Repeater Technologies OC80002 Distributed Antenna Systems User Manual users manual

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2. Revised manual page to include rf exposure statement

users manual

OfficeCell Manual, Rev. E3Operating ManualOfficeCell Distributed Antenna System

iiiTable of Contents1 LINK DESCRIPTION........................................................................................................................................1-11.1 CAUTIONS AND WARNINGS...........................................................................................................................1-11.2 GENERAL DESCRIPTION.................................................................................................................................1-11.2.1 Basic Principles ..................................................................................................................................1-21.2.2 Functional Description .......................................................................................................................1-31.3 SPECIFICATIONS............................................................................................................................................1-72 INSTALLATION ...............................................................................................................................................2-12.1 GENERAL PROCEDURE...................................................................................................................................2-12.2 INSTALL FIBEROPTIC CABLES ........................................................................................................................2-42.2.1 Minimizing Optical Reflections ..........................................................................................................2-42.2.2 Cleaning Optical Connectors..............................................................................................................2-52.3 SYSTEM ALARMS ..........................................................................................................................................2-62.4 HUB SHELF AND REMOTE POWER SUPPLY BATTERY CHARGE MONITORING AND BATTERY REPLACEMENT....2-62.4.1 Replacing the Hub Shelf Battery.........................................................................................................2-62.4.2 Replacing the Remote Power Supply Battery .....................................................................................2-72.5 INSTALLATION CHECKLIST............................................................................................................................2-72.5.1 Inspect Received Items........................................................................................................................2-72.5.2 Recommended Tools............................................................................................................................2-82.6 INSTALLING THE HUB SHELF..........................................................................................................................2-82.7 INSTALLING THE REMOTE TRANSCEIVERS......................................................................................................2-93 MONITORING AND TROUBLESHOOTING...............................................................................................3-13.1 FIELD SUPPORT NUMBERS .............................................................................................................................3-13.2 TROUBLESHOOTING TIPS...............................................................................................................................3-2

1-11 Link Description1.1 Cautions and WarningsThroughout this manual, these terms appear which highlight the care that should be exercised to ensurepersonal safety and proper operation of the equipment.WARNING: Warning statements identify conditions or practicesthat could result in injury or loss of life.CAUTION: Caution statements identify conditions or practicesthat could result in damage to this product or other property.NOTE: this equipment has been tested and found to comply with the limits for a Class B digitaldevice, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonableprotection against harmful interference in a residential installation. This equipment generates, usesand can radiate radio frequency energy and if not installed and used in accordance with theinstructions, may cause harmful interference to radio communications. However, there is noguarantee that interference will not aoccur in a particular installation. If this equipment does causeharmful interference to radio or television reception, which can be determined by turning theequipment off and on, the user is encouraged to try to correct the interference by one or more of thefollowing measures:- Reorient or relocate the receiving antenna- Increase the separation between the equipment and receiver- Connect the equipment into an outlet on a circuit different from that to which the receiver isconnected- Consult the dealer or an experienced radio/TV technician for help.CAUTION: any modifications to this device not expresslyauthorized by Repeater Technologies, Inc. could void the user’sauthority to operate this device.1.2 General DescriptionThe OFFICECELL Fiberoptic Distributed Antenna System provides extended coverage of cellular and PCSnetworks throughout buildings and campus environments. The Hub Shelf is the HUB SHELF which is a 3U(5.25 inch) high, 19 inch wide rack-mounted chassis. The HUB SHELF holds up to 8 HUB TRANSCEIVERPlug-Ins. The Hub Shelf is located in a communications equipment room in the building and is connected tothe cellular/PCS base station or repeater via hardline connection. The Hub Shelf may also be connected tothe radios of a wireless PBX. Each Hub Shelf is configured with up to eight HUB TRANSCEIVER plug-incards. Each card is connected to up to two Remote Transceivers. The REMOTE TRANSCEIVER Units are

1-3and passed through a load to recover the RF signal.The basic RF loss in this link is determined by the inefficiencies of the conversions of RF to optical andback. The fiber also contributes an RF loss equal to twice the optical loss. This is because the photodiodeconverts optical power to electrical current and RF power is proportional to the square of the current. So,for 1 km of fiber with a loss of 0.4 dB/km (this is typical at 1310 nm wavelength) the optical loss is 0.4 dBand the contribution to the RF loss is 0.8 dB. In a real installation, two optical connectors will addapproximately 0.5 dB of optical loss.The laser and, to a much lesser degree, the photodiode, add noise and distortion to the RF signal. This RFperformance is characterized just as any RF link in terms of dB loss, noise figure, third order intercept, etc.The fiber path itself can contribute noise and distortion. In the OFFICECELL, the laser used is a Fabry-Perot(FP) laser instead of a Distributed Feedback (DFB). The DFB has a single spectral component. The FP laserhas multiple spectral components which can contribute noise and distortion for longer fiber runs. For thedistances used in the OFFICECELL, this effect is not significant. Also, optical backscattering back into thelaser from less than perfect connections can cause additional noise and distortion. The FP lasers used in theOFFICECELL are much less sensitive to this than are DFB lasers. DFB lasers are also considerably moreexpensive. However, if optical reflections are severe enough from a bad connection, the resulting opticalreflection may cause performance degradation. To minimize this, SC/UPC optical connectors with a returnloss > 50 dB are used at the Hub Shelf and OptoClip connectors with a return loss of > 60 dB are used at theRemote Transceiver. Following standard practices in cleaning of the removable optical connectors (seeprocedure outlined below) will keep the connections in spec and will avoid the problems of performancedegradation.1.2.2 Functional DescriptionThe OFFICECELL Fiberoptic Antenna System connects to the mobile coverage RF ports of a repeater orFigure 2. System Block Diagram

1-4base station as an extended coverage antenna. The Hub Shelf mounts in a standard 19 inch rack close to therepeater or base station transmit and receive RF ports. These RF connections are made via the RF connectorson the rear panel. Inside the chassis, the transmit signal is split and routed to the Hub Transceiver Plug-Ins.Each plug-in is a fiberoptic transceiver. The Hub Shelf holds up to eight plug-ins. Each plug-in interfaceswith up to two Remote Transceivers by way of fiberoptic connections on the Hub Shelf rear panel.The HUB TRANSCEIVER Plug-Ins are connected to the Remote Transceivers via singlemode fiber at 1310nm wavelength. Separate fibers are needed for the transmit and receive signals. SC/UPC optical connectors(SC/PC snap-in connectors with an “ultra-polish”) are used at the Hub Shelf. These connectors are usedbecause they are compatible with the optical blindmate connectors used on the HUB TRANSCEIVER Plug-Ins. The bulkhead connectors are polished to a return loss of > 50 dB.The Remote Transceiver is a fiberoptic transceiver that connects to an external indoor coverage antenna.Depending on coverage and cost requirements, an RF splitter may be used to connect the Remote Transceiverto two or more antennas. The Remote Transceiver uses field-installable OptoClip II optical connectors. TheRemote Transceiver optical output is the green connector. The REMOTE TRANSCEIVER units are generallymounted above the false ceiling on a bulkhead or post. Each REMOTE TRANSCEIVER is connected to anindoor coverage antenna by way of a customer-supplied flexible RF cable. Some indoor antennas areavailable with flexible RF cable pigtails and an SMA connector termination. These units are distributedthroughout the building or campus as necessary to get full coverage. After installation, the transmit powerfrom each Antenna Unit may be adjusted manually by way of an potentiometer on the unit. This isFigure 3. OfficeCell RF Path Block Diagram.

1-5Figure 4. The Remote Transceivers are normally mountedabove the false ceiling but may be mounted in the room.Each Remote Power Supply is connected to the Hub Shelfvia 2 singlemode fibers. The Remote Power Supply isconnected to a user-supplied antenna via flexible RF cable.The Remote Transceivers may be powered using theoptional universal Remote Power Supply with batterybackup, or using a central power supply that distributes DCpower along with the fiber over a composite fiber/conductorpotentiometer indented in 2 dB steps. This is a one time adjustment. For dual band units, there is a separateadjustment for each band.Several versions of the REMOTE TRANSCEIVER are available that are optimized for specific formats suchas DAMPS, GSM900, GSM1800, etc. Dual band versions are available; one providing simultaneouscoverage for GSM900 and GSM1800 and one for PCS1900 and 800 MHz. In these versions, a single RF portfeeds a dual band antenna.The block diagram of the OFFICECELL Fiberoptic Antenna System is shown in Figures 2 and 3. The inputtransmit RF signal is split eight ways in the Hub Shelf. Each of these signals is routed to a Hub TransceiverPlug-In where it is split in two and each path modulates the optical output of a solid state laser diode. Thisoptical output is routed through asinglemode optical fiber to one RemoteTransceiver. The photodiode in theREMOTE TRANSCEIVER detects thisoptical signal and outputs a proportionalelectrical current. This current is accoupled and passed through a load torecover the RF signal. The RF signal isamplified, filtered and output to theantenna. The output RF signal pathincludes a variable attenuator to adjustthe output level for optimum coverage.The RF subcarrier is detected at thephotodiode output. This level is used bythe transmit AGC to set the downlinkgain. The subcarrier is also amplified andinserted into the uplink path. This signalis detected at the Hub Shelf Plug-In forthe uplink AGC and Node FunctionAlarm. A failure of any amplifier in thedownlink path in the Remote Transceiver,shuts off the subcarrier in the return pathwhich, in turn, triggers the Node FunctionAlarm at the Hub.The receive or uplink RF signal from theantenna is filtered and amplified thenrouted to the Remote Transceiver laser.A fast ALC is included in this path whichprevents RF overdrive damage to thelaser while recovering fast enough tominimize blocking for TDMA and GSMsignals. The laser output in the RemoteTransceiver is then modulated by thereceive RF signal and is transmittedthrough another singlemode optical fiberback to the Hub Shelf Plug-In. Each of thetwo photodiodes in the Hub TransceiverPlug-In recovers the RF signals fromeach of two Remote Transceivers. Thepilot tone on each signal is split off anddetected. This is used for the NodeFunction alarm. This LED is normallygreen and turns red if the pilot tone is notdetected. This alarm also appears at the

1-6Hub Shelf rear panel DB37 connector as a TTL level critical alarm. It would also be reported to the NOC orservice technician by the modem card depending on how the user configured the system alarms.The receive RF signal from each photodiode is combined in the HUB TRANSCEIVER Plug-In. Thesecombined outputs are combined again in the and output to the rear panel RF uplink connectors. The Hub Shelfis divided into two halves. The RF signals from each half are combined and routed to separate rear panel Nconnectors. The combined uplink signals from one half can be routed to the BTS main receive port while theother RF output is routed to the BTS receive diversity port. This method provides an overall 3 dB systemsensitivity improvement compared to routing all of the uplink signals into one receive port (see Figure 2).Alternatively, both outputs may be combined and routed to a single BTS receive port.

1-71.3 SpecificationsDescriptionThis specification defines the uplink and downlink performance of the OfficeCell Fiberoptic Antenna System.The terminal equipment consists of the Remote Transceiver and the Hub Transceiver Plug-In. The latter isinstalled in the Hub Shelf. This system meets and exceeds the requirements for GSM900, GSM1800 andGSM1900 Class M3 micro-BTS as well as IS-136 TDMA and IS-95 CDMA for wireless PBX, in-buildingand campus coverage applications.There are four frequency options for the OfficeCell: 850 MHz (AMPS), GSM900, GSM1800 and PCS1900.There are two downlink output power options: the P1 power option meets GSM 900 micro-BTS M3requirements and is available for the 850MHz and 900MHz versions only. The P2 power option meetsmicro-BTS M3 requirements for 1800MHz and 1900MHz. For 850MHz and 900MHz, the High Power meetsGSM micro-BTS power class M1 requirements and IS-136 in-building requirements for +20 dBm compositepower. All of these system standards specifications are met for optical loss of up to 4 dB.RF Parameters (up to 4 dB optical loss)UplinkFrequency Range 850 MHz 824 - 849 MHzGSM900 890 - 915 MHzGSM1800 1710 - 1785 MHzPCS1900 1850 - 1910 MHzAmplitude Flatness824 – 849, 890 - 915 MHz; Full band ± 1.5 dB (Any 15 MHz band) ± 1.0 dB1710 – 1785, 1850 - 1910 MHz; Full band ± 2.5 dB (Any 15 MHz band) ± 1.0 dBNoise Figure ≤ 13 dBLow Noise Option ≤ 7 dBInput Third Order Intercept (IIP3), 2 carriers, -43 dBm/carrier ≥ -15 dBmLow Noise Option ≥ -25 dBmLink Gain (with external 20 dB attenuator; 30 dB attenuator with Low Noise Option) 824 - 915 MHz 4 ± 1 dB1710 - 1910 MHz 4 ± 1 dBUplink Input ALCInput RF Threshold - 25 dBmLow Noise Option -35 dBmRange 30 dBResponse Time < 5 µsec w/o ringingGain Stability ± 1 dBInput/Output Impedance 50 ΩInput/Output VSWR ≤ 2 : 1DownlinkFrequency Range 850 MHz 869 - 894 MHzGSM900 935 - 960 MHzGSM1800 1805 - 1880 MHzPCS1900 1930 - 1990 MHzAmplitude Flatness

1-8869 – 894, 935 - 960 MHz; Full band ± 2.5 dB(any 15 MHz band) ± 1.0 dB1805 – 1880, 1930 - 1990 MHz; Full band ± 2.5 dB(any 15 MHz band) ± 1.0 dBOutput Noise ≤ -92 dBm/HzOutput Third Order Intermodulation Product(Interfering CW carrier 30 dB below main carrier,for single carrier at max output power) ≤ -38 dBm2 Equilevel Carriers at +17 dBm/carrier ≤ -42 dBcOutput Power, Maximum (dBm)Std Single Carrier 2 Equilevel Carriers(Power/Carrier)GSM +14 +5IS-136 +12 +9P1CDMA +4 +1GSM +22 +13IS-136 +20 +17P2CDMA +12 +9Output Power Range ≥ 12 dB user adjustable (in 2 dBincrements at TR102 RemoteTransceiver)Input Power Threshold for Input Power Protect 8.5 to 11.5 dBmAttenuation Step for Input Power Protect 10 dBGain at Maximum Output Power (output attenuator set at min)Output Power Option P1 2 ± 1 dBOutput Power Option P2 14 ± 1 dBGain Stability ± 1 dBInput/Output Impedance 50 ΩInput/Output VSWR ≤ 2 : 1GeneralLoop back Carrier Frequency 99 MHz ± 10 MHzOptical ParametersWavelength 1310 ± 20 nmOutput PowerRemote Transceiver 1.8 mWHub Transceiver Plug-In 1.8 mWOptical ConnectorHub Shelf SC/UPC, > 50 dB return lossRemote Transceiver Optoclip II®, > 55 dB return lossFiber SinglemodeAbsolute Maximum RatingsRF Input PowerUplink +5 dBmLow Noise Option -5 dBmDownlink +26 dBm totalPhotodiode Input Optical Power +2.3 mW

1-9ElectricalRemote Transceiver +12 V to +24 V, 12 W (singleband), 20 W (dual band)Remote Power Supply 100 to 240 VAC, 47 – 63 HzHub Transceiver Plug-In 6 WHub Shelf 100 - 240 VAC, 47 - 63 Hz

1-10MechanicalRemote Transceiver See outline drawing below

1-11Hub Shelf Plug-In (HUB TRANSCEIVER) Plug-in card with 5.06” H x 1.2” W frontpanel for HUB SHELF Chassis.Hub Shelf (HUB SHELF) 19”, 3U (5.25”) H, 15.75” D rack mount

1-12

1-13Alarms and MonitorsRemote TransceiverDescriptionPower On (Green LED)Laser Optical Power Low Alarm (active if laser output < 90% of factory set point:Red Front panel LED)Received Optical Power Low Warning (active if optical loss > 4.2 dB: Yellowfront panel LED)Transmit Amplifier Failure Alarm (active if any amplifier in transmit path fails asdetected by bias current: Red LED. Also causes shutoff of subcarrier in uplink pathwhich triggers Node Function Alarm at plug-in.)Hub Transceiver Plug-In Node Function (loopback carrier detect:Front panel LED; normally Green, Red if RFsubcarrier level drops more than 10 dB)Received Optical Power Low Warning(active if optical loss > 4.2 dB: Yellow frontpanel LED, normally OFF)Laser Optical Power Low Alarm (active iflaser optical output power drops 10%): RedFront panel LED, normally OFF)Hub ShelfLEDs Power On (Green, Normally ON)Main Power Alarm (Red Front panel LED;normally OFF)Backup Power Alarm (Red Front panel LED;normally OFF)Battery Alarm (Yellow front panel LED,active if battery backup charge is low;normally OFF)Alarms, Rear Panel DB-37 (See Table) Critical Alarms: these include all NodeFunction Alarms and the Main and BackupPower Supply Alarms.Summary Contact Closure Alarm: active ifany alarm is active in chassis or plug-ins.RepeaterNet Any critical alarm prompts the system to dial upRemote Power Supply NOC. This is configured atinstallation with a laptop computer via the front panelCraft interface. Dial up connection is made with RJ-11interface on rear panel. The system may also be polledthrough dial up connection to get status of all alarmsand warnings.Craft Interface (Front Panel) Used to set up RepeaterNet interface.Includes setting telephone number of master Hub Shelfas well as the NOC or service pager. Also configuresHub Shelf as master or slave. Master provides dial up

1-14connection for itself and daisy-chained slave units.Connection to slave units via RJ-45 jacks on rear.DB-37 Pin Signal name Type Sense1 1-A Node Function Alarm TTL Active Low2 2-A Node Function Alarm TTL Active Low3 3-A Node Function Alarm TTL Active Low4 4-A Node Function Alarm TTL Active Low5 5-A Node Function Alarm TTL Active Low6 6-A Node Function Alarm TTL Active Low7 7-A Node Function Alarm TTL Active Low8 8-A Node Function Alarm TTL Active Low9 Master P.S. Alarm TTL Active Low10 Battery Alarm TTL Active Low11 n.c. 12 n.c. 13 n.c. 14 n.c. 15 RTN 16 RTN 17 RTN 18 n.c. 19 n.c. 20 1-B Node Function Alarm TTL Active Low21 2-B Node Function Alarm TTL Active Low22 3-B Node Function Alarm TTL Active Low23 4-B Node Function Alarm TTL Active Low24 5-B Node Function Alarm TTL Active Low25 6-B Node Function Alarm TTL Active Low26 7-B Node Function Alarm TTL Active Low27 8-B Node Function Alarm TTL Active Low28 Back-up Power Supply Alarm TTL Active Low29 n.c. 30 n.c. 21 n.c. 32 n.c. 33 n.c. 34 Summary Alarm N.C. Relay contact Connect to Common if O.K.35 Summary Alarm Common Relay contact 36 Summary Alarm N.O. Relay contact Open if O.K.37 n.c.

1-15EnvironmentalOperating (ETSI EN 300 019-1-3)Temperature Range +5 to +45ΕCRate of Temperature Change 0.5 °C/minuteRelative Humidity 5 to 85% RH, non-condensingStorage and Transportation(ETSI 300 019-1-1 STORAGE, class 1.2)(ETSI 300 019-1-2 TRANSPORTATION, class 2.3)Temperature Range -40 to +70°CRate of Temperature Change 0.5°C/minuteRelative Humidity 10 to 100%Vibration (Storage)Vibration Test (Transportation)Shock Test (Transportation)Drop Test (Transportation)Free Fall 30 - 40 0.4 1 on each face or 2 in normal attitudeFree fall 40 - 50 0.3 1 on each face or 2 in normal attitudeRegulatory UL, CSA, FCC TypeAcceptance for 800 MHzand PCS versions.CE Mark for GSM900 andGSM1800 versionsPARAMETER FREQUENCY RANGE SEVERITY DURATION(Hz) Vel; mm/s Accel; m/s2Sinusoidal 5 – 62 5.0 3x5 sweep cyclesSinusoidal 62 - 200 2 3x5 sweep cyclesPARAMETER FREQUENCY RANGE SEVERITY DURATION(Hz) ASD: m2/s3Rolloff: dB/octRandom 5 – 20 0.96 3 x 10 minsRandom 20 - 500 -3 3 x 10 minsPARAMETER SHOCK SPECTRUM SEVERITY DURATION(Hz) Accel: m/s2Number msShock (m≤100kg) Half Sine 400 500 in each of6 directionsor1000 innormalattitude6PARAMETER MASS DROP HEIGHT NUMBER OF DROPS(kg) (m)Free Fall < 30 0.5 1 on each face or 2 in normal attitude

2-12 Installation2.1 General ProcedureBefore installing and, in fact, before even receiving the OfficeCell units, one can have the fiberoptic cablesinstalled and tested. The network planning has been completed which has determined the type, number andlocation of Remote Transceivers needed for optimum coverage and capacity.Install and check the fiberoptic cables first. Use any high quality, telcom grade singlemode fiberoptic cable.The OptoClip II optical connectors are installed easily on site (contact Molex or Huber+Suhner forinstallation kits and training for the OptoClip II). General practice is to terminate the fiberoptic cables at apatch panel near the Hub Shelf. In this case, optical jumper cables will be needed to make the connectionbetween the patch panel and the Hub Shelf. These jumpers will be terminated with an OptoClip II connectorat one end and an SC/UPC at the other.! Make sure to specify SC/UPC, not SC/PC. The standard SC/PC has an optical return loss < 27 dBwhich can cause degradation of the system noise performance. SC/UPC specifies an “ultra” polish fora return loss > 50 dB.During this process, label each cable at each end to indicate whether it is transmit or receive and whichRemote Transceiver it is associated with. It is good practice to pull one or two additional fiber pairs to eachRemote Transceiver to allow for future expansion. Next, mount the Hub Shelf in the rack and connect thefiberoptic cables. Do not connect the RF cables yet.Mount the Remote Transceivers. Install the wall mounting brackets first. For mounting above a false ceiling,orient the bracket so that the end of the Remote Transceiver with the connectors is pointing downwards.When mounting inside the room, place the Remote Transceiver near the ceiling with the connectors pointingupwards. This permits the most aesthetic routing of the cables. The plastic cover on the Remote Transceivermay be removed by loosening the four screws on the back of the Unit. This permits the user to paint the coverto match the room décor. If the REMOTE TRANSCEIVER is to be installed with the Remote Power Supply,install the two mounting brackets next to each other linking them with the connector piece supplied with thepower supply mounting bracket. This will give the most aesthetic mounting with the proper spacing for aneasy DC power connection. Orient the bracket so that the threaded tab will be at the same end as theconnectors on the REMOTE TRANSCEIVER. Place the REMOTE TRANSCEIVER so that the rear panelstuds slide into the keyhole slots on the mounting bracket. Secure the unit by tightening the captivethumbscrew on the REMOTE TRANSCEIVER to the threaded hole in the mounting bracket. The RemotePower Supply installs in the same way. For the Remote Power Supply, if the red NO AC LED is on, press thereset switch located next to the AC power connector which turns off the battery backup (when the mains isnot connected). For AC powered units, connect the AC power cords to the building mains according to localbuilding electrical codes. Connect DC power to the REMOTE TRANSCEIVER by connecting the shieldedcable with the twinax termination to the DC input connector on the REMOTE TRANSCEIVER.Mount the indoor coverage antenna to the ceiling or wall as needed and connect it to the Remote Transceiverwith a flexible RF cable. The RF cable must have an SMA male connector for the connection to the RemoteTransceiver. If the antenna has a different RF connector, say, N or TNC, an RF adapter must be used. Plug inthe transmit (downlink) fiberoptic cable connector into the OPTICAL IN on the Remote Transceiver and thereceive (uplink) fiberoptic cable connector into the OPTICAL OUT (Green) on the Remote Transceiver.From the initial network design, the output power required from each Remote Transceiver should be known.This can be preset before power is turned on by turning the Output Power adjustments on each Remote

2-2Transceiver. From the maximum output power rating for each Remote Transceiver, the power can be reducedin 2 dB using the indented potentiometer.Turn the power on to the Remote Transceivers and on the Hub Shelf. Proper operation of the optical systemis indicated by a green Node Function LED on each of the Hub Transceiver Plug-Ins that is connected to anactive Remote Transceiver. All other alarm indicators should be OFF. A yellow LED at the plug-in or at theRemote Transceiver indicates that the optical loss in that path is > 4 dB and is, therefore, out of the range ofthe guaranteed specification.Before connecting the Hub Shelf to the BTS or Repeater, check that the RF transmit power from the source(BTS or repeater) is within the safe operating range of the OFFICECELL and that it is at the level requiredfor proper noise and distortion performance according to the network design (see Table 1).Table 1. Transmit (Downlink) Input RF Levels/carrierGSM (05.05) TDMA (IS-136) CDMA (IS-95)+12 dBm, 1 carrier +11 dBm, 2 carriers +3 dBm, 1 carrier800MHz/900MHzPower P1 (2 dB gain) +4 dBm, 2 carriers +8 dBm, 4 carriers 0 dBm, 2 carriers+8 dBm, 1 carrier +3 dBm, 4 carriers -2 dBm, 1 carrier-1 dBm, 2 carriers 0 dBm, 8 carriers -5 dBm, 2 carriersGSM1800/1900MHz,800MHz/GSM900Power P2 (14 dB gain) -4 dBm, 4 carriers -3 dBm, 10 carriers -8 dBm, 4 carriersConnect the RF cables between the BTS or repeater and the Hub Shelf. The Remote Transceivers and theplug-ins have been calibrated at the factory and the optical loss compensation in each Remote Power Supplyand plug-in automatically equalizes the gain in each link so that the specified link gain is always met. Thesystem is now operational and no further adjustment is necessary.

2-3

2-42.2 Install Fiberoptic CablesOnce the location for each of the Remote Transceivers has been determined, the fiberoptic cable can beinstalled between the Hub Shelf and these locations. The cable length can be up to 5 km.You need to know the following:Optical Fiber Singlemode, 1310nm wavelengthOptical Loss Good quality fiber should have an optical loss of <0.4 dB/km at 1310nm. There will be additional opticalloss due to connectors and splices but there should beno more than about 0.5 dB loss through a connectormating (optical connections are sexless) and lessthrough a splice.Optical Connectors OptoClip II® connectors. These connectors are easilyinstalled on site. Contact Molex or Huber+Suhner forinstallation kits and training. The Hub Shelf usesSC/UPC connectors so an OptoClip-to-SC/UPCadapter must be used. Alternatively, connect the HubShelf to an OptoClip patch panel using optical jumperswith an OptoClip termination at one end and anSC/UPC termination at the other. IMPORTANTNOTE: MAKE SURE TO USE AN SC/UPCTERMINATION: THIS CONNECTOR IS AN“ULTRA-POLISHED” CONNECTOR WITH ANOPTICAL RETURN LOSS > 50 dB. A STANDARDSC/PC TERMINATION HAS A HIGH RETURNLOSS AND WILL DEGRADE LINK NOISE ANDLINEARITY PERFORMANCE.Once the cable has been installed, the installer should check the quality of the optical path using an OpticalTime Domain Reflectometer (OTDR). This will check the optical path loss and the magnitude and location ofany reflections. The total return loss should be > 45 dB.While checking the cables in this way, it is useful to label each cable near the connector as to which RemoteTransceiver it is for and whether it is for the transmit or receive path. Labelling the cable in this way permitscomplete interconnection during installation with the system powered off. Otherwise, the RemoteTransceivers will have to be installed with the Hub Shelf power on with all fiberoptic cables connected to it.This allows the installer to check which fiber is transmit by using an IR sensitive card (see RecommendedTools).2.2.1 Minimizing Optical ReflectionsAs discussed in the Functional Description, optical reflections can degrade the noise and linearity of afiberoptic link. In particular, reflections that reach the laser can be a problem. Keep all discrete reflections to> 45 dB. For the Hub Shelf, the SC/UPC connectors are polished to a return loss >50 dB. At the RemoteTransceivers, the OptoClip connectors have a return loss of > 55 dB.

2-52.2.2 Cleaning Optical ConnectorsOptical reflections from a discontinuity such as a poor connector interface appear on an RF spectrumanalyzer trace as stable variations in the noise floor amplitude that are periodic with RF frequency. If thereflection is bad enough, it could impact the system performance. By far, the most common cause for a largediscrete reflection is a dirty optical connector. Remember that the optical aperture at the tip of the fiberopticconnector is only 9 :m in diameter. A bit of dust or oil from a finger can easily interfere with or block thislight. Fortunately, it very easy to clean the connector. The procedures are indicated in the Figure. Be sure touse the correct procedure for the given connector. When disconnected, cap the SC/UPC connector to keep itclean and prevent scratching the tip of the ferrule. The OptoClip is “self-capping”.Figure1. Keeping the tip of the optical connectors clean is a simple way to ensure optimum systemperformance.

2-62.3 System AlarmsThe OfficeCell has three ways of indicating alarms.1. LEDs: the Hub Shelf and the Remote Transceiver have status indicators for power on and alarmconditions.2. Hub Shelf Rear Panel DB37 Connector: The “critical” alarms are available here as TTL levels.In addition, three pins provide a contact closure summary alarm (see Alarms in thespecifications).3. Modem connection: The system status may be monitored locally with a computer through thefront panel Craft port. The main purpose of this port is to set the system initially. This includesspecifying which alarms are critical, setting the local system telephone number and specifyingthe action to be taken when there is a critical alarm (dial up the NOC or a service technician’spager). With the RepeaterNet OA&M software, up to 5000 systems can be Remote PowerSupplyly monitored.Using the alarms provided, the cause of a critical failure can be determined with high confidence. Forinstance, if the Node Function alarm is associated with a Plug-In laser alarm, the Plug-In has failed and mustbe replaced. If the Node Function alarm is associated with a Received Optical Power Low at the Plug-In,either the Remote Transceiver laser has failed or the fiberoptic cable has been broken or damaged. Theservice technician would come with a replacement Remote Transceiver. If, upon inspecting the RemotePower Supply in question, the LEDs indicate no failure, the fiber path would have to be inspected. Thisshould be relatively easy to track down since damage would have to be associated with some other workgoing on at the site or someone had deliberately disconnected the optical cable from the unit. Finally, a NodeFunction alarm not associated with any other alarm at the Hub Shelf would indicate a failure of the RemoteTransceiver downlink amplifier chain. This would be confirmed by inspection of the Remote Power Supplyin question for that particular LED. The complete troubleshooting matrix is given at the end of this manualand can be used to program the OA&M software to recommend the proper action to be taken.2.4 Hub Shelf and Remote Power Supply Battery Charge Monitoring andBattery ReplacementBoth the Hub Shelf and the Remote Power Supply have a battery backup. While connected to mains power,the battery is kept charged by a charging circuit. Once AC mains power is first connected, the charging circuitwaits 48 hours before starting the battery test circuit. This circuit checks to open circuit battery voltage everyten seconds. Once the circuit detects the battery voltage drops below approximately 12 Volts, the BATTLOW alarm is activated. At the beginning of life, the battery provides approximately 15 to 20 minutes ofsystem backup. At end of life, the backup time is about 8 to 10 minutes. It is expected that the batteriesshould be replaced every 1.5 to 2 years.2.4.1 Replacing the Hub Shelf BatteryThe battery must be replaced with the AC mains power off.1. Turn off the AC mains power (rear panel switch)2. Disconnect AC mains power cable

2-73. Press the BATT OFF switch on the rear panel to switch off the battery power to the Hub Shelf4. Pull the Hub Shelf out of the rack from the front on the chassis rack mount slides. Be careful notto pull on rear panel cable assemblies, especially the fiberoptic cables.5. Remove the Hub Shelf top cover.6. Locate the battery on the left behind the power supplies.7. Remove the battery bracket by loosening the screws. Lift off the bracket.8. Disconnect the battery terminal wires by pulling them off.9. Lift the battery out.10. Install the replacement battery by reversing the process.2.4.2 Replacing the Remote Power Supply BatteryThe battery must be replaced with the AC mains power off.1. Disconnect the AC mains power cable.2. Press the BATT OFF switch on the power supply to switch off the battery power.3. Disconnect the DC power connector from the Remote Transceiver.4. Loosen the thumbscrew that secures the power supply to the mounting bracket.5. Slide the power supply housing so as to release from the mounting bracket keyhole slots.6. Remove the smaller cover on the back of the housing (the far end from the connectors).7. Lift out the battery and pull off the terminal wires.8. Install the replacement battery by reversing the process.2.5 Installation ChecklistOnce the fiberoptic cable has been installed properly, the OfficeCell installation and set up is simple.2.5.1 Inspect Received ItemsPacking List Checklist (as applicable)!Hub Shelf w/mounting hardware and AC power cord! Hub Transceiver Plug-In (s); these are installed in the chassis unless they are spares! Plug-In Termination Cards: these are plug-ins behind blank front panels installed on unused slots.They provide 50Ω RF terminations to the internal RF splitters and combiners ensuring a balancedload.! Two 1:2 RF splitter/combiners (supplied with the Hub Shelf)! Remote Transceiver (s): These will be in a separate box.! Remote Power Supplies (not included if user is supplying DC power to REMOTETRANSCEIVER).! Mounting Brackets for REMOTE TRANSCEIVER and REMOTE POWER SUPPLY. Included withREMOTE TRANSCEIVER and REMOTE POWER SUPPLY.!1 Operating ManualInspect all received items thoroughly. If any item has been damaged during shipping, report it tothe shipping company and to Repeater Technologies in the U. S. at 408-747-1946. Also, contact thefactory immediately if any item is missing.

2-82.5.2 Recommended Tools!OptoClip II installation kit!Fiberoptic Connector Cleaning Kit: For the SC/UPC: cotton swabs, alcohol, For the OptoClip:OptoClip cleaning tool!IR sensitive card: used to detect active laser port and active fiber. (eg. Quantex Model Q-42-R)!Small screwdriver or Adjustment Tool for transmit output power potentiometer! Screwdriver for mounting chassis in rack and Remote Transceivers on the wall! 4 #6 panhead or M3.5 mounting screws for each Remote Transceiver.! Appropriate screws, washers and mounting hardware for rack mounting the Hub Shelf.2.6 Installing the Hub ShelfThe Hub Shelf mounts in a standard 19 inch rack close to the RF source (BTS or repeater). The chassisshould be supported at the sides as well as from the front flanges. The HUB SHELF 3U high chassis isavailable with rails. Before turning on the AC (or DC) power to the chassis, connect the fiberoptic cables atthe rear panel.During installation of the fiberoptic cables, each fiber should have been labelled as to which RemoteTransceiver it is to be connected to and whether it is for transmit or receive. The transmit or downlink fibersare connected to the optical outputs on the rear panel. These are the red connectors with the laser lightwarning labels. Make sure that the connectors used are associated with an active plug-in installed in thechassis.For ease of installation, the cable has been terminated with the OptoClip optical connector. The opticalRFIN RFINRFOUT RFOUTAlarmsOIThe cable clamps at each cornerof the rear panel ease cablemanagement and help protectthe optical connectors from unduestrain.The minimum bend radius ofthe fiber is 2 inches (5 cm). Donotkinkthefiber.The optical connector for thetransmit (downlink) pathis red with the laser warninglabel. The black connectoris for the receive path.Figure 0. Connecting Fiberoptic Cables to Hub Shelf.

2-9connectors for the Hub Shelf are SC/UPC so an OptoClip-to-SC/UPC adapter must be used. Alternatively,use optical jumpers with an SC/UPC termination at one end and an OptoClip at the other to connect the HubShelf to an optical patch panel (recommended). First, clean the tip of the connector on the cable according tothe procedures in 2.2.2 above. Lift the spring loaded cover on the Hub Shelf rear panel connector and push inthe SC/UPC cable connector until firmly seated (the connector may or may not “click” into place; do not pushtoo hard). You may want to use the cable clamps located on the four corners of the rear panel to manage andprotect the cables.The front panel of each Plug-In has two 1.75” x 0.5” (4.4 cm x 1.3 cm) outlines labelled A and B which canbe used to affix standard “address” size labels (Avery 5167) to designate which Remote Transceiver isconnected to that path.Do not connect the RF cables yet.If more than one Hub Shelf is being used, connect the SERIAL DATA ports together using CAT-5 jumperswith RJ-45 connectors. The two SERIAL DATA ports on the rear panel are coonected together; two areprovided to permit the use of simple jumpers when daisy-chaining several units.Connect the LINE port to a POTS telephone jack for the dial-up modem connection.If it is being used, connect the chassis to the local OA&M interface by way of the 37 pin D-Sub connector onthe rear panel of the Hub Shelf (see section 2.3: System Alarms).Turn on the chassis power. Powering up the chassis will “light up” the fiber allowing those installing theRemote Transceivers to identify the transmit and receive cables using an IR sensitive card (seeRecommended Tools) to see which fiber is emitting light. The fiber emitting light at the Remote Transceiverend is the transmit path and is connected to the OPTICAL IN connector on the Remote Transceiver (afterproper cleaning; see section 2.2.2).If the transmit RF signal from the BTS or repeater is to be routed to all the plug-ins in both sides of the HubShelf, connect the external 1:2 RF splitter supplied with the Hub Shelf to both RF IN ports on the rear panel.If the receive RF signals from all of the plug-ins in both halves of the Hub Shelf are to be routed to a singlereceive port on the BTS or repeater, connect the other 2:1 RF combiner to both of the RF OUT ports on therear panel. If one of the RF OUT ports is to be connected to the BTS or repeater receive diversity port, donot connect the RF combiner.Connect the RF OUT to the BTS or repeater receive port(s).Before connecting the RF transmit cables from the BTS or repeater to the RF IN of the Hub Shelf, verify thatthe BTS or repeater RF output power levels are consistent with the desired output power at the RemotePower Supply and will not overdrive or damage the OfficeCell Plug-Ins. Connect the BTS or repeater RFtransmit cables to the Hub Shelf.2.7 Installing the Remote TransceiversEach Remote Transceiver is mounted above the false ceiling against the wall with the connectors pointingdown for easy access. In an area with no false ceiling, it can be mounted in the room near the ceiling with theconnectors pointing up. This permits a more aesthetic routing of the cables in the wall-ceiling corner. TheREMOTE TRANSCEIVER is connected to the Hub Shelf with a singlemode fiberoptic cable with amaximum optical loss of 4 dB, including connectors and patch panels.! The minimum bend radius of the fiber is 2 inches (5 cm). Be careful not to kink the fiber.

2-10To mount the Remote Transceiver, first install the mounting bracket. Two mounting brackets are available.One is smaller and accomodates a single Remote Transceiver. The other, larger bracket accomodates oneRemote Transceiver and one Remote Power Supply. The bracket is attached to a wall or bulkhead using #6pahhead or M3.5 screws. The Remote Transceiver (and Power Supply, if applicable) are mounted on thebracket by inserting the rear panel studs into the keyhole slots in the bracket. Each Unit is secured to thebracket by threading the captive thumscrew (located at the connector end of the unit) into the threaded hole inthe tab on the bracket. See the figures below for more detail.The Remote Transceiver takes +15 to +24 VDC power through a field-installable Molex connector. If theRemote Power Supply is being used, the DC connection is provided by simply plugging in the DC cable fromthe REMOTE POWER SUPPLY to the REMOTE TRANSCEIVER. The REMOTE POWER SUPPLY shouldbe powered through a sheilded AC power cable installed according to local building codes.For DC versions , the terminals can take wires 18 AWG to 14 AWG. The choice will depend on the voltageused and the distance from the power supply (see Specification, Electrical).Next, install the indoor coverage antenna according to the manufacturer’s instructions. Connect the antenna tothe Remote Transceiver RF SMA connector using a flexible RF cable with VSWR < 1.5 : 1 at the frequenciesin use.! RF SMA connectors should be tightened with a torque wrench set to 8 in-lbs. Do notovertighten!Figure 3. Mounting the Remote Transceiver: Mounting Bracket.Any antenna connected to this device must result in an ERP < 1.5W(800 and 900MHz) or <3.0W (1800MHz and 1900MHz)!

2-11Connect the optical cable. The fiber for the transmit (downlink) path connects to the OPTICAL IN connector.The fiber for the receive (uplink) path connects to the OPTICAL OUT connector (Green with laser DANGERlabel). The fibers should be labelled accordingly during installation of the fiberoptic cables. If not, they canbe identified by turning the Hub Shelf power on with the plug-ins and fiberoptic cables installed. Then, usean IR sensitive card (see Recommended Tools) to detect the light emitted from the transmit fiber. Point theoptical connector on each fiber at the card to see which fiber is emitting light (you see a glowing spot on thecard). This is the fiber for the transmit path. The other is for the receive path.Knowing the desired output power level from each Remote Transceiver as determined by the network design,the Output RF Power can be preset before the system is powered up. Given the rated maximum power fromthe Remote Transceiver, the antenna gain an the loss in the RF cable, the output RF power is maximum whenthe Output Power adjustment is set at 0. The static output power can be reduced by turning the adjustment.The adjustment is indented and each indent changes the output power by 2 dB.Once all connections have been made, turn on the AC power (or DC power, depending on the option used) toHub Shelf and Remote Transceivers. Before connecting the transmit RF input from the source, check that thelevel is that needed for optimum signal to noise and distortion as determined in the network design (see Table1 above). Connect the RF cables to the Hub Shelf.WARNING: Do not look directly into the end of the fiberoptic connector. Laser lightis invisible and can cause eye damage.! To prevent damage to the Hub Shelf plug-ins, do not exceed the maximum ratings for RF input tothe Hub Shelf !

3-13 Monitoring and Troubleshooting3.1 Field Support NumbersThe tips given below should help pinpoint most link problems. Often, problems are a result of a poor opticalinterface which is easily fixed by properly seating a connector or cleaning the connector. There are no userserviceable parts in the OFFICECELL. Faulty units must be returned to Repeater Technologies Inc. for repairor replacement. For technical support call 800-938-1901 in the U. S. or 408-747-1946.

3-23.2 Troubleshooting TipsAlarms Probable Cause Action*Node Function 1. Remote Transceiver Downlink Txamplifier chain failure2. Pilot tone oscillator malfunction3. Pilot tone detector malfunction1. If Remote Transceiver RcvdOpt Pwr LED is OFF, thisindicates downlink amplifierchain failure: replace RemoteTransceiver.2. Repair/replace failed Plug-In3. Repair/replace failed Plug-In1. Node Function2. Received Opt PwrLow (RemoteTransceiver)1. Problem in downlink fiber path:optical loss too high: fiber run istoo long, connector not seatedproperly, damaged or in need ofcleaning, damaged splice2. Remote Transceiver photodiodefailure1. Check Rcvd OpticalPower LED at RemoteTransceiver. If active(Yellow), disconnectdownlink fiber and checkoptical output with lightsensitive card. If no lightdetected, inspect fiberpath, esp. any connectorrecently disconnected.Inspect for properseating. Cleanconnectors. If necessary,disconnect fiber fromOFFICECELLand checkfiber path with OTDR tolocate problem.2. If fiber is OK, indicatesRemote Transceiverphotodiode failure:replace RemoteTransceiver.1. Node Function2. Received Opt PwrLow (Plug-In)1. Remote Transceiver laser failure2. Problem in uplink fiber path:optical loss too high: fiber run istoo long, connector not seatedproperly, damaged or in need ofcleaning, damaged splice3. Plug-In photodiode failure1. Check Laser Alarm inRemote Transceiver. Ifactive (Red), replaceRemote Power Supply.2. If not, inspect fiber path,esp. any connectorrecently disconnected.Inspect for properseating. Cleanconnectors. If necessary,disconnect fiber fromOFFICECELLand checkfiber path with OTDR tolocate problem.3. Replace Plug-In

3-31. Node Function2. Received Opt PwrLow3. Laser Pwr Low (bothHub Shelf Plug-In andRemote Transceiver)Failing or failed Plug-In laser Replace Plug-InLaser Pwr Low (HubShelf Plug-In) Failing laser Replace unit Hub Shelf Plug-In1. Laser Pwr Low (eitherin Hub Shelf Plug-In orRemote Transceiver)2. Received Opt PwrLow (opposite end)Failing laser Repair/replace unit (Hub ShelfPlug-In or Remote Transceiver)Received Opt Pwr Low(Hub Shelf Plug-In) 1. Failed/failing laser in RemoteTransceiver2. Optical loss too high, link may notbe operating withinspecifications. Fiber path may betoo long. Problem in fiber path:connector not seated properly,damaged or in need of cleaning,damaged splice1. Inspect RemoteTransceiver for LaserAlarm LED on (Red). Ifso, replace RemoteTransceiver2. Inspect fiber path, esp.any connector recentlydisconnected. Inspect forproper seating. Cleanconnectors. If necessary,disconnect fiber fromsystem and check fiberpath with OTDR tolocate problem.Hub Shelf: Main PowerAlarm Main Power Supply Failure (voltagedropped more than 1 V from +15V) Replace Main Power SupplyHub Shelf: BackupPower Supply Alarm Backup Power Supply Failure (voltagedropped more than 1 V from +15V) Replace Backup Power SupplyBattery Alarm 1. During battery only operation thiswould be normal after unit has been onfor 10 to 20 minutes. Should go offafter main power is restored andbattery charges up.2. If main and/or backup power suppliesare OK, this indicates battery orrecharging circuit failure1. No Problem2. Replace Chassis* All repairs of OFFICECELL components must be performed by the factory