Boltek StormTracker-PCI - Manual (Page 17)

TROUBLESHOOTING 13
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