Motorola APX 2000 - Figure 3-14. Synthesizer Block Diagram (UHF1;UHF2); Figure 3-15. Synthesizer Block Diagram (700;800 Mhz)

Theory of Operation: Main Board 3-17
Figure 3-14. Synthesizer Block Diagram (UHF1/UHF2)
Figure 3-15. Synthesizer Block Diagram (700/800 MHz)
TRIDENT IC
LOOP
FILTER
PRESCALAR
BUFFER
16.8MHz
16.8MHz
BUFFER
PRE
BUFFER
TX LO
RX LO
TX
BUFFER
UHF RX
TX VCO
RX VCO
16.8MHz REFERENCE CLOCK (To Controller and Abacus IC)
UHF TX
TRIDENT IC
LOOP
FILTER
PRESCALAR
BUFFER
16.8MHz
16.8MHz
BUFFER
PRE
BUFFER
TX LO
RX LO
TX
BUFFER
7/800 RX
VCO 1
VCO 2
VCO 3
16.8MHz REFERENCE CLOCK (To Controller and Abacus IC)
7/800 TX