Reference Manual

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EN/LZT 720 0242 R1A
1 Product Overview
The dTRU is a 2-TRX replaceable unit. A TRX is a transmitter/receiver and
signal-processing unit, which transmits and receives one carrier. There are
different versions of dTRU depending on the frequency band and modulation
capability, that is, both GMSK and 8PSK (EDGE) or GMSK only.
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 Main Functions
The dTRU is a distributed main CPU DMCN and its main functions are:
• Transmits and receives radio frequency signals – GMSK or 8PSK
modulation
• Processes signals
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 7.6 kg
3 Power Consumption and Heat Generation
Table 2 Power consumption and heat generation
Max. power consumption Max. heat generation
485 W 380 W