Alvarion Technologies Ltd. BMAX-BA36 Manuale Utente
34
Installation
Chapter 2 - Installation Guidelines
maximum permitted DC resistance (the sum of the DC resistance of the inner and
outer conductors) are provided in the following table.
outer conductors) are provided in the following table.
To comply with the required screening effectiveness requirement, it is
recommended to use double shielded cables. The following table provides details
on maximum length for some popular cables.
recommended to use double shielded cables. The following table provides details
on maximum length for some popular cables.
2.1.4
Pole Mounting the ODU
The ODU can be mounted on a 1" to 4" pole using one of the following options:
Special clamps and threaded rods are supplied with each unit. There are two
pairs of threaded holes on the back of the unit, enabling to use the clamps for
mounting the unit on diverse pole diameters.
pairs of threaded holes on the back of the unit, enabling to use the clamps for
mounting the unit on diverse pole diameters.
The protrusions with grooves on the top backsides of the unit, and the
protrusion on the bottom backside, enable the use of 9/16" wide metal bands
(not included with the package) to secure the unit to a pole.
protrusion on the bottom backside, enable the use of 9/16" wide metal bands
(not included with the package) to secure the unit to a pole.
Table 2-1: IF Cables Requirements
Item
Description
Screening Effectiveness
90 dB minimum in the 10-300 MHz band.
IF cable Impedance
50 Ohm
Maximum IF cable Attenuation
10 dB @ 240 MHz
7.5 dB @ 140 MHz
8 dB @ 64 MHz
Maximum IF cable DC Resistance
1.5 Ohm
Maximum IF cable Return Loss
20 dB in the 10-300 MHz band
Table 2-2: Maximum IF Cable Length (Double Shielded Cables)
Cable
Maximum Length for AU-ODU-HP
LMR-195
30 meters
LMR-240
60 meters
LMR-400
150 meters