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Chapter 1

1.0 GP340/GP380 Model Chart .................................................................................1-1

2.0 Technical Specifications ......................................................................................1-2

Chapter 2

1.0 Lowband Transmitter ...........................................................................................2-1

1.1 Power Amplifier (PA) ......................................................................................2-1

1.2 Antenna Switch...............................................................................................2-2

1.3 Harmonic Filter ...............................................................................................2-2

1.4 Antenna Matching Network ............................................................................2-2

1.5 Power Control Integrated Circuit (PCIC) ........................................................2-2

1.6 Temperature Cut Back Circuit ........................................................................2-2

2.0 Lowband Receiver ...............................................................................................2-3

2.1 Receiver Front-End ........................................................................................2-3

2.2 Receiver Back-End.........................................................................................2-4

2.3 Automatic Gain Control (AGC) .......................................................................2-5

2.4 Frequency Generation Circuit.........................................................................2-5

3.0 Synthesizer ..........................................................................................................2-6

4.0 Voltage Control Oscillator (VCO) .........................................................................2-7

4.1 Receive VCO..................................................................................................2-7

4.2 Transmit VCO.................................................................................................2-7

4.3 Buffer ..............................................................................................................2-7

4.4 Diplexer and Output Filters.............................................................................2-7

4.5 Prescalar Feedback........................................................................................2-7

Chapter 3

1.0 Receiver (Sheet 1 of 2) ........................................................................................3-1

2.0 Receiver (Sheet 2 of 2) ........................................................................................3-2

3.0 Transmitter...........................................................................................................3-3

4.0 Synthesizer ..........................................................................................................3-4

5.0 Voltage Controlled Oscillator ...............................................................................3-5

Chapter 4

LOWBAND SCHEMATICS

1.0 Allocation of Schematics and Circuit Boards .......................................................4-1

1.1 Controller Circuits ...........................................................................................4-1

2.0 Schematics ..........................................................................................................4-3

3.0 Parts List ............................................................................................................4-12

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Table of Contents