MOTOROLA CDM series - PRO series free download

File name CDM-PRO series Detailed Service Manual VHF 136-174 25-45W LDMOS.PDF

Chapter 11: i Chapter 11: VHF (136-174 MHz) 25-45W LDMOS Service Information Table of Contents Section 1 Model Charts and Technical Specifications 1.0 VHF (136-174 MHz) 25-45W LDMOS Model Charts...11:1-1 1.1 CDM Series Model Chart ...11:1-1 1.2 PRO Series Model Chart...11:1-2 2.0 Technical Specifications ...11:1-2 Section 2 Theory of Operation 1.0 Introduction ...11:2-1 2.0 VHF (136-174 MHz) 25-45W LDMOS Receiver Front-End ...11:2-1 2.1 Receiver Front-End ...11:2-1 2.2 Front-End Bandpass Filters and Pre-Amplifier...11:2-2 2.3 First Mixer and 1st Intermediate Frequency (IF) ...11:2-2 2.4 2nd Intermediate Frequency (IF) and Receiver Back-End ...11:2-2 3.0 VHF (136-174 MHz) 25-45W LDMOS Transmitter Power Amplifier (PA) 45W ...11:2-3 3.1 Power Controlled Stage ...11:2-3 3.2 Driver Stage ...11:2-4 3.3 Final Stage ...11:2-4 3.4 Antenna Switch ...11:2-4 3.5 Harmonic Filter ...11:2-5 3.6 Directional Coupler...11:2-5 3.7 Power Control...11:2-5 4.0 VHF (136-174 MHz) 25-45W LDMOS Frequency Synthesis...11:2-5 4.1 Reference Oscillator...11:2-6 4.2 Fractional-N Synthesizer ...11:2-6 4.3 Voltage Controlled Oscillator (VCO)...11:2-7 4.4 Synthesizer Operation...11:2-8 Section 3 1.0 2.0 3.0 4.0 Troubleshooting Charts Troubleshooting Flow Chart for Receiver ...11:3-1 Troubleshooting Flow Chart for 45W Transmitter...11:3-3 Troubleshootin