Figure 3-8. Transmitter Block Diagram (Vhf); Figure 3-9. Transmitter Block Diagram (Uhf1 And Uhf2) - Motorola APX 5000 Service Manual

Theory of Operation: Transceiver Board
TX Buffer Amp
RF Switch Matrix
TX Buffer Amp
TX Driver Amplifier
TX VCO
RX VCO
RF Switch Matrix
Transmitter FET VHF
TX Driver Amplifier
Loop Filter
TX VCO
Module
RX VCO
Module

Figure 3-8. Transmitter Block Diagram (VHF)

Transmitter FET UHF
Loop Filter
Module
Module

Figure 3-9. Transmitter Block Diagram (UHF1 and UHF2)

SP3T RF Switch
Harmonic LP Filter
To RX
Trident IC
Synthesizer
TX SSI from VOCON
SP3T RF Switch
Harmonic LP Filter
To RX
Trident IC
Synthesizer
TX SSI from VOCON
Log Amp Power Detector
Digital RF Attenuator
Antenna Connector
Directional
Coupler
Reverse Power Detection
Ref. Oscillator
Log Amp Power Detector
Digital RF Attenuator
SP2T
Directional
Coupler
Reverse Power Detection
Ref. Oscillator
3-11
To Antenna
To RMT Port