VAL Avionics NAV 2000 Guide d'installation télécharger pdf (Page 184)

SV-GPS-250 Installation and Configuration

8-2 SkyView System Installation Guide - Revision R

Physical Installation

For most reliable performance, the SV-GPS-250 (like all GPS devices) requires a

clear, unobstructed view of the sky. The SV-GPS-250 is designed to be mounted on

the upper fuselage of the aircraft for an unobstructed (360° view) of the sky during

maneuvers. If the SV-GPS-250 is mounted inside the fuselage (for example, on the

top of the panel), the SV-GPS-250’s view of the sky is partially obstructed, and GPS

performance may be marginal in situations such as insufficient number of

satellites “in view” through the windscreen.

If you are concerned with possible performance issues with the intended

installation location, temporarily install the SV-GPS-250 and verify GPS

functionality - SETUP MENU > LOCAL DISPLAY SETUP > GPS FIX STATUS. Note

SATELLITES IN USE – the more satellites that are in use, the more accurate the GPS

fix can be. Note FIX QUALITY – should be 3D FIX.

The diagram below shows the mounting dimensions of the GPS module. Note that it utilizes a

common bolt pattern found in much of general aviation.

Figure 54–SV-GPS-250 Mounting Dimensions

Mounting hardware is not included. The SV-GPS-250 is designed to work with #8 fasteners with

100 degree countersunk heads. The use of nut plates is recommended for convenience, but

other hardware can be used if space allows. Specific hardware selection is determined by the

installer.

We recommend you use weather sealant around the fastener heads to keep moisture from

entering the aircraft through the mounting holes. The module itself is sealed and includes a

rubber gasket that seals the inner wire hole. It also allows the module to be mounted on slightly

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VAL Avionics NAV 2000 Guide d'installation Page 184