Ericsson 1/KRB 101 1108 Installation, Operation And Maintenance Instructions
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Ericsson 1/KRB 101 1108 Installation, Operation And Maintenance Instructions

Multi-carrier power amplifier mcpa
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MULTI-CARRIER
POWER AMPLIFIER
Product Number 1/KRB 101 1108
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
Ericsson Amplifier Technologies Inc.
Technical Publication MCPA
PROPRIETARY AND PRIVATE
The information contained in this document is the property of Ericsson
Amplifier Technologies Inc., (Company) and shall be kept in strict
confidence. Except with the written permission of the Company, such
information shall not be published, or disclosed to others, or used for
manufacture or sale or for any other purpose. This document shall not be
duplicated in whole or in part. Any recipient so agrees by acceptance of this
document.
ERICSSON AMPLIFIER TECHNOLOGIES INC.
49 Wireless Boulevard
Hauppauge, New York 11788
MCPA
Revision A
PREPARED
May 23, 2001
NOTICE
(631) 357-8200

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Summary of Contents for Ericsson 1/KRB 101 1108

  • Page 1 May 23, 2001 NOTICE PROPRIETARY AND PRIVATE The information contained in this document is the property of Ericsson Amplifier Technologies Inc., (Company) and shall be kept in strict confidence. Except with the written permission of the Company, such information shall not be published, or disclosed to others, or used for manufacture or sale or for any other purpose.
  • Page 2 All comments should be directed via regular mail to the address listed on the title page of this document. Ericsson Amplifier Technologies may use or distribute any of the information supplied in any way it believes appropriate, without incurring any obligations.
  • Page 3 ENABLE: FAN ALARM: LOOP ALARM: VSWR ALARM: POWER SUPPLY ALARM: TEMPERATURE ALARM: OVER POWER ALARM: UNIT SURFACE TEMPERATURE: _______________________________________________________ POWER SUPPLY MODEL OR CAPABILITY: _______________________________________________ ____________________________________________________________________________________ OTHER DETAILS OF PROBLEM REPORTED:______________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 4: Table Of Contents

    Amplitude and Phase Adjustment ..................19 4.4.4 Amplifier Module Cooling....................20 Power Distribution......................... 20 Intermodulation Distortion Performance ................20 4.6.1 Intermodulation Distortion ....................20 Description of Operating Modes................... 20 4.7.1 Default mode ........................20 © 2001 – Ericsson Amplifier Technologies Inc.
  • Page 5 Troubleshooting Procedures....................27 Fan Assembly Replacement Procedure ................27 List of Figures Figure 1. Ericsson Amplifier Technologies Inc. Multi-Carrier Power Amplifier.....2 Figure 2. Outline/Installation Drawing, Ericsson Amplifier Technologies MCPA ....6 Figure 3. MCPA Local Controls and Indicators..............11 Figure 4. MCPA Power ON/OFF Sequence................14 Figure 5.

  • Page 6: General Description

    1. GENERAL DESCRIPTION 1.1 Introduction This manual provides information for the installation, operation and maintenance of Ericsson Amplifier Technologies MCPA multi-carrier power amplifier. The manual is organized in 6 sections as follows: • Section 1. General Description • Section 2. Installation •...

  • Page 7: Equipment Functional And Physical Specifications

    Figure 1. Ericsson Amplifier Technologies Inc. MCPA Power Amplifier 1.4 Equipment Functional and Physical Specifications Table 1 lists the functional and physical specifications of the MCPA power amplifier. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 8: Mechanical Description

    Cooling is provided by 2 integral rear mounted fans that are easily replaced without the need for chassis disassembly, or removal of power to the amplifier. Airflow through the MCPA is from front through the rear of the unit. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 9: Installation

    Section 3 before operating the equipment. 2.2 Electrical Service Recommendations Ericsson Amplifier Technologies strongly recommends the use of AC line conditioning and surge suppression devices at the primary AC input to the power source for the MCPA. All electrical connections should be in accordance with the National Electric Code, and any applicable state and local codes.

  • Page 10: Environmental Limitations

    The amplifier is produced in a Blind Mate configuration as shown in Figure 2. The Blind Mate configuration is designed for mounting in an Ericsson Amplifier Technologies subrack, and features a single connector on the rear panel for all RF, DC and I/O interface connections.

  • Page 11: Figure 2. Outline/Installation Drawing, Ericsson Amplifier Technologies Mcpa

    © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 12: Cable Interconnections

    Data Out 1 RS-232 TXD_PS Data In 1 Signal Ground Ground RUN/PGM PS RS-232 TXD_IMD Data Out 2 RS-232 RXD_IMD Data In 2 RUN/PGM IMD PA ID, GND 15-17 No Connection No Connection © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 13: Verify Connections

    MCPA FROM IMPROPER SUPPLY APPLICATION. NOTE When +27VDC is initially connected and applied to the MCPA, all of the LED’ s on the front panel except for the DC On will illuminate momentarily. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 14: Operating Instructions

    Only trained personnel are to service and adjust the amplifier. Personnel must be trained in the maintenance of equipment with hazardous RF power, and must be familiar with this amplifier. In addition, the following precautions must be observed during operation. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 15: Controls And Indicators

    I/O interface for remote status monitoring and control. The following paragraphs detail these features. 3.2.1 Local Controls and Indicators Figure 3 is the front view of the MCPA. Table 3 describes the local controls and indicators. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 16: Figure 3. Mcpa Local Controls And Indicators

    DC ON/OFF SWITCH ENABLE AND INDICATOR SWITCH ENABLE LED FAN LED LOOP LED VSWR LED PWR SPLY LED TEMP/WARN LED OVER PWR LED Figure 3. MCPA Local Controls and Indicators © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 17: Table 3. Mcpa Local Controls And Indicators

    24 hours. If the alarm is still present, the amplifier will continue to shutdown. The amplifier may also be manually reset using the front panel button. Refer to Figure 4, which details the ON/OFF sequence of the MCPA. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 18: Mcpa Power On/Off Sequence Summary

    After depressing the On/Off switch, both the external +27 VDC and +15 VDC bias are on. Typical current without any RF applied to the MCPA is 18 amps. Depressing the On/Off switch again will turn off the MCPA module completely, as it was initially. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 19: Figure 4. Mcpa Power On/Off Sequence

    18 DEPRESS amps. DC ON/OFF NOTE: If resetting power to the MCPA does not clear the fault condition, contact Ericsson Amplifier Technologies, or return MCPA for service. Figure 4. MCPA Power ON/OFF Sequence © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 20: Remote Control/Status Interface

    ENABLE d. Apply reduced RF input (-40 dBm) to the MCPA RF IN connector within the 869-894 MHz frequency range, and observe that only the DC ON and ENABLE LED indicators remain illuminated. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 21: Normal Operation

    THE DC ON/OFF SWITCH DOES NOT CONTROL THE MAIN +27 VDC FEED TO THE MCPA. IF MAINTENANCE OR SERVICE IS TO BE PERFORMED ON THE MCPA, DEACTIVATE PRIME DC POWER AT ITS SOURCE. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 22: Principles Of Operation

    MAJORFLT – Relay dry contact closure provided for remote notification in the event of a potentially damaging fault condition, which has resulted in shut down of the MCPA. Activation of the LOOP ALARM, VSWR ALARM, POWER SUPPLY ALARM, TEMP © 2001 – Ericsson Amplifier Technologies Inc.
  • Page 23 180 ° phase shifted and amplified signal meets the reference signal. At this point the combined signal, which has a canceled carrier (called the IMD signal), is sent to the IMD leg of the feed forward amplifier. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 24: Main Amplifier

    Figure 4 for sequence. 4.4.3 Amplitude and Phase Adjustment The two loops are controlled via the microprocessor through the main and error driver amplifiers. The amplifiers include vector control circuitry to adjust amplitude and phase © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 25: Amplifier Module Cooling

    When initially powered up (or installed into the shelf), the MCPA amplifier defaults to the standby mode after a brief initialization sequence is completed. During the initialization sequence, the LEDs on the front panel will briefly illuminate. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 26: Standby Mode

    4.7.4 Enable Mode (DC Switch and Enable LED – ON) The MCPA is amplifying the signal. (When used with Ericsson Amplifier Technologies subrack, all power is being combined.) 4.7.5 Shutdown Mode Any of these LEDs ON: VSWR, OVER PWR, TEMP/WARN, LOOP or PWR SPLY The MCPA amplifier has turned itself off for protection.

  • Page 27: Locking Mode

    80 degrees C. . Normal operation can continue, provided the temperature remains below the 90 degree C TEMP/WARN shutdown level. At approximately 90 degrees C, the TEMP/WARN indicator will switch to a red color, © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 28: Pwr Sply Alarm

    4.8.6 OVER PWR Alarm This LED indicates that output power from the amplifier is above 52.8 dBm. The amplifier will enter the shutdown mode, requiring re-initialization (power up sequence) in order to reset the fault condition. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 29: Figure 5. Block Diagram, Mcpa Power Amplifier

    © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 30: Maintenance

    Cables and 12 Months Inspect all cables for any signs of Connectors damage or wear. Check and verify that all connections are secure. Performance 12 Months Perform tests as outlined in paragraph 5.2.3. Tests © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 31: Cleaning Air Inlets/Outlets

    6673A 5.2.3 Performance Tests Performance tests should be performed at 12-month intervals, or as directed by the resident maintenance authority, to ensure that the MCPA is functioning properly and within expected specification limits. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 32: Troubleshooting Procedures

    2 quick disconnects on the fan assembly to the rear panel of the amplifier chassis. Replacement fan assemblies (part number BKV 106 59/1) can be ordered directly from Ericsson Amplifier Technologies. © 2001 – Ericsson Amplifier Technologies Inc.

  • Page 33: Figure 6. Mcpa Troubleshooting Flow Chart

    Figure 5. If fault returns, LOOP ALARM LED contact Ericsson Amplifier illuminated? Technologies for assistance, or return MCPA for service. Continue to sheet 2 Figure 8. MCPA Troubleshooting Flow Chart (Sheet 1 of 2) © 2001 – Ericsson Amplifier Technologies Inc.
  • Page 34 MCPA for service. If problem remains or is not listed, contact Ericsson Amplifier Technologies for assistance, or return MCPA for service. Figure 8. MCPA Troubleshooting Flow Chart (Sheet 2 of 2) © 2001 – Ericsson Amplifier Technologies Inc.

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