Boltek LD-350 - Manual (Page 21)

16
Making an Antenna Cable
The LD-350 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