GE MDS DS-ENETL2TU ENET-L2TU 40 watt amplifier User Manual 4218A eNETL2W PA

GE MDS LLC ENET-L2TU 40 watt amplifier 4218A eNETL2W PA

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Manual

05-xxxxA01, Rev. A eNETL2T/U 40-Watt Power Amplifier Page 1 of 2 INTRODUCTION The eNETL2T is a 40-watt RF power amplifier designed for usein the 220–222 MHz frequency range. It is intended to serve asa 100% duty cycle amplifier for MDS entraNET 220 radiomodules (ROR220) operating in point-to-multipoint repeaterapplications. The amplifier is designed to comply with FCC Part90 and FCC Part 15 requirements. The eNETL2U is a similarmodel designed as an intermittent duty amplifier for the samepurpose. Figure 1. MDS eNETL2 Series RF Power Amplifier (T-model shown, cover removed to show internal layout) Product Description The eNETL2T/U power amplifier consists of a RF amplifier andPCB mounted to a heat sink, with a DC Power interface, powercontrol interface, and input/output RF connections on thesidewalls of the chassis. DC power is supplied to the amplifierfrom a regulated and filtered DC source capable of supplying10-16 Vdc at a maximum current of 6 Amperes. The DC powersource should be current limited or have a protective fuse orcircuit breaker. INSTALLATION Mounting the Unit The amplifier is designed for mounting in a standard 19 -inch rack cabinet using the 3U panel provided. Four screws (not pro-vided) are required to attach the panel to the rack sides. This panel also serves as a heat sink for the PA module, and is nor-mally mounted with the cooling fins facing outward. External Connections To place the amplifier module in service, make the following ca-ble connections:1. Using low loss 50-ohm coaxial cable, connect the RF Input connector (J103) to the RF output connector of the MDS entraNET 220 radio module (ROR220).2. Using low loss 50-ohm coaxial cable, connect the RF Output connector (J102) to the station duplexer.3. Connect the Power Control interface (J101) to the MDS entraNET 220 radio module (ROR220) in accordance with the pin connections listed below. J101 is an 8-pin Molex polarized connector.Pin 1—3 Vdc enable TX, low=offPin 2—0.7 Vdc (varies to set RF power)Pin 3—Not usedPin 4—Ground4. Connect 10-16 Vdc power supply to the Power connector (J100). The left pin is positive (+); the right is negative(–). RF Power Output Check/Adjustment To check/set the amplifier’s RF power output level, proceed asfollows:1. Connect a wattmeter (rated for use at 220 MHz, and at least 40 watts) to the amplifier’s RF output connector (J102). Terminate the wattmeter into a 50-ohm, non-inductive load.2. Apply RF drive from the MDS entraNET 220 radio module (ROR220) and note the RF power indication at J102.3. If necessary, adjust R115 (see Figure 1) with an insulated flat blade tool to achieve the desired output level. Access to R115 is available through a top cover vent slot. UNIT SPECIFICATIONS Operating Voltage: 10-16 VdcMaximum Current Draw: 6 AmperesRF Drive Power: 100 mWRF Out: +40 to +46 dBm (10-40 watts), adjustableOperating Frequency: 220-220 MHzMounting: standard 19-inch rack cabinetApproximate Weight: 5.15 lbs.Dimensions (T-model): 5.25” H x 19” W x 2.88” D(13.34 H x 48.26 W x 7.31 D cm)Dimensions (U-model): 5.25” H x 7” W x 2.88” D(13.34 H x 17.78 W x 7.31 D cm) TECHNICAL ASSISTANCE Technical assistance for MDS products is available by usingone of these methods to contact us: Telephone: 585.241.5510 FAX: 585.242.8369 E-mail: techsupport@GEmds.com Web: www.GEmds.comInstruction SheetMDS eNETL2T/U 40-Watt RF AmplifierMicrowave Data Systems Inc., 175 Science Parkway, Rochester, NY 14620 USATel. 585.242-9600 FAX 585.242-9620 www.microwavedata.com
Page 2 of 2 eNETL2T/U 40-Watt Power Amplifier 05-xxxxA01, Rev. A Professional installation required. The radio equipment described in this guide emits radio frequency energy. Although the power level is low, the concentrated energy from a directional antenna may pose a health hazard. Do not allow people to come closer than 2.07 meters (6.79 feet) to the antenna when the transmitter is operating in indoor or outdoor environments. More information on RF exposure can be found on the Internet at: www.fcc.gov/oet/info/documents/bulletins.RF Exposure FCC Part 15 Notice This unit complies with Part 15 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 undes-ired operation. This device is specifically designed to be used under Section 15.247 of the FCC Rules and Regulations. Any unauthorized modification or changes to this device without the express approval of GE MDS may void the users authority to operate this device. Furthermore, the unit is intended to be used only when installed in accordance with the instructions outlined in this document. Failure to comply with these instructions may also void the users authority to operate this device. Industry Canada RSS Notice Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

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