User's Manual Part 2

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RBS 2109 User’s Guide

Connecting PCM Twisted Pair 100/120

Connect the twisted pairs to

P.LINE and N.LINE.

P0102010A

PORT. A. IN. P. LINE

PORT. A. IN. N. LINE

PORT. A. IN. GND

PORT. A. OUT. P. LINE

PORT. A. OUT. N. LINE

PORT. A. OUT. GND

PORT A

Earth the cables according to the following instruction:

Inner and outer

shield

Connect the inner shield to the terminator block, and

the outer shield to the cable gland, see Figure 24 on

page 61.

Outer shield only

Fit the shield to the cable gland, see Figure 25 on

page 62.

P011352A

Figure 24 Earthing Inner and Outer Shield

61EN/LZT 720 0090 Uen R1A 2004-09-17

Summary of content (75 pages)

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RBS 2109 User’s Guide Connecting PCM Twisted Pair 100/120 Connect the twisted pairs to P.LINE and N.LINE. PORT A PORT. A. IN. P. LINE PORT. A. IN. N. LINE PORT. A. IN. GND PORT. A. OUT. P. LINE PORT. A. OUT. N. LINE PORT. A. OUT. GND 1 P0102010A 2 Earth the cables according to the following instruction: Inner and outer shield Connect the inner shield to the terminator block, and the outer shield to the cable gland, see Figure 24 on page 61.
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RBS 2109 User’s Guide P011353A Figure 25 5.4.7 Earthing Outer Shield Only Installing the RRU This section describes how to install the Remote Radio Unit (RRU). Note: To avoid damage, do not place the RRU on its connectors, see Figure below. P010470A Figure 26 Note: 62 Do Not Place the RRU on its Connectors Do not install any equipment on the RRU before mounting it on the MBU.
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RBS 2109 User’s Guide Caution! The equipment is heavy. Lifting the equipment without the aid of a lifting device can cause injury. 1 Hang the RRU onto the upper hinge. Position the lower hinge and tighten the screw. P010122C 2 Remove the protection cover under the RRU.
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RBS 2109 User’s Guide 3 Open the left side cover on the RRU, connect the Y link cabl,e and close the cover. Connect the AC/DC cable. P010173B 4 Close the RRU using the clasps. P010125A 5.4.8 Connecting Earth Cables This section describes how to connect the earth cables to the RRU and the IXU. 1 Connect the earth cables from the earthing point to both IXU (master) and RRU.
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RBS 2109 User’s Guide Note: 5.4.9 If an Omni Antenna is to be installed on the RRU, the RRU earthing cable must be connected after the omni antenna bracket has been mounted. Installing the Fan Unit (Optional) This section describes how to install the fan unit. 1 Install the fan on top of the RRU and fasten the three screws. P010496A 2 Connect the power cable to the RRU. P010543A 5.4.
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RBS 2109 User’s Guide 1 Install the RXBP on the RRU and tighten the screws. RXBP RX 2 RXBP 2 RX 1 RXBP 1 P010175A 2 Connect the first cable from connection port RXBP 1 on the RXBP to connection port RXBP 1 on the RRU. Connect the other cable from connection port RXBP 2 on the RXBP to RXBP 2 on the RRU. RXBP RX 2 RX 1 RXBP 2 RXBP1 RXBP 1 RXBP 2 P010172A 3 Connect the RX antenna cables to connection port RX 1 and RX 2 on the RXBP, and tighten with the appropriate torque wrench.
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RBS 2109 User’s Guide 3. Install the RRU earthing cable. P011410A Figure 27 Mounting the Antenna Bracket 4. Attach the antenna on the bracket. Use the two captive screws on each side of the antenna. 5. Route and fasten the antenna cable with two clamps on the right side of the RRU. 6. Secure the antenna with the sunshield, see Section 5.4.15 on page 69.
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RBS 2109 User’s Guide 5.4.12 Installing the Integral Sector Antenna (If Applicable) This section describes how to install a Sector Antenna on the RRU. 1. Attach the Sector Antenna on the front of the RRU. Secure it with four screws. P011293A Figure 29 5.4.13 Installing the Sector Antenna Connecting RBS Antenna Cables This section describes how to connect antenna cables when a MCB or integral antenna is not used.
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RBS 2109 User’s Guide 2 Strap the cables using the appropriate cable tie anchor. P012173A 3 Install the protective cover under the RRU. P010565A 5.4.14 Testing the Installation The RBS is now ready for the site installation tests. The site installation tests should be performed directly after the completion of the RBS installation, see Chapter Site Installation Tests. After the installation and integration testing is completed, return to Section 5.4.15 on page 69. 5.4.
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RBS 2109 User’s Guide Different sunshields are used depending on whether or not components are installed on the front of the RRU. 1. If the fan unit or integral Omni Antenna are not used, install the top sunshield and fasten two screws either to the RRU or the IXU. See Figure below. P010232C 2. If the fan unit is used, install the fan cover on top of the RRU. See Figure below.
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RBS 2109 User’s Guide 3. Attach the front sunshield to the left sunshield. 4. Close the front sunshield and attach it to the top shield (fan cover) and to the right sunshield. 5. Lock the shield. 5.4.16 Performing Concluding Routines This section describes the routines to be completed before leaving the site. Note: Ericsson strongly advises that when cleaning up after installing the RBS, the personnel performing the installation pay particular attention to the environment.
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RBS 2109 User’s Guide 5.4.16.2 Performing Final Checks Before leaving the site, make sure that the following tasks have been completed: Table 12 Checklist Check the following: OK 1 All cables are properly routed and connected. 2 All sunshields are properly installed. 3 The site is clear of waste materials. 4 The Site Installation Documentation is updated. 5 The modified Site Installation Documentation has been handed over to the person responsible for the site.
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RBS 2109 User’s Guide 6 Antenna System Tests This chapter describes the tests, Distance To Fault (DTF) and Standing Wave Ratio (SWR), used to verify the antenna system installation. The tests also include measuring the feeder length to calculate feeder system loss and delay.
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RBS 2109 User’s Guide Serial Interface External Power Battery Charging 12.
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RBS 2109 User’s Guide Work Process for Antenna System Tests This section describes the order in which to perform the tests. When the exit criteria for each procedure are fulfilled, the tester enters the results in the test record, then returns to the work process for the next step. Figure 31 Work Process for Antenna System Tests The work order can be altered or tests can be removed due to local circumstances. In this event, an investigation of the consequences must be carried out.
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RBS 2109 User’s Guide 6.1 Checking the Installation This section describes how to check that the antenna system installation is correct. 1. Verify that the installation is installed in accordance with the Site Installation Documentation. 2. Check that all cables or connectors are free of damage, and that all cables (feeders and jumpers) are properly marked. 3. Check that all connectors are properly connected and tightened. 4.
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RBS 2109 User’s Guide 3. Enter the Start frequency in MHz, from the table below. Press ENTER. 4. Press the F2 soft key. 5. Enter the Stop frequency in MHz, from the table below. Press ENTER. 6. Check that the FREQ (MHz) scale in the display area indicates the correct frequency start and stop values. Table 13 6.2.2 Start and Stop Frequencies System Start Freq. (MHz) Stop Freq.
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RBS 2109 User’s Guide 3. Press the START CAL key. 4. Connect the ‘‘Open’’ and press ENTER. Wait for the measurement to be completed. 5. Repeat step 4 for ‘‘Short’’ and ‘‘Load’’ according to the step-by-step instructions on the screen. 6. When the calibration is complete, disconnect the calibration equipment from the Test Port Extension Cable. After the calibration, the display shows ‘‘CAL ON’’ as long as the calibration is valid. 6.2.
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RBS 2109 User’s Guide Table 14 Feeder Type Andrew Velocity Factor (PROP VEL) Attenuation, dB/m (CABLE LOSS) GSM 800 GSM 1900 7/8” LDF5 0.89 0.037 0.060 1 1/4” LDF6 0.89 0.027 0.043 1 5/8” LDF7 0.88 0.022 0.036 Note: 6.3 Velocity Factor and Attenuation for Different Cables If the cable type is not found in the table above, the values must be taken from the manufacturer’s specifications.
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RBS 2109 User’s Guide Antenna Test Equipment RBS Jumper Feeder Antenna Jumper 50 W P010260A Figure 33 DTF Test Setup for Passive Antenna Systems (No TMA) 3. Check that all connections are properly connected and tightened. Connecting Test Setup for Antenna Systems with ddTMA 1. Connect the 50 standard load to the TMA jumper. See figure below. 2. Connect the test equipment to the RBS jumper. See figure below.
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RBS 2109 User’s Guide 2. Ensure that the test equipment is connected according to Section 6.3.1 Connecting DTF Test Setup on page 79. 3. Press the FREQ/DIST key to set the frequency. 4. Press the D1 soft key, enter the desired start value (usually 0.0 m) and press ENTER. 5. Press the D2 soft key, enter the desired stop value (usually a slight overestimation of the total length of the feeder system) and press ENTER. 6. Press the AMPLITUDE key to set the scale. 7. Press the TOP soft key, enter 1.
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RBS 2109 User’s Guide Example of an Unacceptable DTF Measurement DTF CAL ON LIM ON 1.20 DTF2 259 POINTS RECALL ON/OFF EDIT DELTA (M2 - M1) MARKER TO PEAK MARKER TO VALLEY 1.00 0.0 M1:1.01,2.3m 2 :+0.07, +38.6m DIST (m) M3=OFF M4=OFF 50.0 BACK P007952A Figure 36 6.3.3 Example of an Unacceptable DTF Measurement Measuring Feeder Length This section describes how to measure the feeder length, based on the result of the test in chapter Section 6.3.2 Testing Feeder Installation on page 80. 1.
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RBS 2109 User’s Guide DTF CAL ON LIM ON 1.20 DTF1 259 POINTS RECALL ON/OFF EDIT DELTA (M2 - M1) MARKER TO PEAK MARKER TO VALLEY 1.00 0.0 M1:1.01,2.3m 2 :+0.07, +38.6m DIST (m) M3=OFF M4=OFF 50.0 BACK P007951A Figure 37 Placing the M1 and M2 Markers 4. Press the BACK soft key and then the M2 soft key. 5. Press the EDIT soft key and place the M2 marker at the far end of the feeder, using the UP/DOWN arrow key. See figure above. 6.
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RBS 2109 User’s Guide 1. The cell ID found in the Site Installation Documentation is "SOF007_A". 2. The text on the feeder label is "Cell A: DX1". 3. The type of measurement is DTF, so the name of the measurement is "DTFSOF007ADX1". Example 1 6.5 Naming a DTF Measurement Calculating the Feeder Attenuation This section describes how to calculate the attenuation of the feeder system. 1. Use the feeder length measured in Section 6.3.3 Measuring Feeder Length on page 82. 2.
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RBS 2109 User’s Guide Table 15 Attenuation for Different Cables Feeder Type Andrew Attenuation, dB/m (CABLE LOSS) GSM 800 GSM 1900 1/4” LDF1 0.124 0.195 1/4” FSJ1 (flex) 0.179 0.278 3/8” LDF2 0.106 0.166 3/8” FSJ2 (flex) 0.121 0.191 1/2” LDF4 0.066 0.104 1/2” FSJ4 (flex) 0.107 0.171 7/8” LDF5 0.037 0.060 1 1/4” LDF6 0.027 0.043 1 5/8” LDF7 0.022 0.
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RBS 2109 User’s Guide Example 2 6.6 Calculating the Total Feeder Attenuation Calculating the Feeder Delay This section describes how to calculate the total delay in the feeder system. 1. Use the feeder length measured in Section 6.3.3 Measuring Feeder Length on page 82. 2. Find the delay value (ns/m) for the cable type in Table 15 on page 85. Calculate the total attenuation for each feeder and jumper, by multiplying the length in metres with the delay per metre. 3.
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RBS 2109 User’s Guide Table 16 Delay Specifications for Different Cables Feeder Type Andrew Delay, ns/m 1/4” LDF1 3.9 1/4” FSJ1 (flex) 4.0 3/8” LDF2 3.8 3/8” FSJ2 (flex) 4.0 1/2” LDF4 3.8 1/2” FSJ4 (flex) 4.1 7/8” LDF5 3.7 1 1/4” LDF6 3.7 1 5/8” LDF7 3.8 Note: If the cable type is not found in the table above, the values must be taken from the manufacturer’s specifications.
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RBS 2109 User’s Guide Example of Calculating the Total Feeder Delay Example 3 88 Calculating the Total Feeder Delay EN/LZT 720 0090 Uen R1A 2004-09-17
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RBS 2109 User’s Guide 6.7 Performing SWR Test on Passive Antenna Systems (Without TMA) The purpose of the SWR test is to verify that the antenna system functions correctly when it is completely installed. The test verifies that the SWR is not too high and that the signal is not reflected back into the RBS. 6.7.1 Connecting SWR Test Setup This section describes how to connect the SWR test setup for passive antenna systems (without TMA). 1. Connect the test equipment to the RBS jumper, see figure below.
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RBS 2109 User’s Guide 6. Observe the trace in the frequency range according to the table below. Table 17 TMA) Measurement Frequency Range for Passive Antenna Systems (No System Start Freq. MHz Stop Freq. MHz GSM 800 824 894 GSM 1900 1850 1990 7. Check that no SWR levels are over 1.4 (= 15.6 dB RL) between the frequencies stated in the table above. For conversion between VSWR and Return Loss see Table 20 on page 99. Enter the test result in the test record.
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RBS 2109 User’s Guide Example of an Unacceptable SWR Measurement CAL ON LIM ON 2.00 SWR ANTENNA 900 259 POINTS RECALL M1 M2 M3 1.4 M4 1.00 800.0 M1:1.03,889.9MHz M2:1.19,959.7MHz FREQ (MHz) M3=OFF M4=OFF 1000.0 ALL OFF P010277A Figure 41 TMA 6.8 Example of an Unacceptable SWR Measurement, GSM 900, No Performing SWR Test on Antenna Systems with ddTMA The purpose of the SWR test is to verify the antenna system when it is completely installed.
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RBS 2109 User’s Guide TX/RX antenna ddTMA Test Equipment RBS Jumper Feeder TMA Jumper Tx Rx ANT Antenna Jumper Bias Injector P012636A Figure 42 6.8.2 Test Setup for Antenna Systems with ddTMA Testing the Antenna System 1. Check that the Site Master’s display shows ‘‘CAL ON’’, indicating that the Site Master is calibrated. If the display shows ‘‘CAL OFF’’, calibrate the Site Master according to Section 6.2 Calibrating the Antenna Tester on page 76. 2.
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RBS 2109 User’s Guide Table 18 Measurement Frequency Range for Antenna Systems with ddTMA RX Band (on TMA Label) TX Band (Measurement Frequency Range) Start Freq. MHz Stop Freq. MHz Start Freq. MHz Stop Freq. MHz GSM 800 824 849 869 894 GSM 1900 1850 1910 1930 1990 1850 1880 1930 1960 1865 1895 1945 1975 1880 1910 1960 1990 System 7. Check that no SWR levels are over 1.5 (= 14.0 dB RL) in the TX band, see table above.
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RBS 2109 User’s Guide Example of an Acceptable SWR Measurement CAL ON LIM ON 2.00 SWR DDTMA 900 259 POINTS RECALL M1 M2 M3 1.5 M4 1.00 800.0 M1:1.22,934.9MHz M2:1.17,959.7MHz FREQ (MHz) M3=OFF M4=OFF 1000.0 ALL OFF P010266A Figure 43 ddTMA Example of an Acceptable SWR Measurement, GSM 900 with Example of an Unacceptable SWR Measurement CAL ON LIM ON 2.00 SWR DDTMA 900 259 POINTS RECALL M1 M2 M3 1.5 M4 1.00 800.0 M1:1.22,934.9MHz M2:1.17,959.7MHz FREQ (MHz) M3=OFF M4=OFF 1000.
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RBS 2109 User’s Guide 6.9 Naming an SWR Measurement This section describes how to give the measurement a unique name traceable to the correct antenna system on the correct site. 1. Find the cell ID in the Site Installation Documentation. 2. Read the label on the jumper measured. 3. Combine the measurement type, cell ID, and label text (a unique name with a maximum of 16 characters). The following example illustrates these steps: Site Installation Documentation 1.
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RBS 2109 User’s Guide Test Record for Antenna System Tests Date: Site Name: Site No: RBS Serial No: Tester's Name: Test Instrument: Anritsu Site Master S_______ Serial Number: Installation Check DTF Test Feeder Length RRU 0 RRU 1 RRU 2 RRU 0 RRU 1 RRU 2 RRU 0 RRU 1 RRU 2 RRU 0 RRU 1 RRU 2 TX(/RX)1 TX(/RX)2 RX1* RX2* * If applicable Total Feeder Attenuation TX(/RX)1 TX(/RX)2 RX1* RX2* * If applicable Total Feeder Delay TX(/RX)1 TX(/RX)2 RX1* RX2* * If applicable SWR Test SWR/Return L
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RBS 2109 User’s Guide 6.10.2 Making a Test Record Supplement The figure below is an example of a printout from the Site Master Software Tools. This should be added as a supplement to the test protocol, and included in the Site Installation Documentation.
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RBS 2109 User’s Guide 6.10.3 Filling in the Checklist The following checklist is not mandatory but is strongly recommended. Local procedures and safety regulations must be evaluated and included in this checklist. Table 19 Checklist Check the following: 6.11 OK 1. That all outdoor antenna system connectors are covered with sealing tape. 2. That the test record is filled in. 3. That the Site Installation Documentation is completed with the test record and the test record supplements.
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RBS 2109 User’s Guide Table 20 Conversion Table Return Loss (dB) SWR Return Loss (dB) SWR Return Loss (dB) SWR 4.0 4.42 16.0 1.38 28.0 1.08 6.0 3.01 16.2 1.37 28.5 1.07 8.0 2.32 16.4 1.36 29.0 1.07 10.0 1.92 16.6 1.35 29.5 1.07 10.5 1.85 16.8 1.34 30.0 1.06 11.0 1.79 17.0 1.33 30.5 1.06 11.2 1.76 17.2 1.32 31.0 1.05 11.4 1.74 17.4 1.31 31.5 1.05 11.6 1.71 17.6 1.30 32.0 1.05 11.8 1.69 17.8 1.29 32.5 1.04 12.0 1.67 18.0 1.29 33.0 1.
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RBS 2109 User’s Guide 100 EN/LZT 720 0090 Uen R1A 2004-09-17
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RBS 2109 User’s Guide 7 Site Installation Tests This section describes the test procedure for site installation tests. 7.1 Preconditions Before starting the tests, ensure the following: • A completed test record for Antenna System Tests is available • The nominal AC mains voltage and/or DC supply on the site is known Note: The information above can be found in: Site Installation Documentation 7.1.
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RBS 2109 User’s Guide Inspecting the Cable Connections Verifying AC Mains and/or DC Power Supply Switching on the RBS Testing Fan Unit Setting the IDB Parameters Reading Fault Status Testing External Alarms Performing Concluding Routines P010216B Figure 47 Work Process for Site Installation Tests The work order can be altered or tests can be removed due to local circumstances, but if this is the case, an investigation of the consequences must be carried out.
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RBS 2109 User’s Guide Danger! Electric shock risk. Avoid both direct and indirect contact with parts connected to mains power as this is likely to be fatal. Switch off the mains power before starting work. 1 Open the sunshields and the RRU, and remove the lid from the MBU. 2 If applicable, measure the incoming AC Mains power to the RBS, using a multimeter. Check that the incoming AC Mains power is between 100 and 127 V AC, or between 200 and 250 V AC.
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RBS 2109 User’s Guide 1 Switch on the RBS AC on/off switches on the MBU on all cabinets. Repeat this procedure for the RBS DC on/off and the RRU on/off switches. 2 Before continuing testing of the site installation, ensure that the indicators on the RRU and IXU interface panels have the status shown in the table below when the RBS is in local mode.
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RBS 2109 User’s Guide Table 23 IXU Indicators Before Setting the IDB Parameters (1) DC power on On IXU temp. Off Transmission OK On/Off (2) (1) Depending on power system configuration. (2) Status, depending on transmission configuration. Note: In cold conditions, the RBS may need up to 60 minutes to warm up, during which time the IXU or RRU temperature indicator is on. The internal heater works only with an AC power supply. 3.
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RBS 2109 User’s Guide Table 24 Fan Unit Indicators After Test Fan unit Indicator Status Fault Off Operational On 5. Put back the fan unit cover. 7.6 Setting IDB Parameters This section describes how to set the IDB parameters using the Operation and Maintenance Terminal (OMT). For more information on the use of the OMT, see: OMT User’s Manual EN/LZN 720 0001 Work Process for Setting IDB Parameters This section describes the work process for setting the IDB parameters.
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RBS 2109 User’s Guide Connecting the OMT Reading the IDB Creating IDB Defining External Alarms Defining ALNA / TMA Parameters Defining Delay Defining GPS Parameters Defining Hardware Info for Passive Units Defining Loss Defining RBS Identity Defining Transmission Interface E1, 75 Defining Transmission Interface E1, 120 Defining Transmission Interface T1, 100 Defining TEI Defining TNOM Installing IDB P011295B Figure 49 Note: Work Process for Setting IDB Parameters The IDB parameter values require
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RBS 2109 User’s Guide 7.6.1 Connecting OMT This section describes how to connect the OMT physically to the RBS. 1. Remove the lid from the OMT port on the IXU. 2. Connect the OMT cable from the PC serial port to the OMT port on the right-hand side of the IXU. If an extended OMT cable is connected to the OMT port, then connect the OMT cable to the end of the extended OMT cable. Local/Remote AC power on DC power on IXU temp.
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RBS 2109 User’s Guide Table 25 Reading and Checking IDB Check that the following parameters are correct: OK Transmission interface Cabinet configuration(s) Antenna sector configuration(s) 5. If the IDB parameters in the table above need to be set, see Section 7.6.3 Creating IDB on page 109. If the IDB parameters above are correct, set the following applicable site-specific IDB parameters: 7.6.
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RBS 2109 User’s Guide Figure 51 Creating IDB Defining Cabinet Setup 1. To add cabinets to the Cabinet Setup box, click New to open the Define Setup for Cabinet window. 2. In the Cabinet Type box, select the RBS ‘‘2109’’. 3. In the Define Master Cabinet Setup window, select the applicable master cabinet configuration and click OK: – IXU – IXU/RRU 4. Select the power system used: – 230/115 V AC, no backup – 230/115 V AC, external battery – – 48 V DC 5.
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RBS 2109 User’s Guide 6. Click OK when finished. 7. Repeat steps 4 to 9 to add another RRU cabinet to the configuration. Defining Antenna Sector Setup For different Site Cell Configurations (SCC), the number of cells is related to antenna sectors. The number of TRXs is related to the number of RRUs (antenna systems). The RBS 2109 has two TRX/RRU. Example 1: For an RBS 2109 in a SCC = 1x4, define an RBS with two RRUs (two TRX/RRU) and then define one antenna sector with two antenna systems (RRUs). 1.
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RBS 2109 User’s Guide 7.6.4 Defining External Alarms This section describes how to define the external alarms, that is, customer-specific alarms, if applicable. See Site Installation Documentation. 1. On the Configuration menu, click Define and Alarm Inlets to open the Define Alarm Inlets window. 2. In the Alarm Inlet Information window, select a physically connected alarm inlet that needs to be defined. P010226A Figure 52 Defining Alarm Inlets 3. In the Inlet Usage box, select ‘‘External Alarm’’. 4.
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RBS 2109 User’s Guide This message will be displayed in the BSC/OMT if the alarm is issued. 8. Click Apply after defining the alarm. 9. Repeat steps 2 to 8 to define remaining alarms. 10. Click OK when all alarms are defined. Defining External Alarms for EBB and PBC The alarms for EBB and PBC should be defined according to the tables below.
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RBS 2109 User’s Guide EBB-06 Table 28 External Alarm Definitions for EBB-06 Alarm Inlet Inlet Usage Type 0/4 Breaking External Alarm Id (1) Severity Comment Level 2 Battery backup fault (1) Preferably, ID should be set to the same number as the corresponding alarm inlet.
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RBS 2109 User’s Guide 1. On the Configuration menu, click Define and Delay to open the Define Delay window. 2. Select the cable for which delay is to be defined, and click Run. 3. Enter the delay value (in ns) and click OK. 4. Repeat steps 2 and 3 for the remaining cables. 5. Click Close when finished. 7.6.7 Defining GPS Parameters This section describes how to define the GPS parameters. To be able to use GPS as a synchronisation source, the RBS must be equipped with a GPS receiver. 1.
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RBS 2109 User’s Guide 4. Repeat steps 2 to 3 for all applicable HW units. 5. Click Close when finished. 7.6.9 Defining Loss This section describes how to define the Total Feeder Attenuation. 1. On the Configuration menu, click Define and Loss to open the Define Loss window. 2. Select the appropriate feeder cable (for example, FEED_RXA 0) and click Run. 3. In the Define Loss window, enter the Total Feeder Attenuation from the test record for Antenna System Tests and click OK.
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RBS 2109 User’s Guide Table 30 PCM Parameter Settings for Transmission Interface E1, 75 PCM Parameter Settings Transmission Interface E1 Network Topology See Site Installation Documentation Sync Source See Site Installation Documentation CRC-4 See Site Installation Documentation Spare bits See Site Installation Documentation Receiver Sensitivity 7.6.
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RBS 2109 User’s Guide Note: Ports C and D can also be used as a multidrop pair. Far End RBS 1 A(C) B(D) RBS 2 A(C) B(D) RBS 3 A(C) B(D) P008428C Figure 53 System View for Transmission Interface E1, 120 1. Calculate the cable attenuation between the Far End and the RBS according to the following formula: Cable attenuation = cable length x cable attenuation per metre (or foot).
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RBS 2109 User’s Guide In this example, Far End and the RBS refer to the figure above The cable length between the RBS and the Far End is 150 m. The cable attenuation for the cable between the RBS and the Far End is 0.03 dB/m 1. 2. 3. 4. 5. Calculate the cable attenuation between the Far End and the RBS: 150 m x 0.03 dB/m = 4.5 dB Set Receiver Sensitivity A for the RBS to “Short haul”. Set Receiver Sensitivity C for the RBS to “Short haul” (not connected).
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RBS 2109 User’s Guide 2. If there is no information about the transmission interface type in the Site Installation Documentation, use the cable length to find the appropriate section in the table below. Table 33 Selecting Section for Defining T1, Cable Length Known If... then... the cable length is less than 655 feet go to Section Defining LBO Parameters as Short Haul on Page 120. the cable length is more than 655 feet and...
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RBS 2109 User’s Guide P010223A Figure 55 Defining Transmission Parameters 2. Set the parameters according to the table and instructions below. 3. Click OK when all parameters are set.
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RBS 2109 User’s Guide Customer Interface DSX-1 RBS 1 A(C) B(D) RBS 2 A(C) B(D) RBS 3 A(C) B(D) P008645B Figure 56 System View for Transmission Interface T1, Short Haul 1. Determine the length of the cable between the RBS and the customer interface (the cross-connection point DSX-1). See figure above. If multidrop is used, then calculate the attenuation of the entire RBS chain, since LBO A (C) is determined by the total attenuation of the chain.
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RBS 2109 User’s Guide In this example, customer interface (DSX-1), RBS 1 and RBS 2 refer to the figure above. RBS 1: The cable length between RBS 1 and the customer interface (DSX-1) is 200 feet (61 m). 1. Set LBO A for RBS 1 to “Short h., 133 – 266 feet”. See the table above Set LBO B for RBS 1 to “Short h., 0 – 133 feet”. Set LBO C and D (not connected) for RBS 1 to “Short h., 0 – 133 feet”. 2. 3.
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RBS 2109 User’s Guide P010223A Figure 59 Defining Transmission Parameters 2. Set the parameters according to the table and instructions below. 3. Click OK when all parameters are set. Table 37 Manual PCM Parameter Settings for Transmission Interface T1, Long Haul PCM Parameter Settings Transmission Interface DS1(T1) Network Topology See Site Installation Documentation. Sync Source See Site Installation Documentation.
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RBS 2109 User’s Guide Note: It is also possible to use ports C and D as a multidrop pair. 1. If the carrier advised code is given in the Site Installation Documentation, then use the table below to set the correct A (B, C, D) LBO parameters. If multidrop is used, then calculate the attenuation of the entire RBS chain, since LBO A (C) is determined by the total attenuation of the chain.
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RBS 2109 User’s Guide Example of a Manual LBO Parameters Calculation for Long Haul Network Interface RBS 1 RBS 2 RBS 3 ACBD ACBD ACBD Cable Carrier Advised Attenuation = Code= 5 dB -15 dB Cable Attenuation = 3 dB Cable Attenuation = 9 dB P010473A Figure 60 126 Calculating LBO Parameters Manually for Long Haul EN/LZT 720 0090 Uen R1A 2004-09-17
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RBS 2109 User’s Guide In this example, network interface, RBS 1, RBS 2 and RBS 3 refer to the figure above. RBS 1: Carrier advised code at the network interface is “C” (-15 dB) and the cable attenuation is 5 dB. 1. See the table Long haul parameters for different carrier advised codes at the network interface to find the correct LBO parameter for LBO A. 2. Set LBO A to “Long h., -15 dB”. 3. Set LBO B to “Long h., 0 dB”. 4. Set LBO C and D (not connected) to “Short h., 0 - 133 feet”.
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RBS 2109 User’s Guide RBS Customer Interface (Far End) Maximum input signal level A(C) B(D) Measured cable attenuation P008626B Figure 61 System Parameters for Defining LBO Parameters Automatically to Long Haul 1. On the Configuration menu, click Define and PCM to open the Define PCM window. See figure below. P010223A Figure 62 Defining Transmission Parameters 2. Use the table and instructions below to set the parameters. 3. Click OK when all parameters are set.
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RBS 2109 User’s Guide Table 40 PCM Parameter Settings for Transmission Interface T1, Long Haul Automatically PCM Parameter Setting Transmission Interface DS1(T1) Network Topology See Site Installation Documentation. Sync Source See Site Installation Documentation. LBO A See instructions below LBO B LBO C LBO D FDL Use See Site Installation Documentation. The instructions below describe how to set the PCM parameters automatically. For RBS 1 only: 1. Set LBO A (C) to ‘‘Long h.
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RBS 2109 User’s Guide P010477A Figure 63 Monitoring Cable Attenuation 6. Click on Start Monitor and read the value of the cable attenuation. The displayed value is given in deci dB (10 deci dB = 1 dB). Make a note of the value in the test record. When configuring the IDB for RBS 2 and RBS 3, follow the instructions below. For RBS 2 and RBS 3: 7. Set LBO A (C) on RBS 2 (RBS 3) to ‘‘Long h. ALBO, 0 dB’’. 8. On the Configuration menu, click Install IDB. 9. On the Maintenance menu, click Monitor. 10.
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RBS 2109 User’s Guide 11. Click on Start Monitor and read the value of the cable attenuation. The displayed value is given in deci dB (10 deci dB = 1 dB). Make a note of the value in the test record. 12. Add the measured cable attenuation values. The value given by Lin Att PCM A (C) is the cable attenuation to the previous RBS in the chain, so the measured value must be added to the value for the previous RBS(s) to obtain the total cable attenuation for the RBS in question. 13.
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RBS 2109 User’s Guide In this example, Far End, RBS 1, RBS 2 and RBS 3 refer to the figure above. Maximum input signal level at the Far End is -15 dB. The cable attenuation is not known. RBS 1: 1. Set LBO A to “Long h. ALBO, -15 dB”. The cable attenuation is measured by the RBS to 5 dB. 2. 3. 4. The value of LBO A is set automatically by the RBS. Set LBO B to “Long h., 0 dB”. Set LBO C and D (not connected) to “Short h., 0 - 133 feet”. RBS 2: 1. Set LBO A to “Long h. ALBO, 0 dB”.
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RBS 2109 User’s Guide Defining LBO Parameters when Transmission Characteristics are Unknown This section describes how to define the LBO parameters if none of the following parameters are known: carrier advised code, maximum input signal at the customer interface, cable attenuation or cable length. 1. On the Configuration menu, click Define and PCM to open the Define PCM window. See figure below. P010223A Figure 65 Defining Transmission Parameters 2. Set the parameters according to the table below. 3.
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RBS 2109 User’s Guide Table 42 PCM Parameter Settings for Transmission Interface T1, Transmission Characteristics Unknown PCM Parameter Settings LBO B ‘‘Long h., 0 dB’’, if used ‘‘Short h., 0 – 133 feet’’, if unused LBO C ‘‘Long h., 0 dB’’, if used ‘‘Short h., 0 – 133 feet’’, if unused LBO D ‘‘Long h., 0 dB’’, if used ‘‘Short h., 0 – 133 feet’’, if unused FDL Use 7.6.14 See Site Installation Documentation. Defining TEI This section describes how to define the TEI value for the IXU. 1.
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RBS 2109 User’s Guide Note: The RBS must be in Local Mode in order to accept a new or modified IDB. 1. Physically connect the OMT to the RBS if not already connected. See Section 7.6.1 Connecting OMT on page 108. 2. On the RBS 2000 menu, click Connect to connect the OMT logically to the RBS. 3. On the Configuration menu, click Install IDB. If the OMT detects inconsistencies between the RBS HW and the IDB, then the differences will be displayed in a window.