ashtech HDS800, Reference Manual

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206
Integrating HDS800 into Your Application
Depending on your answers to these questions, you will
orientate the receiver accordingly, making sure you can
easily access the panel you need to use most.
NOTE: With the receiver installed on-board a vehicle, if a
cellular connection is used, you may need, for best
coverage, to use an external cellular antenna rather than
the one that can be screwed directly to the front panel of
the receiver. In this case, you will have to use a coaxial
cable to connect this antenna to the receiver. Again, the
type and length of coaxial cable used may significantly
impact the performance level of the cellular link. Follow
the usual recommendations to preserve a sufficient level
of radio-frequency signal at the antenna, both in reception
and transmission.
• When used on the bridge for example, the receiver can
also be mounted horizontally on a cradle (not provided), a
rack or a shelf, either from the bottom of the case, as
explained previously, or from the two lateral panels if you
want to create free space underneath the receiver (for
running cables, etc.).
Mounting the receiver on a cradle, rack or shelf makes
sense when the user regularly needs to read the display
screen, press the three buttons on the front panel or use
the USB port. This mounting configuration will usually be
more interesting in marine surveying than in machine
guidance.
When fixing the receiver from its two lateral panels, you
need to prepare the two vertical support planes, drilling
two holes dia. 4.2 mm (minimum) in each of them. The
drilling plan should be designed taking into account the
dimensions of the two lateral panels, as illustrated below.