User's Manual

Installing the ODU
4Motion System Manual 43
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 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 ODU
LMR-195 30 meters
LMR-240 60 meters
LMR-400 150 meters