YSI 6200 - Manual (Page 96)

YSI 6200 DAS USER Manual
YSI/Massachusetts 508.748.0366, Fax 508.748.2543 Page 9-4
cover the connector with a connector boot or electrical tape. Always insure that water
drops will drip away from the connector and not towards it. Periodically disconnect the
cables and check both connectors for signs of corrosion.
DCP Enclosure
The enclosure is NEMA4X rated which will withstand splashing water. Inspect the door
seal for signs of deterioration or cracking, if a cable gland is not used, plug the hole.
Clean the door seal as required, and check the enclosure for damage. The desiccant
inside the enclosure has an indicator on it to signal when it needs to be changed out.
Replace with new desiccant as required.
Grounding
Proper grounding will afford some assurance of survivability in a near-by lightning
strike. A good ground system also assures the equipment is not floating at some high
dangerous voltage potential. The grounding wire leading from the enclosure ground lug
to the ground rod must take the most direct route possible. Always use #8 or heavier
AWG copper wire. One or two AWG heavier aluminum wire is also permitted. Insure
ground connections are secure, replace ground wire or ground rod as needed.
Antennas
The antennas provided are normally tailored for the application, therefore, an antenna for
one site might be totally different from another site. One site might be quite far from the
base station and thus require a directional antenna with substantial gain. The base
station may have to cover a wide pattern of sites geographically scattered throughout a
quadrant or even throughout all four quadrants of the compass rose, thus, an Omni
antenna with gain may be required. Directional antennas provide better coverage
towards one particular point, but have more cross sectional surface which makes them
more susceptible to damage from high winds. Omni antennas are very durable with little
cross-area.
Always insure that all ground plane elements and vertical element are secure. The
connector should be protected with a coax connector boot, or by two to three wraps of
electrical tape. Directional antennas (yagy) may require some assembly. Follow the
manufacturers assembly instructions carefully. If you are not certain, call the antenna
manufacturer. The antenna once assembled and mounted, will have the elements vertical
in reference to earth, not horizontally like a TV antenna. Each element is perfectly in
line with each other and perpendicular to the antenna boom. The element with the
gamma feed, where the coax cable connector attaches, needs to point straight up.
Always lubricate the gamma feed connector threads with a little bit of silicone grease
and then wrap the connector with one or two layers of good quality electrical tape, a
slight drip loop on the cable leading away from the connector will insure that water drips
away from the connector and not towards it. Secure the RF coax cable along boom and
antenna post.
Each antenna site inspection should take into account the above mentioned. Insure that
all antenna elements, cables, and connectors look secure and undamaged. The antenna
elements, Omni or yagy should never be in contact with another antenna element,
building wall surface or tower. Above all stay away from high tension power lines.