600840-000037 Stratus ESG Installation Instructions (Experimental)
Rev. 1.2
Last Revised: May 9, 2016
Page 17 of 52
Keep the antenna away from any protruding metal such as engines, propellers, other antenna
masts, landing gear (and/or doors), and access doors; breaks in the antenna's ground plane; or
anything that can affect the radiation pattern. If mounted on a composite aircraft, a conductive
ground plane should be added to the aircraft in order for the radiation pattern of the antenna to
be maximized.
NOTE
: A determination should be made whether the current cabling is acceptable for the
installation. Using RG400, the maximum cable length is 14 feet with a maximum of 2 dB loss. If
the installation requires more length, select other 50 ohm coax that will not exceed the
maximum of 2 dB loss.
Altitude encoders
Stratus ESG requires input from an independent altitude encoder. Stratus ESG will connect to
an encoder that has a Gillham (gray code) connection or a serial altitude encoder output on a
RS232 port. The altitude encoder must meet the performance requirements of TSO-C88 (a
or b). Serial altitude encoders must be Trimble/Garmin or Shadin/RMS altitude encoders.
The altitude encoder should be installed using the altitude encoder manufacturer’s instructions.
NOTE:
The altitude encoder might have a longer power up time than Stratus ESG. While the
altitude encoder powers up, the altitude field will be replaced by dashes. If the altitude encoder
has not powered up within five minutes, an error message will appear. Once the attitude
encoder is completely powered on and transmitting data, the error message will disappear.
2. Installing Stratus ESG
2.1.
Limitations for installation
The following limitations should be taken into consideration when installing Stratus ESG.
Aircraft
Stratus ESG may not be acceptable for installation on all aircraft makes and models.
Cooling air
Stratus ESG does not have an air cooling duct. Do not install Stratus ESG near a heat source.
An alternate method of cooling is required if the unit must be installed near a heat source.
GPS
Stratus ESG cannot be used as a GPS position source for navigation for LNAV approaches
outside of SBAS coverage.
2.2.
Backplate and rack installation
Refer to the installation drawings and wiring diagrams in Appendix A to assemble the mounting
rack with the hardware specified in Table 6. Mount the rack to the aircraft using the six holes on
the side of the rack with the hardware specified in Table 7.
Refer to Section 1.3 for dimensions and weight information.