A P P E N D I X C – M A K I N G A N T E N N A C A B L E
19
Making an Antenna Cable
The LD-250 uses standard Category 5 (Cat5) 10baseT network cable for the
antenna cable. You can purchase a replacement antenna cable from any computer
store selling network hardware. Antenna cables may be up to 200 feet long.
If you have access to a crimper for RJ-45 connectors and a source of RJ-45
connectors and Category 5 network cable you can make your own custom antenna
cable. Making your own cable means you are able to pull the cable through
conduits, walls, etc. before you attach the connectors. This lets you drill smaller
holes for the cable and protects the connectors from damage during installation.
If you make your own antenna cable you must ensure that the wire pairing is done
correctly. The connectors must not only be wired straight through (non-reversing),
but the twisted pairs must be located in the correct positions. If the pairing is not
done correctly there will be crosstalk between the different signals on the cable
and your unit will not work properly. The correct pair locations are:
Wire position
12345678
Pair
33211244
What this means is: one pair is in the center (positions 4&5), another pair is split
and surrounds the first (positions 3&6), another pair is on the left (positions 1&2)
and another pair is on the right (positions 7&8).
Appendix
B
