User Manual

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance 800 MHz Indoor Coverage Solution

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ADCP-75-110 • Issue B • March 2001

Page 2

©

2001,

ADC

Telecommunications,

Inc.

DRU

DRU

DRU

DRU

DRU

DRU

DRU

DRU

DRU

DRU

DRU

DEU

DEU

DHU

RIU

LIU

REMOTE

BTS

LOCAL

BTS

RF

Fig 1C-A

RF

Figure 1. System Overview Functional Block Diagram

1.1.3 Interface With Cellular Phones

The

DRUs

interface

with

the

cellular

phones.

In

the

reverse

path,

the

DRU

receives

RF

signals

from

each

cellular

phone.

The

DRU

digitizes

the

RF

signals

and

then

converts

them

to

digital

optical

signals

for

transport

to

the

DHU.

In

the

forward

path,

the

DRU

receives

digital

optical

signals

from

the

DHU.

The

DRU

converts

the

optical

signals

back

to

the

original

RF

signal

format

for

transmission

to

the

cellular

phones.

A

small

antenna

is

connected

to

the

DRU

to

transmit

and

receive

RF

signals

from

the

cellular

phones.