User Manual

SPRINT User Manual
iDEN 30dBm
9
- Power Amplifier part for power amplifier and Level Monitoring/VSWR monitoring to
adjust desirable output power of Repeater
800MHz IF Converter part is designed to select single path, and it can be minimizing signal
interference between paths, and power consumption according to controls of electric power in
each SAW Filter part.
<Pic.5> iDEN In-building RF Repeater Uplink Block Diagram
2.2.4 Adjustable Band Edge functional circuit configuration
In case of IDEN using the bandwidth of 800MHz and 900MHz, many of Out of Band Signals is
input via Donor ANT Outdoor. The most worried signal among them is Paging Signal.
Commercial Paging Signal of 929MHz~932MHz, 940MHz~941MHz, having the strength of Max.
-15dBm, is to be inputted into Donor ANT. Among this two kind of Paging Signal Band,
929MHz~932MHz bandwidth is possible for sufficient Rejection via SAW Filter, But
940MHz~941MHz is difficult to gain big decreasing volume even if use SAW Filter because Band
Edge is as close as to be folded to 935MHz~940MHz of being the frequency of iDEN900MHz
Downlink.
To prepare for this environment, Down Link of iDEN Repeater is designed to have additional