Service Manual

GSM-205-323
CTU
31st Oct 01
Tech. 5–16
Technical Description: Horizon macro indoor
CONTROLLED INTRODUCTION
68P02902W07-B
CTU digital
processing and
control
functions
The CTU digital processing and control function provides control and RF
processing for that CTU. These functions include:
 2.048 Mbit/s links which interface with up to two MCUFs for redundancy.
 A software processing platform for the radio sub system (RSS)
 A digital signal processor (DSP) for radio control and channel equalization
(EQCP).
 A DSP for channel coding, data routeing, and baseband hopping (CCCP).
 Control of RF systems: diversity receiver, transmitter, and power amplifier.
 Alarm monitoring of internal devices and external cabinet elements.
 Control of external modules including CCBs, and the SURF.
 Maintenance ports for processor TTY, test point sub system, and CTU test
connections.
Figure 5-9 shows a CTU digital functional diagram.
Figure 5-9 CTU digital functional diagram