VAL Avionics NAV 2000 Installation Guide download pdf (Page 32)

System Planning

2-10 SkyView System Installation Guide - Revision R

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.

SV-XPNDR-261/262

The SV-XPNDR-261/262 Mode S transponder module is designed to be mounted in any

convenient location in the cockpit, the cabin, or an avionics bay.

The following installation procedure should be followed, remembering to allow adequate space

for installation of cables and connectors:

 Select a position in the aircraft that is not too close to any high external heat source. (The

SV-XPNDR-261/262 is not a significant heat source itself and does not need to be kept away

from other devices for this reason).

 Avoid sharp bends and placing the cables too near to the aircraft control cables.

 Secure the mounting tray to the aircraft via the three (3) mounting holes in the tray. The

tray should be mounted to a flat surface - it is important that the tray is supported at the

dimples as well as the three mounting points.

 Put the SV-XPNDR-261/262 transponder into the secured mounting tray by hooking the

connector end under the lip on the tray.

 Lock the SV-XPNDR-261/262 transponder into the mounting tray by clipping the retaining

wire over the lugs on the opposite end.

Cooling Requirements

The SV-XPNDR-261/262 Mode S transponder meets all applicable ETSO/TSO requirements

without forced air-cooling.

Attention should however be given to the incorporation of cooling provisions to limit the

maximum operating temperature if the SV-XPNDR-261/262 is installed in close proximity to

other avionics. The reliability of equipment operating in close proximity in an avionics bay can

be degraded if adequate cooling is not provided.

SV-BAT-320

Observe the following guidelines when choosing a location for an SV-BAT-320:

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VAL Avionics NAV 2000 Installation Guide Page 32