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Antenna Information
The Skymetry WTU-14 comes with a unity-gain stub antenna
designed specifically for the frequency range required. In order
to comply with FCC RF exposure, the external antenna must be
mounted in a location where people will never come within 20cm of
the antenna. The gain of the antenna may not exceed 0dBi. For opti-
mum antenna performance, there should be no metal objects within
close proximity of the antenna.
WARNING Do not over-tighten the antenna on the
Skymetry WTU-14; this may cause permanent dam-
age to the device.
The antenna must be connected before the device is powered up.
Connecting the Power Supply
The Skymetry WTU-14 requires a 15VDC 800mA power supply
(part number FGD-8250) to operate. This power supply will charge
an external 12V battery (2–12AH) and provide the necessary power
to transmit messages over the wireless network.
WARNING: Do not substitute supplies with lower
capacity.
Connect the positive terminal of the Power Supply to the +Vin ter-
minal on the Skymetry WTU-14.
Connect the negative terminal of the Power Supply to the -Vin ter-
minal on the Skymetry WTU-14.
Figure 3: Locking the NEMA-4x enclosure
Chapter 2: Installation
25
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