User's Manual

Table Of Contents
MBSC0800-040-RU
MBSC0800-040-RU July 02, 2014
Page 18
Figure 13Single-band RU Enclosure
3.3.2.1 Primary Components
3.3.2.1.1 Multi-Carrier Power Amplifier (MCPA) Modules
The MCPA Module is the heart of the mBSC RU Enclosure. The MCPA Module boosts the BTS forward link
transmission signal. Operating on28VDC input, the MCPA Module produces 10W or 20 W composite RF
power for each band (measured at output of the antenna combiner).
The mBSC system provides linear amplification of multi-carrier, mixed-mode signals in the 700MHz,
850MHz, 1900MHz, 2100MHz and 2600MHz frequency bands with the respective RUs.
3.3.2.1.2 LNA (Low Noise Amplifier)
The LNA amplifies the reverse link signal with alow-noise amplifier and then sends it to the input duplexer
assembly.
3.3.2.1.3 MCU (Micro Controller Unit)
The MCU provides communications with power amplifier module and CM-BTS. The MCU also monitors and
adjusts the rotational speed of the cooling fans to maintain nominal system operating temperature.