User Manual

Ericssonwide Internal
DESCRIPTION 3 ( 8 )
/ XSNSIXI 8/1551-LZA 701 0001 Uen
CBC/XRX/M (Kai Lian) 2011-05-05 C
Prepared (also subject responsible if other) No.
Approved Checked Date Rev Reference
versions of dTRU EDGE have limitations on VAMOS. For details, please refer
to document BTS Parameter Limitations.
The dTRU has two TX antenna terminals and four RX antenna terminals. The
dTRU features a built-in hybrid combiner. The hybrid combiner can be used to
combine the two TX antenna terminals to one common terminal.
Two of the RX antenna terminals are used for 2-branch diversity reception.
The dTRU is hardware prepared for 4-branch diversity reception through the
remaining two antenna terminals.
1.1.1 Main Functions
The dTRU is a distributed main CPU DMCN and its main functions are:
• Transmits and receives radio frequency signals - GMSK, 8-PSK, 16-QAM
or 32-QAM modulation
• Processes signals
1.1.2 Variants
There are two dTRU variants available:
• Built in hybrid combiner connected through jumper cables
• Built in hybrid combiner connected through a switching relay
1.2 Dimensions
The dTRU has the following dimensions:
Table 1 Size and Weight
Height Width Depth Weight
400 mm
(9 HE x 44.45 mm)
71 mm
(14 TE x 5.08 mm)
270 mm
6.2/7.6 kg
1.3 Power Consumption and Heat Generation
Table 2 Power Consumption and Heat Generation
Max. power consumption Max. heat generation
485 W 380 W