User's Manual

Open Information
DESCRIPTION 11 ( 25 )
ERA/RGN/PD Jennie Bergström 5/1551-HRB 105 102/1 Uen
ERA/RKF/TU Carl Helander 2003-01-28 C
Prepared (also subject responsible if other) No
Approved Checked Date Rev Reference
E
• channel filtering
• delay and gain adjustment
• A/D and D/A conversion
• RF modulation and demodulation
A TRXB comprises two independent transceivers for two transmitter and
receiver signal pairs.
4.5 MCPA Subrack
The MCPA subrack contains the linear power amplifiers for the RF carriers.
The subrack contains positions for up to six MCPA modules and is connected to
the RF subrack through front panel cabling.
4.5.1 MCPA
TheMCPAisa20WRFpoweramplifier.
4.5.2 MCPA Hub
The MCPA Hub is the connection interface between the MCPA and the RFIFB.
4.6 Transmission Interfaces
The cabinet can be equipped and configured for various transmission network
needs from one to 32 E1/J1 interfaces and/or one to four STM-1 interfaces.
The Interfaces are as follows:
• E1 — 2 Mbit/s, Transmission Link (European standard)
• J1 —1.5 Mbit/s, Transmission Link (Japanese standard)
• STM-1 — 155 Mbit/s, Synchronous Transfer Mode on level 1
4.7 Internal Cables
This section gives a brief description of the internal RBS cables.
4.7.1 Inter-Subrack Link
This cable is a common platform ATM interface cable for inter-subrack
communication. It carries control signaling from the MP to device boards
in other subracks. This interface cable is a high-speed point-to-point
communication link.