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GPA-9 manual

Table of Contents

Important Information ............................................................................................................ 3

RF Exposure ................................................................................................................... 3

FCC Approval Notice ...................................................................................................... 3

FCC Part 90 Information ................................................................................................. 3

Product Description ........................................................................................................ 4

Power Control Loop ........................................................................................................ 4

Interfaces ..................................................................................................................................... 5

J102 Terminal Block ....................................................................................................... 5

J100 RF Output .............................................................................................................. 5

J101 RF Input ................................................................................................................. 5

R138 Power Control Adjustment .................................................................................... 5

LED Indicators ................................................................................................................ 5

Installation ............................................................................................................................. 6

Mounting the Unit ........................................................................................................... 6

Connecting the Unit ........................................................................................................ 6

3.3 Alignment (Setting power output) ...................................................................................... 6

3.4 Overtemperature Fault ....................................................................................................... 6

3.5 VSWR Fault ....................................................................................................................... 6

GPA-9B smaller heat-sink option ................................................................................................ 7

GPA-9 standard heat-sink option ................................................................................................ 7

Unit Specifications ....................................................................................................................... 8

Technical Assistance ............................................................................................................ 8

Change Log ........................................................................................................................... 8

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Summary of Contents for MDS GPA-9

Page 1: ...GPA 9 manual GE MDS GPA 9 Manual P N draft Rev D ...

Page 2: ... J102 Terminal Block 5 1 7 J100 RF Output 5 1 8 J101 RF Input 5 1 9 R138 Power Control Adjustment 5 1 10 LED Indicators 5 2 Installation 6 2 1 Mounting the Unit 6 2 2 Connecting the Unit 6 3 3 Alignment Setting power output 6 3 4 Overtemperature Fault 6 3 5 VSWR Fault 6 GPA 9B smaller heat sink option 7 GPA 9 standard heat sink option 7 Unit Specifications 8 3 Technical Assistance 8 4 Change Log 8...

Page 3: ...s a licensed Amplifier per FCC Part 90 It is approved for use under the following conditions Changes or modifications not expressly approved by GE MDS will void the user s authority to operate the equipment 1 3 FCC Part 90 Information For FCC Part 90 valid frequencies are 896 940 MHz at up to 500 Watts ERP Caution Only use authorized antennas that meet the FCC license requirements Use of unauthori...

Page 4: ...pplied to the amplifier from a regulated and filtered DC source capable of supplying 10 16 Vdc at a maximum current of 10 Amperes The DC power source should be current limited or have a protective fuse or circuit breaker 1 5 Power Control Loop The GPA 9 amplifier uses a feedback circuit within the amplifier to control the output power The set point is set by potentiometer R138 accessed near the RF...

Page 5: ...Control Adjustment R138 is used to adjust the RF power output of the amplifier in internal and mode Turn the potentiometer clockwise for higher power and counterclockwise for lower power RF output power will depend on power supply voltage 10 16V DC and RF drive level 27 to 30dBm 1 10 LED Indicators A pair of LED indicators are located next to the Power Adjustment The lower indicator GREEN will ind...

Page 6: ...outside pin is positive the next is negative 3 3 Alignment Setting power output Adjusting RF Power Output To check set the amplifier s RF power output proceed as follows 1 Connect a wattmeter rated for use at 900 MHz and at least 40 watts to the amplifier s RF output connector J102 2 Terminate the wattmeter into a 50 ohm non inductive load 3 Set SD9 PWR 30dBm 27 to 30dBm is allowed 4 Apply RF driv...

Page 7: ...GPA 9 manual GPA 9B smaller heat sink option GPA 9 standard heat sink option ...

Page 8: ...rd 19 inch rack cabinet Approximate Weight 5 15 lbs Dimensions GPA 9A model 5 25 H x 19 W x 2 88 D 13 34 H x 48 26 W x 7 31 D cm Dimensions GPA 9B model 5 25 H x 7 W x 2 88 D 13 34 H x 17 78 W x 7 31 D cm FCC Identifier E5MDS GPA 9 Name of Grantee GE MDS LLC 3 Technical Assistance For assistance contact us using one of the following methods Telephone 585 241 5510 E mail gemds techsupport ge com We...

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