Andrew Base Station Subsystems Group 100978MCPA 1960 CDMA Multiple Carrier Power AmplifierRF100978 User Manual Introduction

Download:
Mirror Download [FCC.gov]
Document ID	922756
Application ID	+5BNZkv//aDPTSBJ5tftnQ==
Document Description	Users Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	21.63kB (270325 bits)
Date Submitted	2008-04-02 00:00:00
Date Available	2008-04-02 00:00:00
Creation Date	2008-03-21 18:27:01
Producing Software	Acrobat Distiller 7.0 (Windows)
Document Lastmod	2008-03-23 10:25:39
Document Title	Introduction
Document Creator	Acrobat PDFMaker 7.0 for Word
Document Author:	Sridhar Arunachalam

1960 CDMA Multiple Carrier Power Amplifier
Model: RF100978
Operation Instruction
Date: Mar 19, 2008
Version. 1.1
Ref# FCC ID S8L-100978MCPA
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
1 of 8
Introduction
This document presents description of the Andrew Corporation 1960 CDMA Band MCPA
(Multi-Carrier Power Amplifier) amplifier. The MCPA amplifier is a high power, RF
amplifier intended to provide signal amplification and conditioning. The MCPA
amplifier is compatible with CDMA air interfaces operating in U.S. domestic cell sites
where FCC compliance is mandatory.
The 1960 CDMA band (1930 MHz to 1990 MHz) RF power amplifier is capable of
amplifying multiple carriers to a composite power level of 75 Watts.
MCPA Specifications
The RF100978 provides linear amplification of multi-carrier signals in the CDMA
frequency band. The specifications are:
Parameter
Operating RF Band
Instantaneous BW
Input DC Power
DC voltage input range
Rated Output Power
@ ≥ 18 to 30 VDC input
Rated Power per Carrier
DC-RF Efficiency
Input signal type
Physical dimensions
Weight
Cooling technique
Temperature Range
Specification
1930MHz – 1990MHz
15MHz
+24 VDC, nominal
+18VDC to +30VDC
75W composite average
37.5W (2 carriers) 25W (3 carriers)
>27%, rated output power, nominal
input voltage @ 25°C
CDMA (IS-95)
16.1” (H) x 3.54” (W) x 15.7”(D)
35lbs
External fan tray or shelf
-5°C to +55°C operational
Table 1 MCPA Specifications
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
2 of 8
The amplifier has been designed to support an instantaneous bandwidth of 15 MHz.
Multiple carriers may be placed within a continuous 15 MHz span in the CDMA band
and the product shall meet specified performance marks.
The amplifier has a nominal gain of 47.5 dB. The MCPA is designed to meet IS-95
specifications over frequency, temperature (-5°C to +55°C), and power level (up to a
maximum of 75W RF output power).
Functional Blocks:
The 1960 CDMA MCPA is comprised of the following functional areas:
- Predistortion Circuit
- Main amplifier Stage
- Power conversion and conditioning circuit
- Controller circuit
- Communications circuit
Inputs and Outputs:
The amplifier is powered from a DC supply voltage which can range from +18V to
+30V. The DC power is brought into the amplifier through a D-Sub connector located on
the front faceplate of the amplifier.
A second D-Sub connector located on the amplifier front faceplate is used for RS-485
communication. This connector is used for amplifier configuration, monitoring and
alarms.
Alarms and operating state are communicated to the outside world through the RS-485
communications bus and a visible bi-color LED located on the amplifier front faceplate.
The RF signal is brought into the amplifier through one SMA type connector located on
the front faceplate of the amplifier. The amplifier RF signal is brought out of the
amplifier through a N type connector located on front faceplate of the amplifier
Control System:
A microprocessor controller is used to control the amplifier alarm system, control
environmental compensation of the amplifier, and to maintain a linearization solution for
the predistortion circuit.
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
3 of 8
Figure 1 RF100978 MCPA Front Panel
Figure 2 RF100978 MCPA Back Panel
Figure 3 RF100978 MCPA Top & Bottom Panels
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
4 of 8
Figure 4 RF100978 MCPA Side Panels
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
5 of 8
The following table is a summary of detailed alarms within the MCPA. The alarms are
mapped to front panel LED behavior, as indicated. Additionally, the alarms are available
at the D-Sub connector at on the front faceplate of the MCPA.
Condition
Initial Power
On, no
alarms
Gain Control
Alarm
Type
Description
Minor
Automatic Gain Control
Loop out of specification
Output Inter-modulation
Products are out of
specification
High Temperature Warning
Green
DC Voltage regulation out
of range Warning
High DC Power
Consumption Warning
Green
Partial failure within RF
chain, RF output is backed
off
Overload Temperature
threshold reached. Unit will
shutdown
Failure within DC/DC
converter. Unit will
shutdown
Overload DC Power
Consumption. Unit will
shutdown
Green
Linearization
Minor
High
Temperature
Warning
DC voltage
regulation
High DC
power
consumption
Partial Main
Amp Failure
Minor
Temperature
Overload
Major
DC/DC
converter
Shutdown
DC Power
Consumption
Overload
Major
Minor
Minor
Minor
Major
LED
Color
Red
Green
Green
Green
Red
Red
Red
Table 2 Alarm mapping for MCPA
Note 1: During a Minor Alarm event, RF output is enabled, however, the product may be
out of specification. Minor Alarms are recoverable.
Note 2: During a Major Alarm event, the unit will shutdown for self-protection. Major
Alarms are non-recoverable and require a Reset or cycling of the power switch
Note 3: Details as to the specific alarm event are retrieved through the front panel RS485 interface.
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
6 of 8
The following table shows the pin out for the D-sub connector including the alarm pins.
Signal
Manual Control
GND
PA-Enable-Actif +
PA-Enable-Actif PA_Presence_Reset
GND_Presence_Reset
Reserved
GND
Reserved
Reserved
GND
Reserved
Red LED
UART TX + (TRM to
MCPA)
UART TX - (TRM to
MCPA)
Reserved
UART RX + (MCPA to
TRM)
UART RX - (MCPA to
TRM)
GND
Green LED
Description
Control ON/OFF
Ground
Control
Control
Towards Micro Controller
Ground
Not allowed for the MCPA
Ground
Not allowed for the MCPA
Not allowed for the MCPA
Ground
Not allowed for the MCPA
LED
Exchanged Information
Pin Number
10
11
12
13
14
Exchanged Information
15
Not allowed for the MCPA
Exchanged Information
16
17
Exchanged Information
18
Ground
LED
19-24
25
Table 3: Pin out for D-Sub connector
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
7 of 8
Installation and Operation Set-Up
The MCPA must be installed into a shelf that provides fan-cooling. The MCPA requires
+24VDC with a current handling capacity of up to 12.4A. An RS-485 interface is
provided and must be utilized to configure the PA for operation and monitoring of alarms
and status. RF cables connect from a radio source to the SMA-type input; from the Ntype output to a filter-duplexer module.
FCC Statements:
FCC ID S8L-100978MCPA
This device complies with Part 2, 15 & 24 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.
Warning
Changes of modifications not expressly approved by the manufacturer could void the
user’s authority to operate the equipment.
Andrew Corporation
Proprietary – Use pursuant to Company Instruction
8 of 8

---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.4
Linearized                      : No
Create Date                     : 2008:03:21 18:27:01-04:00
Modify Date                     : 2008:03:23 10:25:39-03:00
Company                         : Andrew Corporation
Source Modified                 : D:20080321222604
Tagged PDF                      : Yes
Producer                        : Acrobat Distiller 7.0 (Windows)
Mod Date                        : 2008:03:23 10:25:39-03:00
Creation Date                   : 2008:03:21 18:27:01-04:00
Author                          : Sridhar Arunachalam
Headline                        : 
Creator Tool                    : Acrobat PDFMaker 7.0 for Word
Metadata Date                   : 2008:03:23 10:25:39-03:00
Keywords                        : 
Document ID                     : uuid:65c7cd85-6b67-45b8-8326-36c970230d03
Instance ID                     : uuid:ee94aad2-6a2e-4ddf-9299-adea7bc5fbc9
Version ID                      : 3
Format                          : application/pdf
Title                           : Introduction
Creator                         : Sridhar Arunachalam
Subject                         : 
Page Count                      : 8
Page Layout                     : OneColumn

EXIF Metadata provided by EXIF.tools