GPA-1 manual GE MDS GPA‐1 Manual P/N draft Rev A.
GPA-1 manual Table of Contents 1 Important Information ............................................................................................................ 3 1.1 RF Exposure ................................................................................................................... 3 1.2 FCC Approval Notice ...................................................................................................... 3 1.3 FCC Part 90 Information......................................................
GPA-1 manual 1 Important Information 1.1 RF Exposure 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 1.8 meters, (5.9 feet) to the antenna when the transmitter is operating with a unity gain antenna.
GPA-1 manual Caution; only use authorized antennas that meet the FCC license requirements. Use of unauthorized antennas, cables, and/or coupling devices not conforming with ERP/EIRP for outdoor/indoor will void the licensee’s license to operate. Introduction The GPA‐1 is an RF power amplifier designed for use in the 150‐174 MHz frequency range at up to 40 Watts. It is intended to serve as a 100% duty cycle amplifier for MDS SD1 operating in point‐to‐multipoint repeater or base applications. 1.
GPA-1 manual Figure 1 – J104 and R112 Locations 2 Interfaces 2.1 J101 Control Interface The J101 Control Interface is intended to connect to the transceiver’s control interface and provides keying and power control signals. Table 1 – J101 Control Cable Pin Functions Pin Pin 1 Pin 2 Pin 3 Pin 4 Function 3 Vdc enable TX, low=off 0.7 Vdc (varies to set RF power) Not used Ground 2.2 J102 RF Output J102 is a 50 Ohm Female Type N connector. 2.
GPA-1 manual 2.5 R112 Power Control Adjustment R112 is used to adjust the RF power output of the amplifier in internal and mode. Turn the potentiometer clockwise for higher power and counterclockwise for lower power. 3 Installation 3.1 Mounting the Unit The GPA‐1 is designed for mounting in a standard 19–inch rack cabinet using the 3U panel provided. Four screws (not provided) are required to attach the panel to the rack sides.
GPA-1 manual GPA‐1B smaller heat‐sink option GPA‐1 standard heat‐sink option
GPA-1 manual Unit Specifications Table 2 – Unit Specifications Parameter Operating Voltage Maximum Current Draw RF Drive Power RF Out Duty Cycle (GPA‐1 model) Duty Cycle (GPA‐1B model) Operating Frequency Mounting Approximate Weight Dimensions (GPA‐1 model) Dimensions (GPA‐1B‐model) FCC Identifier Name of Grantee Specification 10‐16 Vdc 8 Amperes @ 12.5V, 40W RF Out.
