User Manual

Table Of Contents
System Description RF-Orchestra!™ Transmitter Installation and Operation
2-16 6880493G02-C July 2000
Figure 2-7: Exciter Block Diagram
DC-DC Converter
The DC-DC converter provides the OCB and Exciter with +5-volt and +14-volt regulated DC
voltages (see Figure 2-8). These voltages are taken from the +28-volt secondary output on one
of the power supplies.
Note: The first powered AC power supply provides +28 V to the input of the RF-O! transmitter and
RF-B! transmitter controller DC-DC converters.
Tranlin IC
Circuitry
VCO
Address Decode
and A/D Converter
Circuitry
Synthesizer
Circuitry
Synthesizer
Circuitry
VCO
Circuitry
VCO
Circuitry
Exciter IC
Circuitry
AGC
Circuitry
Predriver
1 PA/4 Way
Differential Data
2.1 MHz
1st LO
Chip Select
Address
SPI Bus
Chip Select
RF
IF
RF Out
Transmit Frequency
To/From
Control Module
302SRH-55