Table 2-1: If Cables Requirements; Table 2-2: Maximum If Cable Length (Double Shielded Cables) - Alvarion BreezeMAX 3500 System Manual

2.1.3 IF Cables
The AU-ODU is connected to the AU-IDU/Micro Base Station via an IF cable
carrying both signals and power. The maximum permitted attenuation of the IF
cable at applicable frequencies, its screening effectiveness and its maximum
permitted DC resistance (the sum of the DC resistance of the inner and outer
con ductors) are provided in Table 2-1.
Item
Screening Effectiveness
IF cabl e Impe dance
Maxim um IF cable Attenuation
Maximum IF cable DC Resistance
Maximum IF cable Return Loss
To comply with the required screening effectiveness requirement, it is
recom mended to use double shielded cables. Table 2-2 provides details on
maximum length for some popular cables.

Table 2-2: Maximum IF Cable Length (Double Shielded Cables)

Cable
LMR-195
LMR-240
BreezeMAX System Manual

Table 2-1: IF Cables Requirements

Description
90 dB minimum in the 10-300 MHz band.
50 ohm
19 dB @ 240 MHz
15 dB @ 140 MHz
8 dB @ 64 MHz
4.0 ohm
20 dB in the 10-300 MHz band
Maximum Length
80 m eters
150 meters
Installing the ODU
35