Alcatel Canada 24T07A01D22D 7390 24 GHz Co-Pol RT User Manual NT Manual pages 51 to 75

Alcatel Canada Inc 7390 24 GHz Co-Pol RT NT Manual pages 51 to 75

NT Manual pages 51 to 75

3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 51/ 11452* Available the first quater 2001Can be terminated with 75 Ω load for 4 NT assembly.Figure 38 – "4 NT" assembly with active splitterFigure 39 – "8 NT" assembly with active splitter20 to 50 meters of standard cables or70 to 140 meters of low-loss cablessplitterrepeatersplitterrepeater75 Ωsplitter splitter cablesNT5 NT6 NT7NT8RTACTIVE SPLITTER< 30 cm20 to 50 meters of standard cables or70 to 140 meters of low-loss cablessplittersplitterrepeaterACTIVE SPLITTERsplittercablesRTNT1 NT2 NT3NT4NT5 NT6 NT7NT8splittersplittersplittersplitterrepeaterrepeaterrepeater< 30 cm
52/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0152PAGE INTENTIONALLY LEFT BLANK
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 53/ 114784 Commissioning the 7390 TS Terminal Station4.1 PurposeThe purpose of this task is to carry out:–site adjustment of the RT unit (also called RT or RT radio),–initialization and configuration of the RT unit and NT unit parameters,–checking and validation of the installed parameters before rendering the equipment operational.4.2 Commissioning the RT unit4.2.1 Equipment requiredTo configure the parameters and carry out site adjustment of the RT unit, the following equipment isrequired:–the RT unit,–the E-RIT tool (Radio Installation Tool) cf. § 4.2.2 E-RIT Tool;RIT software installation (Ref. : 3CC11826 Axxx):•DLL software, Driver I2C Win95/98 NT,•Installation kit RT 7390WW (3CC10786Axxx 02),•Setup.–one tool cable set (see Figure 41 – RT «N» connector configuration setup diagram and Figure 43 – RT antenna fine alignment assembly diagram),–one audio-head set (see Figure 43 – RT antenna fine alignment assembly diagram),–one No.5 Allen key for M6 screw for an integrated antenna–one No. 8 Allen key for M10 screw and one 16/17 flat wrench for non integrated antenna,–the RT installation and programming software pre-installed on a portable PC,–CD-ROM containing the data pre-recorded by the network operator,–a PC fitted with the RT unit initialization and programming software; the PC should have the fol-lowing minimum characteristics:•Microprocessor: 500 MHz Pentium III,•RAM Memory 64 MB,•Hard disk: 4 GB,•Monitor SVGA (800 x 600),•Windows 9x /NT4. (Service pack 3 or above).
54/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 01784.2.2 E-RIT ToolThe E-RIT is used (only if RT «N»):–as an interface between the PC and the RT unit: it receives the information necessary to the ini-tialization and programming of the RT from the PC and transmits it to the RT unit;–to implement optimal alignment of the antenna facing the Base Station. This function is providedby the Received Signal Level control system (visual and/or audible) of the E-RIT.The E-RIT tool is equipped with a sheath to protect it from impacts and allowing the operator hands-freeoperation.Figure 40 – RIT toolNote: Let the E-RIT warm up (-10/+55 °C range) after it storage in extreme temperatures (-40/+70 °C).Rear view of E-RITFront view of E-RITSensitivitypotentiometerField Gaugefor received levelAlarm indicator On/Off switch On line indicatorPC and headsetcable connectorReceiving indicatoris off in case field isexceeded: level >-10dbmN connector toNTBNO connectorto RT «N» unit N connector toRT unitonly
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 55/ 114784.2.3 Site configuration and adjustment procedures4.2.3.1 Configuration setting of the 7390RT parametersTo carry out RT radio programming, implement FIRST the assembly shown in Figure 41 – RT «N»connector configuration setup diagram.Note: The radio configuration requires the information featuring in the installation instructions (seeAppendix 1 – 7390 TS installation sheet), duly completed in advance. This will be used to definethe parameters required by the configuration application.Note: It is recommended that this task be carried out indoors. The use of the portable PC in inclementweather conditions (rain, snow, etc.) is not advisable.Note: Safety recommendations listed in section 1.3 being followed, it is not necessary to establish spe-cial grounding connection for the NT casing. Therefore, it is performed via the 3-wire mains cord.FOR THE ASSEMBLIES DESCRIBED IN THE FOLLOWING PARAGRAPHS, CONNECT THE NT TO THE MAINS SUPPLY LAST OF ALL, ONCE ALL THEOTHER CONNECTIONS HAVE BEEN MADE BEFORE.
56/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0178A ) RT «N» connectorFigure 41 – RT «N» connector configuration setup diagramStages1. Connect the cables of the configuration tools (cables and tools delivered with the equipment):•between the RT unit and the E-RIT tool: the RT/E-RIT link coaxial cable ("N" type connectorsat both ends (75Ω),•between the RT unit and the E-RIT tool: the data transfer bus («N» type connectors at bothends),•between the portable PC and the E-RIT tool,•between the E-RIT tool and the NT: coaxial cable ("N" type connector at the E-RIT (75Ω) and"F" type connector at the NT),•between the NT and the mains power supply: mains connection cable (to connect last).2. Power-up the assembly:•power-up the NT,•power-up the PC,•power-up the E-RIT tool.3. Run the radio configuration application by clicking on its "kit-install.exe" icon on the PC Windowsdesktop.To run the kit_install.exe application from the Windows desktop, double-click on the iconshown opposite. The first configuration screen then appears.Note: The user of the installation software must be familiar with the operation of software in the Win-dows 95, 98 or NT environments.RT/E-RIT link (tool cable)I2C bus (tool cable)Coaxial cable (tool cable) or "site" cablemains 85 - 264 VACNTE-RIT tool RT «N»E-RIT/PC link(tool cable)3CC11056Axxx47 - 63 HZ«N» Plug Portable computer
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 57/ 11478B) RT «F» connectorFigure 42 – RT «F» connector configuration setup diagramStages1. Connect the cables of the configuration tools (cables and tools delivered with the equipment):•between the RT unit and the E-RIT tool: the RT/RIT link coaxial cable ("F" type connectors atboth ends (75Ω),•between the portable PC and the E-RIT tool,•between the E-RIT tool and the NT: coaxial cable ("N" type connector at the E-RIT (75Ω) and"F" type connector at the NT),•between the NT and the mains power supply: mains connection cable (to connect last),•between the E-RIT/PC link and RT «F» connector the data transfer bus (RS232) with BR2 /DB9 cable.2. Power-up the assembly:•power-up the NT,•power-up the PC,•power-up the E-RIT tool.3. Run the radio configuration application by clicking on its "kit-install.exe" icon on the PC Windowsdesktop.To run the kit_install.exe application from the Windows desktop, double-click on the iconshown opposite. The first configuration screen then appears.Note: The user of the installation software must be familiar with the operation of software in the Win-dows 95, 98 or NT environments.RT/E-RIT link (tool cable)Coaxial cable (tool cable) or "site" cablemains 85 - 264 VACNTE-RIT tool RT «F»E-RIT/PC link(tool cable)3CC11056Axxx47 - 63 HZ«F» PlugRS232Portable computerDB9BR2
58/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 01784.2.3.2 RT configuration (maximum distance according to a NT-RBS)The steps of RT configuration are:–geographic area,–RF gain correctio calculation,–cable gain correction for,•mono NT software ref.:1.1.2d,•two NT software ref.:1.0.9a,•4/8 NT software ref.:1.1.2d.Geographic areaOnce the configuration application has been run, the radio parameters must be supplied.The radio configuration parameters can be supplied to the software in two different ways:•in the form of a configuration file stored on an IT medium (floppy disk, CD-ROM or other); theparameters obtained like this may, if necessary, be subsequently modified,•by direct input of parameters via configuration screens.In the case of data saved in a file, insert the IT medium in the PC and transfer the contents of the file tothe installation software.Click here to go to the next screenSelect language and display theClick here to define theconfiguration file pathSavesoftware versionOnly for software ref.: 1.1.2d
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 59/ 11478In the case of the parameters being directly entered, follow the RT radio programming stages describedbelow:•Calculate the maximum RT-RBS distance (cf. A),•Calculate the gain corrections (cf. B),Once the parameters have been entered, the configuration must be sent to the RT radio unit.Note: To ensure optimum radio link quality, define with care the parameter values in compliance withthe real environmental characteristics.RF gain correction calculationNote: does not depend on RT / NT topologyTo define the value of the parameters to be entered in the "Gain corrections calculation" screen, use theinstallation sheet (see Appendix 1 – 7390 TS installation sheet), complemented by the Radio Planning.The RT-RBS distance must be compatible with the value defined in the previous screen.As the software parameters are entered, the software carries out the gain correction calculations.If the parameters cannot be accepted, the background colors of the Rx and Tx gain connection windowschange to red. If the values are beyond the system capabilities, all the windows are emptied of theircontents and are grayed-out; it is then necessary to recommence the input starting with the first RT-RBSdistance parameter.For the RT-RBS distance, it must be to within the following margins:–100 m < D < 200 m, 20 m max. error–200 m < D < 400 m, 40 m max. error–400 m < D < 800 m, 80 m max. error–D > 800 m 100 m max. errorEnter the RT-RBS length Enter the estimated max.Enter the RBS antenna tilt Enter the nature ofAutomatic gaindifferential heightcorrection calculation any ObstaclesEnter the Differential height (to within 10%)
60/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0178Cable gain correctionFor the cable gain correction calculation, there are three possible scenarios depending on the installationtopology: Mono NT, two NTs or Multi NTs.1. Mono NT software ref.: 1.1.2dCable gain correction in the case of Mono NT, the screen appears as follows, once Mono NT hasbeen selected:The cable length indicated is the total length including the free part and the part imposed by the topology.The field in brackets on the screen is defined as follows:minimum value = N x 70 m (N number of repeater),maximum value = N+1 x 70 m (N number of repeater),The length adjustment is between 1 m and the maximum length of the first segment with respect to thecable selected (70 or 210 m).The software will calculate automatically with respect to the entire set of parameters the corrections tobe made.Click here to define theTotal cable length field Gain correction calculatedautomatically by the softwarenumber of repeaters (0,1 or 2)
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 61/ 114782. Two NT software ref.: 1.0.9aCable gain correction in the case of two NT: once the data presented in the Star screen is validated,the following screen appears:In the case of two-NT configuration, the following screen appears, once two-NT has been selected:This screen is used to define the installation topology. Depending on the topology, the total maximumlength (incorporating the imposed part and the free part) is displayed.Sending the configuration to the RT radio unitOnce the calculations have been made, click on the icon "data send" shown here, that is at the top ofthe Gain corrections calculation screen, for the values to be acknowledged by the RT.Select the cable typeAutomatic calculation ofEnter the cable length to within 1.5 mper segment, 5 m for the total length the cable gain correctionMaximum total lengthClick here to validateonce the topology hasbeen defined
62/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 01783. 4/8 NT software ref.: 1.1.2dCable gain correction in the case of multi NT: once the data presented in the Star screen is validated,the following screen appears:In the case of multi-NT configuration, the following screen appears, once multi-NT has been selected:This screen is used to define the installation topology. Depending on the topology, the total maximumlength (incorporating the imposed part and the free part) is displayed.Sending the configuration to the RT radio unitOnce the calculations have been made, click on the icon "data send" shown here, that is at the top ofthe Gain corrections calculation screen, for the values to be acknowledged by the RT.Select the cable typeAutomatic calculation ofEnter the cable length to within 1.5 mper segment, 5 m for the total length the cable gain correctionMaximum total lengthClick here to validateonce the topology hasbeen defined
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 63/ 114784.2.3.3 Margin measurement (software réf. 1.1.2d)Click on this icon to display the RIT IF Power screen.–Check that the «RIT IF Frequency» in the field is correct or adjust the frequency–In case of modification, click on the «Send» button to validate the modification–Check that the «Needed Margin» = Margin x, so that x is: •Distance (RT - RBS) / Distance max. (RT - RBS)–Check that the «Measured Margin» > «Needed Margin» field value in RIT IF Power screen (+/- 3 dB)–Check that Measured Margin is such that:•(-65 dBm) (standard) IF Power, •(-67 dBm) (specific) IF Power. Nota: E-Rit IF Power access is +/- 3 dB.4.2.3.4 Aligning the RT unit antenna1. PreparationNote: To carry out the following phases of the Terminal Station commissioning, the link Base Stationmust be operational and its antenna correctly oriented.–MontageThe following equipment is required for carrying out RT antenna alignment:•the RT unit,IMPORTANT NOTE FOR INTEGRATED ANTENNA: NEVER HANDLE THE RT UNIT BY ITS ANTENNA BUT BY THE BODY OF THE RT RADIO OR THE SUPPORT ARM
64/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0178•the E-RIT (Radio Installation Tool),•a NT,•an audio headset,•a No. 5 Allen key for M6 screw for integrated antenna,•a No. 8 Allen key for M10 screw and a 16/17 flat wrench for non integrated antenna,•the service cable kit.To carry out RT unit antenna alignment, implement the assembly shown in Figure 43 – RT antenna finealignment assembly diagram.Figure 43 – RT antenna fine alignment assembly diagramWARNING: DO NOT PERFORM SUCH ASSEMBLY IN STORMY CONDITIONS; THE EQUIPMENT METAL STRUCTURES MAY BE A TARGET FOR LIGHTNINGRT/E-RIT link cable (tool cable)"Site" coaxial cablemains 85 - 264 VAC47 - 63 HZNT modemE-RIT toolHeadsetE-RIT / Headset (tool cable) RT(link E-RIT/NT)
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 65/ 11478–Help for using the E-RIT•E-RIT tool received field indicator (represented in Figure 44 – Adjustment procedure usingthe E-RIT tool potentiometer): to the maximum received field corresponds a maximum vumeterpointer deviation; as soon as the pointer reaches its maximum stop, adjust the potentiometerto set the pointer back to its center position (these adjustments may be renewed).Figure 44 – Adjustment procedure using the E-RIT tool potentiometer •audio headset connected to the "service kit" cable: to the minimum received field correspondsa low frequency audio signal (headset's LF tone); to the maximum received field correspondsa high frequency audio signal.The received signal follows the curve below which comprises several maximum points called "lobes":Figure 45 – Main lobe and side lobes of the received signalNote: As the side lobes are rather close (4° to 5°) from the main lobe at a rather high level (-15 dB),searching the maximum received signal must be carried out carefully to make sure that pointingis effectively carried out considering the main lobe (see § Horizontal and vertical pointings).PotentiometerVumeter VumeterPotentiometer15 dBside lobesmain lobeVertical planeLobe cross-sectionHorizontal~±1.5 for every~±6 to ~-15 dB3 dB leveldeviationfrom the main lobeplane
66/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 01782. Pointing an integrated antennaFigure 46 – "azimuth" and "elevation" adjustment screw–Presets:•Using the Allen key, slightly untighten the "azimuth" and "elevation" screws so that the RTcan move easily (marks 1 and 2, Figure 46 – "azimuth" and "elevation" adjustment screw).•Horizontally direct the RT to the Base Station using a compass if necessary.–Horizontal and vertical pointings:Using the E-RIT tool and/or the audio headset (see section Help for using the E-RIT § 4.2.3.4 Ali-gning the RT unit antenna), perform the following adjustments:•Move the RT radio by performing horizontal scanning, until you find a maximum receptionlevel.Note: If no level is detected, check with the compass that the RT correctly points to the base station. Incase of failure check the installation (polarization, connections).•Carry out alignment with respect to the strongest signal. To do this, either:•observe the maximum field level on the E-RIT tool indicator shown in Figure 44 – Adjust-ment procedure using the E-RIT tool potentiometer,•or, evaluate the maximum field level using the audio headset connected to the service kitcable,•Using the Allen key, slightly tighten the "azimuth" screws (mark 1, Figure 46 – "azimuth" and"elevation" adjustment screw) before performing the vertical pointing, in order to maintain amaximum azimuth reception and make the two adjustments independent (H and V).•Provided that a maximum has effectively been detected during the previous pointing, severalcases are possible depending on the maximum position in the reception curve (see Figure 45– Main lobe and side lobes of the received signal).12
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 67/ 114783. Pointing a non integrated antennaFigure 47 – Pole mounting 1+0 9900UXI102–Presets:•Be sure that the three screws ¥ and the four screws ¦ are a bit slackened, just enough to allowmovement of the different parts of the pole mounting. These screws must not be too much slac-kened, otherwise, the fine-tuning of alignment will be imperfect. Use the 10 mm Allen key.•Horizontally direct the RT to the Base Station using a compass if necessary.–Horizontal and vertical pointings:Using the E-RIT tool and/or the audio headset (see section Help for using the E-RIT § 4.2.3.4 Ali-gning the RT unit antenna) , perform the following adjustments:•Move the RT radio by performing horizontal scanning, until you find a maximum receptionlevel.Note: If no level is detected, check with the compass that the RT correctly points to the base station. Incase of failure check the installation (polarization, connections).•Carry out alignment with respect to the strongest signal. To do this, either:•observe the maximum field level on the E-RIT tool indicator shown in Figure 44 – Adjust-ment procedure using the E-RIT tool potentiometer,•or, evaluate the maximum field level using the audio headset connected to the service kitcable,•with the azimutal turnbuckle ¨ and the 16 mm flat wrench, fine tune the azimutal setting,before performing the vertical pointing, in order to maintain a maximum azimut receptionand make the two adjustments independent (H and V),•with the vertical turnbuckle § and the 16 mm flat wrench, fine tune the elevation setting untilyou find a maximum reception level. Be aware that if the elevation angle is higher than +5ºor lower than -5º, it is necessary to remove completely one of the 2 screws fixing the anten-na support on the azimut support and insert it in the third hole accessible. See Appendix 6– Installation of the Terminal Station RT unit with a non integrated antenna.•Provided that a maximum has effectively been detected during the previous pointing, severalcases are possible depending on the maximum position in the reception curve (see Figure 45– Main lobe and side lobes of the received signal):AzimutalElevationGrounding connection3 screws elevation tightening124324 screws azimutal tighteningturnbuckleturnbuckle
68/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0178Note: The following cases are treated for the vertical scanning (site), they are also valid for the horizon-tal scanning (azimuth).Case 1 (Figure 48 – Vertical scanning: case 1): only one wide maximum is found throughout thevertical scanning. Thus the RT is aligned within the ± 6° deviation range corresponding to the side lobe.Then slightly move the RT horizontally (by less than 6°) to the BS.Perform again vertical scanning.Figure 48 – Vertical scanning: case 1Case 2 (Figure 49 – Vertical scanning: case 2): only two remote maxima have been found throughoutvertical scanning.Then adjust the vertical position so that the reception level is at the minimum between both maxima.Horizontally move the RT until the main lobe is found, as shown in Figure 49 – Vertical scanning: case2.Figure 49 – Vertical scanning: case 2Case 3 (Figure 50 – Vertical scanning: case 3): three maxima have been found throughout verticalscanning, including one maximum of higher level (main lobe).Then move the RT so that it matches the central maximum.Use the potentiometer to distinguish both maximum types by varying the received signal sensitivity andthus confirm that the pointing effectively corresponds to the main lobe (maximum of higher level).Slightly adjust the vertical and horizontal positions until the maximum main lobe level is reached.RT alignment with the base station is then correct.Figure 50 – Vertical scanning: case 3Only one maximum is found: the received signal curve followsone of the side lobes pointing to be continuedThe double arrow symbolizesthe vertical scanningTwo maxima are detected:the received signal curve followsboth side lobespointing to be continuedSchematization of the pointingto be performedThree maxima are detected:the received signal curve followsboth side-lobes and the main lobepointing to be adjusted to the maximumof the main lobe (point M)M
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 69/ 11478Note: If no maximum is detected throughout vertical scanning, it means that the horizontal receptionmaximum is lost, the horizontal position is not located within the ± 6° deviation range.Then horizontally move the RT to the BS so that a maximum is found and vertically scan againto find one of the 3 previously described cases.–End of pointingOnce alignment is completed:•For an integrated antenna, tighten the "azimuth" screws using the Allen key, then the "eleva-tion" screws (marks 1 and 2, Figure 46 – "azimuth" and "elevation" adjustment screw). •For a non integrated antenna, tighten the three screws ¥ and the four screws ¦ (Figure 47 –Pole mounting 1+0 9900UXI102). •Make sure the maximum reception signal is always found.•Completely lock the mechanical assembly preventing the RT radio assembly from misaligning4. Cabling according to standards–Remove the tools and cables used for the RT commissioning and adjustment.–On the Radio side, connect the RT/NT connection cable in accordance with the requirements in-dicated in § 3.6 Installation of the RT/NT link.–Screw up the stopper of catch BNO on the radio to allow the sealing of the radio.Make sure you observe the conditions of case 3 before performingthe following step to complete the pointingTORQUE VALUE MUST BE 9 TO 10 m.N. USE A TORQUE WRENCHTORQUE VALUE MUST BE 30 m.N. ± 10 %. USE A TORQUE WRENCHIMPORTANT NOTE: IT IT MANDATORY TO OBSERVE THE REQUIREMENTS IN PARAGRAPH (3.6) ENSURING RT/NT CABLE WATERTIGHTNESS (THERMOSHRINKABLE SLEEVE) AND ATTACHMENT (CLIPS)
70/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 01784.3 Commissioning the NTNote: To carry out the following phases of the Terminal Station commissioning, the link Base Stationmust be operational and its antenna correctly orientated.Considerations–Before commissioning the NT unit, complete the RT unit adjustment procedures.–No adjustment is required for commissioning the NT.–To check the voltage at the mains connector terminals, use a measuring instrument (voltmeter).–For the mains connection, use only the connection cable supplied with the equipment.–Never use an extension cable for connecting the NT unit to the power source.Stages (Figure 51 – The NT unit 220V)1. Connect the RT/NT connection cable. Use ref. 1 connector.2. To ground the NT unit in this way, carry out the procedures described in Chapter 3 Installation of the7390TS Terminal Station. Use the lug and screw hardware supplied with the equipment, ref. 7.3. Check that the mains socket to which the NT is to be connected supplies voltage compliant with theequipment characteristics and that it is fitted with an earth.4. (ref. 5)•For NCAxxx: connect the NT connection cable to the NT connector and then to the mains.•For NGAxxx: connect the 48V cable to the HE15-3 connector, then to the 48V arrival.5. Power-up the NT unit using the On/Off switch (ref. 6); the green "Power on" LED (ref. 3) lights up.The red "Alarm" LED (ref. 4) lights up (searching for the carrier frequency) then flashes at differentrates according to the current phase:•slow flashing: automatic scanning over the frequencies,•fast flashing: frame recovery (authentication by the serial number) once the frequency isfound.
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 71/ 11478Malfunctions to the installation:The A7390 is a reliable and easy-to-install system. By following the procedures described in thedocumentation, no problems should occur. However, if these procedures have been poorly applied, hereis a list of the possible problems that may arise.6. Wait for this automatical initialization time of the NT. As soon as the red LED (ref. 4) goes out, thesystem can be managed by the BS (calibration of the radio link (output, frequency, time) has beenperformed).Note: The maximum initialization time is in the order of 5 minutes (otherwise see § 5.4 Changing afaulty NT unit).Client terminals are connected to the ref. 2 connectors (see § 4.4 Client terminal connections (NT unit)or § 4.5 Client terminal connections (NT Lite unit)Manifestation of the problem Possible causes SolutionThe red NT LED is flas-hing slowly. 1 Errored NT declaration.2 Poor connector contact.3 Cable damaged or severed.4 Alignment problem.5 Incorrect RT settings.6 RT breakdown.7 NT breakdown.1 Check NT declaration.2 Check connectors. Secure loo-sely cabled connectors.3 Check installation wiring. Change damaged cables.4 and 5 Reconfigure and check antenna alignn-ment (cf. § 4.2.3 Site configuration and adjust-ment procedures).6 Replace RT.The red NT LED is flas-hing quickly. 1 Bad transmission.2 Incorrect NT settings. 1 Delete and recreate the managed NT using the 7390LT.Check the allocation of the correct NT serial number.2 and 3 Reconfigure and check antenna alignn-ment (cf. § 4.2.3 Site configuration and adjust-ment procedures).4 Replace RT.The red NT LED rest lit uninterrup-ted1 Check the NT supply voltage2 NT breakdown.Try a swith off/switch on, and if the LED remains red, replace NT.NEVER DISCONNECT THE NT/RT LINK UNLESS REQUIRED FOR MAINTENANCE OR INSTALLATION PURPOSES. SUCH INTERVENTION MUST BE CARRIED OUT IN ACCORDANCE WITH THE PROCEDURE INDICATED IN CHAPTER 5
72/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0178.Figure 51 – The NT unit 220VFigure 52 – The NT unit 48 VccFigure 53 – The NT Lite unit 220 VccNT/RT Link1Terminal connexion2Mains5Ground7ON/OFFPower on LED3Ready on LED46NT/RT Link1Terminal connexion2DC Input socket5Ground7ON/OFF6Power on LED3Ready on LED4NT/RT Link1Terminal connexion2Mains5Power on LED3Ready on LED4
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 73/ 114784.4 Client terminal connections (NT unit)There are ten types of NT units:4.4.1 Ethernet connectorFigure 54 – Affectation of Ethernet access points at NT back4.4.2 G703 connector (120 ohm E1 and 100 ohm T1 standards)9900 NCA 001, 9900 NGA 001and 9900 NCE 001 9900 NCA 002 9900 NCD 0019900 NCB 001, 9900 NGB 001 9900 NGA 004 9900 NCB 002, 9900 NGB 002Pin 1: Tx_diff_plus Pin 5: Not connectedPin 2: Tx_diff_Moins Pin 6: Rx_diff_MoinsPin 3: Tx_diff_plus Pin 7: Not connectedPin 4: Not connected Pin 8: Not connectedSHIELDED CABLES MANDATORYPin 1: Rx_Ring Pin 5: Tx_TipPin 2: Rx_Tip Pin 6: Not connected or equiment groundPin 3: Not connected or equipment ground Pin 7: Not connectedPin 4: Tx_Ring Pin 8: Not connected 2 x Eth 10bT 2x G703:E1 for NCA001 and NGA001T1 for NCE001G703 X212 x Eth 10bt 2 x Eth 10bt2 x Eth 10bT4 x ISDN/2B1Q 60V 2 x G7032 x Eth 10bT 4ISDN/4B3T-60V2 x Eth 10bTFront view soketFront view soket
74/ 114 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 0178ORFigure 55 – Affectation of G703 access points at NT back4.4.3 X21 connectorIf the distance between DCE (NT) and DTE is too long, according to V11 norms, you can exchange pin6 and pin 13 in order to get a phase inversion.Figure 56 – Affectation of X21 connector access points4.4.4 ISDN connector (Norm TS 102 - 080)Figure 57 – Affectation of ISDN access points at NT backPin 1: Rx_RingPin 2: Tx_TipPin 3: Rx_RingPin 4: Rx_TipSHIELDED CABLES MANDATORYPin 1: Screw Pin 6: S_neg Pin 11: R_posPin 2: T_neg Pin 7: B_neg Pin 12: I_posPin 3: C_neg Pin 8: Ground Pin 13: S_posPin 4: R_neg Pin 9: T_pos Pin 14: B_posPin 5: I_neg Pin 10: C_pos Pin 15: NotconnectedSHIELDED CABLES MANDATORYPin 4: TIPPin 5: RINGLEMOFemale connectorFront view soket
3CC12423AAAA TQ BJA 01 Issue 01 - March 2001 - Draft 03 75/ 114784.4.5 48V connector (HE 15)Figure 58 – Affectation of 48 V points4.5 Client terminal connections (NT Lite unit)There are two types of NT units:4.5.1 Ethernet connectorFigure 59 – Affectation of Ethernet access points at NT backSHIELDED CABLES MANDATORY9900 NCF 001, 9900 NCG 001(*)Pin 1: Tx_diff_plus Pin 5: Not connectedPin 2: Tx_diff_Moins Pin 6: Rx_diff_MoinsPin 3: Tx_diff_plus Pin 7: Not connectedPin 4: Not connected Pin 8: Not connectedSHIELDED CABLES MANDATORYGround 0 V / + 48 V- 48 V / 0 V2 x Eth 10bT 2xG703(E1):1 x Eth 10bT(*) 1xG703 E1 for NCF001Front view soket

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