Axcera 5760 Series User manual

USER MANUAL
5760 Series
25/50/100 Watt Digital
Amplifier
AXCERA, LLC
103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA
[phone] •FAX [phone]
www.axcera.com •[email protected]

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. The left to right arrangement is:
Test point for setting Reflected power
Test Point for setting Peak Forward Power
Test Point for setting Forward Envelope power
RZ Reflected Power Zero adjust
RL Reflected Power Level adjust
GT Gate Timing (for encoded signals)
FL Forward Power Level adjust
FZ Forward Power Zero adjust
GL Gate Level adjust (for encoded signals)
Test Point for Ground

J1 A.C. Input
J2 RF Input “N” connector
J3 Remote/control “D” connector
J4 RF Output “N” connector
J3 Pinouts are:
3Ground
4Remote Forward Power
6Remote Reflected Power
8Operate Command Output
9 Amplifier Interlock
10 Amplifier Interlock Return
15 AGC Outer Loop
16 Remote Overtemp.
18 Amplifier Fault
19 Ground
20 Power Supply Fault

Internal LED Indicators 5760
Enable green
DC OK green
Bias green
MOD OK green
RF O/P green

5765
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).
The unit's circuitry is enclosed in a tray assembly designed for mounting in a standard 19"
equipment rack. The unit comes complete with slide rail mounting hardware to allow the tray
to move in and out of the rack for ease of service. The outside dimensions of the tray
assembly are 19" x 30" x 10.25" (WxDxH).
The 5765 is factory calibrated for a front panel LCD display external power meter reading of
100% on the driver transmitter, which represents the rated output power of the unit (unless
otherwise specified).

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 ................... 2150 to 2162 and 2500 to 2686 MHz
RF output -Nominal:
Power .........12.5 to 25 watts average (adjustable in driver transmitter)
Impedance......................................................................50 ohms
Connector........................................................................ Type N
Input (64 QAM Digital Signal)......................................................... Type N
Out-of-Band Power .......................................-38 dB max (at channel edge)
-60 dB max (3.0 MHz above channel edge and 3.0 MHz below channel
edge)
Electrical Requirements
Power Line Voltage............................................. 208/240 VAC, 50 or 60 Hz
Power Consumption ................................................................1243 watts
Environmental
Maximum Altitude..................................................... 12,000 feet (3,660m)
Ambient Temperature............................................................ 0° to +50°C
Mechanical
Dimensions: (WxDxH) ............... 19" x 30"x 10.25" (48.3cm x 76.2cm x 26.0cm)
Weight: ...................................................................... 85 lbs. (38.6 kgs)

5765
25 WATT POWER AMPLIFIER
DRAWING LIST
Power Detector/Control Board.......................................................................1586-1118
Schematic..............................................................................................1586-3118
25 Watt Power Amplifier Assembly .................................................................1586-1117
Interconnect ..........................................................................................1586-8117
The 25 Watt Amplifier Assembly consist of the following boards/modules:
25 Watt Amplifier Module .............................................................................1585-1266
Schematic..............................................................................................1585-3266
Amplifier Daughter Board..............................................................................1512-1110
Schematic..............................................................................................1512-3110
8 Section Bias Protection Board ....................................................................1586-1109
Schematic..............................................................................................1585-3109
DC to DC Converter Board
Schematic...............................................................................................DT380-11
The Power Factor Corrected Front End Module consist of the following power supplies:
PFC 200W Supply ...........................................................................(VS3) 73-450-0001
40W Switching Supply.......................................................................................LPS23
80W Switching Supply.......................................................................................LPS63

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).
The unit's circuitry is enclosed in a tray assembly designed for mounting in a standard 19"
equipment rack. The unit comes complete with slide rail mounting hardware to allow the tray
to move in and out of the rack for ease of service. The outside dimensions of the tray
assembly are 19" x 30" x 10.25" (WxDxH).
The 5765 is factory calibrated for a front panel LCD display external power meter reading of
100% on the driver transmitter, which represents the rated output power of the unit (unless
otherwise specified).

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 ................... 2150 to 2162 and 2500 to 2686 MHz
RF output -Nominal:
Power .........12.5 to 25 watts average (adjustable in driver transmitter)
Impedance......................................................................50 ohms
Connector........................................................................ Type N
Input (64 QAM Digital Signal)......................................................... Type N
Out-of-Band Power .......................................-38 dB max (at channel edge)
-60 dB max (3.0 MHz above channel edge and 3.0 MHz below channel
edge)
Electrical Requirements
Power Line Voltage............................................. 208/240 VAC, 50 or 60 Hz
Power Consumption ................................................................1243 watts
Environmental
Maximum Altitude..................................................... 12,000 feet (3,660m)
Ambient Temperature............................................................ 0° to +50°C
Mechanical
Dimensions: (WxDxH) ............... 19" x 30"x 10.25" (48.3cm x 76.2cm x 26.0cm)
Weight: ...................................................................... 85 lbs. (38.6 kgs)