Antenna Installation Site - Considerations; Connection To Antennas And To Power - Dekolink DEKO2408 Product Manual

D W
EKOLINK IRELESS
4.6 A I
NTENNA NSTALLATION
4.6.1 Base/Donor Antenna Installation Site Selection
The Base/Donor antenna installation is usually a directional antenna such as a
Yagi or Panel antenna with 8 to 13 dB gain.
Point the antenna to the base station to receive maximum input power. Make
sure the antenna is in line of sight with the base site. You can raise the antenna
higher if necessary.
4.6.2 Remote/Mobile Antenna Installation Site Selection
Before installing the Remote/Mobile antenna, see the FCC regulations for
information regarding recommended distances between the antennas and
The Remote/Mobile antenna is connected to the Mini Repeater mobile port.
This type of antenna is usually omni directional (isotropic), or wide beam, with
0 to 2 dBi typical gain. This type of antenna is usually installed to distribute
signals indoors (in buildings, tunnels, basements, parking lots, shopping
centers, etc.). A Distributed Antenna System (DAS) is frequently used.
4.6.3 Antenna Isolation
For proper Repeater operation, Dekolink recommends that the isolation
between the Base/Donor and the Mobile/Service antennas be 8 dB, in contrast
with the 15 dB isolation required by conventional repeaters. Lower isolation
can lead to high in-band ripple, oscillations and low Signal Quality.
However, in case of poor isolation, the Smart ALC (SALC) comes into
operation, and ensures no-oscillation operation of the High selectivity Mini
Repeater. Whenever the isolation drops, the Repeater automatically reduces the
gain to keep away from oscillations. Once the isolation problems are solved, the
Repeater automatically raises the gain anew.
To measure the isolation, inject a known signal into one antenna and measure
the coupled output from the opposite antenna. Perform this procedure across
the frequency range of both Uplink and Downlink bands.
4.7 C
ONNECTION TO
Perform the following connection procedures (see Figure 4 for connectors'
location):
1. Connect the Donor antenna cable to the BASE connector
2. Connect the Service antenna cable to the MOBILE
connector
3. Verify that the DC power supply unit cable is connected to
the POWER connector.
The DC power supply unit is located at the top of the unit, behind the front
Pub. 308-2005 Rev. 2.00S
L . M R
TD INI EPEATER
S - C
ITE
population centers. Refer to paragraph 5.4.
A
NTENNAS AND TO
panel (see Figure 1).
D 2408-09
EKO
ONSIDERATIONS
Note
P
OWER
Note
Proprietary Data
P M
RODUCT ANUAL
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