DRAKE HDE24A Gebrauchsanweisung - Seite 4

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4 Introduction, Setup, and Operation

Introduction

The Drake® HDE24A high-definition encoder generates an MPEG2 or MPEG4 H.264 video stream, with Dolby®

AC-3 or MPEG1 layer 2 audio. This module is designed to be installed into the Drake EH24A- or MEQ1000-style

chassis, which provide the control and output interfaces to the unit. The encoder accepts HDMI™ and component

inputs, and can inject closed-captioning data from a synchronized composite video source (typically provided by

the same decoder that produces the HD video stream).

Installation

This unit installs into the chassis in the same fashion as the SDE24 encoder; for chassis insertion instructions,

see the manual for your particular chassis. DO NOT INSERT THIS ENCODER WITH POWER APPLIED TO THE

CHASSIS - RESULTING DAMAGE WILL NOT BE COVERED BY THE LIMITED WARRANTY. Cable the inputs

appropriately (see the Rear Panel Connections section for details).

The HDE24A's firmware may be upgraded in the field, using a removable USB flash drive. Once you have obtained

the latest firmware version file, copy the file onto a removable flash drive. The file must not be placed in any

sub-folder of the drive. Power down the chassis, insert the flash drive into the Service port on the unit, and

apply power to the chassis. The HDE24A will automatically upgrade and then reboot. Once the unit is functioning

normally again (encoded audio and video is being generated), remove the flash drive from the unit.

Operation

Power on the chassis, and select the newly-inserted HDE24A unit via the LEFT and RIGHT buttons on the front

panel. The following configuration settings are available for the HDE24A (defaults listed in bold italics):

Video Source: Component, HDMI, Composite - sets the input video format

Resolution: Scan, 1080i, 720p, 480p, 480i - auto-scan input resolution, or force a particular video mode. Not

available for composite (composite is always 480i)

Format: MPEG2, MPEG4 H.264 - sets the video compression method used

MPEG4 Profile: Default, Simple, Advanced Simple - sets the MPEG4 video profile used (only available when

format is MPEG4 H.264)

MPEG4 Level: 0, 1, 2, 3, 4, 5 - sets the MPEG4 encoding level (only available when format is MPEG4 H.264)

Bitrate: Range varies by resolution - sets the bandwidth used by the video encoder (15.0 Mbps)

Brightness: Sets the video brightness - larger values increase brightness (128)

Contrast: Sets the video contrast -larger values increase contrast (128)

Saturation: Sets the video contrast - larger values increase saturation (128)

Hue: Adjusts the video color hue - behavior varies by input mode (128 for Composite, 0 for other inputs)

Audio Source: Analog, HDMI - select audio input source (only available when video input is HDMI)

Audio Encode: AC-3, MP2 - changes audio encode format between Dolby AC-3 and MPEG1 Layer 2.

Audio Gain: varies audio level +/- 15dB (0, only avaliable when audio input is Analog)