Andrew Base Station Subsystems Group 100576HEPA High Efficiency Power Amplifier HePA1900V3 User Manual HePA1900 V3 Users Manual 1 1

Andrew Corporation, Base Station Subsystems Group High Efficiency Power Amplifier HePA1900V3 HePA1900 V3 Users Manual 1 1

User Manual

RF Power Amplifiers Andrew Corporation – Power Amplifier Group Propriety – Use pursuant to Company Instruction 1 of 5 High Efficiency Power Amplifier Model: HePA1900 V3 Operation Instruction Date: May 14, 2008 Version. 1.1 Ref# : FCC ID:S8L-100576HePA & IC:2237-100576HePA
RF Power Amplifiers Andrew Corporation – Power Amplifier Group Propriety – Use pursuant to Company Instruction 2 of 5 Introduction This document presents description of the Andrew Corporation 1900 Band HePA (High Efficiency Power Amplifier) amplifiers. The HePA1900V3 amplifier is a high power, RF amplifier intended to provide signal amplification and conditioning. The HePA1900V3 amplifier is compatible with GSM and EDGE air interfaces operating in U.S. domestic cell sites where FCC compliance is mandatory. The Cell band (1930 MHz to 1990 MHz) HePA1900V3 RF power amplifier is capable of amplifying a single carrier of different modulation types to a composite power level of 60Watts. HePA1900 Specifications The HePA1900 provide linear amplification of single-carrier signals in the cellular frequency band. The 1900 Band HePA, have the following specifications: Parameter Specification Operating RF Band 1930-1990MHz In band RF gain 48dB Input signal types GSM or EDGE single carrier Input DC Power -48 VDC, nominal DC voltage input range -38VDC to -58.5VDC Rated Output Power @ -38VDC to -58.5VDC input 60W average/GSM & 45W average/EDGE DC-RF Efficiency 28%, rated output power, nominal input voltage Physical dimensions 10” x 14” x 3” Weight < 15lbs Cooling technique External cooling when the Amplifier is placed in the customer frame. Temperature Range 0°C to +60°C meeting specifications. Table 1 HePA1900V3 Specifications Functional Blocks: The Andrew HePA is comprised of the following functional areas: − Preamplifier with unit gain control This block gives to the unit its specified gain through 3 amplifier stages and helps keeping this gain constant over temperature through a variable attenuator, this one being controlled by the controller circuit. − Amplifier power Final stage This stage brings the signal to its desired high power level, it is the heart of the RF section of the unit. The unit power, linearity and efficiency directly come from this block.
RF Power Amplifiers Andrew Corporation – Power Amplifier Group Propriety – Use pursuant to Company Instruction 4 of 5 Inputs and Outputs: The amplifier is powered from a DC supply voltage, which can range from -38VDC to -58.5VDC. The DC power is brought into the amplifier through a D-Sub connector located on the face plate of the amplifier. A second multipoint connector located on the amplifier face plate is used for serial communication, monitoring and control. This connector is used both during factory tests and at the system level by the customer . Alarms and operating state are communicated to the outside world through the serial communications bus and through the face plate LED. The RF signal is brought into the amplifier through a female SMA type connector located on the face plate of the amplifier. The amplifier RF signal is brought out of the amplifier through a N type connector located on the face plate of the amplifier. Control System: A microprocessor controller is used to control the amplifier alarm system, control environmental compensation of the amplifier. Figure HePA1900 Face plate view Alarm LED RF output N connector DC Power Connector 3W3 D-Sub Captive Screw Mounting Monitoring& control Multipoint connector RF input SMA connector
RF Power Amplifiers Andrew Corporation – Power Amplifier Group Propriety – Use pursuant to Company Instruction 5 of 5 Figure 1 HePA1900 side view The alarms are mapped to front panel LED behavior, as indicated: - LED red =major alarm/reset/disable : the PA is not operational - LED green = the PA is operational = synch present, no alarm, PA ready to amplify The amplifier monitoring and control is also managed through a serial link and a customer specific protocol. Installation and Operation Set-Up The HePA1900V3 is easy to operate and use, only requiring a special cables for DC power and serial bus control connection into the customer frame. RF input and output connections are done with industry standard SMA and N connectors. FCC Statements: FCC ID TBD This devise complies with Part 2, 15 & 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. Heatsink fins Captive Screw Mounting

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