iDirect Evolution X3 Satellite Router Installation and Safety Manual 21Preparing the Coax Cables4.7 Preparing the Coax CablesUse high quality coaxial cable to connect the iDirect Evolution X3 Satellite Router to the ODUequipment. iDirect recommends that you use a solid copper center conductor, quad shield,coaxial cable with a minimum of 60% + 40% braid and double foil shield to connect the IDU tothe ODU equipment, such as:• RG-6 — 0.04 inch (1 mm), solid bare copper center conductor (CommScope 5782)• RG-11 — 0.064 inch (1.6 mm), solid bare copper center conductor (5902)The center conductor must be straight and extend 1/8 inch (3.2 mm) beyond the end of the F-connector, and the connector should be securely crimped to the cable.Note: iDirect does not recommend using RG-59 with solid bare copper centerconductor unless the IFL length is less than 120 feet (37 m). If lower RFinsertion loss is required due to the distant between the IDU chassis and theODU equipment, then RG-11 or other 75-ohm types of coax can be used.If you use different types of coaxial cable other than the recommended quad shield RG-6 orRG-11, the following problems can occur:• Co-channel Interference – If signals at the same frequency are carried on long, parallelruns of coaxial cable (for example, in cable trays, or riser) interference can occurbetween the signals. Higher quality cable helps to prevent this with better shielding. Co-channel interference causes degradation and higher packet loss rate.• Damage to the Evolution X3 router connectors – The chassis connectors are designed forRG-6 or RG-11 cable and connectors. Larger cables can damage the connectors.• Good return loss – High quality cable and correct connectors help ensure an optimalreturn loss of 10 dB or more.Excessive DC Resistance – Will result in excessive voltage drop across the IFL cable. Hence,the voltage at the BUC may be too low to operate properly.