Service manual

Description: Functional Theory of Operation 1-15
Figure 1-5 Exciter Module Functional Block Diagram
Backplane Connector
10V 8V 14.2V Bus Bus Bus
SPI Circuitry
- CPLD
- ADC
- NVM
- PLL
PLL
Driver Final
RF
Output
Connecto
r
U4700 U4701
U4800
RF
Switch
LPF
Loop Filter
VCO_1
VCO_2
Switch
Driver
SSI Bus
Buffer
Pre-Scalar
U4500
Ex Enable
Regulators
Amplifiers Phase-Locked Loop VCO RF Switch Circuitry
Q4602