User's Manual

8
1. OVERVIEW
COVERCELL 25K is a dual band repeater which can receive and transmit cellular and PCS
signals in the shadow area, which BTS signals cannot reach. This system has 79dB and 85dB
gain in the cellular band and PCS band respectively with 17dBm and 19dBm maximum power
each.
On the following condition, the band select function can be performed on each path in each
band.
- Cellular: A1+A2 or B1+B2
- PCS: 5MHz, 10MHz, 15MHz consecutive block select
- Specific setting is possible using GUI
The basic structure of CoverCell 25K illustrates that each module is built-in on each path in a
body. The functions of each module are as follow.
- 4-Plex Cavity Filter: Duplexing input and output signals in the Cellular and PCS frequency
ranges and band combining.
- Cellular Drive Module: including LNA, Local and PAM in the cellular band
- PCS Drive Module: including LNA, Local, and PAM in the PCS band
- Digital Filter: implementing the bandwidth setting and filtering using a digital technology
each band
- PSU (Power Supply Unit): Converting AC 120V to respective voltages for each module
- Control Board: Checking and controlling each module
- IO Board: playing a role as a terminal between PSU and each module