DRAKE SDI24A, Инструкция по эксплуатации, Страница: 4 / 8

4 Introduction / Setup / Operation
Introduction
the Drake® SDi24A high-definition encoder
generates an mPeG2 or mPeG4 H.264 video
stream, with Dolby® Digital or mPeG1 layer 2
audio. this module is designed to be installed
into the Drake eH24 chassis, which provides
the control and output interfaces to the unit. the
encoder accepts SD-SDi and HD-SDi inputs with
embedded PCm audio or separate analog audio.
Installation
this unit installs into the chassis in the same
fashion as the SDe24 and HDe24 encoders; for
chassis insertion instructions, see the manual
for your 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).
Upgrading Firmware
the SDi24A'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 SDi24A 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 SDi24A unit via the Left and RiGHt
buttons on the front panel. the following
configuration settings are available for the SDi24A
(defaults listed in bold italics):
Resolution: Scan,1080i@30Hz, 720p@60Hz,
720p@50Hz, 576i, 480i - auto-scan input
resolution, or a force particular video mode. in
normal operation, this should be set to Scan.
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)
Video Rate: Range varies by resolution - sets the
bandwidth used by the video encoder (15.0 Mbps)
Audio Source: Embedded, Analog - select audio
input source
Audio Encode: Digital, MP2 - changes audio
encode format between Dolby® Digital and
mPeG1 Layer 2
Audio Rate: 320kbps, 384kbps, 128kbps,
192kbps - sets the bandwidth used by the audio
encoder
NOTES:
1. if the front panel display shows invalid
vIDEO, the incoming video is not correct
(either no video is present, or the resolution
settings are incorrect).
2. this encoder will only support the specific
video resolutions outlined in the Specifications
table.
3. firmware updates may be required for
eH24 chassis. eH24's must be updated to
v3.0 or later.
Dolby and the double-D symbol are registered
trademarks of Dolby Laboratories.