VAL Avionics NAV 2000 Guía de instalación descargar pdf (Pagina 82)

SV-D700 / SV-D1000 / SV-D1000T Installation and Configuration

4-22 SkyView System Installation Guide - Revision R

USB Usage and Accessibility

It is useful to have the USB socket on the display’s wire harness accessible after

installation for file uploads and downloads.

The USB connector is used during the following operations:

 System firmware updates

 Configuration file uploads and downloads

 Database updates

External Dim Control Connections

DIM INPUT (Pin 25) The backlight level on a SkyView display can be increased or decreased

using a control signal of 0 to 36 volts DC. See External Brightness Management to configure

brightness levels for specific voltages.

DIM OUTPUT (Pin 26) The DIM OUTPUT signal is an approx. 120 Hz (may change in future

firmware revisions) Pulse Width Modulation (PWM) signal directly proportional to the screen

brightness – 100% to 0.02%. This output is designed to directly control the dim level of devices

such as LEDs; a common use is for the back-lighting of switches in a panel so that they dim at

night in conjunction with SkyView’s automatic dim levels.

The DIM OUTPUT signal is an open collector to ground - it acts as a switch to ground, and does

not source any power itself. Pin 26 can sink a maximum current of 120mA and a maximum

voltage of 40V. The DIM OUTPUT signal is not analog and cannot be used to control the dim

level of devices that expect 0-5V, 0-12V, or a resistance as their dimming input.

Do not connect the DIM OUTPUT signal from multiple SkyView screens in parallel. The DIM

OUTPUT signals from each display is not synchronous, and this will lead to inconsistent

behavior.

Audio Output Electrical Connections

Dynon recommends that SkyView’s audio outputs be connected to an unmuted

input on your audio panel or intercom. When connected this way, critical audio

alerts generated by SkyView are not muted by ATC transmissions or other audio

events that could cause SkyView’s audio to be suppressed if it were connected to

a muting input.

SkyView’s audio output cannot be connected in parallel with a radio to a headset.

Doing so will significantly reduce the volume of the radio output, possibly to the

level that it is not usable. An intercom such as the SV-INTERCOM-2S, audio mixer,

or audio panel is required to utilize this output.

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VAL Avionics NAV 2000 Guía de instalación Pagina 82