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Watkins-Johnson Company

Repeater

Manual

WATKINS-JOHNSON COMPANY
3333 Hillview Avenue
Palo Alto, CA 94304-1223

Summary of Contents for R1910

Page 1: ...W Watkins Johnson Company Repeater Manual WATKINS JOHNSON COMPANY 3333 Hillview Avenue Palo Alto CA 94304 1223 ...

Page 2: ...ve right of dissemination reproduction manufacture and sale This drawing print or document is submitted in confidence for consideration by the designated recipient or intended using organization alone unless permission for further disclosure is expressly granted in writing 09 99 WATKINS JOHNSON COMPANY 3333 Hillview Avenue Palo Alto CA 94304 1223 800 951 4401 Internet http www wj com ...

Page 3: ...on 2 3 Repeater Initial Turn On Procedure 2 6 Setup 2 6 Isolation and Alignment Procedure 2 7 Multicarrier FCC Spurious 2 9 Connectors 2 10 Storage 2 11 Packing for Reshipment or Storage 2 11 Chapter 3 Operation 3 1 Introduction 3 1 Operating Instructions 3 1 Chapter 4 Scheduled Maintenance 4 1 Introduction 4 1 Scheduled Maintenance Action Index 4 1 Equipment Required 4 1 Preventive Maintenance Pr...

Page 4: ...he following example Example R1910CAD 1M is a PCS indoor repeater with CDMA modulation using frequency bands A and D 1 25mhz bandwidth with a modem Repeater Model Number Repeater Description R1910 PCS Inbuilding Repeater R1920 PCS High Power Repeater R1930 PCS Medium Power Repeater R1940 PCS Low Power Repeater R810 Cellular Inbuilding Repeater R820 Cellular High Power Repeater Modulation PCS Frequ...

Page 5: ... the first four covering a particular topic for the operation and maintenance of the unit Chapter 5 includes drawings to assist in mounting WJ repeaters The topics are as follows Chapter Topic 1 General Information and Safety Precautions 2 Installation 3 Operation 4 Scheduled Maintenance 5 Drawings ...

Page 6: ...Repeater General Information and Safety Precautions 1 3 Figure 1 1 R1910 and R810 Repeater ...

Page 7: ...Repeater General Information and Safety Precautions 1 4 Figure 1 2 R1920 30 40 R820 Repeater ...

Page 8: ...ctions for the initial inspection and installation of the Repeater It describes the purpose and function of all I O connectors provides initial start up instructions and provides installation verification tests Chapter 3 describes the purpose and function of all remote controls and status indicators and explains how to operate the unit Chapter 4 provides a scheduled maintenance action index and de...

Page 9: ...dB Typical Maximum Input without damage 10 dBm Input Impedance 50 ohms Gain Range 40 dB to 70 dB or 65 dB to 95 dB Gain Steps 2 dB Signal Delay 5 usec max Power 115 230 VAC 60 50 Hz 1 6 0 8 Amps Alarms Status Synthesizer Amplifiers Power Amplifier Output Power Oscillation Interface RS 232 modem optional Control Gain Channel frequency Auto Level Control and Tracking Offset Cooling Convection Temper...

Page 10: ...nce 50 ohms Gain Range 65 dB to 95 dB Gain Steps 2 dB Signal Delay 5 usec max Power 115 230 VAC 60 50 Hz 4 2 Amps Alarms Status Synthesizer Amplifiers Power Amplifier Output Power Oscillation Interface RS 232 and modem Control Gain Channel frequency Auto Level Control and Tracking Offset Cooling Convection Temperature Operating 40 to 50ºC Storage 40 to 85ºC Size 14 5 x 16 x 9 Weight 55 lbs Weather...

Page 11: ...ignal Delay 5 usec max Power 115 230 VAC 60 50 Hz 4 2 Amps Alarms Status Synthesizer Amplifiers Power Amplifier Output Power Oscillation Interface RS 232 and modem Control Gain Channel frequency Auto Level Control and Tracking Offset Cooling Convection Temperature Operating 40 to 50ºC Storage 40 to 85ºC Size 14 5 x 16 x 9 Weight 55 lbs Weather Resistance NEMA 4X Connectors RF Control AC Power Batt...

Page 12: ...ignal Delay 5 usec max Power 115 230 VAC 60 50 Hz 4 2 Amps Alarms Status Synthesizer Amplifiers Power Amplifier Output Power Oscillation Interface RS 232 and modem Control Gain Channel frequency Auto Level Control and Tracking Offset Cooling Convection Temperature Operating 40 to 50ºC Storage 40 to 85ºC Size 14 5 x 16 x 9 Weight 55 lbs Weather Resistance NEMA 4X Connectors RF Control AC Power Batt...

Page 13: ...in Range 40 dB to 70 dB Gain Steps 2 dB Signal Delay 5 usec max Power 115 230 VAC 60 50 Hz 1 6 0 8 Amps Alarms Status Synthesizer Amplifiers Power Amplifier Output Power Oscillation Interface RS 232 modem optional Control Gain Channel frequency Auto Level Control and Tracking Offset Cooling Convection Temperature Operating 10 to 45ºC Storage 40 to 85ºC Size 12 x 16 x 4 Weight 19 lbs Weather Resist...

Page 14: ... max Power 115 230 VAC 60 50 Hz 4 2 Amps Alarms Status Synthesizer Amplifiers Power Amplifier Output Power Oscillation Interface RS 232 modem optional Control Gain Channel frequency Auto Level Control and Tracking Offset Cooling Convection Temperature Operating 10 to 45ºC Storage 40 to 85ºC Size 14 5 x 16 x 10 Weight 55 lbs Weather Resistance NEMA 12 Connectors RF Control AC Power Battery Type N 9...

Page 15: ... operate the equipment 1 3 SAFETY CONSIDERATIONS __________ WARNING To prevent personal injury observe all safety precautions and warnings stated on the instrument and in this manual Specific warnings cautions and instructions are placed wherever applicable throughout this manual These precautions must be observed during all phases of operation service and repair of this unit Failure to comply wit...

Page 16: ...trol and status reporting of the repeater is provided either through an RS 232 serial interface or via modem using a standard POTS line Either interface permits the control of channel frequency and gain and can provide unit alarm status 1 4 2 Prime Power The R1910 and R810 is equipped with a power supply with an input of 115 230 VAC 60 50 Hz 1 6 0 8 Amps Power consumption is approximately 65 Watts...

Page 17: ...al maintenance transportation and handling Temperature ranges can vary between 40 C and 85 C with humidity up to 95 non condensing 1 6 2 Operating Environmental Conditions The R1910 and R810 can be installed and operated in a commercial environment with temperatures varying between 10 C and 45 C The R1920 30 40 and R820 can be installed and operated in an outdoor environment with temperatures vary...

Page 18: ...ls of any shortage The unit was thoroughly inspected and factory adjusted for optimum performance prior to shipment Thus it is ready for use upon receipt After unpacking and checking contents against the packing slip visually inspect all exterior surfaces for dents and scratches If external damage is visible contact Watkins Johnson Company 2 3 PREPARATION FOR USE 2 3 1 Power Requirements The R1910...

Page 19: ...ION INFORMATION 2 4 1 R1910 You will need to know some basic information before beginning the R1910 installation Write this information down you will need it later on 1 Base station location and Channel number to be repeated 2 Reverse Tracking offset in dB Optional 3 Location where the Donor antenna is to be installed 4 Location where the Server antenna is to be installed 5 Phone number of modem l...

Page 20: ...na and route cable from antenna to R1910 location When routing cable be careful not to kink cut or damage cable No lightning suppression is needed if the antenna is indoors or under an overhang Install connector using the appropriate tool and connect to antenna For clearances grounding and mounting requirements please refer to Article 810 of NEC handbook 2 5 3 Proper Weather Sealing of RF Connecto...

Page 21: ...pressor When routing cable be careful not to kink cut or damage cable Install connectors using the appropriate tool and connect to lightning suppressor connector labeled Protected and repeater connector J3 Donor Install connector on cable from Server antenna and connect to repeater connector J4 Server Connect power cord 2 5 5 R1920 30 40 Installation First verify that the repeater to be installed ...

Page 22: ...tronic Systems Co 7040 01 D Joslyn Station Protector Modem Line Surge Protector Joslyn Electronic Systems Co APT NFNF 9 Type N F F RF lightning protection Andrew Corporation Primary protection should be located no further than 12ft away from the unit 2 5 7 Recommended hardware Depending on the type of structure the R1920 30 40 will be mounted to additional hardware may be required Listed below is ...

Page 23: ...nd should be no longer than 140ft For background on the entire installation process please refer to NEC articles 725 and 800 This pertains especially to clearances from power and lightning conductors and transient protection 2 7 2 MODEM INTERFACE For the R1910 connect the 9 pin to phone jack adapter to the J2 Control connector Plug the phone line into the phone jack of the adapter For the R1920 co...

Page 24: ...in setting by 2dB RSS should read minimum d Increase Uplink gain by 2dB RSS should still read minimum e Repeat steps C and D until the maximum gain settings are reached If there is any signal present at RSS or the OSC alarm turns red there is not enough isolation between antennas and you must increase the physical distance between antennas or change the Server antenna direction away from the Donor...

Page 25: ...as reduced received signal strength will occur because the radio link relies increasingly on energy diffracted around the obstructing object rather than direct line of sight radiation Diffraction allows radio signals to propagate behind obstructions Although the received signal strength decreases rapidly as a receiver moves deeply into the obstructed shadowed region the diffraction field still exi...

Page 26: ... each repeater transmits 1 signal See the Figure 1 below Figure 1 Multicarrier for Highest Output Power This arrangement can be expanded to more carriers if necessary Notice how a dual polarized antenna is used for the server This allows you to run each repeater output to the antenna without using a power combiner The 3dB loss of signal power associated with a power combiner is eliminated This met...

Page 27: ...r more signals The inter modulation products that are produced by these signals must be kept to below 13dBm to comply with the FCC Note that the inband spurious may need to be kept below 13dBm in order to comply with an air interface standard You can see from Figure 2 that the amount of equipment necessary is one half that as seen in the multiple repeater deployment Server Donor WJ Repeater AC ...

Page 28: ...tion products below 13dBm outside your licensed band The FCC does not regulate Spurious within your frequency band although your air interface may require that in band spurious levels in your system be kept below a certain level The power of the intermodulation products decreases as the intermodulation product increases A B C See the charts below to ensure that you are not exceeding the FCC requir...

Page 29: ...apart and adequate frequency is left unoccupied between the carrier and the band edge Composite Power Number of Adjacent Signals Minimum number of unoccupied channels to band edge R1920C R1930C R1940C 2 50 3 100 8Watts 4Watts 2Watts Table 2 CDMA Adjacent Spacing If the CDMA signals are NOT adjacently located then you must use the following graphs to determine the maximum output power NOTE These fo...

Page 30: ... 60 5X 4X 3X 2X 1X Multiples of X from carrier to band edge Composite Output Power dBm Two CDMA carriers spaced X MHz apart vs The frequency difference from one carrier to the band edge 36 36 36 31 26 0 10 20 30 40 5X 4X 3X 2X 1X Multiples of X from carrier to band edge Composite Output Power dBm Two CDMA carriers spaced X MHz apart vs The frequency difference from one carrier to the band edge 33 ...

Page 31: ...ier is 1935 0MHz 1930 0MHz 5 0MHz Therefore there are 5 0MHz 2 5MHz 2 multiples of X from the carrier to the band edge Using Chart 1 we see that the composite power must be kept below 34dBm Two TDMA carriers spaced X MHz apart vs The frequency difference from one carrier to the band edge 38 35 32 29 26 0 10 20 30 40 5X 4X 3X 2X 1X Multiples of X from carrier to band edge Composite Output Power dBm...

Page 32: ...ower source 110 VAC 60 Hz to the power supply in this unit J2 RS 232 This 9 pin D sub female connector is provided for RS 232 communications between the R1910 and a PC J3 SERVER Receives Handsets RF Transmits Base Stations RF connects to Server antenna J4 DONOR Receives Base Stations RF Transmits Handsets RF connects to Donor antenna Figure 2 7 1 R1910 I O Connections Figure 2 7 2 shows the connec...

Page 33: ...up unit LOCAL CONTROL This 9 pin D sub female connector is provided for RS 232 local communications between the R1920 and a PC MODEM This 3 pin circular connector is for POTS line interface to the R1920 REMOTE CONTROL This connector cables to the optional EX6 repeater expander unit SERVER Receives Handsets RF Transmits Base Stations RF connects to Server antenna DONOR Receives Base Stations RF Tra...

Page 34: ... should be used for repackaging with commercially available materials a Wrap unit in heavy paper or plastic b Use a strong shipping container A double wall carton made of 350 pound test material is adequate c Use a layer of shock absorbing material 70 to 100 mm 3 to 4 inch thick around all sides of the instrument to provide firm cushioning and prevent movement inside container Protect rear panel c...

Page 35: ...ragraphs provide a description of the control functions and operation of the R19X0 PCS Repeater 3 2 1 Power up Sequence For the R1910 to turn on the unit push the 1 side of the power switch rocker arm to the depressed position For the R1920 30 40 remove the access panel and push the power switch The unit will go through an initialization which includes restoring the unit to its last powered up sta...

Page 36: ...the factory The Help menu item contains a copyright notice and software version information Figure 3 1 Repeater Control Panel 3 2 2 1 Starting Control Software With the left mouse button double click the phone icon labeled WJ Repeater Control The application will launch and request which interface to use for communicating with the repeater Select the either one of two Com ports or the modem and pr...

Page 37: ...can be set to any allowable frequency channel in the band of the repeater by changing the channel number The channel can be changed by either clicking the Up Down arrow next to the channel or by placing the cursor in the channel number box and typing in a new channel number Don t forget to press the Enter key when typing in a channel number When the channel number is changed the forward and revers...

Page 38: ...erse Tracking is limited to 10dB 3 2 2 9 Received Signal Strength RSS The Donor RSS parameter is a graphical display of the received input signal strength in the downlink RF path 3 2 2 10 Oscillation Test The OSC Test button initiates the oscillation test function The purpose of the oscillation is to check the isolation between the donor and server antennas Ideally the test should only be performe...

Page 39: ...illation alarm and a General Power Amp alarm the repeater maintains operation as much as it is able When there is an oscillation alarm the unit will automatically lower the gain of the unit If the oscillation occurs even at the lowest gain setting then the unit will shut down However if an oscillation alarm or Power Amp alarm occurs the repeater automatically shuts down the RF chains and ceases to...

Page 40: ...displays the currently selected interface that the application is using to communicate with the repeater When using the serial RS 232 interface the application is able to detect the presence of a repeater When one is not detected the panel clears all the data fields disables all parameter input fields and displays a status message on the status bar of No Device When a repeater is connected to the ...

Page 41: ...Repeater Operation 3 7 Battery Voltage ...

Page 42: ...aph reference for detailed instruction and specifies the maximum time intervals between equipment cleaning inspection and performance checks __________ WARNING Whenever possible all preventive maintenance should be performed with the power cord disconnected from prime power source 4 3 EQUIPMENT REQUIRED No special tools or test equipment are required for performing routine preventive maintenance 4...

Page 43: ...rs A blown fuse can result from a variety of conditions including improper installation faulty power supply excessive output power levels AC power line transients etc WJ should be contacted if a repeater fuse needs frequent service The R1910 series repeater is equipped with a 250V 3A 5 x 20 mm Time Lag Fuse Buss GMC 3A or equivalent located at the power entry module Fig 4 1 To replace fuse first p...

Page 44: ...ng connectors should be checked for wear loose connections bad alignment or other possible causes of defective operation Worn parts should be replaced and loose connectors tightened Check for loose cable connections and tighten those connectors Remove the fuse and check for corrosion or damage replace when either occurs After a repair has been made alignment should be carried out if necessary and ...

Page 45: ...Repeater Scheduled Maintenance 4 1 Figure 4 1 ...

Page 46: ...Repeater Scheduled Maintenance 4 1 Figure 4 2 AC Circuit Breaker Press to reset AC Power Switch Off On 24V Fuse ...

Page 47: ...Repeater Drawings 5 1 Figure 5 1 ...

Page 48: ...Repeater Drawings 5 2 Figure 5 2 ...

Page 49: ...Repeater Drawings 5 3 Figure 5 3 ...

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