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Multi LAN 350

Operation

32

NEXT worst case result screen

Note:

if no remote is detected, then the instrument continues testing after 1s. In this

case the operator must ensure a proper termination.

NEXT PLOT screen

After entering this screen individual or all NEXT (frequency) plots together with test
standard limit curve are shown on the display. Margin and NEXT at the cursor position
are displayed under the graph.
The following actions can now be performed:

ESC key:

return to NEXT result screen

NEXT PAIR:

view next plot

Left, Right key:

move cursor left and right to view margin and result at selected frequency

Up, Down key:

move cursor up and down along the amplitude axis

NEXT plot screen

5.3.4 ELFEXT, Remote ELFEXT

FEXT (Far End Crosstalk) defines crosstalk caused by the coupling of a signal from a
pair transmitted on one cable side into an adjacent pair with the receiver on the other
side.
ELFEXT (Equivalent Level Far End Crosstalk) is calculated from FEXT and the
attenuation on the receiver pair.
The main result is given as the worst case margin in dB to the test standard limit. High
ELFEXT causes typical crosstalk problems: data corruption, retransmittions etc.

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Содержание MI 2016 Multi LAN 350

Страница 1: ...Multi LAN 350 MI 2016 User Manual Version 2 2 Code No 20 750 745...

Страница 2: ...si http www metrel si Mark on your equipment certifies that this equipment meets the requirements of the EU European Union concerning safety and electromagnetic compatibility regulations 2003 2005 Met...

Страница 3: ...Standard set Ordering code MI 2016 ST 15 3 2 Professional set Ordering code MI 2016 PS 15 3 3 Optional accessories 15 3 4 Technical specifications 16 3 4 1 Length 16 3 4 2 Propagation Delay 16 3 4 3...

Страница 4: ...Complete Near End Far End Autotest 48 5 5 2 Selecting the Autotest Type 49 5 5 3 Testing procedure 50 5 6 Autotest fiber optic 51 5 6 1 Types of testing configurations 51 5 6 2 Testing procedure 52 5...

Страница 5: ...e 69 5 13 11 Initial settings 70 5 13 12 Factory settings 70 5 13 13 COM port 70 5 14 HELP function 71 6 LAN Link Software package 72 6 1 Creating test reports 73 6 1 1 Defining original location name...

Страница 6: ...rumentation eg Optical Power Meter PM420 2 way Autotest function for fast and reliable testing Talk Trace interface provides full duplex communication and is also intended for locating cables Locators...

Страница 7: ...placement Note Insert cells correctly otherwise the instrument will not operate and the batteries could be discharged If the instrument is not to be used for a long period of time remove all batteries...

Страница 8: ...ack significantly decreased operation time If no improvement is achieved after performing several charging discharging cycles the shape of individual batteries should be determined by comparing batter...

Страница 9: ...dware If using an other remote unit as delivered it is obligatory to perform it The calibration can be performed with the Attenuation calibration module ACM 350 When the instrument is used continuousl...

Страница 10: ...Menu Description SETTINGS adjustment of system parameters such as time RS232 settings etc STANDARD selection of test standard cable type test procedures AUTOTEST performs predefined Autotests SINGLETE...

Страница 11: ...y turns OFF after 30s if no keys used LIGHT right arrow Increase display contrast LIGHT left arrow Decrease display contrast ARROW keys Move cursor and select parameters ENTER Starts test procedures c...

Страница 12: ...under this cover which needs to be unscrewed when opening the instrument for service and calibration purposes 3 Screw unscrew to remove carrying strip or to open the instrument 4 Information label 5 B...

Страница 13: ...Power on LOW BAT Empty battery PASS Autotest passed FAIL Autotest failed 2 2 2 1 Remote unit connector panel 1 Baseline interface connector 2 Audio jack Microphone input 3 Audio jack Phone output 4 R...

Страница 14: ...nformation 14 2 2 4 Channel Link adapter 1 2 1 High Quality CAT6 RJ45 jack 2 Baseline interface plug 2 2 5 ATTENUATION Calibration module 2 2 6 IR adapter for testing fiber cables 1 2 1 IR receiver 2...

Страница 15: ...pack 12 pcs 3 2 Professional set Ordering code MI 2016 PS Instrument MultiLAN 350 2 pcs Permanent Link Adapter 2 pcs Channel Link Adapter 2 pcs Carrying bag 2 pcs LANlink PC Software RS 232 cable USB...

Страница 16: ...e I 1 view chapter 5 2 3 4 1 Length Range Resolution Accuracy 0 0 99 9 m 100 300 m 0 1 m 3 of reading 5dig 4 of reading Propagation velocity rate 0 50c 0 99c considers set value in STANDARD main menu...

Страница 17: ...2 dB at 250 MHz Measuring Range 0 0 90 0 dB 0 1 dB defined up to 3 dB over category 6 limit 65 dB max 3 4 8 PSNEXT Remote PSNEXT Frequency Range Resolution Accuracy 1 MHz 350 MHz 0 15 MHz better than...

Страница 18: ...z Measuring Range 0 0 40 0 dB 0 1 dB 3 dB over test limit 23 dB max 3 4 12ACR Remote ACR ACR is computed from NEXT and Attenuation results ACR f NEXT f Attenuation f The accuracy is calculated from th...

Страница 19: ...ed Selectable propagation velocity rate 0 50c 0 99c Gain autogain 6 stages Note Additional error sources that affect the distance measurements Uncertainty of NVP nominal propagation speed Attenuation...

Страница 20: ...limited Communication RS232 serial interface for connection to a PC Selectable 2400 115200 baud 9 pin D connector USB connection to a PC Auto Off time 10 min Remote Unit MultiLAN 350 RU Operating temp...

Страница 21: ...connection at the patch panel a horizontal cable segment up to 90m long a consolidation point optional connection at the telecommunications outlet The important feature is that in the Permanent link t...

Страница 22: ...ontal cable segment up to 90m long up to 10m of equipment patch cables with transition connector and outlet connector In the Channel test the network equipment patch cables influence the result theref...

Страница 23: ...standards storing measuring results into MultiLAN350 memory base creating Test Reports with LANlink 5 2 Presentation of results 5 2 1 Summary results Copper cables NEXT PSNEXT ELFEXT RETURN LOSS ATTE...

Страница 24: ...margin or worst result is marked with a bullet in front of the result Overall PASS FAIL in Single Test Each Single Test is equipped with an overall Pass Fail judgement the marked result is considered...

Страница 25: ...unaccuracy limit curve Result PASS amplitude result curve frequency instrument unaccuracy limit curve Result PASS amplitude result curve frequency instrument unaccuracy limit curve Result FAIL amplitu...

Страница 26: ...ry and can be downloaded to a PC untill data from a new Autotest or Single Test overrun them 5 2 4 Summary result Optical fiber OPTICAL INSERTION LOSS The actual measured value is displayed as a resul...

Страница 27: ...ult is shown on the display together with an overall Pass Fail decision Following actions can now be performed ESC key return to Single Test main screen TEST repeat the test REPEAT the Wire Map test i...

Страница 28: ...mistakenly twisted with a wire from an other pair If the crosstalk between two pairs is extraordinarily high the instrument warns that the split pairs could be the reason Note Split pairs cannot be fo...

Страница 29: ...s can be detected by only one user without the remote unit on the far cable end 5 3 2 PSNEXT Remote PSNEXT PSNEXT Power Sum Near End Crosstalk defines the coupling on one cable pair from all other pai...

Страница 30: ...r entering this screen individual or all PSNEX plots together with test standard limit curve are shown on the display Margin and result at the cursor position are displayed under the graph The followi...

Страница 31: ...problems are poor twisting on connector points non matched connection components split pairs etc The main result is given as the worst case margin in dB to the test standard limit Test procedure Make...

Страница 32: ...ult screen NEXT PAIR view next plot Left Right key move cursor left and right to view margin and result at selected frequency Up Down key move cursor up and down along the amplitude axis NEXT plot scr...

Страница 33: ...n MARGINS select margin result screen Up Down view other pairs ELFEXT margin result screen ELFEXT worst case result screen Note The ELFEXT measurement can t be performed without the remote unit ELFEXT...

Страница 34: ...n on the receiver pair High PSELFEXTs cause typical crosstalk problems data corruption retransmittions etc The main result is given in dB as the worst case margin to the test standard limit Test proce...

Страница 35: ...now be performed ESC key return to PSELFEXT result screen NEXT PAIR view next plot Left Right key move cursor left and right to view margin and result at selected frequency Up Down key move cursor up...

Страница 36: ...WORST select worst case result screen MARGINS select margin result screen Return Loss margin result screen Return Loss worst case screen Note The Return Loss measurement can t be performed without th...

Страница 37: ...e cable Select and start the Attenuation test After the Remote unit is connected and the test is completed all four attenuation results and an overall Pass Fail decision are shown on the display The f...

Страница 38: ...T PSACR f PSNEXT f Attenuation f PSACR results consider Attenuation and PSNEXT It is taken in account that at shorter cables the PSNEXT could be higher without degradation of the link performance Ther...

Страница 39: ...requency plots together with test standard limit curve are shown on the display Margin and result at the cursor position are displayed under the graph The following actions can now be performed ESC ke...

Страница 40: ...nt that at shorter cables the NEXT could be higher without degradation of the link performance Therefore ACR is very suitable for the estimation whether the crosstalks are critical or not Test procedu...

Страница 41: ...the cable To get the right result the pulse propagation speed has to be known The NVP factors can be set nominal velocity propagation factor given by percents of light speed for cables in the Cable T...

Страница 42: ...on the far end of the unit under test Select and start the Delay skew test After the Remote unit is connected and the test is completed the results Pass Fail information and the applied limit are sho...

Страница 43: ...e cable In general the characteristic impedances in high frequency systems must be matched to ensure a regular data flow Every change in impedance along the link will cause a reflection and decrease t...

Страница 44: ...main screen TEST repeat the test DC resistance result screen Note If no remote is detected within 1s the instrument continues with testing In this case the operator must ensure correct termination sho...

Страница 45: ...ality can be checked in this way Open cable cable break incorrect termination at long distance Zanom Zcable The pulse is reflected back at the anomaly point Through increasing attenuation especially a...

Страница 46: ...s in patch cable have caused this problem 5 4 2 Scope Test procedure Scope Main Screen In Scope Main Screen the user can choose between TDR or TDnext Left Right keys Under the selected function the as...

Страница 47: ...ew next adjacent pairs graph Left Right key move cursor left and right to view amplitude at selected distance STOP during continuity mode stop the test In TDnext Result screen a TDnext graph amplitude...

Страница 48: ...ents must be performed on both near and far end cable sides During Remote tests the device on the far cable end acts as the main unit performs the measurements while the device on the near cable side...

Страница 49: ...has two separate segments for the Near End and Far End tests The results from a Near End and a Far End tests that are stored in the same memory location are unified and considered as a complete Autote...

Страница 50: ...are shown on the display Refer to chapters 5 8 and 5 11 for information about working with the instrument on the remote cable side At the end of Autotest the overall Pass Fail decision and Headroom in...

Страница 51: ...can be sorted in a clear and simple way as proposed for MM LAN fiber installations can be stored in a way which enables creation of detailed verification reports 5 6 1 Types of testing configurations...

Страница 52: ...A 1300nm optical power meter optical source 6 B 1300nm optical power meter optical source 7 A 1300nm optical source optical power meter 8 B 1300nm optical source optical power meter 5 6 2 Testing pro...

Страница 53: ...ower meter for optimum data transfer There is a confirmation long short beep if the data was received successfully In case that the data transfer failed there is a warning long beep The send result an...

Страница 54: ...Up Down Left Right select a result inverted TEST clears the selected result SAVE saves the results refer to chapter 5 11 for more information Note Typical causes for a failed tranfer can be distance...

Страница 55: ...ppendix 2 a table with preprogrammed test standards and cable types with associated preprogrammed test and parameter settings can be found For frequency dependent limits only data at some typical freq...

Страница 56: ...are displayed The following actions can be performed ESC key return to the Cable type screen New settings are not considered Up Down select the NVP value Default NVP value for the selected cable type...

Страница 57: ...13 10 for how to select fiber cables measuring mode Test standard fiber cable type an other fiber link parameters can be set in the Test Standard Menu Pass Fail limits are calculated on basis of sele...

Страница 58: ...rd screen New settings are discarded Up Down select the cable type and fiber link data Left Right select the data Enter set configuration is stored The instrument returns to Test Standard main screen...

Страница 59: ...key regardless of the function which is currently set except in positions Remote and Locator After the Talk command the instrument will try to connect itself with the Remote unit Until the Remote uni...

Страница 60: ...es not need to interchange the measuring tools on both cable sides to make a complete cable test Remote screens Remote main screen Remote screen during operation Commands from the main unit are execut...

Страница 61: ...sed on links where only pairs 1 and 3 wires 3 5 4 6 are connected Locators 7 to 12 can be also used on links where only pairs 2 and 4 wires 1 2 7 8 are connected When using Locators 13 to 28 all pairs...

Страница 62: ...menu the MultiLAN 350 memory structure is displayed The structure is divided into three numbered levels that define a location The level names used are OBJECT FLOOR and CABLE Each location has assign...

Страница 63: ...est can be stored An occupated memory location It is possible to overwrite the data that are already stored The user will be asked for confirmation YES Saving Autotest results for optical fiber cables...

Страница 64: ...result in the selected location If the location is occupated the user will be asked for confirmation ESC cancel the saving procedure After the saving procedure the previous menu is displayed Note The...

Страница 65: ...unit is set in Talk Trace mode or Use headphones to communicate After the Main unit has been disconnected from the Talk Trace mode the TALK LED is switched off Low battery indication A flashing LOW BA...

Страница 66: ...with the remote unit Press ENTER to perform the calibration A confirmation is displayed if the procedure is completed succesfully Refer to chapter 2 1 4 for more information about calibration of the i...

Страница 67: ...LEAR MEMORY delete Autotest results Clear Autotest screen 5 13 5 Clear Memory The complete memory content can be cleared In this menu The content is cleared when pressing CLEAR The memory content will...

Страница 68: ...e backlight is automatically switched off after 20 seconds Normal mode no Autooff In order to save battery power it is recommended to use the Autooff mode 5 13 9 Noise Filter Excessive noise degrades...

Страница 69: ...Note The measurement results are likely to be be impaired in presence of noise If the results are still impaired despite the noise filter is switched on the noise source must be found and switched off...

Страница 70: ...eted 5 13 12 Factory settings The factory settings menu is password protected and not accessible to the user 5 13 13 COM port In this menu communication port can be selected After entering this menu t...

Страница 71: ...Operation 71 5 14 HELP function The HELP function can be accessed anytime by pressing the HELP key Up Down select item of interest ENTER Up Down more HELP ESC exit Help Menu Initial Help screen Help s...

Страница 72: ...9x NT 2000 XP The opening screen is the starting point for all actions It provides access to all functions by clicking on toolbar buttons or of selecting pull down menus File In this menu files can b...

Страница 73: ...es very complex and difficult to examine Therefore the operator can choose between three detail levels and also print them out Full Detail Report Full Detail Report provides the most complete informat...

Страница 74: ...ical Plot window 6 1 5 Saving Autotest Result or Plots for Documentation Purposes Complete Autotest results together with the installation structure and plots can be saved for documentation purposes E...

Страница 75: ...est result window optical fiber cable 6 2 Printing out a test report or plot After the test report is edited locations renamed comments added test site data etc it can be printed out A confirmation pr...

Страница 76: ...0 63 Length length single test 39 length in Scope test 43 Locator locators 54 Manufacturer 8 Margin 22 Memory size 54 clear 60 recalling 58 NEXT 29 NVP default settings list App 2 manual setting 45 O...

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