Drake EH24A/EH24A ASI - Manual (Page 16)

16 Setup and Programming (continued)
EAS MODE
: EAS Control is provided by 1 of 2 methods:
Method 1: - By using the new SDE24EAS module. This module has only a single composite input instead of the 2 inputs
of a standard SDE24/SDE24A. It is fed by an external EAS Controller source, that then is encoded by both encoders in the
modified SDE24/SDE24A. When EAS is activated, the transport stream generated by the SDE24EAS is routed internally
in the EH24A and replaces the transport streams coming from the other plugged in SDE24/SDE24A's. This way all
MPEG programs coming out of the EH24A have the EAS video and audio on them. Note that when using this method
only 1 SDE24EAS is required per headend, and is placed into the Module 6 slot of the Master EH24A.
Method 2: By using the newer digital standard for EAS (known as SCTE 18). In this mode, rather than each MPEG
program being replaced by the EAS video, instead when the EAS is activated, a table is inserted into the transport
stream. This table tells any SCTE 18 capable unit which RF channel to switch to and which MPEG program number
to begin decoding. The receiving unit then switches to that program to display the EAS video and audio. When the
EAS is deactivated, the receiving unit returns to its original channel.
The EAS MODE menu allows the user to select which EAS mode is desired. The choices are DISABLED, MODULE
6, SCTE 18, and MODULE 6 + SCTE 18.
EAS RF CHANNEL:
This menu allows the user to determine on which RF channel EAS information will be
outputted. Note that this menu will only appear if DTA/EAS is set to MASTER and EAS MODE is set to enable
SCTE18. The choices are 2 through 158.
EAS MODULATION:
Note that this menu will only appear if DTA/EAS is set to MASTER and EAS MODE is set to
enable SCTE18. This menu allows the user to determine the type of modulation to be used for the EAS information.
The choices are QAM64B or QAM256B.
EAS MPEG PROGRAM #:
Note that this menu will only appear if DTA/EAS is set to MASTER and EAS MODE
is set to enable SCTE18. This menu allows the user to determine on which MPEG program number the EAS
information will appear. The choices are 1 thru 65535.
EAS MAJOR CHANNEL:
Note that this menu will only appear if DTA/EAS is set to MASTER and EAS MODE is
set to enable SCTE18. This menu allows the user to select on which major channel the EAS information will appear.
The choices are 1 through 999.
EAS MINOR CHANNEL:
Note that this menu will only appear if DTA/ EAS is set to MASTER and EAS MODE
is set to enable SCTE18. This menu allows the user to determine the minor channel number on which the EAS
information will appear. The choices are through 999.
ENCODER 1 THRU 12:
These menu items provide the means for selecting the desired output mode of operation
for each of the installed encoders. The available settings are DISABLED, QAM + ASI, ASI, and QAM.
QAM MGT/VCT:
This menu item provides a means for the user to select either CVCT or TVCT tables or DISABLED
for QAM operation. TVCT is the typical setting.
QAM MAJOR CHANNEL:
The user may use this menu entry to define the QAM major channel number. The
choices are OUTPUT CHANNEL or USER DEFINED using an external PC with Drake Digital Headend Remote
Control Software.
ASI MGT/VCT:
This menu item provides a means for the user to select either CVCT or TVCT tables or DISABLED
for ASI operation.
ASI MAJOR CHANNEL:
The user may use this menu entry to define the ASI major channel number. The choices
are OUTPUT CHANNEL or USER DEFINED using an external PC with Drake Digital Headend Remote Control
Software.
QAM MODE:
This menu allows the user to set the modulation type for the output. Choices range from QAM-
16A through QAM-1024B. 'A' suffixes indicate DVB compliant FEC and the B suffixes indicate DigiCipher II FEC
encoding. Note that the output QAM mode usually must be QAM-256. For CATV systems using DigiCipher II,
select the QAM-256B mode. For DISH Network QAM distribution or other DVB systems using DVB set tops,
choose the QAM-256A mode.