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Chapter 2 - Installation Guidelines
cable at applicable frequencies, its screening effectiveness and its maximum
permitted DC resistance (the sum of the DC resistance of the inner and outer
conductors) are provided in
Item
Screening Effectiveness
IF cable Impedance
Maximum IF cable Attenuation
Maximum IF cable DC Resistance
Maximum IF cable Return Loss
To comply with the required screening effectiveness requirement, it is
recommended to use double shielded cables.
maximum length for some popular cables.
Table 2-3: Maximum IF Cable Length (Double Shielded Cables)
Cable
LMR-195
LMR-240
LMR-400
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.
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.
NOTE
Install the unit with the bottom panel, which includes the LEDs, facing downward.
26
Table
Table 2-2: IF Cables Requirements
Description
90 dB minimum in the 10-300 MHz band.
50 ohm
AU-ODU: 19 dB @ 240 MHz, 15 dB @ 140 MHz, 8 dB @ 64 MHz
AU-ODU-HP: 19 dB @ 240 MHz, 15 dB @ 140 MHz, 8 dB @ 64 MHz
AU-ODU:4.0 ohm
AU-ODU-HP: 1.5 ohm
20 dB in the 10-300 MHz band
Maximum Length for AU-ODU
80 meters
150 meters
250 meters
2-2.
Table 2-3
Maximum Length for AU-ODU-HP
30 meters
60 meters
150 meters
provides details on
Installation
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