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Front cover
User’s Manual
PA 300
Peaking Amplifier
68-1108-01 B
12 08
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Precautions Safety Precautions Safety Instructions • English Warning Power sources • This equipment should be operated only from the power source This symbol is intended to alert the user of important indicated on the product. This equipment is intended to be used with a main power operating and maintenance (servicing) instructions in system with a grounded (neutral) conductor. The third (grounding) pin is a safety the literature provided with the equipment. feature, do not attempt to bypa
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• • • • • • • • • • • FCC Class A Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to 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 undesired operation. The Class A limits are designed to provide reasonable protection
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Table of Contents Chapter One • Introduction ................................................... 1-1 About this Manual .................................................................... 1-2 About the PA 300 ....................................................................... 1-2 Features ........................................................................................ 1-2 Chapter Two • Installation and Operation ................. 2-1 Installation Overview ........................
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Table of Contents, cont’d All trademarks mentioned in this manual are the properties of their respective owners. 68-1108-01 B 12 08 ii PA 300 Peaking Amplifier • Table of Contents
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PA 300 Chapter One 1 Introduction About this Manual About the PA 300 Features
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Introduction About this Manual This manual contains information about the Extron PA 300 peaking amplifier, and includes information on how to install, operate and troubleshoot the unit. About the PA 300 The PA 300 is an ultra high performance RGB peaking amplifier capable of driving a 1600 x 1200 resolution computer signal over 600 feet (185 m) using Extron Mini HR cables, or 1000 feet (300 m) using Extron RG6 cable. The PA 300 is compatible with both RGB and HDTV component signals. The P
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PA 300 Chapter Two 2 Installation and Operation Installation Overview Mounting the PA 300 Front Panel Features Rear Panel Features Cabling
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Installation and Operation Installation Overview 1 Be certain the source device, the PA 300, and the output device are turned off and disconnected from the power source. 2 If desired, mount the PA 300 in a rack or furniture. See "Mounting the PA 300", below. 3 Cable the inputs and outputs to the PA 300. See "Cabling" on page 2-8. 4 Plug the input device, the PA 300, and the output device into a grounded AC source. 5 Turn on the input and output devices. Mounting the PA 300 The PA 3
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Tabletop use Four self-adhesive rubber feet are included with the PA 300. For tabletop use, affix one foot at each corner of the bottom side of the unit and place the unit in the desired location. Rack mounting For optional rack mounting, do not install the rubber feet. Mount the PA 300 on a 6" deep, 1U high rack shelf (part #60-190-10 or 60-604-10) or a 9.5" deep 1U high rack shelf (part #60-190-01 or 60-604-01). 1. Remove the rubber feet if they were previously installed on the bottom
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Installation and Operation, cont’d 1U Universal Rack Shelf 1/2 Rack Width Front False Faceplate Front false faceplate uses 2 screws. (2) 4-40 x 3/16" Screws N Using screws longer than 3/16” will damage Use 2 mounting holes on the unit and void the opposite corners. warranty. Mounting the PA 300 on a 9.5" deep rack shelf Under-desk mounting Furniture-mount (under a desk or shelf) the PA 300 using the optional mounting kit (part #70-077-01), as illustrated below. Under-desk mounting the PA 30
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1. Remove two screws from one side of the unit. Retain the screws for possible future use. 2. Attach one bracket to the side of the unit, using the provided machine screws. 3. Repeat steps 1 and 2 on the other side of the unit. 4. Hold the PA 300 with the attached brackets against the mounting location. On the mounting surface, mark the location of the four bracket screw holes. 5. Drill pilot holes 1/4" (6.4 mm) deep and 3/32" (2.4 mm) in diameter in the desk or table at the locations o
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Installation and Operation, cont’d Through-desk mounting Mount the PA 300 through a desk or table, using the optional mounting kit (part #70-077-02), as illustrated below. Through-desk mounting the PA 300 1. Install the brackets as shown above. Tighten the screws only enough to allow sliding of the brackets. 2. Mark the opening through which the unit will be mounted — approximately 1.8" by 8.9" (4.6 cm by 22.6 cm). 3. Cut out the material from the installation area. 4. Hold the unit, with t
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Front Panel Features GAIN PEAKING LF HF PA 300 PEAKING AMPLIFIER 1 2 3 Power LED — Lights when the PA 300 is receiving power. a Gain control potentiometer — Adjusts the amount of b compensation for amplitude losses caused by cable resistance. Peaking control potentiometers — provide optimum signal c compensation. Separate high and low frequency controls. LF — Provides adjustment to minimize image streaking. HF — Provides adjustment for achieving the best image detail. Rear Panel Feature
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Installation and Operation, cont’d Cabling The PA 300 is specifically designed for long cable run applications. For best results, install the amplifier close to the signal source to drive a long cable to the display. The inputs of the PA 300 are BNC connectors. If the signal source uses a 15-pin HD connector, use an Extron SYM BNCM cable (Extron part #26-533-xx) to make the connection. See the illustration below. RGBHV RGBHV R G B H/V V RGBS B H/V R G V RGsB, RsGsBs, Component R G B H/V
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PA 300 Chapter Three 3 Adjusting the Display Signal Compatibility Potentiometer Adjustments
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Adjusting the Display Signal Compatibility The PA 300 processes VGA-UXGA, RGBHV, RGBS, RGBsB, RsGsBs, HDTV, and component video signals. Potentiometer Adjustments The PA 300 achieves superior amplification by using two independent peaking potentiometers: LF for streaking adjustment and HF for detail adjustment. The goal in adjusting the PA 300 Gain and Peaking potentiometers is to produce a sharp image (i.e., an image free of streaking or smearing) on the attached display. An oscillosc
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Adjusting the peaking To adjust the Peaking potentiometers, do the following: 1. Using MS Paint and a spreadsheet, create a testing image on your PC desktop that includes squares, lines, text, and gradations of color. Use the illustration below as a guide. 2. Adjust the LF (low frequency) potentiometer until the image is free of streaking. When the LF is over adjusted, the streaking is the same color as the image, as shown below. PA 300 Peaking Amplifier • Adjusting the D
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Adjusting the Display, cont’d When the LF is under adjusted, the streaking is the inverse color of the image, as shown below. The potentiometer should be adjusted midway between these two extremes. 3. Adjust the HF potentiometer until both text and icon images appear sharp. When HF is over adjusted, ghosting may appear, as illustrated below. When the HF is under adjusted, smearing may appear, as shown below. The potentiometer should be adjusted midway between these two extremes
