HP 37718A Manual de usuario Pagina 97
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87
Making Measurements
Measuring Wander
Measuring Wander
Description: Accurate Wander measurements require a Wander reference derived
from the SONET Clock module. Wander results are displayed in UI and
nanoseconds and Jitter Amplitude and Jitter Hits results are available.
When wander is measured at 2 Mb/s, Estimated Bit and Frame slips are
calculated and a Bar Graph shows the cumulative Wander over the
measurement period.
HOW TO: Make the Measurement
1 To obtain the Wander reference from the DSn transmitter connect
REF OUT on the SONET Clock module to REF IN on the DSn Jitter
TX module. Choose SIGNAL on the
display, choose CLOCK SYNC and
choose the SOURCE required from the menu. See “Setting DSn
Transmit Interface” page 2.
2 To obtain the Wander reference from the SONET transmitter choose
the required reference from the CLOCK menu on the
display. See, “Setting SONET Transmit Interface” page 4.
3 If measuring wander at a DSn rate set up the DSn receive interface.
See, “Setting DSn Receive Interface” page 15.
2 Mb/s
TRANSMIT
PDH/DSn
MAIN SETTINGS
WANDER REF IN
TRANSMIT
SONET
MAIN SETTINGS
- HP 37718A 1
- OmniBER 718 1
- About This Book 4
- 3 Making Measurements 6
- Contents 10
- 1 Setting the Interfaces 11
- Setting the Interfaces 12
- STRUCTURED 13
- SETTINGS CONTROL COUPLED 14
- INTERNAL THRU MODE THRU MODE 14
- EXTERNAL 14
- AUTO TOLERANCE 17
- TRANSFER FUNCTION 17
- Setting SONET THRU Mode 21
- TRANSMIT 22
- SONET TEST FUNCTION SONET 22
- Using Smart Test 23
- Setting DSn Receive Interface 25
- Interface 29
- 2 Selecting Test Features 31
- Selecting Test Features 32
- STS-1# 2 STS-1#3 34
- STS-1# 1,2,3 34
- DECREASE DIGIT 34
- INCREASE DIGIT 34
- Generating Overhead Sequences 37
- , and to set the 43
- Setting up Signaling Bits 44
- INSERT 2 Mb/s 47
- INSERT DS1 47
- DROP 2 Mb/s 49
- DROP DS1 49
- STORED SETTINGS COUPLED 49
- DESELECT ALL DESELECT SELECT 50
- Ω IN port of the PDH/DSn 53
- DROP 34 Mb/s 56
- DROP DS3 56
- DSn Payload 60
- Using FEAC Codes 61
- Setting DSn Spare Bits 63
- Adding Pointer Adjustments 64
- START INIT 65
- STOP INIT 65
- SONET RESULTS 71
- Circuits 73
- Switch Messages 74
- Inserting & Dropping Data 75
- Communications Channel 75
- Test Timing 79
- ANALYSIS 80
- Measuring Frequency 82
- Measuring Optical Power 83
- Measuring Round Trip Delay 84
- DSn PAYLOAD 85
- Monitoring Signaling Bits 86
- TEST FUNCTION 87
- SERVICE DISRUPT 88
- SRVC DISRUPT 89
- MAIN SETTINGS 90
- SONET ALM SCAN 92
- Performing a DSn Alarm Scan 93
- Measuring Jitter 94
- Measuring Extended Jitter 96
- Measuring Wander 97
- Measuring Jitter Tolerance 99
- Measuring Jitter Transfer 102
- TERMINATE 103
- FLOPPY DISK 108
- RUN/STOP 108
- Viewing the Bar Graph Display 111
- ZOOM IN ZOOM OUT 112
- Summaries 113
- Logging Graph Displays 115
- Logging Results 117
- Logging on Demand 120
- Logging Results to Parallel 126
- (Centronics) Printer 126
- CONTROL 127
- NORMAL COMPRESS 129
- Printing Results from Disk 130
- Connecting an HP 850C DeskJet 131
- Printer to a Parallel Port 131
- INSERT PAPER 133
- Storing, Logging and Printing 134
- PAPER FEED 135
- JUMP NEXT CHAR 139
- PREVIOUS CHAR 139
- Recalling Configurations from 140
- Instrument Store 140
- Formatting a Disk 141
- Labeling a Disk 142
- Creating a Directory on Disk 143
- - .CNF filter, - .SMG filter 144
- Renaming a File on Disk 146
- Deleting a File on Disk 147
- Deleting a Directory on Disk 148
- FILE PROPERTIES 149
- FILE DESCRIPTOR 149
- PREVIOUS CHAR NEXT CHAR 149
- GRAPHICS 151
- Saving Data Logging to Disk 152
- Saving Configurations to Disk 153
- RECALL CONFIGURATION 154
- RECALL GRAPHICS 155
- Copying Configuration from 156
- Instrument Store to Disk 156
- , highlight the 158
- Copying Graphics Results from 160
- SETTINGS CONTROL 164
- Setting Time & Date 165
- Enabling Keyboard Lock 166
- MISCELLANEOUS 167
- GRAPH RESULTS 169
- COLOR CONTROL 169
- Dumping Display to Disk 171
- SCREEN DUMP 172
- PRINT NOW 172
- Running Self Test 173
- CONF. TESTS 174
- SELF TEST 174
- Appendix A 177
- 7 STS-1 SPE Background 177
- Patterns 177
- Appendix B 179
- 8 ETSI/ANSI Terminology 179
- ETSI/ANSI Terminology 181
- Asia Pacific: 187
- Australia/New Zealand: 187
- Latin America: 188
- United States: 188
- About This Edition 189
- Printed in U.K. 12/98 190
- 37718-90022 190
- In This Book 190
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