Andrew Base Station Subsystems Group 100951MCPA Multiple Carrier Power Amplifier MCPA850 RF100951 User Manual Op Instructions Rev
Andrew Corporation, Base Station Subsystems Group Multiple Carrier Power Amplifier MCPA850 RF100951 Op Instructions Rev
Manual
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| Document ID | 945806 |
| Application ID | 5Tv8i/GmOyd32tbxbbj+9w== |
| Document Description | Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 35.53kB (444114 bits) |
| Date Submitted | 2008-05-23 00:00:00 |
| Date Available | 2008-05-23 00:00:00 |
| Creation Date | 2008-05-01 00:38:09 |
| Producing Software | Acrobat Distiller 5.0 (Windows) |
| Document Lastmod | 2008-05-01 00:38:09 |
| Document Title | Microsoft Word - Op Instructions-Rev.doc |
| Document Creator | PScript5.dll Version 5.2.2 |
| Document Author: | Wei |
Multiple Carrier Power Amplifiers Model: MCPA850 & MCPA1900 Operation Instruction Date: April 16, 2008 Version. 2.0 RE: FCC ID S8L-100951MCPA IC:2237F-100951MCPA, RE: FCC ID S8L-100963MCPA IC:2237F-100963MCPA Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 1 of 1 Introduction This document presents description of the Andrew Corporation 850/1900 Band MCPA (Multi-Carrier Power Amplifier) amplifiers. The MCPA amplifier is a high power, mixed-mode RF amplifier intended to provide signal amplification and conditioning. The MCPA amplifier is compatible with GSM/EDGE and WCDMA air interfaces operating in U.S. domestic cell sites where FCC compliance is mandatory. The Cell band (869 MHz to 894 MHz) MCPA and PCS band (1.93 GHz to 1.99 GHz) RF power amplifier capable of amplifying multiple signals of different modulation types to a composite power level of 160 Watts. MCPA Specifications The MCPA1900and MCPA850 provide linear amplification of multi-carrier, mixedmode signals in the cellular and PCS frequency bands, respectively. The 850 Band and 1900 Band MCPA, have the following specifications: Parameter Specification Operating RF Band 869-894MHz for 800 Band units 1930-1990MHz for 1900 Band Instantaneous BW 25MHz for all 800 Band > 45MHz for all 1900 Band Rated Output Power @ ≥ +23.5 to 30 VDC input 160W average for -160 units (Typical: 40W per Carrier for CDMA /WCDMA and 25W per Carrier for GSM/EDGE/TDMA) Rated Output Power @ ≥ +21.0 to < +23.5 VDC 105W average Input signal types TDMA, GSM/EDGE, WCDMA, CDMA/EVDO DC power Nominal input voltage is +27VDC DC voltage input range +21VDC to +30VDC normal DC-RF Efficiency 18% typical for 160w versions Physical dimensions 18.5” x 17.25” x 3.75” Weight 35 pounds, typical Integral Fans Front-mounted, full fan tray may be replaced without PA module removal from sub rack and without disrupting service. Cooling technique Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 2 of 2 Parameter Temperature Range Specification -40°C to +50°C operational, specifications. -20°C to +50°C meeting Table 1 MCPA Specifications The cell amplifier has been designed to support an instantaneous bandwidth of 25 MHz. Multiple carriers may be placed within a continuous 25 MHz span and the product shall meet specified performance marks. The PCS amplifier has been designed to support an instantaneous bandwidth of 45 MHz. Multiple carriers may be placed within a continuous 45 MHz span in the PCS band and the product shall meet specified performance marks. Each amplifier has a nominal gain of 56 dB and is phase matched at room temperatures. The MCPA is designed to track amplitude and phase over all environmental conditions such that the units may be used in a parallel configuration Functional Blocks: The Andrew MCPA is comprised of the following functional areas: − − − − − − − − Preamplifier with unit gain and phase control Feed-Forward amplifier circuit Main amplifier stage Pre-distortion circuit FICA (Filter, Isolator, Combiner Assembly) Power conversion and conditioning circuit Controller circuit Communications circuit Inputs and Outputs: The amplifier is powered from a DC supply voltage, which can range from 21V to 30V. The DC power is brought into the amplifier through a D-Sub connector located on the rear side of the amplifier. The D-Sub connector also contains an RS-485 communications bus. A second D-Sub connector located on the amplifier front panel is used for RS-232 communication. This connector is only used during factory tests and field maintenance procedures. Alarms and operating state are communicated to the outside world through the RS-485 communications bus, the RS-232 communications bus, and visible LEDs located on the amplifier front panel. Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 3 of 3 The RF signal is brought into the amplifier through a female PkZ type connector located on the rear of the amplifier. The amplifier RF signal is brought out of the amplifier through a N type connector located on the rear of the amplifier. Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 4 of 4 Control System: A microprocessor controller is used to control the amplifier alarm system, control environmental compensation of the amplifier, and to maintain a linearization solution for the pre-distortion circuit and the feed-forward circuit. Alarm LED Fan Tray Assembly Warning LED Captive Screw Mounting Active LED Handles Tx Enable Disable Switch RS232 Debug Port Fan Tray Interface Figure 1 MSA1900-135 MCPA Front Panel DC/Control/RF input Connector 24W7 Combo D-Sub RF Output Connector Type N Figure 2 MSA1900-135 Rear Panel Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 5 of 5 Alarm LED Fan Tray Assembly Warning LED Captive Screw Mounting Active LED Handles Tx Enable Disable Switch RS232 Debug Port Fan Tray Interface Figure 3 MSA850-135 MCPA Front Panel DC/Control/RF Input Connector 24W7 Combo D-Sub RF Output Connector Type N Figure 4 MSA850-135 Rear Panel The following table is a summary of detailed alarms within the PA Module. The alarms are mapped to front panel LED behavior, as indicated. Additionally, the alarms are mapped to the discrete line relays and available at the D-Sub connector at the rear of the PA Module. Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 6 of 6 Condition (Shading shows grouping) Initial Power On, no alarms Self Test fail Normal Operation – RF enabled Normal Operation – RF disabled Fans (see note 1) High temp, Minor High temp, Critical (see note 2) RF overdrive Major (see note 3) RF Overdrive Critical (see note 4) Linearizer (see note 5) Device health and Internal Voltages Sensor fault (see note 6) Device current (see note 7) VSWR minor (see note 8) VSWR critical (see note 9) Low input voltage (<26V) Bias fault (factory only) (see note 10) Self-test fail (see note 11) Configuration fault (EEPROM checksum) Alarm Type (Minor Alarms are shown by Green and Yellow at the same time) Green LED Yellow LED Normal Major Comments Retry On for ½ - 1½ secs On On Red LED Critical On Critical On On Fast Flash 1 Hz complete cycle Minor Minor On On On On No action Auto-recover Critical On Shut down Major On Gain reduced, Auto-recover Critical On Shut down Critical -- On Shut down Critical On Shut down Critical On Shut down Critical On Shut down Minor On On No action. 4 sec delay to turn on the LEDs Critical On Shut down Major On Gain reduced, Auto-recover Critical On Shut down Critical On Shut down Critical On Shut down Table 2 Alarm mapping for PA Module Note 1: Fan failure is considered a minor alarm since there is no immediate impact on unit operation, the seriousness depends on ambient temperature, and the high temperature critical alarm will eventually protect the unit from damage. Note 2: High temp: will retry when the temperature drops by a hysteresis amount, if there is no fan alarm. Note 3: Whenever the overdrive protection mechanism (see above) requires added attenuation for a sustained period equal to the alarm hysteresis time, an overdrive major alarm is declared. This condition indicates that firmware has reduced amplifier gain, but the amplifier output is not being overdriven. This threshold is typically 0.5 dB above rated output power. Note 4: This alarm indicates that the input level is of a value which cannot be attenuated enough by the input attenuator. Shut down must happen fairly quickly (20-100 mS tentative) to avoid tripping the circuit breakers and to avoid RF device failure. This Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 7 of 7 threshold is typically 10.5 dB above rated input power (51.3 dBm output – 56 dB nominal gain). Note 5: Whenever a linearizer alarm occurs, the amplifier is shut down. Each actively tuned gain and phase adjuster has a factory nominal setting with leash limits around it. Whenever the tuning algorithm persistently requires an adjustment beyond the leash limits, a linearizer alarm is declared. Note 6: Some sensors allow fault detection because they give readings that are out of range (e.g. temperature sensor). Note 7: Under current or over current depending on the hardware. Note 8: Typically 10 dB to set the alarm, with 3 dB of hysteresis (alarm resets at -13 dB). When operated with other amplifiers in parallel, each amplifier performs its own VSWR diagnostics and shut down independently. The shutdown process is coordinated with the RFIM and Switch Combiner Module, eliminating chain reaction scenarios. Note 9: A VSWR critical alarm is declared when the reflected power is 80W or more and indicates that the unit may be damaged if not shut down. Since the amplifier cannot detect that this condition has cleared while shut down, an RF enable command, restart command, or power cycle is required to clear this condition. Since there are circulators on the amplifier, a delay of about 1 second is acceptable before shutting down. Note 10: A bias fault is declared during the factory bias setting algorithm (see above) if firmware is unable to set the bias correctly. This is typically a hard failure; however, the bias setting command can be repeated. Note 11: Self test: Whenever the amplifier is powered on or reset (whether from the front panel or otherwise), firmware performs a self-test. Included in the test are processor RAM, boot image checksum, NVM image checksum, temperature sensors, power supplies, and pilot/receiver operation. If any one of these tests fails, a self-test failure critical alarm is declared and the unit does not start up. There is no recovery short of a reset or power cycle. This is typically a hard failure; however, self-test will be repeated on the next restart command or power cycle. Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 8 of 8 Installation and Operation Set-Up The MCPA is easy to operate and use, requiring no special cabling since the main in/put/output and +27V DC @ 30A, power connections are all blind mated into a backplane. The input signals are also distributed to the amplifiers via the sub rack wiring from a front RF connector. FCC Statements: FCC ID: S8L-100951MCPA & FCC ID S8L-100963MCPA This devise complies with Part 2, 15,22& 24 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. Warning Changes of modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipments. RF exposure compliance is addressed at the time of licensing, as required by the responsible FCC Bureau(s), including antenna co-location requirements of 1.1307(b)(3). Industry Canada Statements: IC:2237F-100963MCPA & IC:2237F-100951MCPA 1. Quality Norms : The testing of the equipment is carried out as the norms laid in IC standards. 2. Labeling : MCPA 1900 & MCPA850 when sold in Canada will have: (a) The certification number, prefixed by the term "IC: ", i.e. IC:2237F-100963MCPA or IC: 2237F-951MCPA (b) The manufacturer's name, trade name or brand name, i.e. Andrew Corporation (c) A model name or number. Model Name = MCPA1900 or MCPA850 Model Number: RF100963 or RF100951 (d) This device complies with RSS-131, RSS-102 of the IC Rules. Andrew Wireless Solutions Propriety – Use pursuant to Company Instruction 9 of 9
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