User Manual

Chapter 2 - Installation Installing the ODU
4Motion 44 System Manual
Use only double shielded cables. Avoid using a single shielded cable even if it
complies with these requirements. The following table provides details on
maximum length for some popular double shielded cables.
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 1x1 ODUs, 2.x GHz 4x2 ODUs: 1.5 Ohm
3.x GHz 4x2 ODUs: 1 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 1x1
ODUs and 2.x GHz 4x2 ODUs
Maximum Length for 3.x GHz
4x2 ODUs
LMR-195 30 meters 20
LMR-240 60 meters 40
LMR-400 150 meters 100