Radio Frequency Systems BDA48660 SINGLE CHANNEL BI-DIRECTIONAL CDMA AMPLIFIER User Manual JD16049 0

Radio Frequency Systems Inc SINGLE CHANNEL BI-DIRECTIONAL CDMA AMPLIFIER JD16049 0

USER MANUAL

Part Number: J24004Drawing Control: JD16049 INSTRUCTION MANUALFOR48660 SINGLE CHANNEL CDMAPCS BI-DIRECTIONALAMPLIFIER2 Ryan Road, Marlboro, New Jersey 07746-1899Tel:1-908-462-1880 Fax: (908) 462-6919
Part Number: J24004Drawing Control: JD16049DisclaimerAll information and statements contained herein are accurate to the best of the knowledge of Celwave andRFS, but neither Celwave or RFS make any warranty with respect thereto, including without limitation anyresults which may be obtained from the products described herein or the infringement by such products of anyproprietary rights of any persons. Use or application of such information or statements is at the user’s solerisk, without any liability on the part of Celwave or RFS. Nothing herein shall be construed as license of orrecommendation for use which infringes upon any proprietary rights of any person. Product material andspecifications are subject to change without notice. All sales of the products described herein are subject toCelwave’s standard terms of sale and the specific terms of any particular sale.
iPart Number: J24004Drawing Control: JD16049TABLE OF CONTENTSPRODUCT OVERVIEW and GENERAL INFORMATION----------------------------------------------1PERFORMANCEBLOCK DIAGRAMFCC TYPE ACCEPTANCEOUTLINE DRAWING -------------------------------------------------------------------------------------------2GENERAL SPECIFICATIONS---------------------------------------------------------------------------------3OVERVALL THEORY OF OPERATION--------------------------------------------------------------------3DOWNLINKOUTPUT POWERCHANNEL AND ATTENUATION PROGRAMMINGPROGRAMMING GUIDE --------------------------------------------------------------------------------------5POWER CONTROL AND INTERMODULATION--------------------------------------------------------7REMOTE INTERFACE------------------------------------------------------------------------------------------7RF CONNECTIONS----------------------------------------------------------------------------------------------8AC/DC POWER ---------------------------------------------------------------------------------------------------8ENVIRONMENTAL CONSIDERATIONS ------------------------------------------------------------------9PERIODIC MAINTENANCE-----------------------------------------------------------------------------------9
iiPart Number: J24004Drawing Control: JD16049TABLE OF CONTENTS (Continued)SET UP AND INSTALLATION CONSIDERATIONS--------------------------------------------------10ANTENNA ISOLATION -------------------------------------------------------------------------------------- 10DIAGNOSTICS AND TROUBLESHOOTING ----------------------------------------------------------- 11Front Panel LEDsGain or Coverage ReductionExcessive Intermodulation or SpuriousORDERING AND RETURNING FOR REPAIR---------------------------------------------------------- 12WARRANTY ----------------------------------------------------------------------------------------------------12READ THIS MANUAL; WARRANTY DOES NOT COVER IMPROPER HANDLING!
1Part Number: J24004Drawing Control: JD16049PRODUCT OVERVIEW and GENERAL INFORMATIONThe 48660 Bi-directional Amplifier is a single channel CDMA PCS repeater. It is designed to amplify just oneCDMA channel while rejecting all others. The 48660 is tunable over the entire PCS band and providesapproximately 65 dB of gain to the selected channel. The unit is designed to enhance PCS coverage in buildings,basements, parking garages and other RF shielded environments. The unit is wall mountable and requires noperiodic maintenance.PERFORMANCEThis unit has a RF section that provides 65 dB of gain, down conversion and IF filtering. The IF filters use SAWtechnology for optimal selectivity. After upconversion, the output stage filtering attenuates LO leakage whileamplifying the selected channel to the set output power level. The standard product offers channel tuning locally bymeans of dipswitch or RS-232 connection. The control settings are for frequency selection and gain control to limitpower. Automatic power control assumes a wide input power dynamic range and intermodulation distortioncontrol.BLOCK DIAGRAMFigure X.1 System Block DiagramFCC COMPLIANCESYNTHESIZERUP LINK IF SECTIONDOWN LINK IFSECTIONDOWN LINK INPUTSECTIONUP LINK INPUTSECTIONUP LINK OUTPUTSECTIONDOWN LINK OUTPUTSECTIONDDAATTAA LLIINNEESS AANNDDCCOONNTTRROOLLDUPLEXERDUPLEXERFROM DONOR SITETO SERVICE AREADOWN LINK SIGNAL FLOWUUPPLLIINNKKSSIIGGNNAALLFFLLOOWW
2Part Number: J24004Drawing Control: JD16049FCC Compliance No: (Application in process.)
3Part Number: J24004Drawing Control: JD16049OUTLINE DRAWINGIntelli
4Part Number: J24004Drawing Control: JD16049GENERAL SPECIFICATIONSSpecifications may change without notice. All specifications stated as typical unless otherwise noted.Down Link (Base to Mobile) Up Link (Mobile to Base)Frequency 1930 to 1990 MHz 1850 to 1910 MHzTypical Pass Band at 3 dB downTypical Pass Band at 30 dB down ( +22 dB Gain)Gain at Min Attenuation -Typ. 65 dB 65 dBGain Range, Manual Attenuator 15 dB 15 dBPass Band Ripple - Typ.Noise Figure - Typ. 6.5 dB 6.5 dBOutput Power Set Point CDMA +23 dBm +23 dBmPower Control Range +20 dB +20 dB3rd Order Intercept Point, IP3 +44 dBm +44 dBmRecommended Input Power Maximum, Composite -35 to -80 dBm -35 to -80 dBmMaximum Input Power No Damage 0 dBm 0 dBmImpedance - Nom 50 OhmsVSWR, Input, Both Ports 2.0:1Propagation Delay < 5.0 microsecondPower 120 VAC @ 750 mAOperating Temperature -30 to +50o CConnectors, RF N FemaleDiagnostics Interface RS-232Programming DIP Switches & RS-232Size (WxHxD), in. (mm) 14.7 x 12.8 x 4.6 (374 x 325 x 117)Weight 19 lbsOVERALL THEORY OF OPERATIONThe 48660 is a single channel CDMA PCS Bi Directional Amplifier. It is comprised of two main components; UpLink and Down Link. With each component made up of 3 sections, Input Section, IF Section, and Output Section.Refer to Figure X.1. Since the Up Link and Down Link components are virtually identical, only the theory ofoperation for the Down Link will be presented.DOWN LINKSignals originating from the PCS base station are received at the antenna and fed to the input of the 48660. They arethen filtered through the first duplexer to attenuate any non-PCS signals which may be received at the antenna. Thesignal(s) is then fed to the input stage for amplification and additional filtering. If the signal as detected in the outputstage is too large, it will receive attenuation in the input section as well. At this point the signal is then fed into theIF section for down conversion, filtering through the SAW devices, additional amplification, and finally upconversion back to it’s original frequency. By using the same Local Oscillator for the down and up conversions,frequency accuracy is maintained. The newly up converted signal is then an exact replica of the original signal onlyvery highly filtered to get rid of any other signals near it. This signal is fed into the output section where additionalamplification takes place as well as Local Oscillator filtering. Special care has been taken in the design of the 48660Intelli BDA to maintain good spectral purity of the CDMA signal. It meets or exceeds the spectral regrowth criteriaof ANSI J-STD-008 at it’s rated output power.
5Part Number: J24004Drawing Control: JD16049OUTPUT POWERAfter all of the amplification and filtering is completed, a sample of the signal is measured and the output power ispredicted. This information is fed back to the Digital section and a Power Control voltage is generated and fed to theinput section attenuators to reduce the power if needed. This comprises the power control loop. Its response is slowcompared to the CDMA closed loop power control, so it will not interfere with the system.The output power of both RF links is set at the factory to be nominally +23 dBm. As the input signal increases to alevel which, when added to the gain produces an output power larger than the set point, the power control loop takesover to reduce the gain accordingly. This insures that under all input signal conditions below the maximum inputsignal level (-35 dBm), that the integrity of the CDMA spectrum be maintained.CHANNEL AND ATTENUATION PROGRAMMINGProgramming of the 48660 is accomplished either by DIP Switch Programming of the unit, or remotely via acomputer (See Remote Programming Manual TBD). This section addresses the DIP Switch Programming of theChannel and Attenuator Settings.The DIP Switches (S1) are on the Digital Board located just inside the shroud. They can be accessed by opening theshroud and with a pointed instrument such as a pencil or pen, can be set to certain values to set the frequency(Channel Number) and the Attenuation Settings for the Down Link and Up Link, see Figure XX. Care should betaken when closing the 48660 Intelli BDA shroud to disengage the latching mechanism located at the back of theshroud. Forcing the shroud closed will damage the shroud.Load ButtonDIP SwitchesFront PanelFigure X.X Location of DIP SwitchA7 MSBA0 LSB1100SW2S1Not Drawn to Scale
6Part Number: J24004Drawing Control: JD16049Upper MSBs Programming FunctionA7 A60 0 Channel Number0 1 Down Link Attenuation1 0 Up Link Attenuation1 1 Reserved for future useDEC NUM A5 A4 A3 A2 A1 A0 CH # FREQ DL(MHZ) FREQ UL(MHZ) BLOCK DL ATTN(dB) TYP UL ATTN(dB) TYP0 0 0 0 0 0 0 25 1931.25 1851.25 19.1 19.11 0 0 0 0 0 1 50 1932.50 1852.50 19.1 19.12 0 0 0 0 1 0 75 1933.75 1853.75 19.1 19.13 0 0 0 0 1 1 100 1935.00 1855.00 19.1 19.14 0 0 0 1 0 0 125 1936.25 1856.25 A19.1 19.15 0 0 0 1 0 1 150 1937.50 1857.50 19.1 19.16 0 0 0 1 1 0 175 1938.75 1858.75 19.1 19.17 0 0 0 1 1 1 200 1940.00 1860.00 19 198 0 0 1 0 0 0 225 1941.25 1861.25 18.9 18.99 0 0 1 0 0 1 250 1942.50 1862.50 18.9 18.910 0 0 1 0 1 0 275 1943.75 1863.75 18.9 18.911 0 0 1 0 1 1 325 1946.25 1866.25 18.8 18.812 0 0 1 1 0 0 350 1947.50 1867.50 D18.8 18.813 0 0 1 1 0 1 375 1948.75 1868.75 18.7 18.714 0 0 1 1 1 0 425 1951.25 1871.25 18.6 18.615 0 0 1 1 1 1 450 1952.50 1872.50 18.6 18.616 0 1 0 0 0 0 475 1953.75 1873.75 18.5 18.517 0 1 0 0 0 1 500 1955.00 1875.00 18.5 18.518 0 1 0 0 1 0 525 1956.25 1876.25 18.4 18.419 0 1 0 0 1 1 550 1957.50 1877.50 B18.3 18.320 0 1 0 1 0 0 575 1958.75 1878.75 18.2 18.221 0 1 0 1 0 1 600 1960.00 1880.00 18 1822 0 1 0 1 1 0 625 1961.25 1881.25 17.9 17.923 0 1 0 1 1 1 650 1962.50 1882.50 17.7 17.724 0 1 1 0 0 0 675 1963.75 1883.75 17.4 17.425 0 1 1 0 0 1 725 1966.25 1886.25 17.1 17.126 0 1 1 0 1 0 750 1967.50 1887.50 E16.6 16.627 0 1 1 0 1 1 775 1968.75 1888.75 16.1 16.128 0 1 1 1 0 0 825 1971.25 1891.25 15.5 15.529 0 1 1 1 0 1 850 1972.50 1892.50 F14.8 14.830 0 1 1 1 1 0 875 1973.75 1893.75 14 1431 0 1 1 1 1 1 925 1976.25 1896.25 13.31 13.332 1 0 0 0 0 0 950 1977.50 1897.50 12.5 12.533 1 0 0 0 0 1 975 1978.75 1898.75 11.7 11.734 1 0 0 0 1 0 1000 1980.00 1900.00 10.9 10.935 1 0 0 0 1 1 1025 1981.25 1901.25 10.2 10.236 1 0 0 1 0 0 1050 1982.50 1902.50 C9.5 9.537 1 0 0 1 0 1 1075 1983.75 1903.75 8.7 8.7
7Part Number: J24004Drawing Control: JD16049DEC NUM A5 A4 A3 A2 A1 A0 CH #NFREQ DL(MHZ) FREQ UL(MHZ) BLOCK DL ATTN(dB) TYP UL ATTN(dB) TYP38 1 0 0 1 1 0 1100 1985.00 1905.00 8.0 8.039 1 0 0 1 1 1 1125 1986.25 1906.25 7.2 7.240 1 0 1 0 0 0 1150 1987.50 1907.50 6.9 6.941 1 0 1 0 0 1 1175 1988.75 1908.75 5.7 5.742 1 0 1 0 1 0 25 1931.25 1851.25 DEFAULT 5.0 5.043 1 0 1 0 1 1 25 1931.25 1851.25 DEFAULT 4.4 4.444 1 0 1 1 0 0 25 1931.25 1851.25 DEFAULT 3.9 3.945 1 0 1 1 0 1 25 1931.25 1851.25 DEFAULT 3.4 3.446 1 0 1 1 1 0 25 1931.25 1851.25 DEFAULT 3.0 3.047 1 0 1 1 1 1 25 1931.25 1851.25 DEFAULT 2.7 2.748 1 1 0 0 0 0 25 1931.25 1851.25 DEFAULT 2.3 2.349 1 1 0 0 0 1 25 1931.25 1851.25 DEFAULT 2.0 2.050 1 1 0 0 1 0 25 1931.25 1851.25 DEFAULT 1.8 1.851 1 1 0 0 1 1 25 1931.25 1851.25 DEFAULT 1.6 1.652 1 1 0 1 0 0 25 1931.25 1851.25 DEFAULT 1.4 1.453 1 1 0 1 0 1 25 1931.25 1851.25 DEFAULT 1.2 1.254 1 1 0 1 1 0 25 1931.25 1851.25 DEFAULT 1.0 1.055 1 1 0 1 1 1 25 1931.25 1851.25 DEFAULT 0.8 0.856 1 1 1 0 0 0 25 1931.25 1851.25 DEFAULT 0.6 0.657 1 1 1 0 0 1 25 1931.25 1851.25 DEFAULT 0.5 0.558 1 1 1 0 1 0 25 1931.25 1851.25 DEFAULT 0.35 0.3559 1 1 1 0 1 1 25 1931.25 1851.25 DEFAULT 0.2 0.260 1 1 1 1 0 0 25 1931.25 1851.25 DEFAULT 0.1 0.161 1 1 1 1 0 1 25 1931.25 1851.25 DEFAULT 0.1 0.162 1 1 1 1 1 0 25 1931.25 1851.25 DEFAULT 0 063 1 1 1 1 1 1 25 1931.25 1851.25 DEFAULT 0 0Figure X.Y contProgramming is done by first selecting the mode (upper 2 digits, A6 & A7), then setting the desired value (lower 6digits) and pressing the load button (SW2). The 48660 will automatically set the desired value. See Tables X.X andX.Y for values.The frequency of the Down Link and Up Link are calculated as follows:FDL = 1930 MHz + 0.05 * NFUL = 1850 MHz + 0.05 * NWhere N is the Channel NumberAttenuation values are considered typical and need to be optimized once the 48660 is installed.The 48660 Intelli BDA will remember the last programmed channel number and attenuation values and will tune tothese values automatically upon subsequent power up initializations.
8Part Number: J24004Drawing Control: JD16049POWER CONTROL AND INTERMODULATIONPower control circuitry is provided to prevent excess output power and, thus, excess 3rd order intermodulationdistortion (IMD). IMD levels are a function of the output power and the IP3 of the amplifier stages [IM = 3(Po) -2(IP3)]. The FCC regulations specify the maximum IMD levels at -13 dBm. Each BDA is tested and set formaximum IMD levels of -13 dBm in either RF link. The resultant power setting is the "Usable Output Power" inthe general specifications. However, the typical IMD for PCS 1900 is below -30 dBm.The Power control circuitry senses output power. If the output power attempts to exceed the factory setting,generally due to strong input signals, the Power control circuitry introduces gain attenuation, maintaining outputpower to the preset limit [Pin + Gain - Attenuation = Pout]. When the input signal is too strong, the attenuationrange of the Power Control circuitry is exceeded; the output power will increase beyond the factory setting. In thissituation, it is likely that IMD levels will exceed -13 dBm. If this is expected to be a consistent problem, some inputattenuation should be provided.The yellow LEDs, "UL PWR and DL PWR", on the front panel will light up whenever the Power Control circuitryis active. The advantage of using Power control circuitry stage is two-fold. First, the dynamic range of theamplifier is increased. A wider range of input signal levels can be handled by the system. This advantage can alsobe stated in terms of gain. More gain can be put into the system to handle weak signals without risking prematurecompression and excessive intermodulation emissions due to stronger signals. The second significant advantage isthat intermodulation products are kept to acceptable levels. As more channels become active, or as some signalsbecome stronger, gain is reduced and total output power is kept constant.REMOTE INTERFACETYPE OF SERVICE:The intelliBDA is designed to be used on standard device telephone lines connected to the telephone line by meansof a standard jack called the USOC RJ-11C (or USOC FJ45S). Connection to telephone company provided coinservice (central office implemented systems) is prohibited. Connection to party lines service subject to state tariffs.TELEPHONE COMPANY PROCEDURES:The goal of the telephone company is to provide you with the best service it can. In order to do this; it mayoccasionally be necessary for them to make changes in their equipment, operations or procedures. These changesmight affect your service or the operation of your equipment, the telephone company will give you notice, in writing,to allow you to make any changes necessary to maintain uninterrupted service.In certain circumstances, it may be necessary for the telephone company to request information from you concerningthe equipment, which you have connected to your telephone line. Upon request of the telephone company, providethe FCC registration number and the ringer equivalence number (REN); both of these items are listed on theequipment label. The sum of all of the RENs on your telephone lines should be less than five in order to assureproper service from the telephone company. In some cases, a sum of five may not be usable on a given line.IF PROBLEM ARISE:If any of your telephone equipment is not operating properly, you should immediately remove it from your telephoneline, as it may cause harm to the telephone network. If the telephone company notes a problem, they may temporarily
9Part Number: J24004Drawing Control: JD16049discontinue service. When practical, they will notify you in advance of this disconnection. If advance notice is notfeasible, you will be notified as soon as possible. When you are notified, you will be given the opportunity to correctthe problem and be informed of your right to file a complaint with the FCC. Contact your telephone company if youhave any questions about your phone line. In the event repairs are ever needed on the intelliBDA, Celwave or anauthorized representative of Celwave should perform them. For information contact:Celwave-Corvallis4100 SW Research WayCorvallis Oregon 97333-1066.RF CONNECTIONSThe primary RF connections are made via two type "N" female connectors. The connector labeled "BASESTATION" must be connected to the antenna/system pointing towards the base station. The connector labeled"SERVICE AREA" must be connected to the antenna/system pointing into the service area.AC / DC POWERThe 48660 comes with a standard 6 ft. US type NEMA 5-15P 3-wire male plug with phase, neutral, and safetyground wires. AC power is only used to supply a high-efficiency 24 VDC switching power supply. This supply hasbeen thoroughly tested by Celwave for temperature capability, modulation effects, and harmonic coupling into theRF circuitry. All internal components are powered by 24 VDC.{Power supply listings: UL E100527 Vol. 6 (USA), CSA LR64950-40 (Canada), TUV R9472032 (Europe), VDENR84964 (Germany).} ****CHECK NEW LISTINGS!!!********The 48660 Intelli BDA is fused to prevent further damage should the BDA fail. The fuse located in the ACreceptacle housing. To replace, unplug power cord and with finger, apply slight downward pressure on the fuse doorwhile pulling out. The door will open and the fuse can then be replaced with a 3.15 Amp 5 x 20 mm type fuse orequivalent. Never replace with a higher amperage rated fuse! This may cause damage to the 48660 Intelli BDA andvoid warranty.WARNING: 120 VAC can be lethal. Never insert conductive objects into any opening.The 48660 Intelli BDA has a 3 pin DC connector on the front panel. This can be used to supply DC power between+20 V and +28 V for battery back up applications. If AC power is present, the 48660 will not draw any current fromthis connector. Once AC power is removed, the Intelli BDA senses if there is a voltage present at this port andbegins to draw current. If the voltage at this port ever drops below +20 Volts DC, the 48660 will turn itself off untilAC power is restored.The DC input is protected against short circuit, over voltage and reverse polarity conditions. It cannot be used tocharge batteries. This DC input is fused with the same fuse as used in the AC Power receptacle housing. To accessthe DC fuse, first remove AC and DC power from the Intelli BDA, open shroud and with a fuse puller or equivalenttool, remove fuse located in bottom right corner of the Digital Board (See Figure X.X). Replace with a 3.15 Amp 5x 20mm fuse or equivalent. Never replace with a higher amperage rated fuse!!! This may cause damage to the 48660Intelli BDA and void warranty.
10Part Number: J24004Drawing Control: JD16049Testing at Celwave has shown that two, 12 V batteries in series, rated at 7 AH will power the 48660 for greater than30 minutes.ENVIRONMENTAL CONSIDERATIONSOperating Temperature: -30o C to +50o C Operation over 60o C voids warranty. Operation at case temperatures over 50o C should be limited to 200 hours per year. Humidity: Non-condensing up to 95% relative for 0o C to 50o C within full specified data.PERIODIC MAINTENANCEThere is little maintenance in the 48660 Intelli BDA. As long as the unit is kept away from extreme temperatures,and moisture, it will provide long-term, carefree operation. Periodically, check the two type "N" RF connections forcorrosion, strain damage, and tightness. Periodically, check the AC or DC power connections for integrity.The 48660 Intelli BDA enclosure is intended for weather protected applications. Venting the enclosure increases thereliability but provides an entrance for moisture. It is also advisable to avoid a location with continuous high levelsof sunlight exposure and/or excessively dirty and dusty environments.Description Manufacturer Part Number NotesMating connector for DCConnector Switchcraft TA3F or TA3FLFuses--External AC andInternal DC Various Various 5 x 20mm 3.15 A Fast ActingTelco Interconnect Various RJ-11 Plug Std Tip & Ring Wired
11Part Number: J24004Drawing Control: JD16049SET UP AND INSTALLATION CONSIDERATIONSBEFORE APPLYING AC POWER:Make sure antennas are connected or the RF terminals are terminated!Make sure amplifier is vertically mounted!Antenna isolation must be 80 dB or greater to prevent oscillation!Check the incoming spectrum to assure that no signals in the pass band are greater then -15 dBm!ANTENNA ISOLATION Proper implementation of the antennas is absolutely crucial to the repeater system. Several important issues must beconsidered when selecting and implementing the antennas. The most important consideration, besides the obviousconcerns for gain and area of coverage, is the antenna isolation.Base station to service area antenna isolation should be 80 dB. If the isolation is less, then gain ripple due tofeedback is likely. Positive feedback sufficient for oscillation will overdrive one or both amplifier links and mayeventually cause damage to the BDA.High-gain (high directivity) antennas usually have significant isolation between front and back. Additionaldecoupling can be achieved by spatially separating the antennas. Generally, for in-building applications, with oneantenna located outside and the other antenna located inside, the isolation is adequate. An isolation measurement isalways recommended when possible.The most direct way to measure the isolation is to inject a known signal into one antenna, and measure the coupledsignal at the other antenna. This should be done across the applicable bandwidth to account for the frequencydependency of standing waves. Ordinarily, reciprocity would dictate that measuring the isolation between antenna 1and antenna 2 is the same as the isolation measured between antenna 2 and antenna 1. However, the reflection pathsfor each antenna are likely different; therefore, the isolation measurements should be repeated in each link.
12Part Number: J24004Drawing Control: JD16049DIAGNOSTICS and TROUBLESHOOTING GUIDEOPENING THE AMPLIFIER ELECTRONICS COMPARTMENT WILL NEGATEWARRANTY.The diagnostics of the 48660 Intelli BDA can assist in troubleshooting an installation problem or determining if theBDA needs to be sent in for repair. In some situations, the shroud of the 48660 Intelli BDA may need to be openedto allow access to the Programming DIP Switches and/or DC Power fuse. Under no circumstances should theinternal amplifier electronics subassembly be opened!Front Panel LEDs:There are 6 LED indicators on the front panel to indicate certain faults or modes of operation. Table X.2 describesthese functions:LED Name FunctionPower Steady ON indicates AC power is present. Blinking ON/OFF indicates unit is powered fromDC ConnectionFault Normal OFF. ON indicates fault condition (TBD)Synth Lock Steady ON indicates synthesizer is in locked condition. Will blink momentarily whenchanging channels. OFF indicates synthesizer is not locked and a fault condition existsModem ON indicates modem activityUL Power ON indicates Up Link Power Control Loop is active ie.) Attenuation is being applied tosignal. During installation, the UL Attenuator should be adjusted to keep this LED OFFduring normal operationDL Power ON indicates Down Link Power Control Loop is active ie.) Attenuation is being applied tosignal. During installation, the DL Attenuator should be adjusted to keep this LED OFFduring normal operationTable X.2 LED DescriptionGain or Coverage Reduction:Reduced gain may indicate a device failure. The RED Fault LED will be lit. See FAULT MONITORING. If theBDA gain is low and neither the Red Fault nor Yellow DL or UL PWR LEDs are lit then the unit may have faultyinternal connections or filter detuning. Return unit for repair.The most likely cause of system gain reduction is corruption of connections or cabling somewhere in the RF path.Check all cabling for integrity. Another possible cause of gain reduction is a movement of the antenna, or asignificant change in the surroundings leading to loss of RF signal.Excessive Intermodulation or Spurious:Because the Intelli-BDA is single channel, excessively strong out of band signals are attenuated out early in theamplifier chains. Excessive intermodulation products are usually contributed by the in band signal being too strong.To reduce this, simply adjust the attenuator setting for that particular link until the LED indicating the power for thatlink is extinguished.
13Part Number: J24004Drawing Control: JD16049Another possible source of a large spurious signal is amplifier oscillation. The amplifiers will only oscillate if theantenna isolation is insufficient. It is also possible that "dirty" connections could be causing excessive noise output.This would be particularly evident while wiggling cables and connectors.ORDERING & RETURNING FOR REPAIRContact Celwave Order Entry at 1-800-321-4700 for a customer service request number (CSR). Be prepared toprovide the model number, serial number of the BDA as well as a description of the symptoms of the problem.Typical turn around time for repairs is two weeks. Warranty repairs will be given the highest priority.Send unit, freight-paid with the Return Celwave CorvallisAuthorization Number on the outside of the package to: 4100 SW Research Way Corvallis Oregon 97333-1066LIMITED WARRANTYThe Seller warrants that, at the time of shipment, the products manufactured by the Seller are free from defects inmaterial and workmanship. The Seller's obligation under this warranty is limited to replacement or repair of suchproducts within one year from date of shipment. No material is accepted for replacement or repair without writtenauthority of the Seller. Replacement or repair is made only after an examination at the Seller's plant shows defectivematerial or workmanship at the time of manufacture. The Buyer must prepay all shipping charges on the returnedmaterial. The Seller is in no event liable for consequential damages, installation costs or other costs of any nature asa result of the use of the products manufactured by the Seller, whether used in accordance with instructions or not.The Seller is not liable for replacement of any product damaged by lightning.THIS WARRANTY IS IN LIEU OF ALL OTHERS, EITHER EXPRESSED OR IMPLIED. No representative isauthorized to assume for the Seller any other liability in connection with the Seller's products.
Part Number: J24004Drawing Control: JD160492 Ryan Road, Marlboro, New Jersey 07746-1899Tel:1-908-462-1880 Fax: (908) 462-6919

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