DRAKE EH24 Manual de Instruções descarregar pdf (Página 7)

Features

EH24A Features

The EH24A encoder host platform is a 19” rack mountable chassis that is 2 RU tall and can accept up to six modules that are

inserted into slots via the rear panel.

SD Encoding: The SDE24 is the SD dual encoder module. Up to six of these modules could be installed in the EH24A.

Programs can be encoded in MPEG2 or MPEG4/H.264 (AVC). Audio is encoded using a choice of Dolby Digital encoding or

MPEG1, layer 2 (MP2)encoding.

EAS Message Encoding: If EAS is to be utilized, then up to 10 SD MPEG2 programs or 5 SD H.264 programs, or a mix, may

be encoded in each EH24A in addition to an EAS message program that is encoded in slot 6 of just one ‘master’ EH24A. One

SDE24EAS is required per headend to be installed in the ‘master’ EH24A. Additional ‘slave’ EH24As can be included via simple

ASI looping through each EH24A using an ASII card in slot 6 of all slave EH24As. The EH24A supports the emergency alert

system in two ways. SCTE18 table support is provided and also substitution of normal program video with EAS program

video, on all EH24A encoded program PIDs, is provided. Either method or both may be operator selected.

Program Filtering and Multiplexing: The EH24A contains transport stream multiplexers that can multiplex any or all of the

program streams from the encoders. The user may select what programs from the encoders to include in the QAM output

channel and also the user can select, independent of the QAM output, what programs to output via the DVB-ASI port. The

QAM RF output can be specified for either off-air or CATV frequency plans in the 54 to 1002 MHz spectrum. The EH24A and

installed encoder modules are powered by a built in power supply.

DTA Data Support: One input slot in an EH24A can be used to input low speed data via ASI that may be used by system

DTAs (Digital Transport Adapters). A Drake created PC program can be used to generate the data that would be then input

to the EH24A. This data generates a transport stream to provide a channel map (SCTE65 tables) for the DTAs. Also, firmware

update data can be sent to the DTAs if needed.

ASII: The Drake model ASII input module is supported to provide an ASI input for slave EAS operation and for DTA

data input as described in previous paragraphs.

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DRAKE EH24 Manual de Instruções Página 7