Rohde & Schwarz M3SR Series 4100, Service Manual, Page: 51 / 138

Radio Controller - Function R&S M3SR Series 4100 HF Transceivers
1.15 6124.9007.82.01
1.3.2.4 Radio Controller - Function
The Radio Controller communicates with the other radio modules and controls all internal processes. It
basically provides the following functions:
¾ Distribution of signals for modules, submodules and optional modules, mechanical support for
sub-assemblies (codec boards)
¾ Narrowband and wideband audio functions
¾ Provision of serial digital IF interface to RF modules
¾ AF and IF signal processing, voice compressor
¾ Provision of plain and secure link services, EPM operation
¾ Control of internal and external RF modules via the Radio Control Bus (RCB)
¾ Back-up and Erase functions
¾ IBIT (Initiated Built-in Test), PBIT (Power-on Built-in Test), CM (Continuous Monitoring)
¾ Provision of several external communication interfaces like RS232, Ethernet 10/100 Base T
¾ Filtering of internal and external interfaces
Basic Functional Blocks
The basic functional blocks of the Radio Controller are (see Fig. 1.6):
¾ Main Processor CPU with external memory (FLASH memory and SDRAM)
¾ Signal processors DSP-1 for IF / AF processing with internal memory
¾ Signal processors DSP-2 for baseband processing with internal memory
¾ FPGA with
• interface between FPGA and CPU
• two PLL's to generate internal clocks
¾ CPLD with erase and reset functions