USER MANUAL 5760 Series 25/50/100 Watt Digital Amplifier AXCERA, LLC 103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA (724) 873-8100 • FAX (724) 873-8105 www.axcera.com • info@axcera.
The 5760 has no front panel adjustments, however there are several adjustments and test points on the Power Detector/Control board. The board is mounted in the upper right corner with abbreviations engraved on the mounting plate.
J1 J2 J3 J4 A.C. Input RF Input Remote/control RF Output J3 Pinouts are: 3 4 6 8 9 10 15 16 18 19 20 Ground Remote Forward Power Remote Reflected Power Operate Command Output Amplifier Interlock Amplifier Interlock Return AGC Outer Loop Remote Overtemp.
Internal LED Indicators 5760 Enable DC OK Bias MOD OK RF O/P green green green green green
765 DIGITAL AMPLIFIER TABLE OF CONTENTS I. INTRODUCTION: II. SYSTEM 5765: ................................................................................1586-1003 A. SYSTEM DESCRIPTION B. SPECIFICATIONS III. AMPLIFIER: A. DRAWINGS: 2. INTERCONNECT .........................................................1586-8003 B. AMPLIFIER SUBASSEMBLIES VI. MAINTENANCE: A. This section contains information on troubleshooting, problem analysis and repair procedures for the 5765.
5765 25 WATT DIGITAL AMPLIFIER SYSTEM DESCRIPTION The 5765 is a digital amplifier capable of operating at a nominal output power of 50 watts average. The 5765 is comprised of a 25W Power Amplifier Subassembly, a Power Factor Corrected (PFC) Front End Module, Peak Detector/Control Board, and a directional coupler. Combining the latest in GaAs FET amplifier technology and Feed Forward distortion cancellation, the 5765 delivers an output power of 25 watts (average).
SPECIFICATIONS Technical Specifications Type of Emissions ....................................................................6M00D7W Frequency Range ..... 2150 to 2162 and 2500 to 2686 MHz (any 6 MHz channel) Output Power Rating...................................................... 25 watts average DC voltage and total current of final amplifier stage.. 10 volts DC at 32.5 amps (Class A - Not RF power dependent) Performance Specifications Operating Frequency Range ...................
5765 25 WATT POWER AMPLIFIER DRAWING LIST Power Detector/Control Board.......................................................................1586-1118 Schematic ..............................................................................................1586-3118 25 Watt Power Amplifier Assembly .................................................................1586-1117 Interconnect ..........................................................................................
5765 25 WATT DIGITAL AMPLIFIER SYSTEM DESCRIPTION The 5765 is a digital amplifier capable of operating at a nominal output power of 50 watts average. The 5765 is comprised of a 25W Power Amplifier Subassembly, a Power Factor Corrected (PFC) Front End Module, Peak Detector/Control Board, and a directional coupler. Combining the latest in GaAs FET amplifier technology and Feed Forward distortion cancellation, the 5765 delivers an output power of 25 watts (average).
SPECIFICATIONS Technical Specifications Type of Emissions ....................................................................6M00D7W Frequency Range ..... 2150 to 2162 and 2500 to 2686 MHz (any 6 MHz channel) Output Power Rating...................................................... 25 watts average DC voltage and total current of final amplifier stage.. 10 volts DC at 32.5 amps (Class A - Not RF power dependent) Performance Specifications Operating Frequency Range ...................
5765 25 WATT POWER AMPLIFIER DRAWING LIST Power Detector/Control Board.......................................................................1586-1118 Schematic ..............................................................................................1586-3118 25 Watt Power Amplifier Assembly .................................................................1586-1117 Interconnect ..........................................................................................
MAINTENANCE AND TROUBLESHOOTING Problem Analysis In most cases, the performance of a GaAsFET transistor is closely tied to the DC operation of the system. Any degradation in signal quality, gain or power is usually related to a corresponding change in a DC parameter somewhere in the system. An exception may be a defective RF input or output connection, which can result in poor performance of the amplifier with all DC parameters appearing normal.
The amount of cleaning necessary depends greatly on the conditions in the translator room. While the electronics have been designed to function well even if covered with dust, heavy buildups of dirt and insects will impede the effectiveness of the cooling and lead to shutdown or premature failure. When it is apparent that the front panel is becoming dust covered, the top cover should be opened and the accumulated foreign material removed.
