double-transceiver unit (dtru)

7/23/2019 Double-Transceiver Unit (DTRU)

http://slidepdf.com/reader/full/double-transceiver-unit-dtru 1/26

CAPACITY PLANNING USINGBTS (DTRU)

Lab # 7

Engr. Mehran Mamonai



DTRU

The Double-Transceiver Unit (DTRU) isplace in the ouble-transceiversubs!stem o" the T$. %ne DTRU consists

o" t&o TR's.



DTRU

Functions of the DTRU This escries the "unctions o" the DTRU. The DTRU "unctionall! consists o" thebaseban processing part R transmitting part an R receiving part.

Workin !n"iron#ent of the DTRU This escribes the &or*ing environment o" the DTRU. The DTRUs are inserteinto the slots o" the bac*plane in the DTRU subrac*.

Workin Princi$%es of the DTRU This escribes the &or*ing principles o" the DTRU. The DTRU consists o" theDTRU aseban an R Unit (DRU) DTRU +o&er ,mplier Unit (D+,U) anDTRU +o&er $uppl! Unit (DT+$).

L!Ds &n' Ports on the DTRU This escribes the LEDs an ports on the DTRU panel. There are t&o t!pes o"DTRU t!pe , an t!pe . The "our LEDs on the DTRU panel inicate the

operating status o" the DTRU an other "unctional subs!stems. DTRU (t!pe ,)has /0 ports an DTRU (t!pe ) has 1 ports. These ports e2changes signals &iththe R "ront-en subs!stem.

S$ecic&tions of the DTRU This escribes the si3e &or*ing voltage po&er consumption an &eight o" theDTRU.

http://c/Program%20Files/Huawei/HED/31182714_01.cdp/outfiles/bts3012(for-18trx).files/bts/f-bts3012-hardware-description/ff-1-121.html












Functions of the DTRU

The DTRU "unctionall! consists o" thebaseban processing part Rtransmitting part an R receiving part.

B&se&n' Processin P&rt RF Tr&ns#ittin P&rt

RF Recei"in P&rt



Workin !n"iron#ent ofthe DTRU

This escribes the &or*ing environment o" the DTRU. The DTRUs are inserte into the slots o" the bac*planein the DTRU subrac*.

igure / sho&s the &or*ing environment o" the DTRU.

igure / 4or*ing Environment o" the DTRU

The &or*ing environment o" the DTRU is as "ollo&s

Receiving cloc* signals control signals an atasignals "rom the DTR Moulates the baseban signals into R signals an

then transmits the R signals to the D,U subrac*through R signal cables



Workin !n"iron#ent of theDTRU



Workin Princi$%es of the DTRU

The DTRU consists o" the DTRU aseban an R Unit (DRU)

DTRU +o&er ,mplier Unit (D+,U)

an DTRU +o&er $uppl! Unit (DT+$).



Function&% structure of theDTRU

The DRU is the main "unctional moule o" the DTRU. 5t proviesmoulation6emoulation ata processing ancombining6iviing bet&een the baseban signals an R signals.

The DT+$ is the po&er suppl! boar o" the DTRU. The DT+$

converts the 81 9 D: po&er into ;<1 9 D: po&er "or the D+,U. The DT+$ also supplies three routes o" po&er re=uire b! the TR' 1 9 8 9 an >.> 9.

The D+,U per"orms the "ollo&ing "unctions

,mplies the signals transmitte "rom the DRU to the re=uire po&erlevel

:ouples the output po&er "or a loopbac* test an the po&er etection

+rovies the etecte temperature o" the po&er amplier

+rovies &ieban combination an +T "unctions



Function&% structure of theDTRU



Function&% #o'es of the DTRU

R Transmit Moe Transmit inepenenc! moe +T moe

4ieban combination moe

Transmit iversit! moe



Tr&ns#it In'e$en'enc* +o'e

The t&o TR's &or* inepenentl!&ithout using the combination unit



PBT +o'e

%ne TR' in the DTRU is use. %ne route o" signals goes through moulation

an D, conversion.

,s these t&o routes o" signals are aligne inphase the output po&er is amplie a"tercombination



Wi'e&n' Co#in&tion+o'e

The t&o transceivers are combinethrough a combiner be"ore transmission.



Tr&ns#it Di"ersit* +o'e

%ne route o" baseban signals areivie into t&o routes. Thus theo&nlin* receive level o" the M$ is

improve



Function&% #o'es of the DTRU

R Receive Moe Receive 5nepenenc! Moe Receive Diversit! Moe 8-&a! Receive Diversit! Moe



Recei"e In'e$en'enc*+o'e

Each TR' o" the DTRU uses the main aniversit! ports o" itsel"



Recei"e Di"ersit* +o'e

Each main (iversit!) signal is ivie into t&oroutes through a ivier an then sent to themain6iversit! port o" the t&o TR's. ?ote onl!t&o channels o" R signals are route into the

DTRU through the R cables



,-.&* Recei"e Di"ersit*+o'e

our routes o" signals are sent to one TR'. The 8-&a! receive iversit! helps achieve more uplin*

gain than the main receive iversit! oes. ?ote in the 8-&a! receive iversit! moe onl! one TR'

can be use in the DTRU



DTRU P&ne%



S$ecic&tions of the DTRU

Table / $pecications "or the DTRU (t!pe ,)

5tem $pecications

$i3e $i3e o" the "ront panel (length 2&ith) >1@.< mm 2 A1./ mm

4or*ing voltage 81 9 po&er input

+o&er consumption (heatconsumption)

Ma2imum po&er consumption&ith 81 9 D: input 8B0 4

Ma2imum po&er consumption&ith ;<7 9 D: input >@0 4

4eight @.< *g



DAFU sur&ck

The D,U subrac* can be congure &iththe DD+U

D:%M



Functions of the DDPU

This escribes the "unctions o" the DD+U. The DD+U per"orms the "ollo&ing "unctions +rovies lightning protection through the ,?T port Detect 9$4R alarms in the antenna s!stem :ontrol the gains "or the receive lo& noise

amplier Transmits multiple routes o" R signals "rom the

transmitter to the antenna Receives signals "rom the antenna amplies an

=uarters these signals an then transmits them tothe receiver o" the DTRU



Workin Princi$%es of the DDPU



Functions of the DC/+

The D:%M combines t&o routes o" T'signals "rom the DTRU an then sensthem to the DD+U.



Workin !n"iron#ent of theDC/+



Assin#ent

, site is to be congure &hich serves (a) @<users &ho are present is parliament house. Couhave to ma*e three sectors. Tell b! s*etchingho& man! DTRU cars D:%M cars an

,ntenna can be use. ,lso sho& connections

(b) /@< users (c) /88 users

Urban (a6b6c) Rural (a6b6c)

double-transceiver unit (dtru)

Documents