Motorola APX 7000 Basic Service Manual page 178

Sec 2: 3-8
RF Switch
TX Buffer Amp
RF Switch Matrix
Figure 3-11. Transceiver (UHF2 and 700–800 MHz) Block Diagram
RF Switch
TX Buffer Amp
RF Switch Matrix
Driver Amplifier
Loop Filter
Trident IC
VCO Module
VCO Module
VCO Module
VCO Module
Driver Amplifier
Loop Filter
Trident IC
VCO Module
VCO Module
VCO Module
Figure 3-12. Transceiver (VHF and UHF2) Block Diagram
Basic Theory of Operation: Analog Mode of Operation
Switch
FET UHF2
Harmonic Filters
FET 700/800
SP3T RF Switch
To RX
Ref. Oscillator
VCO
TX SSI from Vocon
Switch
FET VHF
Harmonic Filters
FET UHF2
SP3T RF Switch
To RX
Ref. Oscillator
VCO
TX SSI from Vocon
Log amp Power Detector
Digital RF Attenuator
SP2T RF Switch
Coupler
Rev Power Detection
Log amp Power Detector
Digital RF Attenuator
SP2T RF Switch
Coupler
Rev Power Detection
To Antenna
To RMT Port
To Antenna
To RMT Port