TX125 User Manual
Contents
1. TX125 User Manual Page 44 of 76 The display shows MAIN MENU ny CROSSTALK y Press the key to configure the test The display changes to choose end AN nonnnnnnnnnnnnnn Where nn nnn is the last end selected It may either be near end NEXT or far end FEXT Use the and keys to change between NEXT and FEXT Pressing the key will go back to the previous selection display When the desired option is displayed press the key to move to the next stage The display changes to first freq NK ff ff fmHz gt Where fffff is the frequency last used eg 500 0 Hz m is the frequency multiplier eg k or M To accept the frequency shown press the key To change the frequency press the key and then the and keys to move the cursor which is indicated by a flashing character over the desired digit and use the and keys to change the value of the digit When TX125 User Manual Page 45 of 76 the frequency is set as desired press the key repeatedly to bring the cursor to the character immediately before the H character and then press it once more Note The and auto repeat if held pressed Pressing the key repeatedly will get back to the previous selection display The display changes to last freq Ver 500 0 fffffmHz Where fffff is the frequency last used eg 2 000MHz To accept that frequency as shown press the key To change the frequency use the key and then the and keys to move the cursor which is in2. e User Configuration of Date and Time Date Format Auto Termination and PC Connection 3 2 Remote The Remote is the TX125 unit located at the exchange end of the line It is controlled via commands from the Controller It contains the following subsystems e A calibrated signal source 50Hz to 2 000MHz e A line identification source ID tone e A set of line terminators 100Q 1200 1350 6000 9000 TN12 e Exchange end connection switching Exchange to PUT PUT Open PUT Looped and PUT terminated Up to three Remote s may be attached to the same PUT Each is independently controlled by the Controller The address of a Remote is selected at the Remote only TX125 User Manual Page 12 of 76 To extend battery life the Remote automatically switches to low power line monitor mode a few seconds after completing the last function 3 3 Controller The Controller is the TX125 unit located with the operator It contains the following subsystems e Measurement instruments AC and DC Voltmeter Narrowband Voltmeters Ohmmeter and Insulation Resistance Meter Balance Longitudinal Conversion Loss Meter e A calibrated signal source for Near End Cross Talk NEXT measurement 50Hz to 2 000MHz e A set of line terminations 100Q 120Q 1350 600Q 900Q TN12 complex To extend battery life the Controller automatically switches off two minutes after the last keystroke or completion of a test sequence 3 4 Probe
3. The Probe in conjunction with the Remote is used to identify the PUT The Probe only operates when its ON key is pressed TX125 User Manual Page 13 of 76 4 The Remote 4 1 Features PUT 2 Socket PUT 1 Socket Hook TN 48v Power Socket TX125 pica LINE TEST SET LCD Display REMOTE Tefetech POWER ON MODE IS ALWAYS EXCHANGE CONNECTED PRESS ID TO SELECT PAIR IDENTIFY AND TO CHANGE WARBLE TONE POWER ON ADDRESS IS ALWAYS A PRESS ADD TO CHANGE Pair ID Tone Key ADDress Change Key TN 4 2 Power On The Remote is switched on by inserting the Line 1 test lead It remains on while the test lead is inserted TX125 User Manual Page 14 of 76 After power on the following message is briefly displayed Teletech TX125R Software ver xx Where xx is the software version The display then briefly changes to copyright c 2002 Teletech Then the battery is checked The following message is briefly displayed BATTERY IS nnnn Where nnnn is either HIGH GOOD LOW or FLAT Caution Please replace batteries when the display shows FLAT After a few seconds the display changes to EXCH CONNECTED ADDRESS n Where n is either A B or C The Remote now waits for commands from its keyboard or the Controller TX125 User Manual Page 15 of 76 4 3 4 4 4 5 Caution To maximise battery life remove Test Lead 1 after use Test Leads Remotes are supp
4. Loop The PUT is looped short circuited at the Remote The Controller injects 1mA DC into the looped line to measure the Loop Resistance The white wire at the Remote is shorted to the PUT to enable Resistive Fault Location Tests With the Controller removed other test equipment may be used on the looped line Remote Controller a Exchange Line 9000hm A white green To Loop short circuit the PUT press the LOOP key The display changes to LINE LOOPING PROCESS ING This message is displayed while the configuration is set up and the PUT resistance measured The display then changes to LINE LOOPING LOOPED nnnnQ Where nnnn is the looped line resistance It has a range of 0Q to 30000 Values greater than 30000 are shown as gt 3 0kQ TX125 User Manual Page 27 of 76 The Loop Resistance is read every second and displayed until the Controller powers off automatically or another mode is selected If a foreign battery is detected the PUT will not be looped The following message is displayed FOREIGN BATTERY LOOP NOT DONE TX125 User Manual Page 28 of 76 5 10 Open The PUT is isolated from the exchange line and then open circuited The exchange line is terminated with a 900 ohm resistor The Controller measures in turn the six AC and DC Voltages A leg B leg A leg Ground and B leg Ground When the first voltage display appears the PUT is open circuit at t
5. Manual Page 62 of 76 5 20 5 PC Connection The PC connection is used to transfer Sequences and Results between the TX125 and Windows PC via a Windows PC serial port This feature is fully described in the TX125PCI Application User Manual To enable PC Connection mode go to the Setup Menu and use the and keys to find the menu item PC CONNECTION The display shows SETUP MENU ny PC CONNECTION gt Press the key to start The display changes to PC CONNECTION ENABLED When the PC Connection is no longer required press the key to return to the Setup Menu Note The TX125 does not autopower down in PC Connection TX125 User Manual Page 63 of 76 6 The Probe 6 1 Probe Features Probe Tip os TX125 DIGITAL LINE TEST SET PROBE Speaker Earphone Socket Press and hold to operate TX125 User Manual Page 64 of 76 6 2 Probe Operation Press and hold the key and position the tip in the vicinity of the pair to be identified The distinctive ID tone will be at a maximum level when the Probe is close to the correct pair Due to capacitive coupling the ID tone may be detected on pairs other than the correct one The correct pair will have a null minimum signal level between the two wires There will be no null between wires of other pairs An optional earphone see Appendix E may also be used with the Probe to increase audibility particularly in areas with high background noise levels TX125 User
6. Remote e Probe Testing is controlled from the Controller The Controller also display s and stores the test results The Remote places signals on the Pair Under Test PUT and terminates the Pair Under Test as commanded by the Controller The Probe is used to detect the ID tone placed on a PUT by the Remote The Remote and Controller have a two line by sixteen character alphanumeric LCD display for menu operation and results display A membrane keyboard is used to select and start operations A beeper provides audible feedback Each unit is powered by a 9V alkaline battery and utilises circuitry designed to maximise battery life The Remote may also be powered from the 48V Exchange Battery Measurements and Functions The TX125 performs the following measurements e Line AC and DC Voltage e Insertion Loss over the frequency range of 50Hz to 2MHz with any available line termination e Insertion Loss over user selected frequency ranges with multiple steps and any available termination e Longitudinal Conversion Loss Line Balance e Far and Near End Crosstalk FEXT amp NEXT TX125 User Manual Page 11 of 76 e Loop Resistance e Insulation Resistance at nominally 5 00VDC The TX125 has the following functions e User defined sets of tests called Sequences e Control of the termination of the Pair Under Test PUT at the exchange end Open Looped and terminated e Pair Identification e Store and View test results
7. impedances Pressing the key will go back to the previous selection display When the required impedance is set press the key to accept the value and move to the next stage TX125 User Manual Page 60 of 76 The display changes to i freq term ny 000 gt Use the and keys to step through the available impedances Pressing the key will go back to the previous selection display When the required impedance is set press the key to accept the value and move to the next stage The display changes to hi starts at ny fffffmHz gt Where fffff is the frequency last used eg 10 0kHz To accept that frequency as shown press the key To change the frequency use the key and then the and keys to move the cursor which is indicated by a flashing character over the desired digit and use the and keys to change the value of the digit When the frequency is set as desired press the key repeatedly to bring the cursor to the character immediately before the H and then press it once more TX125 User Manual Page 61 of 76 5 20 4 Serial Number TX125 Controller contains a unique serial number embedded in its hardware To view the serial number go to the Setup Menu and use the and keys to find the menu item SERIAL NUMBER The display shows S E FC E U Z E ENU ny SER UMBER gt Pressing the key changes the display to SERIAL NUMBER 098765 Pressing any arrow key returns the display to the Main Menu TX125 User
8. parts Pay particular attention to the insulation around the connectors Inspect the test leads for damaged insulation or exposed metal Check the test leads for continuity Replace damaged test leads before using the equipment Verify the equipment operation by measuring a known value Do not use the equipment if it operates abnormally Protection may be impaired When in doubt have the equipment serviced Do not apply more than the rated voltages to the equipment Use the correct connections and functions for your measurements When connecting the test clips be sure to keep your fingers away from potentially live metal parts Take extra care when performing the Insulation Resistance test There is nominally 500 volts applied to the Pair Under Test PUT Ensure you warn others when this is being carried out Ensure that the equipment is removed from the PUT before opening the case Do not operate the equipment with the case opened TX125 User Manual Page 9 of 76 Use the recommended battery only Ensure it is installed correctly Replace the battery as soon as the BATTERY FLAT message is displayed When servicing the instrument use only certified replacement parts Breaking electrical connections may generate sparks This instrument is not to be used in areas in which flammable gases exist or may exist TX125 User Manual Page 10 of 76 3 1 General Description The TX125 consists of three units e Controller e
9. the Balance measured TX125 User Manual Page 35 of 76 After the measurement is made the display changes to LINE BALANCE EE LCL nnndB Where cece is an assessment of the state of balance of the line and will be either GOOD FAIR or BAD The thresholds are GOOD gt 57dB FAIR 51 57dB BAD lt 51dB nnn is the Balance in dB If the Balance is greater than 70dB it is shown as gt 70 The display will remain in this state until the Controller powers off automatically or another mode is selected TX125 User Manual Page 36 of 76 5 13 Single Frequency Loss A 10dBm 600Q or 0dBm 100Q sinusoidal signal is placed on the PUT by the Remote The Controller measures the received level and calculates the Insertion Loss Any available termination may be selected Remote Controller Term e C k A Exchange Line Q 50Hz 2MHz Term o d gt 9000hm To run the Single Frequency Loss test go to the Main Menu and use the and keys to locate the menu item ONE FREQ LOSS The display shows MAIN MENU ny ONE FREQ LOSS gt Press the key to configure the test The display changes to choose freq Nver gt fffffmHz Where fffff is the frequency last used eg 121 6kHz m is the frequency multiplier eg k or M TX125 User Manual Page 37 of 76 To accept the frequency shown press the key To change the frequency press the key and then th
10. 1 Power On When the Remote is first powered on by inserting Line test lead it defaults to the EXCHANGE CONNECT mode The Pair Under Test PUT is connected through to the Exchange line The following message is displayed EXCH CONNECTED ADDRESS n 4 7 2 ID Tone Pressing the key causes the Remote to place the ID tone on the PUT The following message is displayed during this time SENDING ID TONE ADDRESS n Press the key again to return to Exchange Connect TX125 User Manual Page 17 of 76 4 7 3 ADDress The Remote s address is changed while the Address is being displayed by repeatedly pressing the key to sequence through each possible address A B or C If the address is not currently being displayed press the key to show the address and then press repeatedly to select the desired address 4 7 4 Remote Display States As an operational aide the Remote displays its operating mode In addition to those already shown the displays are SHORT CIRC Us IER ADDRESS n OPEN CIRCUITED ADDRESS n LOSS TESTING fffffmHz tttt BALANCE TESTING ADDRESS n CROSSTALK TEST fffffmHz tttt Where fffff is the frequency m is the frequency multiplier blank K or M tttt is the termination setting at both ends of the line n is a character A B or C TX125 User Manual Page 18 of 76 5 The Controller 5 1 Features PUT 2 Connector TR SE PUT 1 Connector E P TX125 DIGITAL UNE TEST SET LCD Display CO
11. 8 Exchange Connect 2420 SEE ere eee ti cli 26 EE Dee EE 27 5 10 O aa twa SEER teed 29 5 11 Insulation Resista aan renees onda 31 5 12 Line Balance viii Ae Ae aan edit 35 TX125 User Manual Page 5 of 76 5 13 single Frequency EEN 37 5 14 Multiple Frequency Loss 40 5 15 CrOSStal EE 44 5 16 Controller Address ooooooononocccccnncccccoconononconnnnncnnnnnnnnncnnnnnannnnos 49 5 17 e Uer 50 5 18 MIES A A Ad 52 5 19 SEQUENCES cid da EEE een raed 55 5 20 SetU ET 57 5 20 1 Date TEE 58 5 20 2 Set Date And Time 00 cceccececce ere reen 59 5 20 3 Set Auto Termination ooooonncnnonocccnnncccnnnnononccnnnnnnnnnnnnnn cnn 60 5 20 4 Serial Number c edestecccceaescasdectactectatescceseenaecseedeesensnannenes 62 5 20 5 PC CONNECCION kriisiin a a EENE 63 6 The Probeiert ianen a aa EE 64 6 1 Probe Features nenene nnn 64 6 2 Probe Operation 65 Appendix A leie ere EEN 66 Appendix B Self Test Sequence oococcccccncocococccocnnnnonnnnononcnnnnnnnnnna mencion 68 Appendix C Troubleshooting A 70 Appendix D Technical Specifications ooooonmonnnncccnnnnncnnncocconcnncnnnnnnnnnnos 72 Appendix E Order e EE 74 TX125 User Manual Page 6 of 76 To avoid injury read Safety Information and A Warnings and Precautions before using this instrument 1 Introduction The TX125 consists of three hand held instruments that enable a sole operator to carry out a comprehensive series of tests to determine whether the ca
12. AIR ID gt Press the key to start Pair Identify The display changes to IDENTIFY OCESSING while the Remote is being configured after which the display changes to PAIR IDENTIFY USE PROBE The Remote has now placed the ID TONE on the PUT The ID tone may only be removed by selecting another test TX125 User Manual Page 50 of 76 The display will remain in this state until the Controller automatically powers off or a blue key is pressed TX125 User Manual Page 51 of 76 5 18 View Store Results of tests may be stored in non volatile memory The stored measurements may be viewed on the display or may be uploaded to a computer via the PC Connection Stored results may only be deleted using the TX125PCI Application Each test may be seen as being stored as a vertical column of data with the test name at the top then the date and time of the test then the parameters for the test if any then the results of the test Tests which repeat such as OPEN and LOOP save only the first set of measurements to the store The most recent measurement is stored in the right most column and this is the measurement which is displayed when View Store is entered A typical stored could look like this least most recent recent test tests other Loss Balance IR Loop FEXT test date time date time date time date time date time results freq amp term reading reading reading freq amp term reading readi
13. Manual Page 65 of 76 Appendix A Applications A 1 Using Multiple Remotes A pair gain system is to be installed on a long line and two repeaters are to be used The section of line from the exchange to the first repeater site is tested with a Remote and Controller set to Address A Located at the Located at Exchange Repeater 1 site Remote A Controller address A Fig A Testing the First Section of a Long Line The Remote at the Exchange is then set to EXCH CONN mode A second Remote set to Address B is positioned at the first repeater site and the section of line from here to the second repeater site is then tested with the Controller set to Address B Located at the Located at Located at Exchange Repeater Repeater 2 EXCH CONN site site Remote A Remote B Controller address B Fig B Testing the Second Section of a Long Line TX125 User Manual Page 66 of 76 This process is then repeated one more time adding a Remote at the second repeater site This Remote is set to address C Located at the Located at Repeater 1 Located at Repeater 2 Located at Exchange site site Customer site EXCH CONN EXCH CONN Remote A Remote B Remote C Controller address C Fig C Testing the Third Section of a Long Line TX125 User Manual Page 67 of 76 Appendix B Self Test Sequence This Sequence is commonly installed in all TX125 Controllers when they leave the factory To run the Self Test Sequence connect the Remote
14. NTROLLER Power ON key Navigation Exchange Connect EXCH Keys CONN Open Line Insulation Resistance Test Key WARNING 500V ON TEST LEADS TX125 User Manual Page 19 of 76 5 2 Power On Off Sequence The Controller is switched on by inserting the Line 1 test lead and pressing the key It is manually switched off by removing the Line 1 test lead It automatically powers off approximately 2 minutes after the end of the last test or key press The Controller will not automatically power off when in PC Connect Mode After Power On the following message is briefly displayed Teletech TX125C Software Ver xx where xx is the software revision The display changes briefly to The battery is checked and its state is indicated briefly as BATTERY IS nnnn Where nnnn is either HIGH GOOD LOW or FLAT Caution Replace batteries when the display shows FLAT TX125 User Manual Page 20 of 76 If the Controller has been set to an address other than A the following message is briefly displayed ADDRESS n Where n is either B or C The display then toggles between the following two states until a key is pressed It is assumed the last test before power off was VIEW STORE Main Menu display is MAIN MENU Y VIEW STORE gt Date and time display is 26 11 01 12 06 VIEW STORE Ei When a key is pressed the display changes to MAIN MENU ta VIEW STORE gt The display stays in this state until a ke
15. OSS Range Resolution Send Level Impedance LINE BALANCE 0 to 60dB 0 1dB 0dBm 10002 100 1200 1352 LONGITUDINAL CONVERSION LOSS Range Resolution Source LOOP RESISTANCE Range Resolution Current Source INSULATION RESISTANCE Tests Range Resolution Source Voltage Duration TX125 User Manual 45dB to 75dB 1dB 1Vrms 3kHz sinusoidal 0 to 3 0000 1Q 1mA 5V max A B A GND B GND 0 to 200MQ IMQ 500V 10 between 1MQ and gt 200MQ 10sec x 3 Page 72 of 76 Accuracy Loss Crosstalk Balance 300Hz to 2MHz 50Hz to 299Hz Other Voltage DC Voltage AC Loop Resistance Insulation Resistance Store Size Remote Physical Dimensions Power Supply Internal Battery Battery Life Controller Physical Dimensions Battery Battery Life Probe Physical Dimensions Battery Battery Life Environmental Operating Temperature Ingress Protection TX125 User Manual 1dB 3dB 1 2 1 10 22 1MQ 16K bytes is allocated to the Sequences and Results Store Typically 100 s of results can be stored with dozens of tests When full the Store over writes the oldest results first 216 x 100 x 40 mm 48v exchange battery or internal battery 9 volt alkaline Typically 120 hours 220 x 100 x 40 mm 9 volt alkaline Typically 40 hours 163 x 33 x 23 mm 9 volt alkaline Typically 150 hours 0 to 50 C IP54 Page 73 of 76 Appendix E Order Codes Digital Line Test
16. Set TX125 comprising 1 x TX125 Remote 1 x TX125 Controller 1 x TX125 Probe 1 x 1m Remote Alligator Clip Test Lead Set 1 x 1m Controller Alligator Clip Test Lead Set 1 x Soft Carry Case 1 x User Manual TX125 Remote 125TX TX125 Controller 125RX TX125 Probe 125PR TX125 Soft Carry Case 125 SCC Im Remote Alligator Clip Test Lead Set 125 10GP Im Remote Siemens Series 71 Test Lead Set 125 1081 Im Remote Siemens Series 2000 Test Lead Set 125 10S2 1m Remote Siemens Series 5000 Test Lead Set 125 10S3 3m Remote MDF Battery Jack Power Lead Set 125 10PL 1m Controller Alligator Clip Test Lead Set 125 12 1m Controller Krone Test Lead Set 125 12K2 Probe Earphone EPC User Manual 125 41 TX125 User Manual Page 74 of 76 TX125 User Manual Page 75 of 76 Teletech Pty Ltd 61 Betula Avenue Vermont Victoria 3133 Australia Telephone Fax Email Internet 61 3 9873 2777 61 3 9873 5902 gen teletech com au www teletech com au TX125 User Manual June2002 Part Number 125 41
17. TN12 and AUTO Use the and keys to step through the available impedances Pressing the key will go back to the previous selection display When the required impedance is set press the key to start the measurements The display sequences through the following two displays until all frequencies have been cycled through nnnndB loss lt gt 246 8kHz 1000 Where nnnn is the Loss It is typically displayed as 26 3 The last result remains on the display until a blue key is pressed or the unit powers off TX125 User Manual Page 43 of 76 5 15 Crosstalk Crosstalk is measured by placing a signal of known level on a pair adjacent to the PUT and then measuring the signal level on the PUT Either Far End crosstalk FEXT or Near End crosstalk NEXT is measured at one or a series of frequencies on the PUT The operator must specify the Near End or Far End the first lowest frequency the last highest frequency the number of steps and the impedance Remote Controller FEXT PUT F Term E lt y A Exchange o Line fi Term ag 9000hm 50Hz 2MHz Term Remote Controller NEXT PUT z Term E lt 4 A Exchange U o Line Term _ 9000hm Term O 50Hz 2MHz NA Sl To run Crosstalk go to the Main Menu and use the and keys to locate the menu item CROSSTALK
18. TX125 User Manual Teletech TX125 User Manual Page 2 of 76 TX125 User Manual Teletech TX125 User Manual Page 3 of 76 TX125 User Manual Published by Teletech Pty Ltd Copyright Teletech 2002 All rights reserved TX125 User Manual Page 4 of 76 Contents 1 INtFOUCHION EE 7 2 Safety IMPOrmation E 7 3 General DESchiptlOn 7 ageet heel teehee EE 11 3 1 Measurements and Functions non cnn nn nana 11 3 2 ROMO iii ee a tees a tab 12 3 3 COntrollefiic cn cee Ae eae Beale el ode 13 3 4 PODES ii E a oa seen ae Pio 13 4 NN ue EE 14 AS EE 14 4 2 POWEP e DEE 14 AS MESTRER EEN 16 4 4 Test Lead Connections erisir nenon ai n 16 4 5 48 Volt Power Operation ccccccccseececeeeeeeeseeeeeaeeeeeeeeetennaees 16 46 Sleep Modep entgeet eee eege e Ae 17 4 7 Remote Operating Modes A 17 Ali POWER OM tsetse tt EEN 17 Asis NDT ONG EE 17 Aids pl 18 4 7 4 Remote Display Giates A 18 5 The Controller iii th ee da Bechet eateries 19 BAZ TEEN 19 5 2 Power On Off Sequence coccccococonococccccccocononnononnnnnncnnnnnnennnnnnnnnnanns 20 5 3 Controller Battery Check 22 5 4 Controller Address circa Acct diet ege EEN 22 AT EE 22 5 6 Connecting to the PUT 0000 cece drain karrete 23 5 7 Controller User Interface 24 5 7 1 Menu Concepts u ssssseeeereerr ener 24 6 7 2 SA ii inari E i eia arrita 25 5 7 3 Terminating Tests eccoir ei arie 25 5 7 4 Controller MenUS nanendra inaran aia 25 5
19. and Controller together with their Blue leads Go to the Main Menu and use the and keys to find the menu item SEQUENCES The display shows MAIN MENU M SEQUENCES y Press the key to enter the Sequence Menu system Use the and keys to step through the available sequences to locate SELF TEST The display shows nn mm T O nc T Hz mo om 4M gt y To start the sequence press the key The display changes to Must have remote connected Then each of the tests is executed If all tests pass the display shows E E TEST NCE mn LF E QUENC PASSED TX125 User Manual Page 68 of 76 If any test fails the failing test will be displayed in View Store mode The display remains in this state until a key is pressed or the Controller powers off The Self Test Sequence consists of the following tests Test Condition Limit Loss Test 820Hz 600Q 0 2dB Loss Test 3kHz 600Q 0 2dB Loss Test 20kHz 100Q 0 5dB Loss Test 100kHz 1000 0 5dB Loss Test 1MHz 100Q 0 5dB Loop Test 20 TX125 User Manual Page 69 of 76 Appendix C Troubleshooting CONTROLLER FAULT ACTION No display e Check that a correct test lead Grey plug is plugged in Press key Replace battery Does not respond to any key Return to supplier for presses repair Remote does not respond but Check that Controller line is known to be good address is set the same as Remote address Check that the R
20. ble under test can support high frequency systems such as Pair Gain ISDN and xDSL Line performance is determined by injecting known signals and measuring the effect of the line on them 2 Safety Information Safe Working Practices Review the safety information and adhere to the safe working practices described in this manual and elsewhere Protection may be impaired if the instruments are used for purposes other than described in this manual TX125 User Manual Page 7 of 76 In this manual WARNING identifies conditions and actions that pose hazards to the user CAUTION identifies conditions and actions that may damage the instrument or the equipment under test The symbols used on the instrument and in this manual are Safety Information Refer to Manual Conforms to European Union Directives Earth Ground Table 1 Symbols TX125 User Manual Page 8 of 76 2 1 1 1 1 Warnings and Precautions VON To avoid possible electric shock or personal injury and to avoid possible damage to the instrument or to the equipment under test adhere to the following practices This equipment is to be used by trained operators only Use caution when using this equipment Voltages in excess of 30Vac or 42Vpeak or 60Vdc may be present on lines being tested These voltages pose a potential shock hazard Before using the equipment inspect the case Do not use the equipment if it is damaged Look for cracks in the case or missing
21. currently set option TX125 User Manual Page 58 of 76 5 20 2 Set Date And Time Before setting the date and time make sure the correct date format dd mm yy or mm dd yy is selected To set the date and time go to the Setup Menu and use the and keys to find the menu item SET DATE TIME The display shows Press the key to start The display changes to TIME SET RV 29 11 02 12 28 gt The cursor position is indicated by a flashing digit Use the and keys to move the cursor to the digit to be changed Then use the and keys to set it to the desired value To abandon the changes and exit press the key repeatedly To apply the changes press the key when the cursor is on the right most digit TX125 User Manual Page 59 of 76 5 20 3 Set Auto Termination Auto termination allows the TX125 to determine the line termination based on the test frequency The user must specify the two impedances to be used and the change over frequency Test results are always written to the store with the actual impedance used never AUTO To set the auto termination go to the Setup Menu and use the and keys to find the menu item SET AUTO TERM The display shows SETUP MENU ny SET AUTO TERM gt Press the key to start The display changes to lo freq term NY tttt gt Where tttt represents the termination impedance It has values of 1000 1209 1350 6000 9000 and TN12 Use the and keys to step through the available
22. dBm 1000 sinusoidal signal is placed on the PUT by the Remote The Controller measures the received level and calculates the Insertion Loss Any available termination may be selected Controller Remote P U T Term F gt mo e JU Exchange Line Q 50Hz 2MHz Term i y e 9000hm Beem To run the Multiple Frequency Loss test go to the Main Menu and use the and keys to locate the menu item MULTI FREQ LOSS The display shows MAIN MENU ny ULTI FREQ LOSS gt Press the key to configure the test TX125 User Manual Page 40 of 76 The display changes to first freq Ver fffffmHz gt Where fffff is the frequency last used eg 50 0 Hz m is the frequency multiplier e g k or M To accept the frequency shown press the key To change the frequency press the key and then the and keys to move the cursor which is indicated by a flashing character over the desired digit and use the and keys to change the value of the digit When the frequency is set as desired press the key repeatedly to bring the cursor to the character immediately before the H character and then press it once more Note The and auto repeat if held pressed Pressing the key repeatedly will get back to the previous selection display The display changes to last freq Ver 50 0 fffffmHz Where fffff is the frequency last used eg 555 5kHz To accept that freque
23. dicated by a flashing character over the desired digit and use the and keys to change the value of the digit When the frequency is set as desired press the key repeatedly to bring the cursor to the character immediately before the H and then press it once more Note The and auto repeat if held pressed Pressing the key repeatedly will get back to the previous selection display The display changes to freq steps dk nn steps y TX125 User Manual Page 46 of 76 Where nn is an estimation the Controller makes for the number of frequency steps It is based on the first and last frequencies and the step coarseness used last time To accept the steps as shown press the key Use the and keys to select more of less steps and then press the key to accept the setting and move to the next stage Note The and auto repeat if held pressed Pressing the key will go back to the previous selection display The display changes to LOG TO STORE y NO gt Use wa and keys to select YES or NO Pressing the key will go back to the previous selection display Press the key to go the final configuration step The display changes to choose term AN 0000 gt TX125 User Manual Page 47 of 76 Where 000 represents the termination impedance last selected It has values of 100 120 135 600 900 TN12 and AUTO Use the and keys to step through the available impedances Pressing the key will go back to the previous
24. e and keys to move the cursor which is indicated by a flashing character over the desired digit and use the and keys to change the value of the digit When the frequency is set as desired press the key repeatedly to bring the cursor to the character immediately before the H character and then press it once more Note The and auto repeat if held pressed Pressing the key repeatedly will get back to the previous selection display The display changes to choose term ny 121 6kHz 00082 gt Where 000 represents the termination impedance last selected e g 135 It has values of 100 120 135 600 900 TN12 and AUTO Use the and keys to step through the available impedances Pressing the key will go back to the frequency selection display When the required impedance is selected press the key to perform the test TX125 User Manual Page 38 of 76 The display changes to loss testing 121 6kHz 135Q When the measurement has been made the display changes to where nnn is the loss value It has two significant digits plus a decimal point eg 26 3 The display will remain in this state until a blue key is pressed or the unit powers off TX125 User Manual Page 39 of 76 5 14 Multiple Frequency Loss This measures the loss of the PUT at a series of frequencies The user must specify the first lowest frequency the last highest frequency the number of steps and the termination impedance A 10dBm 600Q or 0
25. emote is connected correctly Red leads to exchange Blue leads to PUT Check that jumpers between exchange line and PUT are removed CAL CHECK fails e Check that the Remote blue test leads are clipped to the Controller blue test leads Try Remote with a different Controller and Controller with a different Remote to determine which unit is faulty Return faulty unit to supplier for repair TX125 User Manual Page 70 of 76 REMOTE FAULT ACTION No display e Check that a correct test lead Blue plug is plugged in Replace battery Does not respond to pressing Return to supplier for key repair Does not respond to pressing Return to supplier for key repair Does not reset to Return to supplier for EXCH CONN mode when test repair lead is removed and re inserted PROBE FAULT ACTION No ID tone heard e Check that Remote display shows the ID Tone message Try the Probe with no line connected to Remote Replace battery TX125 User Manual Page 71 of 76 Appendix D DC VOLTAGE OPEN test EXCH CONN test Range Resolution Input Impedance AC VOLTAGE True RMS OPEN test Range Resolution Input Impedance Technical Specifications A B A GND B GND A B 400V to 400V 1V 200kQ A B A GND B GND zero to 275V 1V 200kQ LOW FREQUENCY INSERTION LOSS Range Resolution Send Level Impedance 0 to 20dB 0 1dB 10dBm 6000 600Q 9000 TN12 HIGH FREQUENCY INSERTION L
26. he Remote end and will stay open until set otherwise Other test equipment may now be used on the open circuit line and the Controller may be disconnected Remote Controller Exchange Line Green Wire To open circuit the PUT at the Remote press the The display changes to LINE ISOLATION PROCESSING This message is displayed while the configuration is set up TX125 User Manual Page 29 of 76 The AC voltages on A B A G and B G are measured and progressively displayed ACvolts AB nnnn AG nnnn BG nnnn Where nnnn is the AC Line voltage Voltages are shown with one decimal place up to 99 9 volts Then with no decimal places up to 275 volts and then as gt 275V for higher voltages The DC voltages on A B A G and B G are measured and progressively displayed DCvolts AB nnnn AG nnnn BG nnnn Where nnnn is the DC voltage They are shown with one decimal place up to 99 9 volts then with no decimal places up to 400 volts If greater than 400 volts gt 400 is displayed If more negative than 400 volts lt 400 is displayed Two seconds later the display changes to LINE ISOLATED USE EXT INSTR The Controller now sequences through the AC and DC measurements again TX125 User Manual Page 30 of 76 Insulation Resistance The Controller measures three Insulation Resistances A B A G and B G using a 500V DC source Each measurement is done after a soak period to a
27. lied as standard with the following test lead sets Line 1 Blue coloured multi pin connector with two blue wires two red wires and a white wire All wires are 1 metre long and are terminated with alligator clips Line 2 Blue coloured multi pin connector with two yellow wires All wires are 1 metre long and are terminated with alligator clips The Line 1 Test lead is used to turn the Remote on and off Other test lead options are available and are listed in Appendix E Except with the case of the alligator clip lead the connections to the pair under test are made by inserting a polarised isolating plug into a connector block Test Lead Connections At the Exchange MDF remove the jumpers between exchange side and customer side Connect the red leads to the exchange side and the blue leads to the customer side Connections are not polarity sensitive 48 Volt Power Operation When operating in an Exchange the Remote may be powered from the exchange battery using the optional power lead See Appendix E TX125 User Manual Page 16 of 76 4 6 Sleep Mode When the Remote is idle not doing a test or generating an ID tone battery life is extended by forcing some circuits into a low power sleep mode The display stays alive Sleep mode is activated approximately ten seconds after power on a keypad key release the completion of a test or the reception of a valid message from the Controller 4 7 Remote Operating Modes 4 7
28. llow weak insulation to fail Remote Controller O O Exchange Line O O 9000hm Ee Green Wire To start the Insulation Resistance IR test press the key The display changes to 500V IR PROCESSING while the configuration is being set up Provided no foreign battery is detected the display sequences through the following three states until the key is pressed again TX125 User Manual Page 31 of 76 PRESS lt IR gt TO START NOTE To abort the test press any Blue key Pressing the key again changes the display to 500 volts is impressed on the line The time remaining before the IR AB measurement is made is shown After the measurement is made the display changes to IR MQ AB nnnn Where nnnn is the insulation resistance in megohms Values are with one decimal place between 1 0 and 99 9 megohm with no decimal places between 100 and 200 megohms lt 1 if less than 1 megohm gt 200 if greater than 200 megohm TX125 User Manual Page 32 of 76 After two seconds the display changes to 500V IR A G 10 SEC REMAINING while IR AG is measured The measured value is displayed for two seconds IR MQ AB nnnn while IR BG is measured Then finally to IR MQ AB nnnn G nnnn BG nnnn gt This display remains until a key is pressed or the Controller powers off At the end of the last measurement the 500V source is removed fro
29. m the line and the line is discharged If a foreign battery is detected on the line the display changes to BATTERY NOT DONE TX125 User Manual Page 33 of 76 This display remains until any blue key is pressed or the unit powers off WARNING During this test there is 5 00VDC present on the test leads and on the PUT The high voltage can be removed at any time by pressing any BLUE key WARNING Do not disconnect the test leads from the PUT during an IR test as this may leave the line in a charged state capable of causing an electric shock The TX125 discharges the line at the completion of the IR test TX125 User Manual Page 34 of 76 5 12 Line Balance The PUT is isolated from the exchange line and opened at the Remote The Controller measures the LCL of the PUT at a frequency of 3kHz An LCL better than 57dB indicates a well balanced line less than 51dB an unbalanced line and if between 52dB and 57dB a reasonably balanced line Controller e A skHz Remote P U T a gt F Exchange Line A O I 9000hm White Wire Green Wire To start the Line Balance test navigate to the Main Menu and use the and keys to locate the menu item LINE BALANCE The display shows Press the key to enter the test The display changes to LINE BA L E PROCESS ANC ING This message is displayed while the configuration is set up and
30. must be connected to a good earth if the instrument is to return meaningful results for the Line Balance Open and IR tests TX125 User Manual Page 23 of 76 5 7 Controller User Interface The four most commonly used tests Exchange Connect Loop Open and IR have a dedicated key to invoke them The remaining tests require the user to select operation via a menu system 5 7 1 Menu Concepts The menu system is navigated using the four arrow keys 2 Le Jana 3 The position in the menu system is given by the state of the display For example Whenever the top line shows the name of a menu such as MAIN MENU or VIEW STORE the bottom line shows one item from that menu In general the four keys have the following functions e The key is used to move into a test set up to select a value to alter to accept the chosen value or option s and to start a test e The key is used to either select a value to alter or to back out of a test or setup e The and arrow keys are used to move through menus and menu options and to increment and decrement values TX125 User Manual Page 24 of 76 5 7 2 Blue Keys A Blue key is either coloured blue or is the IR key Blue keys operate the Menu system The only key that is not a Blue key is the key 5 7 3 Terminating Tests Any Blue key press terminates a running test and returns the display to the Main Menu When a test has finished running and the displa
31. ncy as shown press the key To change the frequency use the key and then the and keys to move the cursor which is indicated by a flashing character over the desired digit and use the and keys to change the value of the digit TX125 User Manual Page 41 of 76 When the frequency is set as desired press the key repeatedly to bring the cursor to the character immediately before the H and then press it once more Note The and auto repeat if held pressed Pressing the key repeatedly will eventually get you back to the previous selection display The display changes to freq steps ny nn steps gt Where nn is an estimation the Controller makes for the number of frequency steps It is based on the first and last frequencies and the step coarseness used last time To accept the steps as shown press the key Use the and keys to select more of less steps and then press the key to accept the setting and move to the next stage Note The me auto repeat if held pressed Pressing the key will go back to the previous selection display The display changes to LOG TO STORE tv NO gt TX125 User Manual Page 42 of 76 Use wa and keys to select YES or NO Pressing the key will go back to the previous selection display Press the key to the final configuration step The display changes to choose term ny 0000 gt Where 000 represents the termination impedance last selected It has values of 100 120 135 600 900
32. ng reading To View the Store go to the Main Menu and use the and keys to find the menu item VIEW STORE The display shows MAIN MENU ny VIEW STORE gt Press the key to begin the View Store process TX125 User Manual Page 52 of 76 The display changes to lt IEW AVver gt EXITe gt tttttttttt y Where tt ttt is the name of one of the tests The bottom line of the display is now a window through which the stored data may be viewed The key moves back through older tests one test per press The key moves forward in time one test per press The key moves the window downwards through the lines of data for this measurement The key moves the window upwards through the lines of data for this measurement The unit will beep if the user tries to move down beyond the last line of data for a measurement up beyond the top line of a measurement left beyond the oldest measurement in the Store or right beyond the most recent measurement in the Store Pressing either the or keys when deep in the test data moves the window to a place in the next test that is more useful for the operator An example is the easiest way to show how the View Store works A typical store entry might contain these lines of information which can be viewed one at a time VIEW tver EXITe gt LOSS TEST M TX125 User Manual Page 53 of 76 Press the key to see the next line of the stored result Press the ke
33. selection display When the required impedance is set press the key to start the measurements The display sequences through the following two typical states until all frequencies have been measured FEXT testing 246 8kHz 100Q nnnndB FEXT lt gt 246 8kHz 1000 where nnnn is Crosstalk level The last result remains on the display until a blue key is pressed or the unit powers off TX125 User Manual Page 48 of 76 5 16 Controller Address The address in the Controller is changed to address of the Remote that is to be controlled To select the address go to the Main Menu and use the and keys to locate the menu item ADDR The display shows MAIN MENU ny ADDR gt Press to enter the ADDR function The display changes to ADDRESS ny C gt The Controller Address is shown on the second line Press or to move between A B or C and then to accept the currently viewed address Pressing backs out without changing the set address TX125 User Manual Page 49 of 76 5 17 Pair Identify Pair Identify operation may be selected from the Remote or from the Controller A distinctive ID tone is placed on the PUT by the Remote The ID Tone is detected by the Probe Remote P U T 6000hm t EH O Probe Exchange bn Kg Leg 9000hm To select Pair Identify go to the Main Menu and use the and keys to find the menu item PAIR ID The display shows MAIN MENU ny P
34. ts with limits in the Sequence the display reverts to n AIN MENU ny EQUENCES gt unless Pair ID was the last test in the Sequence and the PAIR IDENTIFY display is shown NOTE For safety issues IR tests MUST be manually started TX125 User Manual Page 56 of 76 5 20 Setup The following functions are available in the Set Up Menu e PC Connection e Set Auto Term e Set Date Time e Date Format e Serial Number To access the Set Up Menu go to the Main Menu and use the and keys to find the menu item SETUP MENU The display shows MENU ny y Press the key to enter the Set Up Menu The display will then show SETUP MENU ny tttttttttttt gt Where tt ttt is the name of one of the set up functions SET DATE TIME SET AUTO TERM DATE FORMAT PC CONNECTION SERIAL NUMBER Each of these functions is described below in more detail TX125 User Manual Page 57 of 76 5 20 1 Date Format The date format style can be set to dd mm yy or mm dd yy To select the date format go to the Setup Menu and use the and keys to find the menu item DATE FORMAT The display shows SETUP MENU ny DATE FORMAT gt Press the key to start The display changes to DATE FORMAT Av dd mm y gt Use the and keys to toggle between the two available formats dd mm yy and mm dd yy When the desired option is displayed press the key to accept it Pressing the key backs out of the set up without changing the
35. y is showing the results any Blue key press returns the display to the Main Menu 5 7 4 Controller Menus The Controller has four menu systems Main Sequences Set Up Menu Menu Menu One Freq Loss Sequence 1 PC Connection Multi Freq Loss Sequence 2 Serial Number Line Balance Sequence 3 Set Date Time Crosstalk a Set Auto Term ADDR Sequence N Date Formats Pair Id View Store Set Up Sequences Store Menu example only other Loss Balance IR Loop FEXT test date time date time date time date time date time results freq amp term reading reading reading freq amp term reading reading reading TX125 User Manual Page 25 of 76 5 8 Exchange Connect The PUT is connected through to the Exchange The Controller measures the DC Line Voltage A leg B leg Other test equipment may be used on the PUT and the Controller may be disconnected Remote Controller O Q Exchange Line O To Exchange Connect press the EXCH CONN key The display changes to EXCHANGE CONNECT PROCESSING This message is displayed while the configuration is set up The display then changes to indicate the DC voltage on the PUT EXCHANGE CONNECT LINE VOLTS 49 8 The voltage is shown with one decimal place up to 99 9 then with no decimal places up to 400 then as gt 400V or lt 400V TX125 User Manual Page 26 of 76 5 9
36. y is pressed or the Controller powers off TX125 User Manual Page 21 of 76 5 3 5 4 5 5 Controller Battery Check The Controller checks the state of it s and the Remote s battery at the end of every test If the Remote s battery is low or flat the following message is displayed REMOTE BATTERY IS nnnn Where nnnn is either LOW or FLAT Press any blue coloured key to clear this message Controller Address The Controller s address must be the same as that of the Remote it is controlling 1 e A B or C The Controller remembers the address it was last set to Test Leads Controllers are supplied as standard with the following test lead sets Line 1 Grey coloured multi pin connector with two blue wires and a green wire All wires are 1 metre long and are terminated with alligator clips Line 2 Grey coloured multi pin connector with two yellow wires Each wire is 1 metre long and is terminated with alligator clips Test lead options are listed in Appendix E Except in the case of the alligator clip lead the connections to the pair under test are made by inserting a polarised isolating plug into a connector block TX125 User Manual Page 22 of 76 5 6 Connecting to the PUT Isolate the Pair Under Test PUT from any line or equipment on the customer side and connect the blue leads to the PUT and the green lead to ground The blue lead connections are not polarity sensitive Caution The green lead
37. y to see the next line of the stored result VIEW Av EXIT 50 00 Hz 1000 Press the key to see the last line of the stored result VIEW Aver gt EXITe gt 1 6dB loss EXITING from VIEW STORE Press the keys simultaneously TX125 User Manual Page 54 of 76 5 19 Sequences Sequences are pre defined sets of tests These are created and uploaded to the Controller using the TX125PCI Application Sequences are identified by their name and many Sequences may be loaded in the Controller simultaneously Except for IR tests no user intervention is required when Sequences are run A running Sequence can be stopped at any time by pressing any Blue key To enter the Sequence Menu go to the Main Menu and use the and keys to find the menu item SEQUENCES The display shows N zZ AIN MENU EQUENCES y Press the key to enter the Sequence menu The display changes to SEQUENCE MENU yv nnonnnannnnnnnnnn gt Where nn nnn is the name of one of the Sequences TX125 User Manual Page 55 of 76 Use the and keys to select the desired Sequence Press the key to start the Sequence The display may show a message that is embedded in the Sequence before the first test is run Do not press any key during this time When a Sequence which includes limits is complete the display changes to A BONZA SET ny PASSED gt where the name of the Sequence is A BONZA SET If there are not tes
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