User`s guide

2-3
Field site placement for a cellular communications product requires additional
consideration in order to obtain optimal signal strength:
• Mount the unit away from buildings and structures when possible. Buildings tend
to block the RF signal if they lie in the path between the cellular tower and the
DCM-200. Outdoor installations are preferred.
• Raise the elevation as high as practical from the ground.
• Avoid mounting the unit to the side of a metal shed or similar structure since
metal is a very effective shield against the desired RF signal. Chain link fences
are normally not a problem.
Depending on the signal strength for a given location, it may be possible to violate some
of these recommendations and still obtain good performance. This will vary from one site
to the next, just as the reception quality of a handheld cellular phone will vary.
In some cases it may not be possible to obtain acceptable cellular radio performance
using the standard internal antenna that is provided. An optional external antenna
mounting kit can be obtained that will offer higher performance, with a tradeoff of having
lost the concealment advantage. This is discussed later in this chapter
2.4 Enclosure Dimensions
CAUTION
The non-metallic enclosure of the DCM-200 product does not
provide grounding between conduit connections. Use grounding
bushings and jumper wires to achieve the necessary grounding.
Figure 2-2
Enclosure Mounting Tab (1 of 4)