User Manual

Table Of Contents
RF-Orchestra!™ Transmitter Installation and Operation System Description
July 2000 6880493G02-C 2-15
Figure 2-6: OCB Block Diagram
RF Exciter Module
The RF Exciter module converts high-speed, digital baseband data generated by the OCB to
selected RF frequencies. A custom linearization integrated circuit (IC) with a built-in inphase
and quadrature (I/Q) digital modulator accurately shapes waves for broadcasting ReFLEX or
InFLEXion protocol messages. The output of the Exciter is the station carrier frequency with
the appropriate modulation needed for FLEX, ReFLEX, and InFLEXion protocol message
delivery to the communicators (see Figure 2-7).
Exciter
PNP Data Port
(input)
I/O Ports
LEDs (8)
Switch
Local (FIPS)
Front Panel
Maintenance Port
Async 9600 bps
RS-232
RS-485
RS-232
Buffers
DSPs
Host
Microcontroller
RS-485
Factory Use Only
SPI Bus
Flash
EEPROM
RAM
Xilinx
#1–4