User Manual

GSM Dual Amplifier Booster/ Combiner
CCI Model Number DAB-1819 & DAC-1819
With
Ericsson RBS-2106/2206 GSM Base Transceiver Station
USER’S GUIDE
Product Description:
DAB-1819 & DAC-1819 Dual Amplifier Booster/ Combiner:
The CCI GSM Dual Amplifier-Booster Module (DAB) consists of two linear power
amplifiers with intermodulation level control circuitry, each capable of generating a
65-70 Watt GSM signal. The Dual Amplifier-Combiner Module (DAC) is identical to
the DAB Module with the exception of a passive hybrid combiner at the output which
combines both signals to provide two 30-35 Watt GSM signals on a common output.
RBS-2106 & RBS-2206 GSM Base Transceiver Station:
The Base Transceiver Station (BTS) is a GSM Base Station which serves one cell
and is controlled by the Base Station Controller (BSC). The RBS-2106 and RBS
2206 designate the outdoor and indoor versions of the BTS respectively. The BTS
contains the radio transceivers and all the digital signal processing equipment. The
BTS contains six double Transceiver Radio Unit’s (dTRU’s) for a total of twelve
transceivers per BTS. The dTRU consists of two synthesized transmitters (TRX)
operating in the frequency band of 1930 to 1990 MHz. There are 299 channels
available with a channel spacing of 200 KHz. The transmitter is a constant envelope
using 0.3 GMSK modulation, which is MSK filtered with a Gaussian filter, having a
BT product of 0.3. The transmitter is capable of operating in a Time Division Multiple
Access (TDMA) system. For each channel there are 8 time slots available, each
containing digital speech or data.
Operation Description:
The DAC-1819 and DAB-1819 Dual Amplifier Booster/ Combiner in conjunction with
the RBS 2106/2206 BTS are designed to supply a nominal output power level of 47.5
dBm when used in the uncombined mode and 44.5 dBm when used in the combined
mode at the antenna connector. A system block diagram is shown on diagram #1
and #2.
COMMUNICATION
COMPONENTS INC
Extending Wireless Coverage
89 Leuning Street Phone: [phone]
2
nd
Floor Fax: [phone]
South Hackensack, NJ 07606 www.cciproducts.com