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DHCP
Sub Board
Quad-Plexer
Up Converter
Digital Filter
Figure 3 – Duo-i6525 Repeater Internal Components Diagram
2.3.5. Quad-Plexer
It consists of four BPFs (band-pass filters) each of the four RF signal paths:
SMR 800 (Tx & Rx) and SMR 900 (Tx & Rx)
2.3.6. Digital Filter
It is composed of A/D (analog to digital) and D/A (digital to analog) converters.
It also has a FPGA (field programmable gate array) which has the capability
for superior out-of- band rejection and re-banding.
Advanced RF Technologies, Inc. Proprietary Document
Duo-i6525 RF Repeater
User Manual V1.0
Noise Filter
Quad-Plexer
Down Converter
Controller
Interface Board
Digital Filter
Power Supply
Page 11 of 31
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