Motorola APX 1000 Detailed Service Manual page 709
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Also See for APX 1000:
- Basic service manual (526 pages) ,
- User manual (94 pages) ,
- Quick reference manual (46 pages)
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Theory of Operation: Main Board
Termination
GPS
Rev
Power
Detector
LNA
UHF2
Figure 3-4. Transceiver (UHF2) Block Diagram (Power and Control Omitted)
Batt. DC Supply
Current
Current
Sense
Sensor
Circuit
DC Supply to FET PA & Driv. Amp.
Harmonic
Filter
coupler
o
15dB Step Attn
16.8MHz
TRIDENT IC
PRESCALAR
BUFFER
16.8MHz
BUFFER
UHF2
Power Control Voltage (Vctrl)
Antenna Switch
FET
UHF
LOOP
RX VCO
FILTER
PRE
TX VCO
BUFFER
IF Filter
Mixer
Indicates Sub-shield
Driver
Amplifier
TX
TX
BUFFER
TX LO
RX
RX LO
RX SSI Data
Abacus
RX SSI Frame Sync
2nd
LO
3-5
FGU
Transmitter
Receiver
RX SSI Clock
- Quick Links:
- Figure 3-1. Apx 2000/ Apx 4000/...
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