RT-2087/ZPX-A User and Installation Guide
UAV-1005667-001 Rev A
ECCN 7A994
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•
Keep the cable lengths as short as possible and avoid sharp bends
in the cable to minimize the Voltage Standing Wave Ratio (VSWR)
(i.e., Return Loss).
•
Ensure that cable and connector losses do not reduce power output
below allowed levels for your aircraft operation.
•
Conventional monopole antennas require an appropriate ground
plane. For metallic aircraft, ensure good ground connection to the
antenna. For composite aircraft, a ground plane must be installed.
•
The antenna connections should be protected from the elements,
and antenna cabling should be installed to minimize RF energy
radiated inside the aircraft.
The antenna used must be installed to provide a separation
distance of at least 20 cm from all persons.
7.8 Static Pressure Port
ZPX-A contains a TSO-C88b altitude encoder. If used, the barb fitting (size
M3) located on the unit’s enclosure should be securely attached to the
aircraft’s static pressure system. Minimize static pressure line lengths as
much as possible. Press-plastic tubing (PVC, soft nylon, or polyurethane)
with a nominal ID of 1/8” (3.175 mm) can be used and secured with a small
tie-
wrap. Adapters may be used to convert the barb to match the aircraft’s
current static plumbing. Ensure any fittings are free from leaks.
Upon completion of installation, a case leak test should be performed per
14 CFR Part 43 Appendix E.
If an external altitude encoding source is configured (see §10.1.9), the
internal altitude encoder is unused, and the static pressure system does
not need to be connected to the ZPX-A static pressure port. The Maximum
Operating Altitude listed on the ZPX-A nameplate is not applicable when
used with an external altitude encoding source
– instead reference the
Environmental Qualification Form in Section 5.7.
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