Manual Tektronix part number 070 9990 X X describes how to control the CTS850 using an instrument controller Wander Analyst User Manual Tektronix part number 071 0518 XX and Wander Analyst 6 0 PC software Tektronix part number 063 3196 XX for TDEV MTIE analyis This PC application software is bundled with Option 14 Jitter Wander The CTS850 SDH PDH Test Set Service Manual Tektronix part number 070 999 X X provides information on maintaining and servicing your instrument to the module level CTS850 SDH PDH Test Set User Manual xxxi Preface Contacting Tektronix Product Support Service Support For other information To write us xxxii For application oriented questions about a Tektronix measurement product call toll free in North America 1 800 TEK WIDE 1 800 835 9433 ext 2400 6 00 a m 5 00 p m Pacific time Or contact us by e mail tm app suppGtek com For product support outside of North America contact your local Tektronix distribut
106. nu Highlight Button Page Parameter Select Choice RESULTS SDH RESULTS Pointers 6 Verify that negative pointer justifications are being counted 3 18 CTS850 SDH PDH Test Set User Manual Basic Test Procedures Performance Monitoring When a new line is installed you may want to monitor performance for a day or so to be sure it is operating correctly Or if problems are suspected on a line you may want to run a long test to determine the cause of the problem In either case the CTS850 makes it easy to monitor an electrical or optical line without the need for splitters During a test the CTS850 simultaneously takes all performance measurements analyzes the results according to the G 821 standard and displays the measurements and analysis in your choice of three formats m Ina brief summary m Indetail by type defect anomaly alarm failure m In detail by layer regenerator section multiplexer section path In this example the CTS850 is placed directly in line with a live optical signal to monitor performance in an unintrusive mode Through Mode 1 Connect the CTS850 in line with an optical signal as shown in Figure 3 7 CTS850 SDH PDH Test Set User Manual 3 19 Basic Test Procedures CTS 850 SDH P DH Test Set All Signals are STM 1 Figure 3 7 Setup
107. nu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS End Frequency as appropriate 4 The CTS850 can generate jitter at intermediate frequencies between the start frequency and end frequency To set the total number of frequencies generated including the start and end frequencies Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Number Freq as appropriate Samples Number of samples change depending on Start End frequencies 5 To set the tolerance criteria Press Menu Select Menu Highlight Button Page Parameter Select Choice Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS JITTER TESTS Tolerance Criteria Onset of Errors BER Penalty W Select Onset of Errors to define the tolerance as two Errored Seconds in a 30 second time interval m Select BER Penalty to measure the amount of jitter that is equivalent to a 1 dB loss of signal power at the input of the network element optical only CTS850 SDH PDH Test Set User Manual 3 163 Setting Jitter Wander Parameters 3 164 6 If you selected Onset of Errors skip to step 12 If you selected BER Penalty continue with step 7 see the following figure Tek Measurements Stopped STM 1E TEST SETUPS 2 Mb s CHOICES Test Type esee Jitter Tolerance Onset Of Test Control Edit Setup Errors Mask Type ee 0 825 Start Frequency ee 125mHz bere End Frequ
108. ock input from NE 3 174 Setting Jitter Receive Parameters 41g be ev rete 3 175 Selecting the Jitter Mode 1d er rm 3 176 Selecting the Input Source lt x 21x behead e m ee Y Res 3 176 Selecting the Jitter Range vue ros oy RE eS 3 177 Selecting the Jitter Input Filter 0 0 3 177 Setting the Jitter Hit Threshold 3 179 Setting the Pointer Hit Threshold 3 180 Examples of Jitter Measurements Lus 3 181 Examples of Wander Measurements 3 182 Calibrating Jitter Systems 25 mr eR RR RR ARR 3 183 Executing Jitter Calibration 5 2 nc 5 sae eis 3 184 Setting Alarms and Inserting Errors 3 185 Simulating Error Conditions csse e rr rem 3 186 Specifying the Error to Insert 2 45s sues oe is 3 187 Tusertine BITOIS 68d ou esses aut dis Y Sens v uy Gad 3 187 Setin Alar MS sty le oe ocn A i opc ado S rats ca date 3 190 Simulating Transmit Failures llleleleeeeeees 3 191 PDH Defect and Anomaly Insertion 3 192 Setting Pointers and Changing Timing 3 195 Setting Pointers 5605s S659 2 tee vier eae alee 3 195 Manual Pointer Control 12s nn nn 3 196 Continuous Pointer Movement s seus 3 201 Changing Timing osereex dote Ud RSS Ex ESSE 3 203 Generating Pointer Sequences 0 nenne 3 206 Starting Pointer Sequences iius eR RR aeg 3 212 Starting Pointer Seq
109. ollowing types of jitter conformance tests m Jitter Tolerance m Jitter Transfer W Output Jitter W Pointer Jitter SDH rates only In each of these tests the CTS850 measures the jitter on a signal at the output of a network element For some tests the CTS850 generates jitter to stimulate the network or a network element while it simultaneously measures the network response CTS850 SDH PDH Test Set User Manual 3 159 Setting Jitter Wander Parameters 3 160 Tek Measurements Stopped STM TE TEST SETUPS 2 Mb s CHOICES Test Type conico sso CIC output Test Control Edit Setup Jitter Test Duration sessen 1 min 0 sec per filter Jitter No Data Tolerance Jitter Measured Max Allowed Transfer Filter Selection Jitter G 823 Wideband DES 0 000 UI p p taal Highband ee 0 000 Ul p p Jitter Wr Press START STOP to Begin Analysis TEST RECALL RECALL SAVE SAVE INSTRUMENT PASS FAIL INSTRUMENT PASS FAIL CONTROL SETUPS TESTS SETUPS TESTS Figure 3 76 Example of TEST SETUP Jitter amp Wander screen Before selecting a jitter test set the specific jitter generation and measurement rates and payloads required by the test For example to perform an output jitter test on an STM 1 signal set the receive line rate to STM 1 before selecting test setups It is not necessary to set the jitter and wander TRANSMIT or RECEIVE settings since this is done automatically by the CTS850 software depnding on the test typ
110. olumns of the section overhead are displayed To display the overhead for other overhead columns within the signal select the appropriate choice CTS850 SDH PDH Test Set User Manual 2 49 Tutorial Press Menu Button Select Choice Select Menu Highlight Page Parameter Showing Overhead for Editing the Section Overhead 2 50 Except for certain reserved bytes you can edit the bytes of the section overhead of the transmitted signal Reserved bytes are identified by asterisks in the byte content area of the displayed column To edit a byte of the section overhead Select Menu Highlight Page Parameter S1 byte Once you have selected EDIT BYTE the CTS850 enters the edit mode see Figure 2 32 Press Menu Button Select Choice EDIT BYTE CTS850 SDH PDH Test Set User Manual Tutorial Tek Running Od Oh Om 20s E STM 1E Z STM 1E ANS iT Transmitting STM 1E with AU 4 1 under test Showing Overhead for AU 4 1 cols 1 4 7 1 External Add None o Column 1 Column 4 Column 7 Al 11110110 Az 00101000 ci 00000001 El xkok x x ox x ox E1 00000000 Fi 00000000 O gt D1 00000000 bz 00000000 bz 00000000 Hi e e k e oe oe oe HZ wo ck e H3 ok oe oe e e e s oe EZ Dx kk x x o x x Kl DO000000 Kz 00000000 D4 00000000 ps 00000000 De 00000000 e D7 00000000 Bs 00000000 bs 00000000 D10 00000000 B1
111. or or sales office Contact your local Tektronix distributor or sales office Or visit our web site for a listing of worldwide service locations http www tek com In North America 1 800 TEK WIDE 1 800 835 9433 An operator will direct your call Tektronix Inc P O Box 1000 Wilsonville OR 97070 1000 CTS850 SDH PDH Test Set User Manual Getting Started O Getting Started This section provides a description of the CTS850 a list of standard and optional accessories and explains how to operate the CTS850 for the first time Product Description The Tektronix CTS850 SDH PDH Test Set is a rugged portable test set designed for installing and maintaining telecommunications networks The CTS850 is an SDH analyzer that combines bit error rate test capabilities with overhead testing payload mapping and demapping in one unit The CTS850 features the following capabilities STM OE STM 0 STM 1E STM 1 STM 4 2 Mb s 8 Mb s 34 Mb s and 140 Mb s transmit and receive Optical interface available at 1310 nm and 1550 nm Bit Error Rate testing BER test of VC4 4c concatenated payloads at 622 Mbit s 45 Mbit s mapping and demapping into SDH optional BIP error monitoring and analysis 2 8 34 and 140 Mbit s PDH multiplexing demultiplexing MUX DEMUX with N Mx64 kbit s testing Payload mapping and demapping Jitter generation and analysis Wander generation and measurement Real Time Wander Analyst PC application soft
112. pped t GEM TE CUTE e STM 1E E CHOICES Jitter Wideband 500Hz 1 3MHz CURRENT MAX Jitter Peak Peak Jitter 0 015UI 0 015UI Positive Peak Jitter 0 010UI 0 010Ul wander Negative Peak Jitter 0 005UI 0 005Ul Frequency Jitter Hit Seconds 0s Jitter Unlocked Seconds Os Timing Quality Current Freq Drift Rate 0 000ppm sec Max Freq Drift Rate 0 000ppm sec TEST MAIN MEM ERROR dus SAVE RECALL SUMMARY RESULTS GEMOVA ANALYSIS GRAPHS RESULTS RESULTS Figure 3 81 RESULTS Jitter and Timing Quality CTS850 SDH PDH Test Set User Manual 3 181 Setting Jitter Wander Parameters Example of Wander Measurements The max value shows the maximum peak to peak positive peak and negative peak since the beginning of the measurement When measuring wander it is necessary to synchronize the test to an external timing source This can be done by connecting a 2 048 MHz clock signal to the rear panel timing input and selecting the appropriate timing source under the TRANSMIT settings The RESULTS screen for Wander Line Frequency follows Tek Measurements Stopped Er OT METE CHB e STM 1E CHOICES Wander Jitter Peak Peak Wander Ons 0 00UI TIE Ons 0 00UI Wander Frequency Line Frequency DELTA FREQ Current Frequency 155 520002MHz 0 01ppm Max Frequency 155 520004MHz 0 02ppm Min Frequency 155 519998MHz 0 01ppm TEST MAIN JITTER amp ERROR HISTORY SAVE RECALL mm RESULTS SRN ieia a GRAPHS cel RESULTS
113. r control a message displays that tells you how to adjust the pointer Pointer movement alternates between increment and decrement To adjust a pointer press the POINTER ACTION button on the front panel of the test set Each time you press the POINTER ACTION button a pointer adjusts and the POINTER ACTION light turns on Also a message appears at the top of the display that describes the type of pointer movement that occurs On this page you can also adjust frequency offset which may cause a network element to generate pointer movements Be aware that it is necessary to press the Start Stop button the front panel to see all the changes To see the pointer value changing Press Menu Select Menu Highlight Button Page Parameter Select Choice RESULTS SDH or PDH none Pointers RESULTS Now press the POINTER ACTION button again To adjust a pointer using frequency offset Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT POINTERS amp Pointer Timing Frequency Offset TIMING Mode After selecting Frequency Offset note that the available parameters change When in Frequency Offset mode the only parameters that can be set are Offset Mode and Frequency Offset CTS850 SDH PDH Test Set User Manual Tutorial To change the frequency offset of the signal Select Menu Highlight Page Parameter Frequency Offset Offset Press Menu Button Select Choice Stress 4 6ppm
114. r to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTA
115. ral Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified personnel should perform service procedures While using this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system CTS 850 SDH PDH Test Set Injury Precautions Use Proper Power Cord To avoid fire hazard use only the power cord specified for this product Avoid Electric Overload To avoid electric shock or fire hazard do not apply a voltage to a terminal that is outside the range specified for that terminal Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of the product ensure that the product is properly grounded Do Not Operate Without Covers To avoid electric shock or fire hazard do not operate this product with covers or panels removed CTS 850 SDH PDH Test Set User Manual XXV General Safety Summary Use Proper Fuse To avoid fire hazard use only the fuse type and rating specified for this product Do Not Operate in Wet Damp Conditions To avoid electric shock do not operate thi
116. rameter Sometimes parameters have more than five choices available When more than five choices are available the bottom choice changes to more Selecting more displays additional choices Each time you press more the next list of choices is displayed Below more is a line that shows which list of choices is displayed When the last list of choices is displayed pressing more displays the first list of choices again see Figure 2 13 Pressing a button assigns the List of choice nextto the button to Choices the highlighted parameter Tek Measurements Stopped Receive Rate sss Receive Level wuss SDH Structure ees TU Under Test wee Payload Structure sue Test Pattern oe Payload Drop Tx Rx Setup RECEIVE 64k Rx SIGNAL EE MEME SETTINGS STATUS ILL TU12 Floating Async LJ TUG2 1 TU12 1 ILI PCM30 CAS CRC WANDER GS TM TE em STM 1E Electrical CT Normal gt Ly JITTER Selecting more displays additional choices pDiogipoiiiulDi Figure 2 13 Selecting Choices From a List 2 18 CTS850 SDH PDH Test Set User Manual Functional Overview Changing Decimal Numbers Some parameters allow you to set a numeric value for them For these parameters preset choices are always provided to save you time However if the preset choices are not appropriate for your needs you can set specific values by selecting the U
117. re On line help Connecting signals Parameter selection and editing Disk drive operation This section also details conceptual information important to the use of the CTS 850 in particular Difference between Synchronous Plesiochronous and Asynchronous PDH Hierarchy Definitions Anomaly Defect Failure and Alarm SDH Multiplexing Principles Difference between Add Drop Map Demap and Multplex Demultiplex 45 Mb s Map Demap Implementation CTS850 SDH PDH Test Set User Manual 2 1 Functional Overview Front Panel Controls Indicators and Connectors Figures 2 1 and 2 2 identify the controls indicators and connectors located on the front panel of the CTS850 SDH PDH Test Set These buttons assign the displayed choice to the selected parameter or execute the selected action Tektronix CTS850 SDH Testet F These buttons select the pages of the current menu Figure 2 1 Controls Located Around the Display 2 2 CTS850 SDH PDH Test Set User Manual Functional Overview Each of these buttons performs Disk drive a specific function Theknobis ofr orem omm 2 Mb s Balanced primarily used Connectors to highlight gt Eu Seer optional parameters C within pages STATUS E pis op qom Status Lights TEST S 2 34 140 Mb s These buttons Fu kd Ed 2 Mb s 8 Mb s selectoneo
118. rements Stopped TEST SETUPS Test Duration oo History Resolution Normal 1 min samples At 1 minute resolution the maximum history length is 3 days Upon reaching the 3 day limit new data will begin overwriting the old data CONTROL Figure 2 7 The Five Menus CTS850 SDH PDH Test Set User Manual Tek Measurements Stopped SIM 1E e STM TE UTILITY CHOICES SIMTE STM 1E SIM 1E STM 1E USER DEFINED Functional Overview What is a Menu A menu groups related functions together For example all settings that affect the signal transmitted by the CTS850 are located in the TRANSMIT menu Each menu is made up of pages A page is identified by a page tab located at the bottom of the display see Figure 2 8 If the choice is not available it is not displayed or it is not high lighted The CTS850 always displays a menu The name of the current menu is shown near the top of the display To change to another menu press a menu button on the front panel 2 10 CTS850 SDH PDH Test Set User Manual Functional Overview TEST SETUPS Test Recall Control Instrument Pass Fail Instrument Pass Fail Settings TRANSMIT Transmit 64k Tx Defects amp Pointers amp J itter amp APS More Settings Settings Anomalies Timing Wander Commands 1 of 2 Transmit Section Path Trace Signal Overhead More Settings Overhead Overhead Settings Labels PRBS Test 2 of 2 RECEIVE R
119. ressed digital video signals transmitted over a network can be impaired by low frequency jitter or frequency drift that may be acceptable in other applications One source of this jitter is pointer movement used to synchronize SDH payloads across a network You can use the CTS850 to analyze jitter in a PDH signal due to pointer movement in the SDH signal Two new measurements Frequency Drift Rate and Pointer Hit Seconds help show this effect The CTS850 generates a SDH signal containing a sequence of pointer movements The CTS850 analyzes the timing of the dropped 34 Mb s signal 1 Connect the CTS850 to the network element as shown in Figure 3 11 CTS 850 SDH PDH Test Set 34 Mb s 34 Mb s Add Drop Mux Figure 3 11 Setup to Check Video Timing Quality CTS850 SDH PDH Test Set User Manual 3 31 Basic Test Procedures 2 Set up the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT TRANSMIT Transmit Rate STM 1E SETTINGS Structure TU3 Async TRANSMIT JITTER amp J itter ER Line WANDER TRANSMIT POINTERS amp Pointer Timing Pointer TIMING Mode Sequences PoinerType AU Pointer a Type Periodic 87 3 RECEIVE RECEIVE EM Rate 34 Mb s SETTINGS RESULTS SDHRESULTS RESULTS none J itter 3 Press the POINTER ACTION button to start the poin
120. rformance monitoring 3 19 pin assignments Overhead Add Drop Port G 4 RS 232 G 3 VGA video output G 1 Plesiochronous 2 27 POINTER ACTION button 3 195 Pointer ss Bit mismatch 3 133 POINTERS setting 3 195 single pointer movements 3 195 burst pointer movements 3 195 continuous pointer movement 3 195 changing timing alternative to pointer movements 3 203 pointer sequences generating 3 206 pointer sequences with tributary offset 3 216 Pointers MAIN RESULTS 3 238 power requirements 1 13 PRBS insert in overhead bytes 3 105 Print 3 265 PRINT CONTROL dialog box 3 265 PRINT button 3 265 Print Main Results PRINT CONTROL dialog box 3 265 printer setup 3 265 Printer Type PRINTER SETUP 3 265 printers RS 232 parameters 3 265 supported 3 265 printing results 3 265 Index 5 Index R Rear panel connectors 2 4 G 1 Calibration Signal Output G 4 External Clock Input 2 Mb s or 2 MHz G 7 GPIB Port G 3 Handset Interface G 8 Jitter Inputs amp Outputs G 9 Overhead Add Drop Port G 4 RS 232 Port G3 VGA Video Output G 2 RECEIVE button 2 11 RECEIVE SETTINGS SDH 3 119 PDH 3 147 results displaying 3 229 RESULTS button 2 11 Results viewing 3 229 Jitter amp Wander 3 239 Error Analysis 3 240 Performance Analysis 3 242 Round Trip Delay Offset Signal Status R X 3 130 RS 232 connector G 3 RS 232 parameters 3 268 S S1 byte editing 3 92 SDH output s
121. rs for the test m Mask type for jitter analysis W Start frequency m End frequency m Number of frequency samples The results are displayed in numerical and graphical form 1 Connect the CTS850 to the network element as shown in Figure 3 10 3 28 CTS850 SDH PDH Test Set User Manual Basic Test Procedures 2 MHz G 703 clock from J CLK OUT CTS 850 SDH P DH Test Set Clock input All Signals are STM 1E Figure 3 10 Setup to Check Clock to Line Jitter Transfer CTS850 SDH PDH Test Set User Manual 3 29 Basic Test Procedures 2 Set up the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TRANSMIT JITTER amp J itter Output MHz G 703 WANDER RECEIVE JITTER amp J itter Input Line WANDER Source TEST SETUPS JITTER TESTS Test Type J itter Transfer Test Control Edit Setup Mask Type as appropriate Start Frequency as appropriate End Frequency as appropriate Number Freq as appropriate Samples 3 Press the START STOP button on the CTS850 so that the START STOP light is on As the test is running the jitter transfer graph is displayed on the screen The test stops automatically after it has completed 3 30 CTS850 SDH PDH Test Set User Manual Basic Test Procedures Video Timing Quality Testing Comp
122. ry of Path B3 Errored Seconds change the CTS850 setup as follows Select Menu Highlight Page Parameter HISTORY none GRAPHS turn the knob to Path B3 Errored select the desired Secs graph Press Menu Button RESULTS Select Choice Change Bottom Select Graph 8 Turning the knob moves the cursor from one bar to the next The specific measurement values at the cursor location are shown in the display 9 Once the graph fills the width of the display you can pan through the entire test using the knob 10 You can compress or expand the time scale with the Zoom Out or Zoom In action buttons Press the button next to Zoom Out to change the time scale to 5 minutes per bar CTS850 SDH PDH Test Set User Manual Basic Test Procedures Jitter Wander Testing With the CTS850 jitter generation and analysis capability it is easy to run the following automated ITU jitter conformance tests m Jitter Tolerance m Jitter Transfer Output Jitter Jitter Generation W Pointer Jitter This section shows examples of the jitter tolerance jitter transfer and video timing quality tests Testing Jitter Tolerance The CTS850 generates a signal that contains jitter at various frequencies and feeds it to the network element Simultaneously the CTS850 receives the output from the network element and analyzes its performance You can specify several parameters for the test m Mask type for jitter analysis
123. s C 1 Appendix D Specifications eeeeee D 1 Appendix E Incoming Inspection Test E 1 Appendix F Example Disk Contents F 1 Appendix G Rear Panel Connectors G 1 VGA Video Output 21554 253 cox epo VU Re S we ees RCU EUR G 2 GPIB PODU 4D wet edd des exse qais ot ardiente v cae olia G 3 155 232 POPE Lad ent vane tertio obtu Um doa S Powter ants G 3 Calibration Signal Output 325 264 cease oes ee RO RR G 4 Overhead Add Drop Port 2 4 veers Re woe P Rn tee G 4 External Clock Input 2 Mb s or 2 MHZ G 7 Eandset Inter ACS teas qe tado STR AQ eae o OC AAG G 8 Jitter Inputs and Outputs 4 65 ane ed eb OE OTi dre G 9 BEES OUT morare eol cig OO e VA ee ae tae wis G 9 JCDE IN oe onal ta eth laren tod pe hse dort teer terc bes G 9 JCLR OUP s Peng Sep nth d n picco bat a f rate G 9 ANALOG OUT eso eh Beh Pa ee RURERE RS ES G 10 Appendix H Changing Optical Port Connectors H 1 Appendix I Packing for Shipment I 1 Appendix J Telecommunications Technology J 1 Basic SDH Signal 4 uu cua Reuse Seb Rea CR J 1 PDE Basis 225 ERECTA UU RE SA SER HEN J 2 Asynchronous Multiplexing lees J 6 PDH Multiplexing 4 vert ete cde prem num Xp J 9 G 826 M 2101 1 M 2100 and G 821 Analysis J 10 Jitter amp Wander Tutorial uec ru E E ERIS ERO E J 16 Principles amp Metrics of Jitter amp Wander
124. s TU Background Fill Payload Structure ow Test Pattern essees TU12 Floating Async TUG3 1 IUGZ 1 IU12 Idle 0xD5 2 Mb s PRBS 2 23 1 PCM30 CAS C Normal TX RX Setup esse Coupled B 64k Tx DEFECTS amp POINTERS JITTER amp ANOMALIES amp TIMING WANDER Pressing one ofthese buttons selects the page identified above the button Pages a the Menu Figure 2 5 Major Areas of the Display 2 6 Usually these items are the values thatcan be assigned to the selected parameter CTS850 SDH PDH Test Set User Manual Functional Overview Figure 2 6 provides a guide to specific areas of the display Highlighted parameters can be Choices or actions changed dimmed parameters available for the cannot be changed under the selected parameter current setup Received Test Signal Transmitted Menu TestState Progress Name Indicator Indicator Highlighted Status Signal Status Parameter Indicator Indicator Tek Measurements Stopped pem STM 1E TRANSMIT CHOICES Transmit Rate s Transmit Clock Internal SIM 4 C Transmit Level f Parameters SDH Structure seses f TU12 Floating Asyn4 STM 1 LJ or options TU Under Test J TUG3 41 TUG2 1 Tuz controlled TU Background Fill Idle OxD5 C from this Payload Structure A 2 Mb
125. s example the Transmitter is generating a 2 Mb s test signal which is mapped into a STM 1 signal by the Add Drop Mux The Receiver monitors the STM 1 signal received from the Add Drop Mux demaps the 2 Mb s test signal and verifies the test pattern received 1 Connect the CTS850 to an Add Drop Multiplexer ADM as shown in Figure 3 3 3 6 CTS850 SDH PDH Test Set User Manual Basic Test Procedures CTS 850 SDH PDH Test Set 2 Mb s or any 000 PDH rate 2 Mb s or any PDH rate Add Drop Mux Figure 3 3 Setup to Test Mapping and Demapping CTS850 SDH PDH Test Set User Manual 3 7 Basic Test Procedures 2 Set up the CTS850 as follows Press Menu Select Menu Highlight Button Page Parameter Select Choice TEST SETUPS RECALL DEFAULT Recall Setup INSTRUMENT FACTORY SETUPS SETTINGS TRANSMIT TRANSMIT Transmit R ate 2 Mb s or any SETTINGS PDH rate RECEIVE RECEIVE Receive Rate STM 1 SETTINGS Structure TU 12 Async or applicable TU x TU Under Test Set to match how the NE is provisioned Payload 2 Mb s Unframed or any PDH rate TEST SETUPS TEST CONTROL Test Duration 15 Minutes RESULTS SDH RESULTS Defects 3 Press the START STOP button While the test is running the CTS850 counts errors and errored seconds and then calculates the error ratio for each error type After 15 minut
126. s product in wet or damp conditions Do Not Operate in Explosive Atmosphere To avoid injury or fire hazard do not operate this product in an explosive atmosphere Wear Eye Protection To avoid eye injury wear eye protection if there is a possibility of exposure to high intensity rays Product Damage Precautions xxvi Use Proper Power Source Do not operate this product from a power source that applies more than the voltage specified Provide Proper Ventilation To prevent product overheating provide proper ventilation Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel CTS 850 SDH PDH Test Set User Manual General Safety Summary Safety Terms and Symbols gt D T Terms in This Manual These terms may appear in this manual WARNING Warning statements identify conditions or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the pro
127. sts you do not need to set the controls described below Periodic calibration of the jitter generation system is recommended to maintain best accuracy You can execute a built in calibration routine before making critical measurements Refer to the Jitter Calibration information located at the end of this section CTS850 SDH PDH Test Set User Manual 3 175 Setting Jitter Wander Parameters 3 176 Selecting the Jitter Mode To select the jitter measurement mode Select Menu Highlight Page Parameter JITTER amp J itter Mode WANDER Press Menu Button RECEIVE Select Choice Peak Peak m Select Peak Peak to make peak to peak jitter measurements m Select RMS to make RMS jitter measurements If you select RMS the only available input filter is a 12 kHz high pass filter Selecting the Input Source To select the input source on which you want to measure jitter Select Menu Highlight Page Parameter JITTER amp J itter Input WANDER Source Press Menu Button RECEIVE Select Choice m Select Line to measure jitter in the received line front panel SDH or PDH signal selected in the RECEIVE SETTINGS page m Select Clock to measure jitter on the rear panel external jitter clock input J CLK IN If you select Clock you must set the external jitter clock input rate that rate does not have to be the same as the Receive Rate selected in the RECEIVE SETTINGS page CTS850 SDH PDH Test
128. t Configuration Page 3 261 Table C 1 Default Factory Settings C 1 Table D 1 General CTS 850 Specifications D 1 Table D 2 2 Mb s 34 Mb s 140 Mb s TUI TUS Capabilities sc ois oes rr REIR D 13 Table D 3 Jitter and Wander D 24 Table D 4 Environmental Specifications D 32 Table D 5 Physical Characteristics D 34 Table D 6 Certifications and compliances D 36 Table E 1 Required Equipment E 2 Table G 1 VGA Video Output Connector Pin Assignment 4 4 00s se ph ERE Rh ae ao es G 2 Table G 2 RS 232 Rear Panel Connector Pin Assignment 94h ava d ek Vows ee Pe A ee alos G 2 Table G 3 Overhead Channels Added G 5 Table G 4 Overhead Channels Dropped G 5 Table G 5 Overhead Add Drop Port Data Signal Pin Assignments iose enar har Rr mh nan G 6 Table G 6 Overhead Add Drop Port Additional Pin Assignments 2 4 do s er e te he e e E ES G 6 Table G 7 Overhead Add Drop Additional Pin Assignments dixe ervERER ES CODI ANA SETS G 7 Table G 8 Handset Interace Specifications G 8 xxii CTS 850 SDH PDH Test Set User Manual Table of Contents Table J 1 Non Synchronous Hierarchy J 1 Table J 2 Synchronous Hierarchy CTS 850 SDH PDH Test Set User Manual xxiii Table of Contents Xxiv CTS 850 SDH PDH Test Set User Manual a 7 5 EN Gene
129. t panel is pressed You can set the threshold to any value between 0 and 200 UI depending on the Range Setting Whenever the received jitter exceeds the range of the jitter measurement system the Current Jitter reads Unlocked Jitter Unlocked Seconds is a count of how many seconds the measurement system has been unlocked since the beginning of the the measure ment CTS850 SDH PDH Test Set User Manual 3 179 Setting Jitter Wander Parameters To set the jitter hit threshold Press Menu Select Menu Highlight Button Page Parameter Select Choice RECEIVE JITTER amp J itter Hit as appropriate WANDER Threshold m Select USER DEFINED to specify a jitter hit threshold different from the predefined choices Setting the Pointer Hit Threshold The pointer event threshold available for PDH rates determines the sensitivity of the Jitter Pointer Hits measurement which is based on the frequency drift rate To set the pointer event threshold Press Menu Select Menu Highlight Button Page Parameter Select Choice RECEIVE JITTER amp Pointer Hit as appropriate WANDER Threshold m Select USER DEFINED to specify a pointer hit threshold different from the predefined choices You can set the threshold to any value between 0 and 10 ppm sec 3 180 CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters Example of Jitter Measurements The RESULTS screen for Jitter Timing Quality follows Tek Measurements Sto
130. te for 140 Mbit s and STM 1E line mode rear panel signal is twice the line rate m Select Clock 0 8 V to enable generated jitter on the rear panel jitter clock output J CLK OUT only AC coupled ECL The transmitted line remains jitter free m Select 2 MHz G 703 to enable generated jitter on the rear panel jitter clock output J CLK OUT that meets the interface requirements for synchronization signals as specified in G 703 The transmitted SDH or PDH line signal remains jitter free You can independently set the Jitter Clock Output rate and frequency offset regardless of the line rate and frequency offset of the transmitted signal To set an independent rate for the Jitter Clock Output Press Menu Button TRANSMIT Select Choice Clock 0 8V Select Menu Highlight Page Parameter JITTER amp J itter Output WANDER J itter Jitter Clock Rate Rate as appropriate CTS850 SDH PDH Test Set User Manual Setting Jitter Wander Parameters To set an independent frequency offset for the Jitter Clock Output Select Menu Highlight Page Parameter JITTER amp Jitter Output WANDER J itter J iter Clock Offset Offset Press Menu Button TRANSMIT Select Choice Clock 0 8V as appropriate Setting the Jitter Frequency and Amplitude The generated jitter is a sinusoidal modulation of the nominal line or clock rate Refer to the Modulation Range specifications for details
131. ter sequence 4 Press the START STOP button on the CTS850 so that the START STOP light is on As the test is running results are displayed on the screen The test stops automatically after it has completed 3 32 CTS850 SDH PDH Test Set User Manual SS ASPEN Navigation CTS 850 paper based manual amp CD ROM There is a deliberate gap between Basic Testing which ends on page 3 32 and the next section Jitter amp Wander which begins on page 3 155 In order to get you going as fast as possible with the CTS850 SDH PDH Test Set the paper based user manual focuses solely on Getting Started information User information in as complete detail as required is contained on the Reference CD ROM The following table shows you where to quickly find the section that answers your particular test amp measurement questions Everything else appears in the reference manual on CD ROM including all information contained in the paper based user manual Where to Find Information in this User Manual Look in this part of the If you want to know how to manual Use the basic functions of the test set including Functional Overview Controls indicators connectors Elements of Chapter 2 front panel display Menu structure Online help Connecting signals Selection and editing of choices Disk drive operation Tutorial Setup and use the test set for network and equipment test applications including Network continuity c
132. tiplexed into TU groups TUGs As the figure illustrates the xN label indicates the multiplexing integer used to multiplex the TUs to the TUGs The next step is the multiplexing of the TUGs to higher level VCs and TUG 2 and TUG 3 are multiplexed into VC 3 ANSI mappings and VC 4 These VCs are multiplexed with fixed byte stuffing to form administration units AUs which are finally multiplexed into the AU group AUG This payload then is multiplexed into the Synchronous Transport Module STM CTS850 SDH PDH Test Set User Manual Functional Overview Figure 2 21 SDH Multiplexing Hierarchy Table 2 3 SDH Multiplexing Structure Term Contents Description C n payload at lowest multiplexing level VC n single C n plus VC POH VC n Pe ae or TU 3s plus POH for the specific level TU n VC plus tributary unit pointer TUG 2 various TU n s TUG 3 TU 3 7 TUG 2s TU 3 7 TUG 2s AU n VCs plus AU pointer STM n n 1 3 AUGS n synchronously multiplexed STM 1 Signals POH Path Overhead C Container TU Tributary Unit AU Administrative Unit VC Virtual Container TUG Tributary Unit Group STM Synchronous Transport Module Difference in Telecommunications Terms Three sets of terms are listed here because it is important to see that they are not equivalent terms which is how they get used in normal discussions They are Add Drop The process where a part of the information carried in a transmission system is extract
133. uences with Tributary Offset 3 216 Testing Automatic Protection Switching 3 217 Setting the APS Mode ona Rt ya edam etx E S CHE 3 217 set ngthe KT Bylecs duds d EROR VI VADE ROS IRAE E ER 3 218 Seting he K2 Byte cedoeaces a Rete iuetemb Y ems bes 3 222 Transmitting the K1 and K2 Bytes lusus 3 227 X CTS 850 SDH PDH Test Set User Manual Table of Contents Viewing the Network Response to APS Commands 3 228 Viewing Results ox eins x Y Me OX 3 229 G 826 M 2101 1 M 2100 and G 821 Analysis 3 229 Viewing a Summary of Results 008 3 230 Viewing Detailed Results 4 5 52 4085 00 38 lt aid SE RC C 3 231 Displaying an Analysis of Test Results 3 237 Viewing Measurement Histories 004 3 243 LY pes OP Graphs s pone Sere o RO RIPE a 3 243 Elements of the History Graph Display 3 248 Graph Name 2 esq x uoles mbi ul Koh Coe dep VC SCENE MR 3 248 History Resolutio 23e vews ee pot pe teet eweren 3 248 Power Out Indicator ns 44 5 5 04 due dre ehe eec 3 248 Measurement Results at Cursor Position 3 249 Zooming History Graphs 0 cee eee eee eee 3 250 Panning History Graphs x v cains we ae eoeee Soe ee eee 3 251 Changing the Displayed History Graph 3 252 Displaying Mini Graphs 20 eee 3 252 Saving and Recalling Results 0 0
134. ware for TDEV MTIE Unique timing quality measurement Pointer generation including sequences and analysis Alarm generation and analysis CTS850 SDH PDH Test Set User Manual 1 1 Getting Started TU error monitoring and analysis Performance monitoring per G 821 G 826 M 2100 and M 2101 1 on all layers simultaneously Automatic Protection Switching APS testing DCC and user channel access Programmable via IEEE 488 2 and RS 232 The CTS850 meets the needs of the craftsperson and the network engineer The CTS850 meets the requirements of those working in network installation and maintenance by providing the capability to perform Network integrity testing In service performance monitoring Stimulus and response testing Stress testing Overhead testing Automated jitter conformance testing G 821 G 826 M 2100 and M 2101 1 performance measurement Accessories Some accessories are included with the CTS850 SDH PDH Test Set If you wish to purchase optional accessories or additional standard accessories see a Tektronix products catalog or contact your local Tektronix field representative Standard Accessories CTS850 SDH PDH Test Set User Manual Tektronix part number 070 9988 XX CTS850 SDH PDH Test Set Reference Manual on CD ROM Tektronix part number 063 3013 XX CTS850 SDH PDH Test Set User Manual Getting Started m CTS 850 SDH PDH Test Set Programmer Manual Tektronix part number 070 9990 X X m Instrum
135. xternal add will be handled as a framing option in the same manner as the other PDH rates are handled RX signal level for 45 Mbit s are Normal and Monitor Defect insertion for 45 Mbit s is Pattern Bit Framed Bit framed only Frame Bit Burst C bit parity C bit framing only P bit parity M13 framing only and Code violations 45 Mbit s only Anomaly insertion for 45 Mbit s is RDI frame signals only AIS framed only and Idle framed only Failure insertion for 45 Mbit s is LOS only when 45 Mbit s is the TX line rate 2 34 CTS850 SDH PDH Test Set User Manual i 4 Tutorial The tutorial acquaints you with the features of the CTS850 by having you run a test while you explore specific features of the CTS850 SDH PDH Test Set For full details on how to use the CTS850 refer to Chapter 3 Reference The tutorial presents procedures in tables Perform the procedure by reading from left to right in the table see example below The word none in a cell indicates that no action is required Select Menu Highlight Page Parameter Press Menu Button Select Choice Begin with Step 1 Step 6 Step 8 CTS850 instruction is complete Some procedures require several iterations of highlighting parame ters and selecting choices Some procedures may require more than one menu button or menu page selection as well Note Use the buttons below the display to Select Menu Page Use the rotary knob to H

Setting Jitter/Wander Parameters - NSCA TRA-CAL

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