User's Manual

February 2003
Rev. A
Page 10 of 47
1.3. The AU/SU Outdoor Unit General Description
Ethernet
Block
25Mhz
Crystal
power and
data port1
power and
data port2
Digital
Block
44Mhz
Oscilator
SDRAM
132Mhz
IF
Block
data
RF
Block
Synthesizer
(2035- 2125 Mhz)
Operating Range :
2038 - 2110 Mhz
PHY
Block
data
Filter
374Mhz
Synthesizer
(741 - 755 Mhz)
Operate Fixed :
748Mhz
Frequency Control
RF OUTPUT
CH00 = 2.412Ghz
CH01 = 2.417Ghz
CH02 = 2.422Ghz
CH03 = 2.427Ghz
CH04 = 2.432Ghz
CH05 = 2.437Ghz
CH06 = 2.442Ghz
CH07 = 2.447Ghz
CH08 = 2.452Ghz
CH09 = 2.457Ghz
CH10 = 2.462Ghz
CH11 = 2.467Ghz
CH12 = 2.472Ghz
Figure 1-4: Outdoor Unit Block Diagram
The outdoor unit (AU/SU) is composed from the following blocks:
• Ethernet interface – 2 RJ 45 connectors for Ethernet interfaces compliant with
Ethernet/IEEE 802.3 and the power (48 VDC). This block consists of an Ethernet PHY,
Ethernet switch and Ethernet MAC.
• Digital Block – consists of the main HW control logic, the CPU and it peripherals like
memories (RAM, DDR, Flash), Timers, Interrupt controller, UART etc.
• PHY Block – consists of a PHY11B based around INTERSIL Direct Sequence Spread
Spectrum Base-band processor.
• RF/IF Block - Consists of the Modulator/Demodulator and Synthesizer + RF IF converter
and synthesizer based on INTERSIL Prism2 chipset.