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DOCSIS 3.1 Codeword Errors (CWE)

THINGS TO CHECK:

To make sure there are

no uncorrectable CWE



Codeword (CW):

a data bucket within a DOCSIS packet



CW Error (CWE)

: a byte-level data packet corruption resulting from

QAM symbol displacement across constellation decision boundaries



Correctable vs. Uncorrectable determined by number of corrupted
symbols relative to CMTS forward error correction level settings



If you are having CWEs, you may be losing data



Uncorrectable CWEs

indicate dropped packets (think post-FEC

BER)



Retransmit is required for recovery



There is no recovery from dropped packets for real-time apps like
VoIP!



Correctable CWEs

are an early warning that the uncorrectable

threshold may be near! (think pre-FEC BER)

Содержание OneExpert CATV 630

Страница 1: ...Extended Quick Start Guide v4 August 2019 OneExpert CATV 630 ...

Страница 2: ...zation Firmware Upgrades Synchronization with StrataSync Ethernet Testing CATV Measurements QuickCheck Spectrum TDR HL Leakage Option and Transmitter Ingress Scan Channel Check DOCSIS Check OneCHECK D3 1 Measurements CATV NETWORK Measurements Configure Screens QuickCheck EXPERT Channel EXPERT DOCSIS EXPERT Ingress EXPERT Return Signal Generator RSG w Loopback Forward and Return Sweep Sweepless Swe...

Страница 3: ...w viavisolutions com en us services and support support center customer care customer portal login RMA Request Form http www viavisolutions com en us services and support return material authorization rma request Viavi Technical Support Will assist you in using configuring products or address issues regarding product performance T 1 844 GO VIAVI 1 844 468 4284 E catvsupport viavisolutions com For ...

Страница 4: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 4 4 2018 VIAVI Solutions Inc viavisolutions com ONX CATV Overview ...

Страница 5: ...ial and Proprietary Information 5 ONX Control keys Network Indicator LEDs High Sensitivity Touch Screen Shortcut Buttons Short Cut Hard keys Functions keys Navigation Directional Buttons Back Home Screen and Utility Buttons Power On Off Button ...

Страница 6: ... and Proprietary Information 6 ONX Interfaces Port 2 RF Ingress Port Connect to upstream from house for Ingress Scan Port 1 RF US DS Analysis DOCSIS QAM D Ring Dual 10 100 1000 RJ45 Ports Dual USB 2 0 Ports Battery Charger Port under flap D Ring ...

Страница 7: ...ted Solid green indicates that charging is complete Slow flashing red indicates that the battery charge is critically low and less than 10 Fast flashing red indicates that the charging was suspended due to a fault and user intervention is necessary for example an incorrect charger is attached Solid red indicates that the charging was suspended due to overheating The unit can continue to run and no...

Страница 8: ...mber indicates a timeout the unit was unable to acquire an IP address If the LED is not illuminated the network is not active either the unit is not connected or it is logged off Batt A multi color LED that indicates the battery status Solid green indicates that either the battery charge is higher than 30 or that an external source is powering the unit Solid red indicates that the battery charge i...

Страница 9: ...the current menu the screen you were viewing when you launched the tray menu NETWORK Enables or disables the home Ethernet network BLUETOOTH Enables or disables Bluetooth VOLUME Control the device volume HELP Provides TAC phone numbers USING THE TRAY MENU The tray menu allows access to commonly used functions It can be accessed either by pressing the Tray system key or by swiping downward from the...

Страница 10: ...ction and then drag it to the bottom of the screen to create a shortcut You can create up to four shortcuts To remove the shortcut drag it off the shortcut bar REARRANGING ICONS You can rearrange icons within a menu for tests or functions you use frequently To rearrange icons inside a menu touch and hold the icon and then drag it to the new location COLLAPSIBLE MENUS Each main item is a collapsibl...

Страница 11: ...n be reached by selecting the Home Screen button above the On Off Button Back Button also returns the user to the Home Screen Each Menu option is labeled and can be opened or collapsed by the triangle buttons to the right Shortcuts are located across the bottom and can be customized by selecting an icon and dragging it to the shortcut bar ...

Страница 12: ...idential and Proprietary Information 12 Navigate from the Home Screen down to the bottom using the D PAD to swiping with a finger Select System Settings From System Settings the user can set up the meter a variety of ways System Settings ...

Страница 13: ...onfidential and Proprietary Information 13 Select Date and Time and make sure that Time Synchronization is set to StrataSync This is important because test data will need to be time stamped with the correct date and time Date and Time ...

Страница 14: ...ation 14 Select Screen and Power Management to better conserve the ONX battery life Recommended values are shown to the right However if Power off Delay needs to be set higher in order to accommodate technician s pace select appropriate time Screen and Power Management ...

Страница 15: ...ct Home Screen to customize which measurement bundles are available on the Home Screen of the ONX630 For the Network Technician CATV CATV Network and Ethernet Test are the only truly applicable test bundles Technicians are invited to customized as needed Customizing the Home Screen ...

Страница 16: ...ary Information 16 Select Hardware Software Revisions to verify the most up to date Firmware is installed Additionally ONX630 Serial Number listed as Unit ID and CM MAC Addresses used in provisioning of the onboard Cable Modem Hardware and Software Revisions ...

Страница 17: ...s Inc Viavi Confidential and Proprietary Information 17 Navigate from the Home Screen to CATV Settings Here the tech can validate IPv4 or IPv6 Tilt Sweep Diplex Digital Measurement Channel Plan Build Settings CATV Settings ...

Страница 18: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 18 Advanced CATV Settings ...

Страница 19: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 19 Advanced CATV Settings ...

Страница 20: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 20 Advanced CATV Settings ...

Страница 21: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 21 Advanced CATV Settings ...

Страница 22: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 22 22 2018 VIAVI Solutions Inc viavisolutions com ONX CATV SW Upgrade and Data Synchronization ...

Страница 23: ...latest production software release available through StrataSync or your Viavi representative New SW Version offer substantial operational improvements and enhancements over earlier software releases including the version that shipped with the units initially The software will be deployed to the units by the StrataSync Administrator but each unit needs to be configured to connect with StrataSync Fo...

Страница 24: ...ocess Click here to download the newest firmware Copy the downloaded file ONXCBL xxx xxx xxx oxu to the root directory of a USB thumb drive Press Cancel once the download has completed and you have placed the file on the USB thumb drive Note Firmware must be downloaded from StrataSync first ...

Страница 25: ...f the ONX Then start System Settings 2 Select USB Software Update 3 At the popup select the firmware image you wish to select for upgrade 4 Press Update to start the upgrade 5 Press Update to confirm and start the upgrade The meter will power off when the update is complete Note Make sure you do not have an Ethernet cable plugged in when upgrading by USB ...

Страница 26: ...a RF or WiFi but this is ONLY for sending test files receiving configuration information like limit plans etc not for SW FW upgrades 1 Connect an Ethernet cable from an active internet connection Cable Modem or router gateway to Port 1 on the ONX 2 From the ONX home screen navigate to System Menu and select Network Verify the ONX has a valid IP address ...

Страница 27: ...figure and join a WiFi network prior to performing sync You can synchronize to StrataSync via WiFi but this is ONLY for sending test files receiving configuration information like limit plans etc 1 Connect with WiFi from an active internet connection Cable Modem or router gateway 2 From the ONX home screen navigate to System Network WiFi Verify the ONX has a valid IP address ...

Страница 28: ...nd Proprietary Information 28 StrataSync Synchronization RF 1 Make sure that CM MAC 1 is provisioned in the billing system 2 Select the CONNECTION APP from CATV 3 Once CONNECTION STATUS reports a GREN Check mark and INTERFACE RF IP ADDRESS is shown ...

Страница 29: ...rmation 29 StrataSync Synchronization ETHERNET WIFI and RF 1 After IP Address verification navigate to the System Menu and select StrataSync 2 StrataSync Account ID xxxxxxxxx Server Address stratasync jdsu com stratasync viavisolutions com also works Server Port 443 ...

Страница 30: ...tions Inc Viavi Confidential and Proprietary Information 30 StrataSync Synchronization Mobile Tech App Download VIAVI MOBILE TECH v2 app On ONX620 or 630 enable BLUETOOTH by going to SYSTEM SETTINGS BLUETOOTH SETTINGS ...

Страница 31: ...ions Inc Viavi Confidential and Proprietary Information 31 StrataSync Synchronization Mobile Tech App Select SCAN FOR DEVICES select mobile phone and PAIR mobile phone to ONX Accept the PAIR request on the mobile phone ...

Страница 32: ...Viavi Solutions Inc Viavi Confidential and Proprietary Information 32 StrataSync Synchronization Mobile Tech App Connect to ONX now identified in BLUETOOTH SETTINGS on mobile phone Open VIAVI Mobile Tech app ...

Страница 33: ...i Confidential and Proprietary Information 33 StrataSync Synchronization Mobile Tech App LOGIN using STRATASYNC LOGIN and PASSWORD credentials If user doesn t have login credentials please reach out to local STRATASYNC ADMINISTRATOR ...

Страница 34: ... Viavi Solutions Inc Viavi Confidential and Proprietary Information 34 StrataSync Synchronization Mobile Tech App If ONX is not connected choose CONNECT Select the in the upper right hand corner for SETTINGS ...

Страница 35: ...onfidential and Proprietary Information 35 StrataSync Synchronization Mobile Tech App In SETTINGS users can select the number of minutes between automatic SYNCRONIZATION of test data Return to the main screen and select INSTRUMENT SYNC ...

Страница 36: ... saved on ONX the test data will appear in the SYNC folder and will automatically sync to STRATASYNC at the chosen time interval The sync from MOBILE TECH to STRATASYNC will occur regardless of whether the tech views this screen Test data will appear in STRATASYNC after a few minutes 3 5 minutes based on the number of files ...

Страница 37: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 37 37 2018 VIAVI Solutions Inc viavisolutions com ONX CATV Engineering Mode ...

Страница 38: ...ST 1 The unit is switch off 2 Press and hold the Tray key 3 Press shortly the Power on key 4 Hold the Tray key until the for top led are orange takes about 3sec 5 Release the Tray key 6 Go in CATV setting and select Engineering Utilities 7 Select Built in Self Test and Start BIST 8 Go to File Browser and copy the custBist zip file to a plugged USB memory stick ...

Страница 39: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 39 39 2018 VIAVI Solutions Inc viavisolutions com Ethernet Testing KF1 ...

Страница 40: ...Slide 39 KF1 NEED UPDATE Kyle Feig 8 9 2018 ...

Страница 41: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 40 Ethernet Tests and Settings From Home Screen select Ethernet Once Network Up is indicated with green select Test and Settings ...

Страница 42: ...ernet Speed Check CATV Ethernet s throughput IP Address URL is configured in the mode under Settings Default value are for both Downstream Upstream the same http CATVSpeedTest viavisolutions com bigfile zip If the upstream URL changes the file name need to be the same bigfile zip ...

Страница 43: ...Select Profile or create a new one The test will start automatically after Profile is selected Stop Test and choose Server Settings on the bottom and enter the Server IP address and then resume Only applicable for first test setup Fallback Server is for second TrueSpeed VNF and can help alleviate queue ...

Страница 44: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 43 ETHERNET TrueSpeed Results After test completes Results are displayed as either the Speedometer or a simple list ...

Страница 45: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 44 44 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements QuickCheck Ingress Scan Spectrum TDR HL Leakage OneCHECK ...

Страница 46: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 45 45 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements QuickCHECK ...

Страница 47: ... to see a small number of manually added channels and quickly determine if signal is present as well as SYSTEM TILT Enter WORK ORDER ID and choose demarcation point and press Start Navigate the Results Screen shown to the right using touchscreen or Directional Buttons Add remove frequency and type of carrier ...

Страница 48: ...i Confidential and Proprietary Information 47 QuickCHECK Results and Settings Select REFERENCE NOW for auto reference based on level and AUTO REFERENCE to rely on AGC for adjustment when removing or plugging in test jumper to power ...

Страница 49: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 48 48 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements Spectrum ...

Страница 50: ...tions Inc Viavi Confidential and Proprietary Information 49 Spectrum Setup Enter Work Order ID and choose proper demarcation point Navigate the Results Screen shown to the right using touchscreen or Directional Buttons ...

Страница 51: ...vigate the Results Screen shown to the right using touchscreen pinch and pull like tablet or smart phone or Directional Buttons Choose Display to change to landscape view or manually change graph division size span and toggle Live Max and Min traces Choose Settings to change RBW and AGC settings ...

Страница 52: ...i Solutions Inc Viavi Confidential and Proprietary Information 51 Spectrum Results Drag or use Directional buttons to move marker Double tap on the marker to display Delta between second marker which will appear ...

Страница 53: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 52 52 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements TDR ...

Страница 54: ...nc Viavi Confidential and Proprietary Information 53 TDR TDR function will allow users to set the Velocity of Propagation VoP in various cable types Connect to PORT 2 to take TDR traces selecting the proper demarcation point ...

Страница 55: ...Proprietary Information 54 HOME TDR A TDR measures reflections based on time Therefore the correct Velocity of Propagation for the cable to be tested must be chosen first VoP is essential for accurate distance measurements TDR Setup VoP Configuration ...

Страница 56: ...and CABLE LENGTH DROP CHECK and CABLE LENGTH tabs are identical tests The DROP CHECK simply reminds the user to disconnect the other end of the drop Displayed is a 57 cable with a splice The splice is a small reflection at 22 while the open end of the cable is a larger reflection at 57 Splice ...

Страница 57: ... and cable lengths Example to the left still shows the splice at 22 with a splitter at 57 and 2 cables connected to the splitter with open ends HOME TDR displays all 4 events Markers can be added for relative distances under from the display button Horizontal Zoom and Pan functions are at the bottom of the display Splice Splitter Open Open ...

Страница 58: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 57 57 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements HL Leakage with Transmitter ...

Страница 59: ...around the home or business Required Equipment Includes ONX 620 or ONX 630 with DOCSIS 3 1 hardware HL Leakage software option must be present on the ONX HL Leakage Transmitter 60dBmv output RED LIGHT and 40dBmv output GREEN LIGHT HL Leakage Antennas 4a Dual band rubber duck antenna 4b Near Field Probe antenna Used for detecting leaks when attached to ONX Tuned for 138MHz and 757 5MHz HL Tx Connec...

Страница 60: ...e shown over time on the HL LEAKAGE display while also emitting a siren that will signal proximity to leak MUTE or UNMUTE and VOLUME controls as well as PAUSE and STOP RETEST will be displayed across the bottom Since HL Leakage is LIVE select STOP before adjusting the SQUELCH limit Test will run for 5 mins before restarting ...

Страница 61: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 60 60 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements Ingress Scan ...

Страница 62: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 61 Ingress Scan ...

Страница 63: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 62 62 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements Channel CHECK KF2 ...

Страница 64: ...Slide 62 KF2 UPODATE NEEDED Kyle Feig 8 9 2018 ...

Страница 65: ...ial and Proprietary Information 63 Channel CHECK DASHBOARD Dashboard gives an overall status on the test Because Channel Check is LIVE measurements will continue to update once the dashboard Max and Mins are displayed for MER dB and Level dBmV ...

Страница 66: ...d in RED and all measurements passing the thresholds represented in GREEN Users can navigate via touchscreen D Pad or Channel Search as long as CHANNEL VIEW is selected in BLUE Users can select their FAVORITES by pressing on the STAR until it is highlighted in Gold SPECTRUM IUC Ingress Under the Carrier allows the user to view ingress under the selected and adjacent QAM carriers Examples below are...

Страница 67: ...MER OVER TIME BER OVER TIME on all channels in the background and DQI OVER TIME measured on the channel selected in CHANNEL VIEW These measurements will continue until and be displayed over the last 5 minutes until the measurement is stopped To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected in BLUE ...

Страница 68: ...ific carrier selected in CHANNEL VIEW and will continue until stopped TILT of the Fullscan TILT channels can be toggled in CATV SETTINGS SMARTSCAN offers a raw frequency domain response of the Fullscan and measures against a defined thresholds for deviation and tilt To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected in BLUE ...

Страница 69: ...olutions Inc Viavi Confidential and Proprietary Information 67 Channel CHECK FAVORITES FAVORITES is a user defined MINISCAN Select favorites channels by highlighting the Gold Star on desired channels in CHANNEL VIEW ...

Страница 70: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 68 68 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements DOCSIS CHECK KF2 ...

Страница 71: ...Slide 68 KF2 UPODATE NEEDED Kyle Feig 8 9 2018 ...

Страница 72: ...D Dashboard gives an overall status on the test Because DOCSIS CHECK is LIVE measurements will continue to update once the dashboard indicates 100 Downstream measurements displayed include Max and Mins for MER dB and Level dBmV and MAX Rx Upstream measurements displayed include MAX Tx and MAX ICFR ...

Страница 73: ...STREAM DOWNSTREAM allows the user to view the DOWNSTREAM DOCSIS CHANNELS with any measurements failing the threshold represented in RED and all measurements passing the thresholds represented in GREEN Users can navigate via touchscreen D Pad or Channel Search as long as CHANNEL VIEW is selected ...

Страница 74: ...ion 71 DOCSIS CHECK OVER TIME MEASUREMENTS Level OVER TIME MER OVER TIME BER OVER TIME and DQI OVER TIME measure the channel that is selected in CHANNEL VIEW and will continue until stopped To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected ...

Страница 75: ... verification of the number of upstream carriers the Upstream Transmit Level TX and In Channel Frequency Response ICFR TRANSMIT OVER TIME corresponds to the locked upstream carrier highlighted in blue to the left To shift upstream carrier select a different one from the UPSTREAM window D PAD or TOUCH to toggle and the TRANSMIT OVER TIME will update ...

Страница 76: ...ed carrier To toggle scroll to UPSTREAM and choose a different carrier UPSTREAM ICFR and UPSTREAM EQ ANALYSIS will update UPSTREAM EQ ANALYSIS displays the equalizer graph for 16 QAM and 64 QAM upstream carriers By highlighting a specific tap that will indicate the distance to a reflection point in the upstream This is usually the distance from an amplifier to a reflection caused by an impedance m...

Страница 77: ... SERVICE PLAN The throughput test sends a file upstream to a server The server then sends the file back to the meter Since the file size is known and the time it takes to download the file is known the meter can then calculate the downstream speed The same is done for the upstream The PING TRACEROUTE function can be configured to send configurable ping packets to a destination A TRACEROUTE test ca...

Страница 78: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 75 75 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements OneCHECK KF2 ...

Страница 79: ...Slide 75 KF2 UPODATE NEEDED Kyle Feig 8 9 2018 ...

Страница 80: ...dential and Proprietary Information 76 OneCHECK SETUP Users should choose the correct demarcation point This will guide the PASS FAIL criteria of the measurements Users choose or enter a NEW WORK ORDER ID at the beginning of every new job ...

Страница 81: ...onfidential and Proprietary Information 77 OneCHECK CONFIGURE User can verify that configurations are correct and up to date by selecting VIEW STRASYNC CONFIGURATION and verifying most recent config files Select START to begin the test ...

Страница 82: ...n Expert OneCHECK is a snap shot so measurements will not fluctuate like they will in CHANNEL CHECK or DOCSIS CHECK Max and Mins are displayed for MER dB and Level dBmV Users can choose RETEST ALL to restart the whole test or chose RETEST and chose the appropriate category to better determine if a failure was intermittent Users can SAVE from this screen all files saved will have the WORK ORDER ID ...

Страница 83: ... Information 79 OneCHECK RESULTS Dashboard Users can double tap each of the 4 measurements categories to access additional information and deeper analysis Users can also select the TROUBLESHOOT button to switch to LIVE INGRESS SCAN CHANNEL CHECK and DOCSIS CHECK ...

Страница 84: ...NNEL VIEW allows the user to view the Fullscan with any measurements failing the threshold represented in RED and all measurements passing the thresholds represented in GREEN Users can navigate via touchscreen D Pad or Channel Search Users can select their FAVORITES by pressing on the STAR until it is highlighted in Gold ...

Страница 85: ...IEW provides the maximum dB Delta between digital carriers and the maximum Video Delta between analog carriers To rapidly change channels use Channel Search FAVORITES is a user defined Miniscan FAVORITES can be configured by pressing on the given channel until a gold star is highlighted Channels will not populate this measurements window ...

Страница 86: ...y Information 82 OneCHECK Downstream Details TILT and SMARTSCAN TILT of the Fullscan TILT channels can be toggled in CATV SETTINGS SMARTSCAN offers a raw frequency domain response of the Fullscan and measures against a defined thresholds for deviation and tilt ...

Страница 87: ...DM carriers will appear with more granularity because of the measurement of all the subcarriers BER plots each digital carrier against its BER measurements with the maximum of 1 0E 9 available to the user in settings Default is 1 0E 8 OFF AIR INGRESS can be configured in STRATASYNC and is a measurement of the noise floor at the defined frequencies This measurement is specifically focused on LTE in...

Страница 88: ...RT SESSION EXPERT seeks to educate the user about the next logical demarcation point where network impairments may be located It also offers suggestions based on the observed impairments INGRESS overlays comparisons of Ingress Scans between the TAP and GB help highlight where ingress is getting in ...

Страница 89: ...omatically analyze the Drop This helps the user identify if there is a problem in the Drop between the TAP and Ground Block Additionally the user can switch to the standalone TDR measurement to conduct a thorough Drop analysis DOWNSTREAM COMPARISON offers a side by side comparison measurements between TAP GB and CPE which speeds up user analysis time ...

Страница 90: ...CHECK Session Expert COMPARISON COMPARISON windows offer a side by side comparison measurements between TAP GB and CPE which speeds up user analysis time Type of COMPARISON measurements in SESSION EXPERT include DOWNSTREAM DOCSIS PROFILE for OFDM Carriers SMARTSCAN OFF AIR INGRESS ...

Страница 91: ...to view all identified DOCSIS downstream carriers as a Fullscan with any measurements failing the threshold represented in RED and all measurements passing the thresholds represented in GREEN Users can navigate via touchscreen D Pad or Channel Search Users can select their FAVORITES by pressing on the STAR until it is highlighted in Gold ...

Страница 92: ...OCSIS Upstream carriers with any measurements failing the threshold represented in RED and all measurements passing the thresholds represented in GREEN UPSTREAM provides the user with verification of the number of upstream carriers the Upstream Transmit Level TX and In Channel Frequency Response ICFR Users can navigate via touchscreen D Pad or Channel Search ...

Страница 93: ...es with customer CPE or verifies the ONX is provisioned appropriately Throughput testing is available over the DOCSIS connection to test ONX should have at least CM MAC 1 provisioned as a cable modem and DOCSIS SERVICE PLAN should be configured with UPSTREAM AND DOWNSTREAM IP ADDRESSES before THROUGHPUT will display accurate measurements Packet Quality identifies if there is packet loss present in...

Страница 94: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 90 90 2018 VIAVI Solutions Inc viavisolutions com CATV Measurements OneCHECK with HL Leakage ...

Страница 95: ...around the home or business Required Equipment Includes ONX 620 or ONX 630 with DOCSIS 3 1 hardware HL Leakage software option must be present on the ONX HL Leakage Transmitter 60dBmv output RED LIGHT and 40dBmv output GREEN LIGHT HL Leakage Antennas 4a Dual band rubber duck antenna 4b Near Field Probe antenna Used for detecting leaks when attached to ONX Tuned for 138MHz and 757 5MHz HL Tx Connec...

Страница 96: ...r unique WORK ORDER ID and then perform a HL LEAKAGE Test prior to being able to resume testing at the CPE GB and Tap OneCHECK with HL Leakage Leaks will be shown over time on the HL LEAKAGE display while also emitting a siren that will signal proximity to leak MUTE or UNMUTE and VOLUME controls as well as PAUSE and STOP RETEST will be displayed across the bottom ...

Страница 97: ...ith HL Leakage After HL LEAKAGE test is completed and technician deems the home or business coax network sufficiently free from leakage returning to the OneCHECK SETUP screen will display HL LEAKAGE requirement complete Technician can now resume normal OneCHECK testing at CPE GB and TAP ...

Страница 98: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 94 94 2018 VIAVI Solutions Inc viavisolutions com ONX DOCSIS 3 1 Measurements ...

Страница 99: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 95 Testing OFDM ...

Страница 100: ...ng 32 Bonded D3 1 OFDM carrier Upstream DOCSIS 3 1 OFDM A capable Identify OFDM carrier in the lineup Downstream scan measurement requires no learning curve same as D3 0 scan but shows OFDM signal MER over entire OFDM channel provides insight into why higher tier profiles are failing Overall OFDM carrier performance metrics including best and worst case simple pass fail indications In Channel Resp...

Страница 101: ...placement across constellation decision boundaries Correctable vs Uncorrectable determined by number of corrupted symbols relative to CMTS forward error correction level settings If you are having CWEs you may be losing data Uncorrectable CWEs indicate dropped packets think post FEC BER Retransmit is required for recovery There is no recovery from dropped packets for real time apps like VoIP Corre...

Страница 102: ...ial and Proprietary Information 98 Testing PLC PHY Link Channel THINGS TO CHECK Level 15 dBmV 6 MHz MER 15 dB min Lock status locked Uncorrectable CWE none Other info PLC center frequency PLC contains CRITICAL OFDM signal decoding information ...

Страница 103: ...off of either could impair a CM s ability to correctly receive NCP or CWs THINGS TO CHECK Lock status locked Uncorrectable CWE none The NCP tells the modem which CW are present and in which profile to find each CW CWE analysis it is CRITICAL for proper data communication NCP s start at HIGH frequencies and populate down Codewords start at LOW frequencies and populate UP ...

Страница 104: ...rs In practice profile A may be assigned lower mixed modulations like QAM 64 16 so every D3 1 modem can communicate Lower modulation profiles can operate at lower MER CNR and power levels If profile A isn t locked or has uncorrectable CWE a modem may roll back and use only SC QAMs in 3 0 mode THINGS TO CHECK Lock status locked Uncorrectable CWE none Profile A is boot profile ALL 3 1 modems must be...

Страница 105: ...CK Avg level variable 6 dBmV recommended Avg MER variable 36 dB recommended MER at 2 percentile 35 dB recommended MER standard deviation 2 dB recommended OFDM Avg power must be within range Good MER and low noise enable higher modulations CM Minimum CNR MER Performance in AWGN Channel Modulation Up to 1 GHz CNR dB Min P6AVG dBmV 4096 41 0 6 2048 37 0 9 1024 34 0 12 512 30 5 12 256 27 0 15 128 24 0...

Страница 106: ...table CWE none Higher profiles improve network efficiency Optimally more CM run on higher profiles for overall network efficiency and improved customer QoE Profiles enable tiers of service and allow best case service when consistent network constraints inhibit maximum performance Testing viability of all profiles provides quick assessment of network performance to any given test point service outl...

Страница 107: ...o 1 GHz CNR dB Min P6AVG dBmV 4096 41 0 6 2048 37 0 9 1024 34 0 12 512 30 5 12 256 27 0 15 128 24 0 15 64 21 0 15 16 15 0 15 Component Tasks Importance CWE expectations and impact PLC PHY Link Channel Contains CRITICAL OFDM signal decoding information Critical Should have 0 Uncorrectable CWE otherwise OFDM may not work NCP Next CW Pointer Tells modem which CW are present and in which profile to fi...

Страница 108: ...oise identify portions of a carrier where degradation may occur and require possible profile adjustment Unstable MER with drops below 30dB means only profiles running 256 QAM or lower will work Stable MER better than 40 dB means QAM 2048 and 4096 will work In Channel Response identifies roll off and excessive ripple Measuring MER across entire subcarrier list enables identifying potential impairme...

Страница 109: ...K Bonding with OFDM Upstream bonding and Throughput DOCSIS 3 1 systems can provide over 1 Gbps throughput Validating operation at subscribed rates is important to verify customer experience Testing at DOCSIS physical layer identifies RF related impacts on overall service performance Testing both DOCSIS service and Ethernet helps ensure top customer QoE Consumer grade PC HW limitations can prevent ...

Страница 110: ... power in a 6MHz bandwidth Total power of 96 192MHz wide carrier This is not referenced to a 6MHz carrier Total Power Total Power PER Channel 6MHz 10log10 Channel Bandwidth Where Channel Bandwidth would be overall OFDM Bandwidth 6MHz channel bandwidth of 6MHz Channels for a 96MHz wide OFDM carrier the TOTAL power will be 12 04dB higher for a 192 MHz wide OFDM carrier the TOTAL power will be 15 05d...

Страница 111: ...evel ref 6 MHz 1 2 dB below the 8 MHz QAM 256 to maintain the same power Hz PLC carrier average power will be approximately 0 8dB higher than other carriers due to additional pilots and data patterns Total OFDM carrier up to 192MHz power is greatly different than average power in a 6 MHz bandwidth For a 96 MHz wide OFDM carrier the total power will be 12 04 dB higher For a 192 MHz wide OFDM carrie...

Страница 112: ...onfidential and Proprietary Information 108 108 2018 VIAVI Solutions Inc viavisolutions com ONX CATV NETWORK Testing Configure Screens QuickCheck EXPERT Channel EXPERT DOCSIS EXPERT Ingress Expert Return Signal Generator RSG w Loopback ...

Страница 113: ...09 CATV NETWORK CATV NETWORK offers 8 test functions Channel Expert DOCSIS Expert Forward Sweep Active Reverse Sweep Active Sweepless Sweep Downstream Ingress Expert Return Signal Generator w Loopback Quick Check Expert OneCheck Expert Field View with Return Signal Generator ...

Страница 114: ...Confidential and Proprietary Information 110 CONFIGURE All EXPERT test functions will feature a CONFIGURE button when the STOP function is pressed All new test functions are LIVE tests so to access CONFIGURE test must be stopped first ...

Страница 115: ...Viavi Solutions Inc Viavi Confidential and Proprietary Information 111 CONFIGURE TEST POINT TEMPLATE Select TEST POINT TEMPLATE and then manage templates using the VIEW EDIT DELETE or COPY and add new buttons ...

Страница 116: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 112 CONFIGURE LIMIT PLAN LIMIT PLANS are set up in STRATASYNC for help setting up custom LIMIT PLANS see system administrator ...

Страница 117: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 113 CONFIGURE SAVE TEST SAVE TEST is available note that TEST NAME and WORK ORDER ID need to be selected ...

Страница 118: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 114 CONFIGURE VIEW TEST Tests can be viewed from the application they were saved in Search saved tests by WORKORDER ID ...

Страница 119: ...TEST DELTA TAB After loading a saved test file it will appear in the RIGHT HAND TAB Users can cycle back and forth between live measurements and the saved test file by selecting the appropriate tab Note because the saved test in the RIGHT HAND TAB is not live there are no START or STOP buttons ...

Страница 120: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 116 116 2018 VIAVI Solutions Inc viavisolutions com QuickCheck EXPERT ...

Страница 121: ...17 QuickCheck EXPERT QuickCheck Expert can be run in two modes Quick Check Full Scan To populate the FULL SCAN user must first save a channel plan in ChannelCheck before loading it in QuickCheck Expert To populate the QuickCheck mode with channels user must add them manually ...

Страница 122: ...AVING CHANNEL PLANS To save a Channel Plan run the CHANNELCHECK test under CATV After test completes use the BACK button to return to CHANNELCHECK SETUP Select SAVE CHANNEL PLAN A message will display indicating the Channel Plan has ben saved The Channel plan will be named after the WORK ORDER ID ...

Страница 123: ...ry Information 119 QuickCheck EXPERT LOADING CHANNEL PLANS Return to QUICKCHECK EXPERT under CATV NETWORK Test will automatically run STOP test and change APP MODE to FULL SCAN Select CONFIGURE and select CHANNEL PLAN Select the appropriate saved CHANNEL PLAN ...

Страница 124: ... Viavi Solutions Inc Viavi Confidential and Proprietary Information 120 QuickCheck EXPERT FULL SCAN MODE DISPLAY allows the user customize the following To EXIT FULLSCREEN double tap finger on the FULL SCAN ...

Страница 125: ...heck EXPERT QUICK CHECK MODE Select the QUICK CHECK MODE for a more responsive LEVEL MINISCAN mode While test is STOPPED select CONFIGURE and select display of MER and BER and CARRIER CONFIGURATION Select CARRIER CONFIGURATION and then choose ADD CARRIER or REMOVE CARRIER to customize ...

Страница 126: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 122 QuickCheck EXPERT QUICK CHECK MODE DISPLAY allows the user to change dB div and also select AUTO REFERENCE or REFERENCE NOW ...

Страница 127: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 123 123 2018 VIAVI Solutions Inc viavisolutions com Channel EXPERT ...

Страница 128: ...rd gives an overall status on the test Because Channel Expert is LIVE measurements will continue to update once the dashboard indicates 100 Test Point Compensation TPC is shown and can be toggled after users select STOP and CONFIGURE See Section on TPC Setup Max and Mins are displayed for MER dB and Level dBmV ...

Страница 129: ... view the Fullscan with any measurements failing the threshold represented in RED and all measurements passing the thresholds represented in GREEN Users can navigate via touchscreen D Pad or Channel Search as long as CHANNEL VIEW is selected in BLUE Users can select their FAVORITES by pressing on the STAR until it is highlighted in Gold ...

Страница 130: ...l EXPERT SPECTRUM IUC SPECTRUM IUC Ingress Under the Carrier allows the user to view ingress under the selected and adjacent QAM carriers Examples below are real world LTE Ingress and FM Ingress To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected in BLUE ...

Страница 131: ... MER OVER TIME BER OVER TIME on all channels in the background and DQI OVER TIME measured on the channel selected in CHANNEL VIEW These measurements will continue until and be displayed over the last 5 minutes until the measurement is stopped To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected in BLUE ...

Страница 132: ...y Information 128 Channel EXPERT ICFR In Channel Frequency Response In Channel Frequency Response of the specific carrier selected in CHANNEL VIEW and will continue until stopped To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected ...

Страница 133: ...nd SMARTSCAN TILT of the Fullscan TILT channels can be toggled in CATV SETTINGS SMARTSCAN offers a raw frequency domain response of the Fullscan and measures against a defined thresholds for deviation and tilt To rapidly change channels use Channel Search has long as CHANNEL VIEW is selected in BLUE ...

Страница 134: ...lutions Inc Viavi Confidential and Proprietary Information 130 Channel EXPERT FAVORITES FAVORITES is a user defined Miniscan Select favorites channels by highlighting the Gold Star on desired channels in CHANNEL VIEW ...

Страница 135: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 131 131 2018 VIAVI Solutions Inc viavisolutions com DOCSIS EXPERT ...

Страница 136: ...SIS Expert is LIVE measurements will continue to update once the dashboard indicates 100 Test Point Compensation TPC is shown and can be toggled after users select STOP and CONFIGURE See Section on TPC Setup Downstream measurements displayed include Max and Mins for MER dB and Level dBmV and MAX Rx Upstream measurements displayed include MAX Tx and MAX ICFR ...

Страница 137: ...AC Addresses are provisioned using different config files in order to test multiple classes of service users can switch between MACs by selecting DOCSIS SERVICE PLAN User can override cable modem emulation type and chose options other than the deployed DOCSIS SERVICE PLAN that was pushed to the meter via StrataSync useful for matching the DOCSIS chipset configuration of the customer s cable modem ...

Страница 138: ...formation 134 DOCSIS EXPERT CONFIGURE Users can toggle THROUGHPUT CONFIGURATIONS useful when there are multiple throughput servers to test to at any given time Select Override DOCSIS SERVICE PLAN and then choose UPSTREAM or DOWNSTREAM ADDRESS to customize or update ...

Страница 139: ...Solutions Inc Viavi Confidential and Proprietary Information 135 DOCSIS EXPERT CONFIGURE Users can toggle which DOCSIS Channels they wish to measure manually entering them or allowing the ONX to auto discover them ...

Страница 140: ...NSTREAM DOWNSTREAM allows the user to view the DOWNSTREAM DOCSIS CHANNELS with any measurements failing the threshold represented in RED and all measurements passing the thresholds represented in GREEN Users can navigate via touchscreen D Pad or Channel Search as long as CHANNEL VIEW is selected ...

Страница 141: ...on 137 DOCSIS EXPERT OVER TIME MEASUREMENTS Level OVER TIME MER OVER TIME BER OVER TIME and DQI OVER TIME measure the channel that is selected in CHANNEL VIEW and will continue until stopped To rapidly change channels use Channel Search as long as CHANNEL VIEW is selected ...

Страница 142: ...h verification of the number of upstream carriers the Upstream Transmit Level TX and In Channel Frequency Response ICFR TRANSMIT OVER TIME corresponds to the locked upstream carrier highlighted in blue to the left To shift upstream carrier select a different one from the UPSTREAM window D PAD or TOUCH to toggle and the TRANSMIT OVER TIME will update ...

Страница 143: ...ked carrier To toggle scroll to UPSTREAM and choose a different carrier UPSTREAM ICFR and UPSTREAM EQ ANALYSIS will update UPSTREAM EQ ANALYSIS displays the equalizer graph for 16 QAM and 64 QAM upstream carriers By highlighting a specific tap that will indicate the distance to a reflection point in the upstream This is usually the distance from an amplifier to a reflection caused by an impedance ...

Страница 144: ...S SERVICE PLAN The throughput test sends a file upstream to a server The server then sends the file back to the meter Since the file size is known and the time it takes to download the file is known the meter can then calculate the downstream speed The same is done for the upstream The PING TRACEROUTE function can be configured to send configurable ping packets to a destination A TRACEROUTE test c...

Страница 145: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 141 141 2018 VIAVI Solutions Inc viavisolutions com Ingress EXPERT ...

Страница 146: ...TV HyperSpectrum technology Real Time Spectrum Analyzer Innovative overlapping FFT Fast Faurier transform measures all transient interfering signals INGRESS EXPERT is different from Swept Spectrum Analyzers DSAM and Pathtrak its more accurate and has thousands of samples a second Overlapping options provide additional detail ONX630 DSAM6300 ...

Страница 147: ...17 Viavi Solutions Inc Viavi Confidential and Proprietary Information 143 Select CONFIGURE and choose SELECT HIGH FREQUENCY to change SPAN Some models may have 204MHz as an option INGRESS EXPERT CONFIGURE ...

Страница 148: ...dential and Proprietary Information 144 Select HEATMAP PERSISTENCE to change dwell time of the HEATMAP LOW is best for constant noise MEDIUM is best for transient and constant noise HIGH is best for transient only INGRESS EXPERT CONFIGURE ...

Страница 149: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 145 INGRESS EXPERT HEATMAP OVERLAYS ...

Страница 150: ...Confidential and Proprietary Information 146 INGRESS EXPERT AUTO ACG AUTO AGC will attempt keep spectrum view references up to 60dB dynamic range DISABLING AUTO AGC requires the user manually attenuates the signal to prevent OVERRANGE ...

Страница 151: ...ng will allow users to see the noise floor under the upstream carriers If the user performs a DOCSIS EXPERT test before INGRESS EXPERT UCDs will match that of the network and give clear indication of the carriers width and location Additionally UCDs will be demodulated with FREQUENCY LEVEL and SNR calculated and displayed ...

Страница 152: ...etary Information 148 INGRESS EXPERT RECOMMENDED SETTINGS The live display shows energy changing from constant Red Orange to transient Yellow Green Blue Light Blue Turning on UCD can lend assistance when noise is obscuring the carrier see DSAM by comparison ...

Страница 153: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 149 INGRESS EXPERT VS DSAM Tracking Impulse Noise on ONX630 Tracking Impulse Noise on DSAM ...

Страница 154: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 150 150 2018 VIAVI Solutions Inc viavisolutions com ONECHECK EXPERT ...

Страница 155: ...151 ONECHECK EXPERT Like ONECHECK technicians must enter a unique WORKORDER ID and then connect PORT 1 to the desired test point be it at a node amplifiers tap or even at the Ground Block or CPE Technician should adjust Test Point Compensation based on the demarcation point ...

Страница 156: ... EXPERT will allow technicians to double tap on the downstream or upstream results This test is limited to the testing done in ONCECHECK for better correlation to troubleshoot and for great testing functionality select CHANNEL EXPERT DOCSIS EXPERT or INGRESS EXPERT Below a complete list of tests displayed in ONECHECK EXPERT ...

Страница 157: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 153 153 2018 VIAVI Solutions Inc viavisolutions com Return Signal Generator ...

Страница 158: ...avi Solutions Inc Viavi Confidential and Proprietary Information 154 ONX is capable of generating up to 8 return signals CW or QAM at a time each with up to 12dBmV delta between carriers RETURN SIGNAL GENERATOR ...

Страница 159: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 155 RETURN SIGNAL GENERATOR CONFIGURATION ...

Страница 160: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 156 156 2018 VIAVI Solutions Inc viavisolutions com Field View with Return Signal Generator ...

Страница 161: ...ONFIGURE button Select CONFIGURE TELEMETRY to enter the precise frequency of the FIELD VIEW TELEMETRY if this is not known reach out to local HE resources for information SELECT NODE will take the technician to a screen displaying all the Pathtrak Nodes currently in broadcast NOTE when changing nodes in FIELD VIEW be sure that node matches physical location ...

Страница 162: ...ONFIGURATION will allow technician to turn on user created carriers while simultaneously viewing the return from the HE mounted Pathtrak Return Path Monitoring Ports this will allow a single technician the ability to optimize a node from the field Select ADD CARRIER for screen showing configuration EDIT or REMOVE also available ...

Страница 163: ...rmalization NORMALIZATION is a process by which the ONX will transmit through Port 1 and receive through Port 2 cancelling out the loss associated with the cable and ensuring accurate transmit back to the Hub Before FIELD VIEW w RSG is used the normalization process should be done to ensure accuracy ...

Страница 164: ...tary Information 160 FIELD VIEW with RSG Select NODE and choose either SHOW ACTIVE NODES From the list of ACTIVE NODES chose SELECT NODE NODE INFO is available DISPLAY allows technician to change the spectrum dB div AUTO REFERENCE or toggle MAX and MIN HOLD ...

Страница 165: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 161 161 2018 VIAVI Solutions Inc viavisolutions com ONX CATV Fiber Testing P5000i Probe Microscope MPx0 Power Meters ...

Страница 166: ... Inc Viavi Confidential and Proprietary Information 162 OneExpert CATV Fiber Optics Integration Fiber Inspection Scope P5000i via USB Auto pass fail analysis Optical Power Measurement MP 60 80 Optical Broadband Power Meter ...

Страница 167: ...scope When P5000i Probe Microscope is attached to ONX through USB Fiber Tools menu automatically appears After plugging in patch cord or inserted probe into bulkhead fiber end face will appear and can be focused or auto centered using controls on P5000i Autotest can be conducted and results saved from results screen ...

Страница 168: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 164 164 2018 VIAVI Solutions Inc viavisolutions com Forward and Return Sweep ...

Страница 169: ...Level 90 dBµV 80 110 Forward Sweep Level 80 dBµV 80 110 Reverse Telemetry Frequency 6 MHz ONX sweep settings SDA5500 Telemetry Forward Telemetry Frequency 259 MHz SDA5510 Telemetry Forward Telemetry Frequency 259 MHz Reverse sweep User mode Single user SDA5500 Multiple user SDA5510 Sweep limits 0 20dB Settings in ONX should match settings in Sweep Control Units ...

Страница 170: ...nfidential and Proprietary Information 166 ONX Templates for Test Point Locations Configure Test Points for loss and sweep settings Easily switch between Test Points at any test Multiple test point locations can be customized and stored ...

Страница 171: ...Point Compensation 100 100 dB Reverse TPC Test Point Compensation 100 100 dB Reverse Sweep injection 68 113 dBµV Reverse Telemetry Level 68 113 dBµV Forward Sweep Tilt Compensation 100 100 dB Forward sweep Low Tilt Frequency Forward sweep High Tilt Frequency Reverse Port mode Single port port 1 ONX Dual port port 1 FW port 2 RV ...

Страница 172: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 168 Forward Sweep Example analog QAM carrier digital QAM carrier ...

Страница 173: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 169 Forward Sweep Example Absolute sweep Referenced sweep Alignment ...

Страница 174: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 170 Reverse Sweep Example Absolute sweep Alignment Referenced sweep ...

Страница 175: ...ns Inc Viavi Confidential and Proprietary Information 171 Forward Tilt Compensation 900 MHz first sweep points Apply sweep tilt compensation 900 MHz first sweep points 1218 MHz last sweep points 1218 MHz last sweep points ...

Страница 176: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 172 Forward Tilt Compensation ...

Страница 177: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 173 Reverse Sweep example ...

Страница 178: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 174 174 2018 VIAVI Solutions Inc viavisolutions com Sweepless Sweep ...

Страница 179: ...SWEEPLESS SWEEP utilizes the downstream carriers to create a known reference Technicians use this known reference usually taken at the node so sweep and balance the remaining amplifiers out to the end of the line To perform sweepless sweep technicians should select the icon from the Home Screen ...

Страница 180: ... Solutions Inc Viavi Confidential and Proprietary Information 176 SWEEPLESS SWEEP The first response is called the ABSOLUTE response To save a REFERENCED response select STOP and then CONFIGURE SAVE TEST REFERENCE ...

Страница 181: ...ian can now see the name of the reference for verification The SWEEP LIMIT often set to 2 or 3dBmv can be edited Technicians can now select REFERENCED to see the referenced response which will appear flat As technicians move down the cascade they will now be seeing variations from the originally captures referenced location ...

Страница 182: ... 2017 Viavi Solutions Inc Viavi Confidential and Proprietary Information 178 SWEEPLESS SWEEP ...

Страница 183: ...www viavisolutions com ...

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