matrix. That is, the number of cameras that are to
be switched to the number of monitors in the CCTV
console. The designer should also calculate the
percentage of system expansion for future needs, and
determine if 10 percent is adequate.
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The switcher shall be a programmable crosspoint switcher capable of
switching any video input to any video output. The switcher to be
installed at the site shall be configured to switch [_____] cameras to
[_____] monitors, and shall have an expansion capability of not less than
[10] [_____] percent.
2.10.3
Switcher Modular Expansion
The switcher shall be expandable in minimum increments as specified below.
2.10.3.1
Input Module
Hardware expansion modules shall be provided to expand the switcher matrix
configuration in increments of at least 8 camera inputs.
2.10.3.2
Output Module
Hardware expansion modules shall be provided to expand the switcher matrix
configuration in increments of at least 4 video outputs.
2.10.4
Alarm Interface
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NOTE: The designer will determine the number of
alarm inputs needed for the alarm interface. The
designer should calculate the percentage of
expansion for future needs, and determine if 10
percent is adequate.
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An alarm interface shall be furnished with the switcher. The interface
shall be compatible with the ESS alarm annunciation system. The alarm
interface shall monitor alarm closures for processing by the switcher CPU.
Alarm inputs to the alarm interface shall be relay contact or through an
EIA ANSI/EIA/TIA-232-F interface. The alarm interface shall be modular and
shall allow for system expansion. The alarm interface to be installed at
the site shall be configured to handle [_____] alarm points, and shall have
an expansion capability of not less than [10] [_____] percent. An output
shall be provided to actuate a video recorder.
2.10.5
Switcher Response Time and Alarm Processing
The switcher response time shall not be greater than 200 milliseconds from
the time the alarm is sensed at the switcher alarm interface, until the
picture is displayed on the monitor. The switcher shall continue to
process subsequent alarms and shall put them in a queue. The operator
shall be able to view the alarms in queue by operating an alarm release
function which switches the subsequent alarms to the monitor in the order
of occurrence.
SECTION 16751A
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