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Wavetek ANT-20 Operating Manual

Manual is about: Advanced network tester

Summary of ANT-20

  • Page 1

    B n 30 35 /9 8 .32 ant-20, ant-20e advanced network tester broadband analyzer/generator bn 3035/90.80 software version 7.20 operating manual 9.

  • Page 2

    Please direct all enquiries to your local wavetek wandel goltermann sales company. The addresses are given at the end of this handbook. Copyrights this product or parts of it are based upon recommendations and/or standards of the standardization sector of the international telecommunication union - ...

  • Page 3: Contents

    Ant-20/ant-20e broadband analyzer/generator i contents introduction 1 main applications of the broadband analyzer/generator . . . . . . . .I-1 2 application concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .I-2 3 test applications . . . . . . . . . . . . . . . . . ...

  • Page 4

    Broadband analyzer/generator ant-20/ant-20e ii 4 port configurations (topologies) and instrument configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O-16 4.1 overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O-16 4.2 the “instrument conf...

  • Page 5

    Ant-20/ant-20e broadband analyzer/generator iii 6.3.2 the “header/address” index card . . . . . . . . . . . . . . . . . . . .O-41 6.3.3 the “traffic contract” index card. . . . . . . . . . . . . . . . . . . . .O-43 6.3.4 the “traffic contract” index card (continued) . . . . . . . . . . .O-44 6.3.5 t...

  • Page 6

    Broadband analyzer/generator ant-20/ant-20e iv 3.4.4 trouble scan: detecting and displaying atm channels where alarms are present . . . . . . . . . . . . . A-27 3.5 selecting options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-29 3.6 sorting channels . . . . . . . . . . . . . ....

  • Page 7

    Ant-20/ant-20e broadband analyzer/generator v 1.5.4 test cell format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3 1.6 source models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-4 1.6.1 constant bit rate model . . . . . . . . . . . . . . . . . . ....

  • Page 8

    Broadband analyzer/generator ant-20/ant-20e vi notes:.

  • Page 9: Introduction

    Ant-20/ant-20e broadband analyzer/generator introduction i-1 introduction 1 main applications of the broadband analyzer/generator atm is set to change the landscape in wans and lans in the coming years. Practically all network operators view atm as a key technology in enabling them to provide the re...

  • Page 10: Application Concept

    Broadband analyzer/generator ant-20/ant-20e i-2 introduction all the test applications have been developed in accordance with the latest information from the standardization bodies atm forum and itu-t to ensure that they are always up to date. Your wavetek wandel goltermann sales partner can supply ...

  • Page 11

    Ant-20/ant-20e broadband analyzer/generator introduction i-3 the diagram below illustrates the steps that the broadband analyzer/generator performs automatically, when a self-call was initiated: 1. Test circuit set up 2. Performance analysis over the test circuit fig. I-3 automatic test sequence for...

  • Page 12

    Broadband analyzer/generator ant-20/ant-20e i-4 introduction all test applications are supported by a practical application and channel database. In the simplest scenario, an application is called up and started directly. With the atm channel editor a comfortable tool for the extension and handling ...

  • Page 13: Test Applications

    Ant-20/ant-20e broadband analyzer/generator introduction i-5 3 test applications 3.1 atm performance analysis the basic version of the tester supports analysis of the atm layer “quality of service”. Measurements are performed in conformance with itu-t recommendation o.191, “specifications of measuri...

  • Page 14

    Broadband analyzer/generator ant-20/ant-20e i-6 introduction 3.3 uni signaling tests the “signaling emulation” function allows you to test the signaling characteristics of unis. Signaling emulation provides a rapid “go/no go” assessment of the following: • is it possible to set up a connection? • wh...

  • Page 15

    Ant-20/ant-20e broadband analyzer/generator introduction i-7 4 using and setting up the broadband analyzer/generator the broadband analyzer/generator is a flexible test concept for performing tests on the various protocol layers. The diagram shows the points of access that the atm tester can use wit...

  • Page 16

    Broadband analyzer/generator ant-20/ant-20e i-8 introduction 5 overview: virtual instruments, “vis” to make it easier to locate and operate the large number of instrument functions, a user interface was developed for the ant-20 family of instruments that makes use of the concept of virtual instrumen...

  • Page 17: Often Used Terminology

    Ant-20/ant-20e broadband analyzer/generator introduction i-9 6 often used terminology application an application consists of a suitable collection of virtual instruments (vis for short) used to solve a measurement task. In this way applications can be defined e.G. For physical layer or atm layer mea...

  • Page 18

    Broadband analyzer/generator ant-20/ant-20e i-10 introduction port configuration the port configuration (topology) describes the way in which the test equipment is connected to the device under test on the physical layer. Example topologies: • emulate • looped (between generator and receiver) • moni...

  • Page 19: Operation

    Ant-20/ant-20e broadband analyzer/generator operation o-1 operation 1 atm test control 1.1 introduction task the “atm test control” vi is used to select a test type and to configure the instrument for the selected test type. You can also control the running of the test from this vi if the selected t...

  • Page 20

    Broadband analyzer/generator ant-20/ant-20e o-2 operation restrictions the following virtual instruments cannot be used within a single application at the same time as the “atm test control” vi: “atm signal structure”, “atm background generator” and “atm traffic analyzer” 1.2 “atm test control” wind...

  • Page 21

    Ant-20/ant-20e broadband analyzer/generator operation o-3 toolbar the toolbar buttons provide direct access to the more important functions of the vi. Meanings of icons, from left to right (equivalent menu command shown in brackets): configuration diagram the main window workspace always displays a ...

  • Page 22

    Broadband analyzer/generator ant-20/ant-20e o-4 operation 1.3 important dialog windows the “instrument configuration” dialog the “instrument configuration” dialog is used to set the port configuration or topology for the measurement task and to match the instrument to the protocol layers used. You c...

  • Page 23

    Ant-20/ant-20e broadband analyzer/generator operation o-5 the extended “test setup” dialog the “test setup ” dialog is used to configure the test type and to match it to your measurement task (see sec. 5.9). Fig. O-5 the extended “test setup ” dialog the “channel editor” dialog the channel editor is...

  • Page 24

    Broadband analyzer/generator ant-20/ant-20e o-6 operation the “test online control - ” dialog the source parameters of interest for your measurement task can be altered using the “test online control - ” dialog as the test cell stream is being generated while a measurement is running. Any changes ma...

  • Page 25: Atm Test Results

    Ant-20/ant-20e broadband analyzer/generator operation o-7 2 atm test results 2.1 introduction task the “atm test results” vi is used to display the results of measurements performed using the “atm test control” vi. The results windows are configured depending on the active “test type” set in the “at...

  • Page 26

    Broadband analyzer/generator ant-20/ant-20e o-8 operation fig. O-9 “atm test results” main window menu bar the menu bar contains a range of pulldown menus for selecting the following commands or groups of commands: toolbar the toolbar buttons provide direct access to the more important functions of ...

  • Page 27

    Ant-20/ant-20e broadband analyzer/generator operation o-9 2.3 results window after the measurement has been started, the measurement data are written continuously to the display fields of the individual windows. After the vi is loaded, the workspace contains the following result windows in their def...

  • Page 28

    Broadband analyzer/generator ant-20/ant-20e o-10 operation fig. O-11 “quality of service” results window “signaling analysis” a record of the signaling is made and displayed in the “signaling analysis” window for each measurement on switched virtual circuits (svc). The record is saved in a log file....

  • Page 29: Atm Channel Explorer

    Ant-20/ant-20e broadband analyzer/generator operation o-11 3 atm channel explorer 3.1 introduction task the “atm channel explorer” vi is a tool for observing and interactively analysing activity on an atm link. The channel explorer provides various types of “scans” and “analyses” for this purpose. T...

  • Page 30

    Broadband analyzer/generator ant-20/ant-20e o-12 operation 3.2 “atm channel explorer” window layout and commands the “atm channel explorer” main window with the result list appears after the vi is loaded. The commands for configuring and starting the scan functions are found in the menu bar. In addi...

  • Page 31

    Ant-20/ant-20e broadband analyzer/generator operation o-13 toolbar the toolbar buttons provide direct access to the more important functions of the vi: • triggering the scan function • triggering aal analysis • sorting • preselecting the interface • printing and exporting the results. Meanings of ic...

  • Page 32

    Broadband analyzer/generator ant-20/ant-20e o-14 operation 3.3 results window after the scan has been triggered, the results are saved in the result memory and displayed in the appropriate results window according to the selected scan type. The results memory can store up to 1000 channels per scan. ...

  • Page 33

    Ant-20/ant-20e broadband analyzer/generator operation o-15 scan - trouble “scan - trouble” checks for channels that are in an alarm state. The instrument detects every alarm message cell and enters the corresponding channel in the results list. There are two results windows corresponding to the erro...

  • Page 34: Instrument Configuration

    Broadband analyzer/generator ant-20/ant-20e o-16 operation 4 port configurations (topologies) and instrument configuration vi: atm test control 4.1 overview to simplify the basic setting of the instrument for atm measurements, all the fundamental settings are made from a central dialog. This “instru...

  • Page 35

    Ant-20/ant-20e broadband analyzer/generator operation o-17 the dialog contains the following sections: 4.3 port configuration the radio buttons in the “port configuration” field are used to set the way in which the instrument is connected to the device under test (atm dut). The following topologies ...

  • Page 36

    Broadband analyzer/generator ant-20/ant-20e o-18 operation looped the instrument's generator and receiver are connected to different ports, with the tx signal looped back to the receiver. Using this topology, it is possible to configure the physical layer for different bit rates or mappings for the ...

  • Page 37

    Ant-20/ant-20e broadband analyzer/generator operation o-19 4.4 tx/rx configuration the buttons in the “tx/rx configuration” field are used to configure the individual protocol layers for the tx and rx sides of the instrument. The buttons have the following meanings: note: the most important layer-sp...

  • Page 38

    Broadband analyzer/generator ant-20/ant-20e o-20 operation the buttons and check boxes have the following meanings: additional buttons for “looped” topology: radio buttons/check boxes meaning tx/(rx) settings (a) generator (receiver) side parameters interface interface type “uni” option: user-networ...

  • Page 39

    Ant-20/ant-20e broadband analyzer/generator operation o-21 4.4.2 “edit signal structure” the “physical” button brings the “signal structure” vi to the front if it was previously loaded using the application manager. The relevant parameters such as physical interface, bit rate, frame structure or map...

  • Page 40

    Broadband analyzer/generator ant-20/ant-20e o-22 operation the buttons and check boxes have the following meanings: 4.5.2 the “address input” dialog accessed using the “change address” button. The dialog is used to set the instrument address (own call address). Fig. O-22 the “address input” sub dial...

  • Page 41

    Ant-20/ant-20e broadband analyzer/generator operation o-23 the buttons and check boxes have the following meanings: the “address input - native e.164” box button/check box meaning format (a) address format native e.164 option for e.164 format nsap option for nsap-format address (b) change address fo...

  • Page 42

    Broadband analyzer/generator ant-20/ant-20e o-24 operation the “address input - nsap” box (not displayed) the “sub-address” box (nsap) this box is used to set a sub-address. Button/check box meaning radio buttons for afi 1 type of address (authority and format identifier) icd - international code de...

  • Page 43: Test Types

    Ant-20/ant-20e broadband analyzer/generator operation o-25 5 test types 5.1 overview “test types” serve to structure the measurement modes and the so-called connection modes. A “test type” comprises a measurement mode and a connection mode. The connection mode defines how the virtual atm connection ...

  • Page 44

    Broadband analyzer/generator ant-20/ant-20e o-26 operation 5.2 the “test setup” dialog: setting the test type the “test setup” dialog (see fig. 23) is used to select the appropriate test type (a) for your measurement task. Click the “configure test” button (c) to configure the test. The extended “te...

  • Page 45

    Ant-20/ant-20e broadband analyzer/generator operation o-27 the “test setup” dialog consists of the following sections: 5.3 the “atm layer qos - looped topology” test type this test type is intended for atm layer qos measurements in looped topology. This means that the transmitter and receiver are co...

  • Page 46

    Broadband analyzer/generator ant-20/ant-20e o-28 operation 5.4 the “atm layer qos (pvc) - point-to-point” test type this test type is intended for atm layer qos measurements with permanent virtual connections where channels are to be tested from end to end in both directions. This test is particular...

  • Page 47

    Ant-20/ant-20e broadband analyzer/generator operation o-29 5.5 the “atm layer qos (pvc) - looped” test type this test type is intended for atm layer qos measurements with permanent virtual connections where the virtual channels are to be looped back in the dut either in the physical layer or in the ...

  • Page 48

    Broadband analyzer/generator ant-20/ant-20e o-30 operation 5.6 the “atm layer qos (svc) - calling” test type this test type is intended for atm layer qos measurements with switched virtual connections where channels are to be tested from end to end in both directions. Two test instruments are needed...

  • Page 49

    Ant-20/ant-20e broadband analyzer/generator operation o-31 5.8 the “atm layer qos (svc) - self call” test type this test type is intended for atm layer qos measurements with switched virtual connections. It is a self call, with the connection being looped back in the dut in the atm layer. Characteri...

  • Page 50

    Broadband analyzer/generator ant-20/ant-20e o-32 operation 5.9 the “test setup ” dialog: configure test type the extended “test setup ” dialog is used to configure the test type and to match it to your measurement task. The test channels are represented here by index cards, e.G. “channel a”, “channe...

  • Page 51

    Ant-20/ant-20e broadband analyzer/generator operation o-33 the “test setup ” dialog may include the following sections: certain relationships exist between parameters which depend on the current configuration. This means that the choice of parameters will not always be the same. To preserve clarity,...

  • Page 52

    Broadband analyzer/generator ant-20/ant-20e o-34 operation the items in the list are arranged in alphabetical order of traffic type. The following traffic types are available: 5.9.2 header the “header” field is used to define the test cell header for permanent virtual connections (pvc). Generally, t...

  • Page 53

    Ant-20/ant-20e broadband analyzer/generator operation o-35 5.9.3 called party address this field is used to display and set the atm address of the called party (in “calling” mode). 5.9.4 own instrument address this field is used to display the instrument's own atm address as set in the instrument co...

  • Page 54

    Broadband analyzer/generator ant-20/ant-20e o-36 operation 5.9.5 source parameters the “source parameters” field is used to set the source parameters. These determine the load conditions for the channel (peak cell rate, mean cell rate) and the jitter and burst characteristics. When you select a test...

  • Page 55

    Ant-20/ant-20e broadband analyzer/generator operation o-37 5.9.6 multiplexer the entries made in the “multiplexer” field have the character of a preview (traffic prediction) since the generator is not yet active during the setup. This makes it possible to set up the generator exactly before starting...

  • Page 56: Defining Virtual Channels

    Broadband analyzer/generator ant-20/ant-20e o-38 operation 6 defining virtual channels vi: atm test control 6.1 overview virtual channel the term “virtual channel” is central to atm technology. A virtual channel is basically characterized by • the type of virtual connection: switched (svc) or perman...

  • Page 57

    Ant-20/ant-20e broadband analyzer/generator operation o-39 fig. O-26 the “channel editor” dialog the dialog contains the following sections: a b c section meaning header (a) channel list box 1 listing all saved virtual channels. Save 2 saves the virtual channel in the database under the current name...

  • Page 58

    Broadband analyzer/generator ant-20/ant-20e o-40 operation 6.3 parameter display and modification (index cards) 6.3.1 the “general” index card this index card defines the general parameters for the virtual channel selected in the “channel” list box. Fig. O-27 the “general” index card (channel editor...

  • Page 59

    Ant-20/ant-20e broadband analyzer/generator operation o-41 6.3.2 the “header/address” index card this index card defines the default header values or the default atm address of the selected channel, depending on whether a permanent (pvc) or a switched (svc) channel is selected: • pvc: set default he...

  • Page 60

    Broadband analyzer/generator ant-20/ant-20e o-42 operation default called party address fig. O-29 the “header/address” index card when using switched virtual circuits: default called party address the sections have the following meanings: you can only assign a channel in the “test setup” dialog if t...

  • Page 61

    Ant-20/ant-20e broadband analyzer/generator operation o-43 6.3.3 the “traffic contract” index card this index card defines the channel traffic contract parameters. The possible entries depend on the selected traffic type. The index card contains the following sections: fig. O-30 the “traffic contrac...

  • Page 62

    Broadband analyzer/generator ant-20/ant-20e o-44 operation 6.3.4 the “traffic contract” index card (continued) this index card defines the extended part of the contract parameters for the channel. The possible entries depend on the selected connection type (pvc, svc). Fig. O-31 the “traffic contract...

  • Page 63

    Ant-20/ant-20e broadband analyzer/generator operation o-45 6.3.5 the “traffic source” index card this index card is used to set the default source parameters for the channel. Fig. O-32 the “traffic source” index card (channel editor) the index card contains the following sections: : a b section mean...

  • Page 64

    Broadband analyzer/generator ant-20/ant-20e o-46 operation notes:.

  • Page 65: Application Guide

    Ant-20/ant-20e broadband analyzer/generator application guide a-1 application guide 1 the application manager starting point the instrument has been started. After booting up, the “application manager” appears on the screen (“ant20 - ” window). The “application title” window is the central control f...

  • Page 66

    Broadband analyzer/generator ant-20/ant-20e a-2 application guide fig. A-3 “add & remove instruments” dialog after adding the desired virtual instruments (preselection: atm advanced) 1.2 starting and stopping the measurement ✓ before starting the measurement, the traffic button in the application ma...

  • Page 67

    Ant-20/ant-20e broadband analyzer/generator application guide a-3 2 atm layer quality of service measurements (svc) 2.1 overview: basic operating sequence the following section lists all the necessary steps, from loading the application, basic configuration settings via defining the test traffic to ...

  • Page 68

    Broadband analyzer/generator ant-20/ant-20e a-4 application guide 2.2 test setup and description chapter 2 takes you step by step through the procedure for atm layer qos tests. The procedure is based on a configuration with terminal emulation and signaling, to allow switched virtual connections (svc...

  • Page 69

    Ant-20/ant-20e broadband analyzer/generator application guide a-5 2.3.1 configuring the instrument: “atm test control” vi ⇒ click on the icon button of the “atm test control” vi in the minibar (application manager) (see fig. A-5). The “atm test control” main window appears on top (see fig. A-6). I f...

  • Page 70

    Broadband analyzer/generator ant-20/ant-20e a-6 application guide a) to set the topology ⇒ select the “emulate” option in the “port configuration” field to allow activation of signaling emulation. “emulate” can only be selected if the physical layer is set to the same bit rate and mapping for both g...

  • Page 71

    Ant-20/ant-20e broadband analyzer/generator application guide a-7 1. Click the toolbar icon or the “edit - signal structure...” menu command the “edit signal structure” dialog window of the “signal structure” vi opens. The signal structure is set column by column using the corresponding buttons. Fig...

  • Page 72

    Broadband analyzer/generator ant-20/ant-20e a-8 application guide option “change own address” 5. Click the “change address” button if you want to alter the address of the instrument. The “address input” dialog window opens. Fig. A-12 the “address input” dialog 6. Select the address format, e.G. Nati...

  • Page 73

    Ant-20/ant-20e broadband analyzer/generator application guide a-9 2.3.2 selecting the test type: “atm test control” vi the “test types” available for selection are used to structure the measurement and connection types or so-called “connection modes”. They are arranged according to protocol layers, ...

  • Page 74

    Broadband analyzer/generator ant-20/ant-20e a-10 application guide 2.3.3 configuring the test type: “atm test control” vi to configure the test type required for your measurement task ✓ the “test setup” dialog window is open. ⇒ click the “configure test” button. The “test setup ” dialog window opens...

  • Page 75

    Ant-20/ant-20e broadband analyzer/generator application guide a-11 b) entering the address of the called instrument ✓ the “test - setup ” dialog is open. ✓ the instrument is configured for svcs. 1. Click the “change address” button. The “address input” dialog window opens. Fig. A-17 the “address inp...

  • Page 76

    Broadband analyzer/generator ant-20/ant-20e a-12 application guide removing a test channel, if necessary 1. Click on the index card of the channel that you want to remove, e.G. “channel b”. The index card showing the current channel and traffic type will move to the front. 2. Click on “” in the “sel...

  • Page 77

    Ant-20/ant-20e broadband analyzer/generator application guide a-13 2.5 editing test parameters “on-line”: “atm test control” vi opening the “online control” dialog window ✓ the “atm test control” main window is open. ⇒ click the above icon button of the toolbar. – or – ⇒ select the “test - online co...

  • Page 78

    Broadband analyzer/generator ant-20/ant-20e a-14 application guide 2.6 inserting errors: “atm test control” vi opening the “error insertion” dialog window ✓ the “atm test control” main window is open. ⇒ click the above icon button of the toolbar. – or – ⇒ select the “test - error insertion” menu com...

  • Page 79

    Ant-20/ant-20e broadband analyzer/generator application guide a-15 2.7 displaying the results: “atm test results” vi fig. A-22 application manager ⇒ click the icon button for the “atm test results” vi in the minibar. The “test results” window is displayed on top. After the vi has booted up, the work...

  • Page 80

    Broadband analyzer/generator ant-20/ant-20e a-16 application guide the “signaling analysis” is on top when the configuration selected is for switched virtual connections (svc). This allows you to follow the signaling sequence right from when the call is being set up. The window is not displayed for ...

  • Page 81

    Ant-20/ant-20e broadband analyzer/generator application guide a-17 channel status the “channel status” field indicates the circuit status of the test channels: signaling events this display field indicates the progress of the signaling. The signaling events are shown consecutively in separate lines,...

  • Page 82

    Broadband analyzer/generator ant-20/ant-20e a-18 application guide 2.7.3 the “quality of service” window the “quality of service” results window shows the itu-t o.191 qos performance parameters. The index cards of the window show detailed, channel-specific results. The right-hand section of the wind...

  • Page 83

    Ant-20/ant-20e broadband analyzer/generator application guide a-19 delay related parameters the “delay related parameters” display field shows the performance parameters affecting the cell transfer delay for the selected test channel. The overall results are shown under “total”. The intermediate res...

  • Page 84

    Broadband analyzer/generator ant-20/ant-20e a-20 application guide the alarm duration is shown separately for each channel on the corresponding index cards. • the “delay related parameters” are only displayed if one of the following test types was selected in the “atm test control” vi: – atm layer q...

  • Page 85

    Ant-20/ant-20e broadband analyzer/generator application guide a-21 hec error counts the “hec error counts” display area shows the results of the receiver header error check. The values are cumulative for the entire measurement interval. Defect seconds the “defect seconds” display field registers the...

  • Page 86

    Broadband analyzer/generator ant-20/ant-20e a-22 application guide 3 detecting and analyzing atm channels (channel explorer) 3.1 overview: basic operating sequence the following section lists all the necessary steps, from starting the application and selecting the scan type through to the scan itsel...

  • Page 87

    Ant-20/ant-20e broadband analyzer/generator application guide a-23 3.2 test setup and description chapter 3 describes the procedure for checking traffic and locating faults using the “channel explorer”. This tool is used to interactively observe the events on an atm link and to analyze them. The var...

  • Page 88

    Broadband analyzer/generator ant-20/ant-20e a-24 application guide 3.4 measurement 3.4.1 “activity” scan: detect and display active atm channels “scan - activity” looks for active channels. The instrument detects every active channel and enters it in to the results list. The “activity” scan type is ...

  • Page 89

    Ant-20/ant-20e broadband analyzer/generator application guide a-25 tip: to stop the scan click the icon button of the toolbar again or click “start” in the “scan” menu again. A scan can only be started or a test traffic can be generated, when no other measurements that are started from the applicati...

  • Page 90

    Broadband analyzer/generator ant-20/ant-20e a-26 application guide to stop the analysis ⇒ click the “cancel” button (e.G. If “unchecked” entries appear in the list). – or – the analysis stops automatically when all channels are analyzed again. 3.4.3 displaying the aal type distribution determine and...

  • Page 91

    Ant-20/ant-20e broadband analyzer/generator application guide a-27 to stop the analysis ⇒ click the “cancel” button. – or – the analysis stops automatically when the analysis is complete (“unchecked” = 0%). When you perform an “aal type distribution” analysis, an “aal type” analysis is automatically...

  • Page 92

    Broadband analyzer/generator ant-20/ant-20e a-28 application guide to select “trouble” scan ⇒ click the item “trouble” in the “scan” menu. The selected function is marked with a dot. Fig. A-33 the “scan” menu with selected “trouble” scan type and corresponding results list to start the scan ⇒ click ...

  • Page 93

    Ant-20/ant-20e broadband analyzer/generator application guide a-29 results lists each line corresponds to a channel exhibiting a rdi and/or an ais alarm. A current alarm is indicated in upper-case letters (e.G. Ais).Previous alarms that are no longer active are indicated in lower-case letters (e.G. ...

  • Page 94

    Broadband analyzer/generator ant-20/ant-20e a-30 application guide 3.6 sorting channels to sort the channels the icon buttons shown above (toolbar) are used to sort the channels, i.E. To determine the order in which they are displayed in the result window. Each button corresponds to a sort criterion...

  • Page 95: Technical Background

    Ant-20/ant-20e broadband analyzer/generator technical background tb-1 technical background 1 atm traffic generation and multiplexing vi: atm test control 1.1 overview atm test equipment takes on an important role in generating traffic profiles and multiplexing several virtual channels due to the spe...

  • Page 96

    Broadband analyzer/generator ant-20/ant-20e tb-2 technical background 1.2 generator principle the traffic generator of the ant-20 or of the broadband analyzer/generator simultaneously generates up to four test channels (software version 6.0). The generator produces quasi- statistical traffic accordi...

  • Page 97

    Ant-20/ant-20e broadband analyzer/generator technical background tb-3 1.3.1 “constant bit rate” source model the “constant bit rate” source model generates test cells at equidistant intervals in time, with fill cells inserted in the spaces (see fig. Tb-2). The desired traffic profile can be affected...

  • Page 98

    Broadband analyzer/generator ant-20/ant-20e tb-4 technical background 1.3.2 “on-off” source model the “on-off” source model generates test cells in bursts. Fill cells are inserted in the gaps (see fig. Tb-3). The desired traffic profile can be influenced using the following parameters: • peak cell r...

  • Page 99

    Ant-20/ant-20e broadband analyzer/generator technical background tb-5 1.4 traffic control and multiplexing method as well as being able to set the source parameters “off-line”, i.E. Before starting the measurement, the “atm test control” vi also allows you to change all the relevant source parameter...

  • Page 100

    Broadband analyzer/generator ant-20/ant-20e tb-6 technical background fig. Tb-4 “test setup” and “test online control” dialog windows with index cards and “multiplexer” section to make it easier to see the complex procedures during multiplex formation, an overview of the status of each channel is gi...

  • Page 101

    Ant-20/ant-20e broadband analyzer/generator technical background tb-7 multiplexer results for permanent virtual connections (pvc) multiplexer results for switched virtual connections (svcs) it is not possible to make a precise prediction of the generated traffic profiles for switched virtual connect...

  • Page 102

    Broadband analyzer/generator ant-20/ant-20e tb-8 technical background fig. Tb-5 “test setup” dialog for svc connections with multiplexer section (a) 1.5 traffic shaper if the “shape to contract” option is activated, the instrument shapes the set traffic profile. Shaping occurs whenever the traffic c...

  • Page 103

    Ant-20/ant-20e broadband analyzer/generator technical background tb-9 2 testing switched virtual circuits (svcs) vi: atm test control and atm test results 2.1 general features of the signaling (software version 6.5) the signaling functions of a terminal on the user-network interface (uni) are emulat...

  • Page 104

    Broadband analyzer/generator ant-20/ant-20e tb-10 technical background • a connection is accepted if: – the called party address is the same as the instrument address – the setup message has the format given above – the stated contract parameters are plausible and the instrument is capable of genera...

  • Page 105

    Ant-20/ant-20e broadband analyzer/generator technical background tb-11 features • measurement of the qos parameters starts (“atm test results” vi) as soon as a connection has been set up. • if test traffic has been enabled, it will be generated as soon as a connection is set up. • the contents of th...

  • Page 106

    Broadband analyzer/generator ant-20/ant-20e tb-12 technical background time sequence after the measurement is started (application manager) the following automatic sequence begins. The sequence is split into 4 phases: fig. Tb-7 time sequence at atm traffic generation, “calling” mode (only one channe...

  • Page 107

    Ant-20/ant-20e broadband analyzer/generator technical background tb-13 2.5 “called” mode fig. Tb-9 configuration diagram (vi “atm test control”) features • the “called” instrument is ready to receive calls during the measurement interval. Calls occurring outside the measurement interval will not be ...

  • Page 108

    Broadband analyzer/generator ant-20/ant-20e tb-14 technical background test type: “atm layer qos (svc) - called” settings basically the same as for “calling” mode (see sec. 2.4) but the test types in “configure instrument” are reversed. Time sequence after the measurement is started (application man...

  • Page 109

    Ant-20/ant-20e broadband analyzer/generator technical background tb-15 2.6 “self call” mode fig. Tb-11 configuration diagram (vi “atm test control”) features “self call” mode is a combination of “calling” (see sec. 2.4) and “called” modes (see sec. 2.5). In the forward direction, the self-call has t...

  • Page 110

    Broadband analyzer/generator ant-20/ant-20e tb-16 technical background notes:.

  • Page 111: Generator

    Ant-20/ant-20e broadband analyzer/generator specifications “atm layer” s-1 specifications “atm layer” 1 generator 1.1 scrambling the cell payload is scrambled as per itu-t recommendation i.432 (x 43 + 1). The scrambler can be disabled. 1.2 fill cells the fill cell type is selectable. Idle or unassig...

  • Page 112

    Broadband analyzer/generator ant-20/ant-20e s-2 specifications “atm layer” 1.4 general functions 1.4.1 error insertion (anomalies) the following anomalies can be inserted in addition to the errors inserted in the physical layer. These anomalies are not dependent on the active measurement type, they ...

  • Page 113

    Ant-20/ant-20e broadband analyzer/generator specifications “atm layer” s-3 1.5 functions for atm layer quality of service measurements 1.5.1 general 1.5.2 error insertion (anomalies) the following anomalies can be inserted selectively into each of the 4 test channels. All anomalies are inserted as a...

  • Page 114

    Broadband analyzer/generator ant-20/ant-20e s-4 specifications “atm layer” 1.6 source models 1.6.1 constant bit rate model a cell stream with nominally constant cell spacing is generated. 1.6.2 “on-off” model a burst-type cell stream with on/off character is generated. Parameters . . . . . . . . . ....

  • Page 115

    Ant-20/ant-20e broadband analyzer/generator specifications “atm layer” s-5 1.7 traffic shaper 1.7.1 traffic shaper for cbr, ubr and dbr traffic contracts mean cell rate resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 cell/s maximum burst...

  • Page 116

    Broadband analyzer/generator ant-20/ant-20e s-6 specifications “atm layer” 1.7.2 traffic shaper for vbr and sbr traffic contracts algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Compatible with dual leaky bucket parameters . . . . . . . . . . . . . . . . . ....

  • Page 117: Receiver

    Ant-20/ant-20e broadband analyzer/generator specifications “atm layer” s-7 2 receiver 2.1 descrambling descrambling as per itu-t recommendation i.432 (x 43 + 1). The descrambler can be disabled. 2.2 general functions 2.2.1 error measurements (anomalies) the following anomalies are evaluated and disp...

  • Page 118

    Broadband analyzer/generator ant-20/ant-20e s-8 specifications “atm layer” 2.3 atm layer quality of service measurements 2.3.1 general features 2.3.2 error related parameters measurement algorithm conforms to itu-t recommendation o.191, issue of 9th january 1997. The following parameters are measure...

  • Page 119

    Ant-20/ant-20e broadband analyzer/generator specifications “atm layer” s-9 2.3.4 alarm detection (defects) 2.3.5 other parameters the following parameters are indicated as a count of defect seconds 1 . The “loss of performance assessment capability” state is detected if it is no longer possible to m...

  • Page 120

    Broadband analyzer/generator ant-20/ant-20e s-10 specifications “atm layer” 2.4 channel explorer 2.4.1 activity scan automatic detection of active virtual channels. Channels are distinguished by vci and vpi. Uni and nni interface types can be selected. The following parameters are measured for each ...

  • Page 121

    Ant-20/ant-20e broadband analyzer/generator specifications “atm layer” s-11 2.4.3 aal analysis automatic detection of aal type for all channels detected during an activity scan. It is also possible to display the aal type distribution graphically (pie chart). The proportion of each aal type is given...

  • Page 122: Signaling

    Broadband analyzer/generator ant-20/ant-20e s-12 specifications “atm layer” 3 signaling the instrument simulates the signaling functions of a terminal on the user-network interface (uni). Up to 4 connections can be switched simultaneously. “channel associated signaling” can be selected as an option....

  • Page 123: Index

    Ant-20/ant-20e broadband analyzer/generator i index symbols o-32 numerical 2-point cell delay variation a-19 2-pt. Cdvpp a-19 a aal type o-11, o-14, o-38 aal type distribution o-14 activity (channel performance) a-19 activity scan o-11 address o-21, a-11 address input o-22, a-8, a-11 afi (address ty...

  • Page 124

    Broadband analyzer/generator ant-20/ant-20e ii e e.191 (address type) o-24 edit signal structure a-7 emulate topology o-17, o-21, a-6 end-to-end measurement a-4 error insertion o-6, a-14 error management o-15 error related parameters a-18 esi (address type) o-24 f f4 (oam flow) o-15 f5 (oam flow) o-...

  • Page 125

    Ant-20/ant-20e broadband analyzer/generator iii scan start/stop o-13 scan type o-11, o-12 secb a-18 sel (address type) o-24 select channel o-33, a-10 selection (virtual channel type) o-33 self call o-25, o-31 set default o-36 set maximum o-36 shape to contract o-36 signal structure o-1, o-7, o-11, o...

  • Page 126

    Broadband analyzer/generator ant-20/ant-20e iv notes:.