Functional Description; General - Dekolink Deko2119 Product Manual

D W
EKOLINK IRELESS

2. FUNCTIONAL DESCRIPTION

2.1 G
ENERAL
The Block Selective Mini-Repeater functional operation is based on a duplexed
path configuration. In each path, the signal is down-converted to an
Intermediate Frequency (IF); filtered by a Surface Acoustic Wave (SAW) filter
and up-converted back. This configuration gives sharp out of band attenuation
for improved system performance.
2.2 F
UNCTIONAL
2.2.1 Signal Path
The following process is performed in both the Uplink and Downlink paths of
the Repeater (see Figure 3).
The incoming RF signal from either the Base antenna (from the BTS) or from
the Mobile antenna (from the mobile handset) enters the Repeater through a
diplexer that enables dual-band support. The signal is filtered by the Duplexer,
followed by an Automatic Gain Control (AGC) amplifier (AMP). The signal is
then down-converted to an Intermediate Frequency (IF).
Figure 3: Mini-Repeater - Block Diagram
The IF signal is further filtered by a Surface Acoustic Wave (SAW) filter. The
Mini-Repeater includes three selectable SAW filters. However, a single filter
can be activated at any time. The IF signal is then converted back to RF signal
by the Up-Converter. This processing path provides sharp out-of-band
attenuation that improves the isolation between the receiving and transmitting
paths.
Pub. 313-2006 Rev. 2.01S
L . M -R
TD INI
D
ESCRIPTION
D 2119
EPEATER EKO
Proprietary Data
P M
RODUCT ANUAL
Page 7