HP OMNIBER 718 37718A User Manual

Dsn/sonet operation.
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HP 37718A
OmniBER 718
User's Guide
DSn/SONET
Operation

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   Summary of Contents for HP OMNIBER 718 HP 37718A

  • Page 1

    HP 37718A OmniBER 718 User’s Guide DSn/SONET Operation...

  • Page 2

    HP Part No. fitness for a particular 37718-90022 purpose. First edition, 09/98 Hewlett-Packard shall not be liable for errors Second Edition, 12/98...

  • Page 3

    User’s Guide DSn/SONET Operation HP 37718A OmniBER 718...

  • Page 4

    About This Book This book tells you how to select the features that you want to use for your test. The selections available are presented in the following groups: • Transmit and receive interfaces • Test features, for example, the addition of errors and alarms to the test signal •...

  • Page 5: Table Of Contents

    Contents 1 Setting the Interfaces Setting DSn Transmit Interface 2 Setting SONET Transmit Interface 4 Setting Jitter Transmit Interface 7 Setting Wander Transmit Interface 9 Setting SONET THRU Mode 11 Using Smart Test 13 Setting DSn Receive Interface 15 Setting SONET Receive Interface 17 Setting Jitter Receive Interface 18 Setting Extended Jitter Receive Interface 19 Setting Wander Receive Interface 20...

  • Page 6: Table Of Contents

    Contents Inserting an External DSn Payload/Test Signal 43 Dropping an External Payload/Test Signal 46 Adding Errors & Alarms at the SONET Interface 49 Adding Errors & Alarms to the DSn Interface/DSn Payload 50 Using FEAC Codes 51 Setting DSn Spare Bits 53 Adding Pointer Adjustments 54 Using Pointer Graph Test Function 61 Stressing Optical Clock Recovery Circuits 63...

  • Page 7: Table Of Contents

    Logging Results to Internal Printer 118 Logging Results to RS-232-C Printer 119 Printing Results from Disk 120 Connecting an HP 850C DeskJet Printer to a Parallel Port 121 Changing Internal Printer Paper 122 Cleaning Internal Printer Print Head 125 5 Using Instrument and Disk Storage Storing Configurations in Instrument Store 128...

  • Page 8: Table Of Contents

    Contents Labeling a Disk 132 Managing Files and Directories on Disk 133 Saving Graphics Results to Disk 140 Saving Data Logging to Disk 142 Saving Configurations to Disk 143 Recalling Configuration from Disk 144 Recalling Graphics Results from Disk 145 Copying Configuration from Instrument Store to Disk 146 Copying Configuration from Disk to Instrument Store 148 Copying Graphics Results from Instrument Store to Disk 150...

  • Page 9: Table Of Contents

    Contents 7 STS-1 SPE Background Patterns 8 ETSI/ANSI Terminology ETSI/ANSI Conversion and Equivalent Terms 170...

  • Page 10

    Contents...

  • Page 11

    Setting the Interfaces This chapter tells you how to set the instrument interfaces to match the network being tested.

  • Page 12: Setting Dsn Transmit Interface

    Setting the Interfaces Setting DSn Transmit Interface Description DSn transmit interface settings should match network equipment settings of Rate, Termination and Line Code and determine the Payload to be tested. TIP: To set the Transmitter and Receiver to the same interface settings choose OTHER HOW TO:...

  • Page 13

    Setting the Interfaces Setting DSn Transmit Interface 3 If DS1 or DS3 is chosen, choose the required OUTPUT LEVEL. 4 If you have chosen 2 Mb/s as the SIGNAL rate, choose the required TERMINATION. (At all other signal rates the impedance is fixed). 5 If you have chosen 2 Mb/s or DS1 as the SIGNAL rate, choose the required LINE CODE.

  • Page 14: Setting Sonet Transmit Interface

    TIP: If you wish to set the HP 37718A transmitter and receiver to the same interface settings choose HOW TO: 1 Make your choice of SIGNAL rate.

  • Page 15

    Setting the Interfaces Setting SONET Transmit Interface 4 Choose FOREGROUND MAPPING and type of payload. B/G MAPPING Mapping may be selected from a pictorial display by moving the cursor to MAPPING and pressing to move between STS Layer choice, VT Layer choice and Payload Layer choice.

  • Page 16

    Setting the Interfaces Setting SONET Transmit Interface If you have chosen 2 Mb/s, DS1 or DS3 under Mapping, the Framed choice is expanded to provide a menu of framing types. 9 Choose the PATTERN type and PRBS polarity. 10 Choose the mapping required in the background (non-test) STS’s. 11 If VT mapping is chosen for the test STS, choose the PATTERN IN OTHER VT’s.

  • Page 17: Setting Jitter Transmit Interface

    Setting the Interfaces Setting Jitter Transmit Interface Setting Jitter Transmit Interface Description: You can add jitter to the transmitted DSn or SONET signal at 2 Mb/s, 34 Mb/s, STS-3, OC-3, OC-12, and OC-48. You can source the jitter modulation internally or from an external source. HOW TO: 1 If you are adding jitter to the DSn signal, set up the DSn transmit interface.

  • Page 18

    EXTERNAL EXTERNAL is chosen. , the HP 37718A will "sweep" through the ITU-T SWEPT , you can choose the "spot" jitter frequency. The SPOT . You can then control the "spot" jitter...

  • Page 19: Setting Wander Transmit Interface

    Setting the Interfaces Setting Wander Transmit Interface Setting Wander Transmit Interface Description: You can add Wander to the 2 Mb/s DSn signal and the STS-3, OC-3, OC-12 or OC-48 SONET signal. HOW TO: DSn Wander (2 Mb/s) 1 Connect REF OUT on the SONET Clock module to REF IN on the DSn Jitter TX module (this provides the Wander Reference).

  • Page 20

    Setting the Interfaces Setting Wander Transmit Interface 6 Choose the WANDER MASK setting required. You can choose the wander modulating frequency and wander amplitude if is chosen. If you choose , you can choose the "spot" wander frequency. The SPOT wander amplitude is adjusted and controlled according to your wander frequency choice.

  • Page 21: Setting Sonet Thru Mode

    Setting the Interfaces Setting SONET THRU Mode Setting SONET THRU Mode Description THRU mode is used to non-intrusively monitor SONET lines where no protected monitor points are available. As THRU mode locks some user settings, you must set SIGNAL RATE, STS rate, STS-1 SPE CHANNEL (if appropriate) before selecting THRU mode.

  • Page 22

    Setting the Interfaces Setting SONET THRU Mode 2 Make the PAYLOAD OVERWRITE choice required. If STS-3c SPE, STS-1 SPE, VT-6, VT-2 or VT-1.5 is chosen, the Section, Line and Path CVs are recalculated before transmission and the Mapping, Selected VT, VT Payload, Pattern, Tributary Offset and Pattern in other VT’s settings are displayed.

  • Page 23: Using Smart Test

    Smartsetup can help the user by attempting to identify the incoming signal structure and detect mixed payload signal structures. 1 Connect the HP 37718A to the network and choose if necessary the HOW TO USE SMARTSETUP:...

  • Page 24

    Setting the Interfaces Using Smart Test 4 In SONET mode the incoming signal will be identified on the top line of the display, and under this the payload mappings, the J1 Trace and C2 byte indicators are displayed on the bottom lines 5 Use the keys to display the J1 Trace information for each STS SPE.

  • Page 25: Setting Dsn Receive Interface

    Setting the Interfaces Setting DSn Receive Interface Setting DSn Receive Interface Description DSn Receive interface settings should match the network equipment settings of Rate, Termination and Line Code and determine the Payload to be tested. TIP: To set the transmitter and receiver to the same interface settings choose OTHER HOW TO: 1 Choose the required SIGNAL rate.

  • Page 26

    Setting the Interfaces Setting DSn Receive Interface 5 Choose the PAYLOAD TYPE. is required STRUCTURED is chosen, the DSn test signal must be set up. See STRUCTURED “Setting Transmit Structured Payload/Test Signal” page 37. If you chose 2 Mb/s, DS1 or DS3 as the PDH/DSn SIGNAL rate, the FRAMED choice is expanded to provide a menu of framing types.

  • Page 27: Setting Sonet Receive Interface

    SONET Receive interface settings should match the network equipment settings of Rate and Mapping, and determine the payload to be tested. TIP: If you wish to set the HP 37718A transmitter and receiver to the same interface settings, choose HOW TO: 1 Choose the required SIGNAL source.

  • Page 28: Setting Jitter Receive Interface

    Setting the Interfaces Setting Jitter Receive Interface Setting Jitter Receive Interface Description: Jitter and error measurements are made simultaneously when a jitter option is fitted. The measurements are made on the normal input to the DSn or SONET receiver and the interface selections are the normal Receiver selections.

  • Page 29: Setting Extended Jitter Receive Interface

    Setting the Interfaces Setting Extended Jitter Receive Interface Setting Extended Jitter Receive Interface Description: Extended Jitter measurements are made in a jitter bandwidth of 0.1 Hz to 25 kHz. These measurements are made at the upper end of the standard wander frequency range and the lower end of the standard jitter frequency range.

  • Page 30: Setting Wander Receive Interface

    Setting the Interfaces Setting Wander Receive Interface Setting Wander Receive Interface Description: You can measure Wander at all DSn and SONET rates. An external timing reference should be selected on the SONET HOW TO: 1 Choose an external timing reference on the MAIN SETTINGS page 4.

  • Page 31

    Selecting Test Features...

  • Page 32: Using Transmit Overhead Setup

    Selecting Test Features Using Transmit Overhead Setup Description You can set an overhead byte to a known static state to aid troubleshooting, for example to quickly check for "stuck bits" in path overhead bytes. Transport Overhead, Path Overhead, Trace Messages and Labels can be set using this feature.

  • Page 33

    Selecting Test Features Using Transmit Overhead Setup displayed. Many bytes in other overhead functions have not yet been defined. STS-1# 1,2,3 STS-3 section & line overhead selected are displayed (all 324 bytes of an OC-12 or 1,296 bytes of an OC-48 are displayed 81 bytes at a time by selecting each STS-3 in turn).

  • Page 34: Using Receive Overhead Monitor

    Selecting Test Features Using Receive Overhead Monitor Using Receive Overhead Monitor Description When first connecting to a SONET network, a start up confidence check can be made by viewing the behavior of all the overhead bytes. If the SONET network shows alarm indications, some diagnosis of the problem may be gained from viewing all the overhead bytes.The OVERHEAD MONITOR display is updated once per second (once per 8000 frames) approximately.

  • Page 35

    Selecting Test Features Using Receive Overhead Monitor If BYTE NAMES is chosen, the labels for the bytes are displayed. 4 If POH (Path Overhead) is chosen, choose the source of the overhead, SPE or VTSPE. J1 and J2 bytes can be monitored under Path Overhead or Trace Messages 5 If TRACE MESSAGES is chosen, you can monitor a data message to verify portions of the network.

  • Page 36: Setting Overhead Trace Messages

    Selecting Test Features Setting Overhead Trace Messages Setting Overhead Trace Messages Description You can insert a data message to verify portions of the network: J0 verifies the section overhead. J1 verifies the STS-1 SPE or STS-3c SPE path connection. J2 verifies the VT SPE path connection. 1 Choose the message for insertion in the chosen trace channel.

  • Page 37: Generating Overhead Sequences

    Selecting Test Features Generating Overhead Sequences Generating Overhead Sequences Description You may insert a pattern into a functional group of overhead bytes for testing or troubleshooting purposes. HOW TO: 1 Set up the SONET transmit interface and payload required. See “Setting SONET Transmit Interface”...

  • Page 38

    Selecting Test Features Generating Overhead Sequences 6 Start the sequence by choosing START N OTE When you start the sequence illustrated, one Out of Frame alarm and one Loss of Frame alarm should occur every eight seconds.

  • Page 39: Using Receive Overhead Capture

    Selecting Test Features Using Receive Overhead Capture Using Receive Overhead Capture Description Section, Line and Path overhead provide network support functions, responding dynamically to network conditions and needs. It is therefore useful to capture overhead activity on a frame by frame basis. TIP: The Overhead Capture display can be logged to the chosen logging device.

  • Page 40

    Selecting Test Features Using Receive Overhead Capture - captures activity after the first occurrence of a deviation from ON NOT your specified overhead state. Can be used for transient detection from a specified expected state. 4 Up to 16 records of overhead state are provided. Each record will represent between 1 and 64,000 frames.

  • Page 41: Adding Frequency Offset To Sonet Signal

    Selecting Test Features Adding Frequency Offset to SONET Signal Adding Frequency Offset to SONET Signal Description Frequency offset can be added to the SONET interface rate signal and to the payload signal. HOW TO: SONET Line Rate Offset 1 Choose the amount of frequency offset required. You can set the Frequency Offset in the range -999 ppm to +999 ppm in 1 ppm steps using The amount of applied Frequency Offset can be varied while...

  • Page 42

    Selecting Test Features Adding Frequency Offset to SONET Signal Tributary Offset 100 ppm 1 Choose the amount of tributary offset required. You can set the Offset in the range -100 ppm to +100 ppm in 1 ppm steps using DECREASE DIGIT The amount of applied Frequency Offset can be varied while measurements are taking place.

  • Page 43: Adding Frequency Offset To The Dsn Signal

    Selecting Test Features Adding Frequency Offset to the DSn Signal Adding Frequency Offset to the DSn Signal Description You can add frequency offset to the interface DSn SIGNAL at all rates. Frequency Offset can be added at preset ITU values or as User defined values in the range 100 ppm.

  • Page 44: Setting Up Signaling Bits

    Selecting Test Features Setting up Signaling Bits Setting up Signaling Bits Description When transmitting 2.048 Mb/s signals with timeslot-16 CAS (PCM30 or PCM30CRC) multiframing the state of A,B,C,D signaling bits can be set. The signaling bits of all timeslots are set to the user-defined 4 bit value. When transmitting a DS1 framed, structured signal the values of the A,B signaling bits for D4 and SLC-96 payloads, and A,B,C,D signaling bits for ESF payloads can be defined.

  • Page 45

    Selecting Test Features Setting up Signaling Bits SONET Operation Choose 2 Choose MAPPING PAYLOAD 3 If UNSTRUCTURED is chosen set the 2M CAS ABCD bits value on If STRUCTURED is chosen set the 2M CAS ABCD bits value on the STRUCTURED SETTINGS HOW TO Transmit a DS1 payload signal with user-defined signaling bits...

  • Page 46

    Selecting Test Features Setting up Signaling Bits 2 Choose SIGNAL on the MAIN SETTINGS 3 Choose TEST SIGNAL 56 kb/s display. SETTINGS 4 Set the A,B bits (for D4 and SLC-96) and A,B,C,D bits (for ESF) as required. SONET Operation 1 Choose on the TRANSMIT...

  • Page 47: Setting Transmit Structured Payload/test Signal

    DSn test signal to be tested and set any background (non test) conditions to prevent alarms while testing. TIP: If you wish to set the HP 37718A transmitter and receiver to the same Payload settings, choose HOW TO: 1 Choose the required TEST SIGNAL rate.

  • Page 48

    Selecting Test Features Setting Transmit Structured Payload/Test Signal 5 Choose the B/G PATTERN. The B/G PATTERN in the non test 56/64 kb/s timeslots is fixed as NUMBERED, that is, each timeslot contains a unique number to allow identification in case of routing problems. Signaling 6 If a 2 Mb/s PAYLOAD with PCM30 or PCM30CRC framing, or 56 kb/s or Nx56kb/s Test Signal is chosen.

  • Page 49: Setting Receive Structured Payload/test Signal

    Structured DSn Payload/Test Signal settings determine the SONET payload or the DSn test signal to be tested. TIP: If you wish to set the HP 37718A transmitter and receiver to the same Payload settings, choose HOW TO: 1 Choose the required Test Signal rate. If N x 64 kb/s or N x 56 kb/s is chosen, see "Setting Receive N x 64 kb/s/N x 56 kb/s Structured...

  • Page 50: Setting Transmit N X 64 Kb/s/n X 56 Kb/s Structured Payload/test Signal

    Selecting Test Features Setting Transmit N x 64 kb/s/N x 56 kb/s Structured Payload/Test Signal Setting Transmit N x 64 kb/s/N x 56 kb/s Structured Payload/Test Signal Description Wideband services such as high speed data links and LAN interconnection require a bandwidth greater than 56/64 kb/s but less than DS1/2 Mb/s for example 112 kb/s or 336 kb/s.

  • Page 51

    Selecting Test Features Setting Transmit N x 64 kb/s/N x 56 kb/s Structured Payload/Test Signal 6 The B/G PATTERN in the non-test 56/64 kb/s timeslots is fixed as NUMBERED, that is, each timeslot contains a unique identification number. Signaling 7 If a 2 Mb/s PAYLOAD with PCM30 or PCM30CRC framing, or 56 kb/s or Nx56kb/s Test Signal is chosen.

  • Page 52: Setting Receive N X 64 Kb/s/n X 56 Kb/s Structured Payload/test Signal

    Selecting Test Features Setting Receive N x 64 kb/s/N x 56 kb/s Structured Payload/Test Signal Setting Receive N x 64 kb/s/N x 56 kb/s Structured Payload/Test Signal Description Wideband services such as high speed data links and LAN interconnection require a bandwidth greater than 56/64 kb/s but less than DS1/2 Mb/s e.g.

  • Page 53: Inserting An External Dsn Payload/test Signal

    Selecting Test Features Inserting an External DSn Payload/Test Signal Inserting an External DSn Payload/Test Signal Description You can insert a DSn signal from external equipment into the SONET signal, or you can insert 2 Mb/s or DS1 into the structured DSn signal, as shown in the table below.

  • Page 54

    Selecting Test Features Inserting an External DSn Payload/Test Signal Insert 2 Mb/s or DS1 (Unstructured SONET Payload) 1 Connect the external payload to the MUX port of the PDH/DSn Transmit module. If 2 Mb/s connect to 75 2 Set up the required transmit SONET interface, and choose VT-2 or VT-1.5 MAPPING and VT PAYLOAD Insert 2 Mb/s or DS1 (Structured SONET Payload or Structured DSn)

  • Page 55

    Selecting Test Features Inserting an External DSn Payload/Test Signal Structured SONET Payload 2 Set up the required transmit SONET interface. See "Setting SONET Transmit Interface " page 4. 3 Set up the SONET structured payload. See "Setting Transmit Structured Payload/Test Signal " page 37. 4 Choose 2M PAYLOAD/DS1 PAYLOAD INSERT DS1 5 Choose the LINE CODE.

  • Page 56: Dropping An External Payload/test Signal

    Selecting Test Features Dropping an External Payload/Test Signal Dropping an External Payload/Test Signal Description You can drop a DSn signal from the received payload or drop 2 Mb/s or DS1 from the structured DSn signal to external equipment as shown in the table below.

  • Page 57

    Selecting Test Features Dropping an External Payload/Test Signal Drop 2 Mb/s /DS1 (Unstructured SONET Payload) Connect the DEMUX port of the DSn module to the external equipment. 2 Set up the required receive SONET interface, and choose VT-2 or VT-1.5 MAPPING and VT PAYLOAD 3 Choose the required LINE CODE.

  • Page 58

    Selecting Test Features Dropping an External Payload/Test Signal Structured SONET Payload 2 Set up the required receive SONET interface. See "Setting SONET Receive Interface " page 17. 3 Set up the SONET structured payload. See "Setting Receive Structured Payload/Test Signal " page 39. 4 Choose 2M PAYLOAD DROP 2 Mb/s 5 Choose the LINE CODE.

  • Page 59: Adding Errors & Alarms At The Sonet Interface

    Selecting Test Features Adding Errors & Alarms at the SONET Interface Adding Errors & Alarms at the SONET Interface Description Errors and alarms can be added to the SONET interface signal during testing. HOW TO: 1 Set up the SONET transmit interface and payload required. See "Setting SONET Transmit Interface "...

  • Page 60: Adding Errors & Alarms To The Dsn Interface/dsn Payload

    Selecting Test Features Adding Errors & Alarms to the DSn Interface/DSn Payload Adding Errors & Alarms to the DSn Interface/ DSn Payload Description Errors and alarms can be added to the DSn interface/payload signal during testing. HOW TO: 1 If SONET interface is chosen, set up the SONET transmit interface and payload required.

  • Page 61: Using Feac Codes

    Selecting Test Features Using FEAC Codes Using FEAC Codes Description The third C-Bit in subframe 1 is used as a FEAC channel, where alarm or status information from the far-end terminal can be sent back to the near-end terminal. The channel is also used to initiate DS3 and DS1 line loopbacks at the far-end terminal from the near-end terminal.

  • Page 62

    Selecting Test Features Using FEAC Codes 3 Choose the FEAC CODE TYPE. 4 Choose the MESSAGE from the choices displayed. If you chose a DS1 message an additional field to the right of the DS1 MESSAGE is displayed. Position the cursor on this field and choose If you choose from 1 to 28.

  • Page 63: Setting Dsn Spare Bits

    Selecting Test Features Setting DSn Spare Bits Setting DSn Spare Bits Description Certain Spare Bits will cause the occurrence of a minor alarm when received as a logical "0".: 8 Mb/s & 34 Mb/s - FAS Bit 12 2 Mb/s - NFAS Timeslot (timeslot 0 of NFAS frame) Bit 0 HOW TO: 1 If SONET interface is chosen, set up the SONET transmit interface and payload required.

  • Page 64: Adding Pointer Adjustments

    Selecting Test Features Adding Pointer Adjustments Adding Pointer Adjustments Description The transmitted SPE or VT pointer value can be adjusted for testing purposes. HOW TO: 1 Set up the SONET transmit interface and payload required. See "Setting SONET Transmit Interface " page 4. 2 Choose the POINTER TYPE.

  • Page 65

    T1.105/GR-253 Pointer Sequences Explained In addition to the BURST, NEW POINTER and OFFSET pointer movements described, the HP 37718A can also generate pointer sequences (pointer movements) according to T1.105.03 and GR-253. Before running a pointer sequence you can elect to run an initialization sequence, followed by a cool down period, and then run the chosen sequence.

  • Page 66

    (87+3 or 26+1) exceeds 60 seconds then the longer period is used for the initialization. For example, if T is set for 10 seconds then the initialization period may be extended to 900 seconds. The HP 37718A displays a message indicating which phase (initialization, cool down or measurement) the transmitter is currently generating.

  • Page 67

    Selecting Test Features Adding Pointer Adjustments N OT E The following conditions apply for pointer sequence generation: The sequences can only be applied to the SPE pointer when the SPE does not contain a VT structure, otherwise it is applied to the VT pointer. Pointer sequence generation is not available when a frequency offset is being applied to the Line Rate.

  • Page 68

    Selecting Test Features Adding Pointer Adjustments Pointer Sequence T1.105 A3 PHASE Phase transient pointer adjustment burst test sequence. All TRANSIENT adjustments are of the same polarity, which is selectable. The GR-253 5031 interval between bursts is fixed at 30 seconds. Each burst consists of 7 pointer movement.

  • Page 69

    Selecting Test Features Adding Pointer Adjustments Pointer Sequence GR-253 5-32(c) This selection is only available if you have selected VT1.5 mapping. PERIODIC ADD (26-1 The sequence pattern is 26 pointer movements followed by 1 Pattern) missing pointer movement. The added adjustment occurs 2 ms after the 13th pointer adjustment.

  • Page 70

    Selecting Test Features Adding Pointer Adjustments Table 1 Pointer Sequences Available with Selected Mapping POINTER SEQUENCE A1 SINGLE A2 BURST OF 3 A3 PHASE TRANSIENT A4 PERIODIC NORMAL(87-3) A4 PERIODIC NORMAL (Continuous) PERIODIC NORMAL (26-1) A5 PERIODIC ADD (87-3) A5 PERIODIC ADD (Continuous) PERIODIC ADD (26-1) A5 PERIODIC CANCEL (g) 87-3 A5 PERIODIC CANCEL (Continuous)

  • Page 71: Using Pointer Graph Test Function

    Selecting Test Features Using Pointer Graph Test Function Using Pointer Graph Test Function Pointer Graph shows the relative offset during the measurement period. This allows the time relationship of SPE or VT pointer movements to be observed. Up to 4 days of storage allows long term effects such as Wander to be observed.

  • Page 72

    Selecting Test Features Using Pointer Graph Test Function If, during a long term measurement (4 days), an event occurs at a particular time each day, a short term measurement can be made at the identified time to gain more detail of the event. 3 Choose the POINTER UNDER TEST type.

  • Page 73: Stressing Optical Clock Recovery Circuits

    Selecting Test Features Stressing Optical Clock Recovery Circuits Stressing Optical Clock Recovery Circuits Description Ideally clock recovery circuits in the network equipment optical interfaces should recover the clock even in the presence of long strings of 0’s. You can check the performance of your optical clock recovery circuits using the STRESS TEST test function.

  • Page 74: Generating Automatic Protection Switch Messages

    Selecting Test Features Generating Automatic Protection Switch Messages Generating Automatic Protection Switch Messages Description You can program the K1 and K2 bytes to exercise the APS functions for Both LINEAR (ITU-T G.783) and RING (ITU-T G.841) topologies. HOW TO: 1 Set up the SONET transmit interface and payload required. See "Setting SONET Transmit Interface "...

  • Page 75: Inserting & Dropping Data Communications Channel

    Selecting Test Features Inserting & Dropping Data Communications Channel Inserting & Dropping Data Communications Channel Description The Data Communications Channel (DCC) of the regenerator and multiplexer section overhead can be verified by protocol testing. The Insert and Drop capability provides access to the DCC via the RS-449 connector on the front panel of the Multirate Analyser module.

  • Page 76

    Selecting Test Features Inserting & Dropping Data Communications Channel...

  • Page 77

    Making Measurements...

  • Page 78: Using Overhead Ber Test Function

    Making Measurements Using Overhead BER Test Function Using Overhead BER Test Function Description You can perform a Bit Error Rate test on chosen bytes of the section, line and path overhead bytes. You can access the transmit Overhead BER on the TEST FUNCTION HOW TO: 1 Set up the SONET transmit interface and payload required.

  • Page 79: Test Timing

    Making Measurements Test Timing Test Timing Description There are two aspects to test timing: • Error results may be displayed as short term or cumulative over the measurement period.If short term error measurements are required, the short term period may be selected. •...

  • Page 80: Making Sonet Analysis Measurements

    Making Measurements Making SONET Analysis Measurements Making SONET Analysis Measurements Description G.826, M.2101, M.2110 and M.2120 analysis results are provided for all relevant SONET error sources. In addition the following results are provided: Cumulative error count and error ratio Short Term error count and error ratio Alarm Seconds Frequency Pointer Values...

  • Page 81: Making Dsn Analysis Measurements

    Making Measurements Making DSn Analysis Measurements Making DSn Analysis Measurements Description G.821, G.826, M.2100, M.2110 and M.2120 analysis results are provided for all relevant DSn and DSn Payload error sources. In addition the following results are provided: Cumulative error count and error ratio Short Term error count and error ratio Alarm Seconds SIG/BIT Monitor.

  • Page 82: Measuring Frequency

    Making Measurements Measuring Frequency Measuring Frequency Description The signal frequency and the amount of offset from the standard rate can be measured to give an indication of probability of errors. 1 Connect the signal to be measured to the IN port of the DSN Receive HOW TO: module or the IN port of the Multirate Analyzer module (SONET electrical) or the IN port of the Optical Interface module (SONET...

  • Page 83: Measuring Optical Power

    Making Measurements Measuring Optical Power Measuring Optical Power Description Optical power measurement can be performed on the SONET signal connected to the Optical module IN port. HOW TO: 1 Connect the SONET optical signal to the IN port of the Optical Interface module.

  • Page 84: Measuring Round Trip Delay

    The time taken for voice traffic to pass through the network is very important. Excessive delay can make speech difficult to understand. The Round Trip Delay feature of the HP 37718A measures the delay in a 64 kb/s timeslot. A test pattern is transmitted in the 64 kb/s timeslot and a timer is set running.

  • Page 85

    Making Measurements Measuring Round Trip Delay 4 Choose ACTION to start the measurement. If measuring on an SONET interface, the results are available on the DSn PAYLOAD RESULTS If measuring on a DSn interface, the results are available on the display.

  • Page 86: Monitoring Signaling Bits

    Making Measurements Monitoring Signaling Bits Monitoring Signaling Bits Description The HP 37718A receiver can be used to monitor the state of signaling bits in received 2 Mb/s signals with timeslot-16 CAS multiframing (PCM30 or PCM30CRC) and DS1 structured signals. 2.048 Mb/s...

  • Page 87: Measuring Service Disruption Time

    Making Measurements Measuring Service Disruption Time Measuring Service Disruption Time Description: Protection switching ensures that data integrity is maintained and revenue protected when equipment failure occurs. The speed of operation of the protection switch can be measured. The sequence of events involved in measuring the switching time is: •...

  • Page 88

    Making Measurements Measuring Service Disruption Time N OTE At DS1 and DS3 Service Disruption results are only available for Unstructured payloads. Error Burst Definition Error bursts start and finish with an error. Bursts of less than 10 us are ignored. Bursts are assumed to have completed when >2000ms elapses without any errors being received.

  • Page 89

    Making Measurements Measuring Service Disruption Time 4 Press to start the measurement. RUN/STOP 5 Invoke the protection switch. 6 View the results on the display. SRVC DISRUPT RESULTS Results Displayed LONGEST - Longest burst of errors during measurement. SHORTEST - Shortest burst of errors during measurement. LAST - Length of last burst of errors detected during measurement.

  • Page 90: Performing A Sonet Tributary Scan

    Pattern Loss. A failure is indicated by highlighting the tributary in which the failure occurred. The MAIN SETTINGS The HP 37718A will configure the Transmitter to the Receiver and the PATTERN is forced to the payload it will fill. TIP: The SONET Tributary Scan display can be logged to the chosen logging device.

  • Page 91

    SONET TRIBSCAN The Scan can be started on the display or the If the Scan is started on the display, the HP 37718A changes to the If a single path, for example, MAPPING Tributary Scan is disabled. N OT E The keyboard is locked during tributary scan.

  • Page 92: Performing An Sonet Alarm Scan

    Making Measurements Performing an SONET Alarm Scan Performing an SONET Alarm Scan Description SONET Alarm Scan tests each channel for alarm free operation and identifies and indicates any Unequipped channels. You can configure the Scan to check for the occurrence of any Path layer CV errors above a chosen threshold.

  • Page 93: Performing A Dsn Alarm Scan

    Making Measurements Performing a DSn Alarm Scan Performing a DSn Alarm Scan Description DSn Alarm Scan tests each channel for the following alarms: Frame Loss The channel in which an alarm occurs is highlighted. HOW TO: 1 Set up the receive DSn interface as required. See “Setting DSn Receive Interface”...

  • Page 94: Measuring Jitter

    Making Measurements Measuring Jitter Measuring Jitter Description: Jitter and error measurements are made simultaneously when a jitter option is fitted. The measurements are made on the normal input to the DSn or SONET receiver and the interface selections are the normal DSn or SONET Receiver selections.

  • Page 95

    Making Measurements Measuring Jitter 3 If performing a Jitter Tolerance measurement, See “Measuring Jitter Tolerance” page 89. If performing a Jitter Transfer measurement, See “Measuring Jitter Transfer” page 92. 4 Press to start the measurement. RUN/STOP 5 You can view the Jitter hits and Amplitude results on the display.

  • Page 96: Measuring Extended Jitter

    Making Measurements Measuring Extended Jitter Measuring Extended Jitter Description: Extended jitter measurements are made in a jitter bandwidth of 0.1 Hz to 25 kHz. These measurements are made at the upper end of the standard wander frequency range and the lower end of the standard jitter frequency range.

  • Page 97: Measuring Wander

    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.

  • Page 98

    Making Measurements Measuring Wander 4 If measuring wander at a SONET rate set up the SONET receive interface. See, “Setting SONET Receive Interface” page 17. 5 Choose MEASUREMENT TYPE 6 Choose the WANDER HIT THRESHOLD level - if the received wander exceeds the value chosen a wander hit is recorded.

  • Page 99: Measuring Jitter Tolerance

    Making Measurements Measuring Jitter Tolerance Measuring Jitter Tolerance Description: The jitter auto tolerance feature provides jitter tolerance measurements within the relevant ITU-T mask, G.823 for DSn, G.958, G.825 and Bellcore GR-253 for SONET. Jitter is generated at a range of frequencies within the mask and an error measurement is made.

  • Page 100

    Making Measurements Measuring Jitter Tolerance 2 If you are performing jitter tolerance on the SONET signal, set up the SONET transmit and receive interfaces. See “Setting SONET Transmit Interface” page 4 and “Setting SONET Receive Interface” page 17. 3 If SONET is chosen as the interface, choose the SONET MASK. TYPE A masks as per ITU-T G.958 have good jitter tolerance and the mask corner points are modified to compensate.

  • Page 101

    Making Measurements Measuring Jitter Tolerance HOW TO: View the Results 1 Choose the results FORMAT. GRAPH ITU-T mask is displayed. TEXT displayed, Point number, Frequency, Mask amplitude, Tolerance, Result. If applicable, results 13 through 55 can be viewed on pages 2 through If you wish to log the jitter tolerance results to a printer, See “Logging Jitter Tolerance Results”...

  • Page 102: Measuring Jitter Transfer

    HOW TO: Achieve the required accuracy: 1 The HP 37718A must be connected back to back in order to perform a calibration cycle before making a Jitter Transfer measurement. 2 The HP 37718A must have been switched on for 1 hour before starting a calibration cycle.

  • Page 103

    Making Measurements Measuring Jitter Transfer HOW TO: Perform Jitter Transfer Calibration N OT E The CALIBRATION should always be carried out with LEVEL TERMINATE 1 If DSn Jitter Transfer is required, set up the DSn transmit and receive interfaces, the receive jitter interface and connect DSn IN to DSn OUT. See “Setting DSn Transmit Interface”...

  • Page 104

    Making Measurements Measuring Jitter Transfer 4 Choose JITTER TRANSFER FUNCTION display. 5 Choose the NUMBER OF POINTS at which jitter is transmitted (3 to 6 Choose the DWELL TIME - the time jitter is generated at each jitter frequency point (5 to 30 seconds). 7 Choose the DELAY TIME - the time delay between the jitter frequency/amplitude being applied and the error measurement being made.

  • Page 105

    Making Measurements Measuring Jitter Transfer HOW TO: Start the Jitter Transfer Measurement N OT E The Jitter Transfer measurement must be started within 10 minutes of the completion of calibration. 1 After the CALIBRATION is completed, remove the back to back connection from the DSn or SONET or optical interfaces.

  • Page 106

    Making Measurements Measuring Jitter Transfer HOW TO: View the Results 1 Choose the results FORMAT. GRAPH ITU-T mask is displayed. TEXT displayed: Point number, Frequency, Mask amplitude (dB), Jitter Gain (dB), Result. If applicable, results 13 through 55 can be viewed on pages 2 through 2 If GRAPH WIDE...

  • Page 107

    Storing, Logging and Printing...

  • Page 108: Saving Graphics Results To Instrument Store

    Storing, Logging and Printing Saving Graphics Results to Instrument Store Saving Graphics Results to Instrument Store Description Graphical representation of measurement results is very useful particularly during a long measurement period. It provides an overview of the results and can be printed for record keeping. Graphics results can be stored in instrument graph storage or on floppy disk.

  • Page 109: Recalling Stored Graph Results

    Storing, Logging and Printing Recalling Stored Graph Results Recalling Stored Graph Results Description Results stored from a previous measurement can be recalled to the graphics displays for viewing and printing. HOW TO: 1 If currently viewing the bar graph display, select STORE STATUS select 2 Using...

  • Page 110

    Storing, Logging and Printing Recalling Stored Graph Results The top row of the display comprises five fields: Store Memory location in which the displayed bar graph data is stored. Move the highlighted cursor, to the STORE location desired, using Start Date The start date of the test, which produced the stored results.

  • Page 111: Viewing The Bar Graph Display

    Storing, Logging and Printing Viewing the Bar Graph Display Viewing the Bar Graph Display Description All the graphic results obtained during the measurement are available for viewing. Identify a period of interest and zoom in for more detailed examination. HOW TO: 1 To view the current bar graphs, press CHANGE UPPER required.

  • Page 112

    Storing, Logging and Printing Viewing the Bar Graph Display Zoom The width, in minutes, of each "bar" in the bar graph, controlled by Cursor The cursor position in terms of time and date, controlled by in steps of 1 second, 1 minute, 15 minutes or 60 minutes dependent upon the ZOOM setting.

  • Page 113: Viewing The Graphics Error And Alarm Summaries

    Storing, Logging and Printing Viewing the Graphics Error and Alarm Summaries Viewing the Graphics Error and Alarm Summaries Description The error and alarm summaries of the measurement chosen are displayed on the summary can be viewed at any time. HOW TO: 1 To view the error or alarm summary associated with the current bar graphs, press 2 To view the error or alarm summary associated with previously stored...

  • Page 114

    Storing, Logging and Printing Viewing the Graphics Error and Alarm Summaries Start The start time and date of the test, that produced the displayed results. Stop The stop time and date of the test, that produced the displayed results.

  • Page 115: Logging Graph Displays

    If Option 601, Remote Control, is fitted, the bar graphs and error and alarm summary can be logged to an external HP DeskJet printer at the end of the test period. If a printer is not immediately available, the graphics results remain in memory and can be logged at a later time when a printer becomes available.

  • Page 116

    Storing, Logging and Printing Logging Graph Displays 4 Choose to confirm or abort the print. To confirm the print and only print the portion of the graph displayed and the summaries choose To confirm the print and print the graph for the whole measurement period and the summaries choose To abort the print choose 5 To log the selected Error and Alarm summaries to the printer, choose...

  • Page 117: Logging Results

    Storing, Logging and Printing Logging Results Logging Results Description Test Period Logging If degradations in system performance can be observed at an early stage, then the appropriate remedial action can be taken to maximize circuit availability and avoid system crashes. Test period logging allows you to monitor the error performance of your circuit.

  • Page 118

    Storing, Logging and Printing Logging Results • Optional Internal printer fitted into the instrument front cover (Option 602) • External HP-IB printer (option 601) • External RS-232-C printer (option 601) • External Parallel Port printer (option 601) • Disk Drive HOW TO: 1 Choose LOGGING [ON] - enables the logging of results and alarms.

  • Page 119

    If RS232 is chosen, see "Logging Results to RS-232-C Printer " page 119. If HPIB is chosen, see "Logging Results to HP-IB Printer " page 117. If PARALLEL is chosen, see "Logging Results to Parallel (Centronics) Printer " page 116.

  • Page 120: Logging On Demand

    2 Choose the logging DEVICE. If RS232 is chosen, see "Logging Results to RS-232-C Printer " page 119. If HPIB is chosen, see "Logging Results to HP-IB Printer " page 117. is pressed the chosen results are logged to the chosen PRINT NOW is pressed.

  • Page 121

    Storing, Logging and Printing Logging on Demand If PARALLEL is chosen, see "Logging Results to Parallel (Centronics) Printer " page 116. If DISK is chosen, see “Saving Data Logging to Disk” page 142. If Option 602, Internal Printer, is fitted and INTERNAL is chosen, see "Logging Results to Internal Printer "...

  • Page 122: Logging Jitter Tolerance Results

    3 Choose 80 character column width ( width ( 4 If logging to an HP-IB printer, connect an HP-IB printer to the HPIB port. See "Logging Results to HP-IB Printer " page 117. 5 If logging to an RS-232-C printer, connect an RS-232-C printer to the RS232 port.

  • Page 123

    Storing, Logging and Printing Logging Jitter Tolerance Results 7 Choose 80 character column width ( width ( ) according to the capabilities of your printer. COMPRESS 8 Choose the same baud SPEED as chosen on your printer. 9 Choose the PROTOCOL required for the transfer of logging data. 10 Choose LOGGING display.

  • Page 124: Logging Jitter Transfer Results

    3 Choose 80 character column width ( width ( 4 If logging to an HP-IB printer, connect an HP-IB printer to the HPIB port. See "Logging Results to HP-IB Printer " page 117. 5 If logging to an RS-232-C printer, connect an RS-232-C printer to the RS232 port.

  • Page 125

    Storing, Logging and Printing Logging Jitter Transfer Results width ( ) according to the capabilities of your printer. COMPRESS 8 Choose the same baud SPEED as chosen on your printer. 9 Choose the PROTOCOL required for the transfer of logging data. 10 Choose LOGGING display.

  • Page 126: Logging Results To Parallel (centronics) Printer

    HOW TO: 1 Connect the Parallel printer to the PARALLEL port. See "Connecting an HP 850C DeskJet Printer to a Parallel Port " page 121. 2 If a non HP printer is connected choose ALT PRINTER. Choose character column width according to the capabilities of your printer.

  • Page 127: Logging Results To Hp-ib Printer

    Logging Results to HP-IB Printer Description If Option 601, Remote Control Interface, is fitted, you can log the results and alarms to an external HP-IB printer connected to the HP-IB port. HOW TO: 1 Connect an HP-IB printer to the HPIB port.

  • Page 128: Logging Results To Internal Printer

    Storing, Logging and Printing Logging Results to Internal Printer Logging Results to Internal Printer Description If Option 602, Internal Printer is fitted, you can log the results and alarms to the in-lid printer. HOW TO: 1 Choose the LOGGING SETUP required.

  • Page 129: Logging Results To Rs-232-c Printer

    N OT E Choosing RS232 external printer for logging prevents the use of RS-232-C remote control. 2 If a non HP printer is connected choose ALT PRINTER. Choose character column width according to the capabilities of your printer. 3 Choose the LOGGING SETUP required.

  • Page 130: Printing Results From Disk

    Printing Results from Disk Printing Results from Disk Description The results and alarms you logged to Disk can be printed by removing the Disk from the HP 37718A and inserting it into a personal computer (PC). HOW TO: Print from DOS Prompt copy/b a:\<filename>...

  • Page 131: Connecting An Hp 850c Deskjet Printer To A Parallel Port

    PARALLEL port. C AU TI ON Do not connect a serial printer e.g. RS-232-C or HPIB to the HP 37718A Parallel port as this will damage the interface. 1 Connect the HP 37718A Parallel port to the HP 850C DeskJet Parallel HOW TO: port using printer cable HP part number 24542D.

  • Page 132: Changing Internal Printer Paper

    Storing, Logging and Printing Changing Internal Printer Paper Changing Internal Printer Paper Description The printer accepts rolls of thermal paper with the following dimensions: Width: Maximum Outside Diameter: 40 mm Inside Core Diameter: Suitable rolls of paper are available from Hewlett Packard, Part Number 9270-1360.

  • Page 133

    The paper must be installed such that when it is in the print mechanism, the sensitive side (slightly shiny) is the underside. The illustrations here show the correct fitting for HP 9270-1360 paper which has the sensitive side on the outside of the roll.

  • Page 134

    Storing, Logging and Printing Changing Internal Printer Paper 6 If the printer paper is incorrectly aligned, raise the printer mechanism front cover to releases the paper drive and realign the paper. LIFT TO ADJUST PAPER ALIGNMENT...

  • Page 135: Cleaning Internal Printer Print Head

    Storing, Logging and Printing Cleaning Internal Printer Print Head Cleaning Internal Printer Print Head Description The print head should be cleaned when broken or light characters occur in a vertical line on the page. To maintain a high quality print, clean the print head after 200 to 300 prints.

  • Page 136

    Storing, Logging and Printing Cleaning Internal Printer Print Head...

  • Page 137

    Using Instrument and Disk Storage...

  • Page 138: Storing Configurations In Instrument Store

    SETTING NUMBER [0]. This store is used to set the instrument to a known state, the FACTORY DEFAULT SETTINGS. HOW TO: 1 Set the HP 37718A to the configuration you wish to store. 2 Choose the STORED SETTING NUMBER to receive the configuration.

  • Page 139: Titling Configuration In Instrument Store

    Using Instrument and Disk Storage Titling Configuration in Instrument Store Titling Configuration in Instrument Store Description When storing configurations, you can give them an easily remembered title for identification at a later date. HOW TO: 1 Choose the STORED SETTING NUMBER which contains the stored configuration.

  • Page 140: Recalling Configurations From Instrument Store

    Using Instrument and Disk Storage Recalling Configurations from Instrument Store Recalling Configurations from Instrument Store Description Having stored a configuration for future use, you must be able to recall that configuration in the future. HOW TO: 1 Choose the STORED SETTING NUMBER which contains the stored configuration.

  • Page 141: Formatting A Disk

    N OT E Disks can be formatted in an IBM compatible PC (1.44M, MS-DOS only) but it is recommended that the disk is formatted in the HP 37718A as this will ensure full compatibility with the Floppy Disk power fail recovery included in the HP 37718A.

  • Page 142: Labeling A Disk

    Using Instrument and Disk Storage Labeling a Disk Labeling a Disk Description You can label your disks for ease of identification. HOW TO: 1 Choose DISK OPERATION 2 Label the Disk using 3 Choose The label is displayed at the bottom of the display to confirm the operation has taken place.

  • Page 143: Managing Files And Directories On Disk

    Using Instrument and Disk Storage Managing Files and Directories on Disk Managing Files and Directories on Disk Description File and Directory structures can be important in speeding up the transfer of data between the instrument and the disk drive. It is recommended that you create a directory structure as an aid to efficient file management particularly when the disk is moved to a PC.

  • Page 144

    Using Instrument and Disk Storage Managing Files and Directories on Disk Accessing Directories and Files 1 Choose DISK OPERATION 2 Choose FILE TYPE you wish to view. This acts as a filter on the filename extension: CONFIGURATION DATA LOGGING 3 Move the highlighted cursor to the NAME field and press N OTE <DIR>...

  • Page 145

    Using Instrument and Disk Storage Managing Files and Directories on Disk N OT E Title Bar - File types displayed and current directory. (cannot be highlighted). <DIR> - Current Directory. <DIR> - Parent directory. Move highlighted cursor to this line and press SONET1.PRN - File (with named extension) in current directory.

  • Page 146

    Using Instrument and Disk Storage Managing Files and Directories on Disk Renaming a File on Disk Description Files can be renamed as an aid to efficient file management. HOW TO: 1 Choose DISK OPERATION 2 Enter the FROM filename using Choose the directory which contains the file to be renamed.

  • Page 147

    Using Instrument and Disk Storage Managing Files and Directories on Disk Deleting a File on Disk Description Obsolete files can be deleted as an aid to efficient file management. HOW TO: Choose DISK OPERATION 2 Choose the directory containing the file to be deleted. See "Accessing Directories and Files "...

  • Page 148

    Using Instrument and Disk Storage Managing Files and Directories on Disk Deleting a Directory on Disk Description Obsolete Directories should be deleted as an aid to efficient file management. N OTE A directory cannot be deleted until all the files within the directory have been deleted.

  • Page 149

    Using Instrument and Disk Storage Managing Files and Directories on Disk Adding Descriptors to Disk Files Description When storing configurations or graphics on disk, you can give them an easily remembered descriptor for identification at a later date. Descriptors can be added to .CNF and .SMG files. HOW TO: 1 Choose the directory containing the file you wish to add the descriptor to.

  • Page 150: Saving Graphics Results To Disk

    Using Instrument and Disk Storage Saving Graphics Results to Disk Saving Graphics Results to Disk Description Graphics results can be saved to a file on disk. Two methods of naming the file, which is created when the measurement is started, are available: Automatic Your Choice HOW TO:...

  • Page 151

    Using Instrument and Disk Storage Saving Graphics Results to Disk 2 Choose the directory in which to save the graphics results. See "Accessing Directories and Files " page 134. 3 If you wish to enter your own choice of filename, choose DISK OPERATION FILE TYPE SAVE...

  • Page 152: Saving Data Logging To Disk

    Using Instrument and Disk Storage Saving Data Logging to Disk Saving Data Logging to Disk Description Data Logging can be saved to a file on disk. The disk can be transferred to a personal computer (PC) and the logging investigated at a later date. HOW TO: 1 Choose the directory in which to save the logging results.

  • Page 153: Saving Configurations To Disk

    HOW TO: 1 Set the HP 37718A to the configuration you wish to store. 1 Choose the directory in which you wish to save the HP 37718A configuration. See "Accessing Directories and Files " page 134. 2 Choose DISK OPERATION enter the filename using...

  • Page 154: Recalling Configuration From Disk

    Using Instrument and Disk Storage Recalling Configuration from Disk Recalling Configuration from Disk Description If a configuration has been stored on disk, you will need to recall it at some time in the future to configure the instrument. HOW TO: 1 Choose the directory that contains the configuration file to be recalled.

  • Page 155: Recalling Graphics Results From Disk

    Using Instrument and Disk Storage Recalling Graphics Results from Disk Recalling Graphics Results from Disk Description If graphic results have been stored on disk, you will need to recall them in able to view the results on the HOW TO: 1 Choose the directory that contains the graphics file to be recalled.

  • Page 156: Copying Configuration From Instrument Store To Disk

    If you have a configuration stored in the instrument store that you wish to use on another instrument, you can copy it to disk. The configuration can then be downloaded from the disk in to another HP 37718A with the same options as the original instrument.

  • Page 157

    Using Instrument and Disk Storage Copying Configuration from Instrument Store to Disk 3 To copy the configuration from instrument to Disk choose If you have entered a filename which already exists, a warning "File exists - are you sure you wish to continue" is displayed. If YES is selected, the data on the Disk will be overwritten.

  • Page 158: Copying Configuration From Disk To Instrument Store

    If you have a configuration stored in the instrument store that you wish to use on another instrument, you can copy it to Disk. The configuration can then be downloaded from the disk in another HP 37718A with the same options as the original instrument.

  • Page 159

    Using Instrument and Disk Storage Copying Configuration from Disk to Instrument Store 4 To copy the configuration from Disk to instrument, choose If you have entered a instrument store number which already contains a configuration, a warning "Are you sure you wish to continue" is displayed.

  • Page 160: Copying Graphics Results From Instrument Store To Disk

    Using Instrument and Disk Storage Copying Graphics Results from Instrument Store to Disk Copying Graphics Results from Instrument Store to Disk Description You can copy Graphics Results from the instrument store to the Disk. This is useful under the following conditions: •...

  • Page 161

    4 If you wish to view the graphic results at a later date via a spreadsheet, choose FORMAT Variable. If you wish to view the graphic results at a later date on an HP 37718A, choose FORMAT 5 To copy the configuration from instrument to Disk, choose If you have entered a filename which already exists, a warning "File...

  • Page 162

    Using Instrument and Disk Storage Copying Graphics Results from Instrument Store to Disk...

  • Page 163

    Selecting and Using "Other" Features...

  • Page 164: Coupling Transmit And Receive Settings

    Selecting and Using "Other" Features Coupling Transmit and Receive Settings Coupling Transmit and Receive Settings Description When generating and measuring at the same interface level, you can have the transmit and receive settings coupled together. Any settings change made on the transmit display will automatically occur on the receive display.

  • Page 165: Setting Time & Date

    Selecting and Using "Other" Features Setting Time & Date Setting Time & Date Description When making Bit error measurements and recording results you can have certain events timed chronologically, for example, Alarms; Error Seconds. The capability to set the Time and Date is provided on the TIME &...

  • Page 166: Enabling Keyboard Lock

    Enabling Keyboard Lock Description You can protect the measurement settings from interference during a test. This function is provided in the HP 37718A on the MISCELLANEOUS The following keys are not affected by Keyboard Lock: • Display keys • cursor keys •...

  • Page 167: Enabling Beep On Received Error

    Description You can have an audible indication of an error which is particularly useful when the display on the test set is hidden from view. This function is provided in the HP 37718A on the MISCELLANEOUS HOW TO: 1 Choose BEEP ON RECEIVED ERROR display.

  • Page 168: Suspending Test On Signal Loss

    Selecting and Using "Other" Features Suspending Test on Signal Loss Suspending Test on Signal Loss When running a test, you can choose to suspend the test during periods of signal loss. This function is available on the OTHER display. MISCELLANEOUS HOW TO: 1 Choose SUSPEND TEST ON SIGNAL LOSS...

  • Page 169: Setting Error Threshold Indication

    When making error measurements, you can have an indication of when an error count or error ratio threshold has been exceeded. You can set the HP 37718A to indicate this by a color change, from yellow to red, of the bar on the can choose the thresholds at which the color change occurs.

  • Page 170: Setting Screen Brightness And Color

    Setting Screen Brightness and Color Setting Screen Brightness and Color Description The HP 37718A screen can be set to single or two color using the COLOR PALETTE selection on the The screen brightness can be set to full or half brightness.

  • Page 171: Dumping Display To Disk

    Selecting and Using "Other" Features Dumping Display to Disk Dumping Display to Disk Description The chosen display may be stored on disk in bitmap format using the Screen Dump feature of the HP37718A. Logging and Floppy Disk must be set up for screen dump. The current display is stored on disk when PRINT NOW HOW TO: 1 Choose LOGGING SETUP...

  • Page 172

    Selecting and Using "Other" Features Dumping Display to Disk 4 Choose the directory in which to save the Screen Dump. See "Accessing Directories and Files " page 134. 5 If you wish to enter your own choice of filename, choose DISK OPERATION N OTE You have the option of an auto generated filename or entering your chosen...

  • Page 173: Running Self Test

    Running Self Test Description Before using the HP 37718A to make measurements, you can run Self Test ALL TESTS to ascertain the integrity of the HP 37718A. These tests take between at least 1 hour to complete depending on the options fitted.

  • Page 174

    Selecting and Using "Other" Features Running Self Test N OTE If any or all of these connections are not made the HP 37718A will FAIL Self Test. 4 Press will be displayed. The information pertaining to TEST TYPE, TEST NUMBER and SUBTEST NUMBER will change as the Self Test progresses.

  • Page 175

    The information pertaining to TEST TYPE, TEST NUMBER and SUBTEST NUMBER will change as the Self Test progresses. If the HP 37718A is functioning correctly, after a time of 2 to 3minutes, TEST STATUS PASSED is displayed. If TEST STATUS [FAIL nnn] is displayed, the HP 37718A should be returned to a service office for repair.

  • Page 176

    Selecting and Using "Other" Features Running Self Test...

  • Page 177

    Appendix A STS-1 SPE Background Patterns The following tables list the background patterns available when selecting specific foregrounds.

  • Page 178

    STS-1 SPE Background Patterns Table 2 STS-1 SPE Background Patterns Foreground STS-1 SPE VT-6 Pattern in other VT-6s is numbered. They contain the word 11NNNNNx, where NNNNN is the binary number of the TU. VT-2 (2 Mb/s) VT-2 structure, unframed with 2E15-1, 2E9-1 Unframed PRBS or 1100 word pattern in all information bits.

  • Page 179: Etsi/ansi Terminology

    Appendix B ETSI/ANSI Terminology A table of ETSI terms with their ANSI equivalents.

  • Page 180: Etsi/ansi Conversion And Equivalent Terms

    Table 3 ETSI / ANSI Terminology ETSI Term AU-3 AU-4 BIP (Bit Interleaved parity) High Order Path (HP / HO) I-n Intra Office, (n=STM-n level) L-n.1 or L-n.2 long haul Low Order Path (LP / LO) LP-REI M.S.P Multiplexer Section (MS)

  • Page 181

    ETSI / ANSI Terminology , continued ETSI Term MS-RDI Multiplexer Section Overhead Network Node Interface Path AIS / AU-AIS Path REI / HP REI Path FERF / HP RDI Path IEC / AU-IEC Path Overhead Regenerator Regenerator Section (RS) Regenerator Section Overhead...

  • Page 182

    ETSI/ANSI Terminology ETSI/ANSI Conversion and Equivalent Terms Table 3 ETSI / ANSI Terminology , continued ETSI Term TU-11 TU-12 TU-2 TU-3 TU BIP TU RDI / LP-RDI TUG2 TUG3 TU multiframe TU PATH AIS Virtual Container (VC) NOTE: VC is an ETSI abbreviation for Virtual Container and an ETSI / ANSI abbreviation for (ATM) Virtual Channel.

  • Page 183

    Index Alarm scan DSn, 83 SONET, 82 Alarms & errors DSn add, 50 DSn payload add, 50 SONET add, 49 Analysis measurement DSn, 71 DSn payload, 71 SONET, 70 APS messages generation, 64 monitoring, 25 test function, 64 Automatic protection switch message generation, 64 Autotolerance, 89 B/G mapping selection SONET, 5...

  • Page 184

    98 storage resolution, 98 viewing error & alarm summaries, 103 viewing the bar graphs, 101 H4 byte sequence setting, 23 HP path label monitoring, 25 HP-IB printer, 117 Insert DCC, 65 external payload/test signal, 43 Internal printer...

  • Page 185

    Print head cleaning, 125 Printer Centronics, 116 Centronics, connecting to parallel port, Centronics, logging to, 116 HP-IB, logging to, 117 internal, changing paper, 122 internal, cleaning print head, 125 internal, logging to, 118 RS-232-C, logging to, 119 Printing results from disk, 120...

  • Page 186

    Index APS messages, 64 DCC insert, 65 errors & alarms DSn, 50 errors & alarms SONET, 49 MSP messages, 64 overhead BER test, 68 overhead capture, 29 pointer adjustments, 54 pointer graph, 61 sequence generation, 27 spare bits, 53 stress test, 63 tributary scan, 80 Test period selection, 69 Test signal...

  • Page 187

    Hewlett-Packard Sales and Service Offices If you need technical assistance with a Hewlett-Packard test and measurement product or application please contact the Hewlett-Packard office or distributor in your country. Asia Pacific: Hong Kong: Tel: (852) 2599 7889 India: Tel: (91-11) 682-6000 Japan: Hewlett-Packard Japan Ltd.

  • Page 188

    Hewlett-Packard Sales and Service Offices (cont’d) Finland: Tel: (90) 88 721 France: Tel: (0)1 69.82.60.60 Germany: Tel: (0180) 532 62-33 Greece: Tel: 30-1-7264045 Hungary: Tel: 36-1-4618219 Ireland: Tel: (01) 284 4633 Israel: Tel: 972-3-5380333 Italy: Tel: 02 - 92 122 241 Netherlands: Tel: (020) 547 6669 Norway:...

  • Page 189

    About This Edition This is the 2nd edition of the DSn/SONET Users Guide. It documents the product as of December 1998. Edition dates are as follows: 1st Edition, Sept. 1998 2nd Edition, Dec. 1998 Copyright Hewlett- Packard Ltd. 1998. All rights reserved.

  • Page 190

    In This Book This book tells you how to select and use the various instrument functions available. Printed in U.K. 12/98 37718-90022...

This manual also for:

37718a omniber 718

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