User Manual

MicroMAX Hardware Installation User Guide 
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Page 97 Commercial in Confidence UWB-D00068 Rev J
To connect the GPS antenna to the BSDU:
1. Connect the 12-pin female connector, at one end of the cable, to the 12-pin receptacle
located on the underside of the GPS.
2. Connect the 15-pin D-type male connector, at the other end of the cable, to the 15-pin D-
type port labeled GPS located on the rear panel of the BSDU.
Figure90‐GPS‐to‐BSDUcableconnection
Note:
• When installing the cable, secure the cable to the mounting
pole or bracket with a cable tie to hold the weight of the cable
(i.e. cable strain relief).
• A loop should be left in the dressed cable for maintenance
purposes and to prevent the cable weight being taken
directly on the connector itself.
• Ensure that the connector is waterproof.
18.1.2 GPS Alignment
Many GPS reception problems can be reduced, to some degree, by careful antenna site
selection.
¾ Place the GPS so that unobstructed line-of-sight reception is possible from horizon to
horizon and at all bearings and elevation angles from the antenna. This is the ideal
situation, which may not be possible under actual operating conditions.
¾ Try to place the GPS as far as possible from reflective objects, especially reflective
objects that are above its radiation pattern horizon. Close-in reflections cause strong
multipath signals.
¾ Care should also be taken to avoid coiling the GPS cable around the mounting base and
pinching the cable in windows or doors.