or other configurations. The viewing format shall also permit 2x dynamic
zoom capability, full screen. The multiplexer shall be compatible with
EIA/NTSC video cameras and standard or super VHS VCRs. External camera
synchronization shall not be required for proper operation of the video
multiplexer. Control of all functions of the multiplexer shall be provided
either by a full function keyboard or by pushbutton selection with
on-screen menu driven set-up. The multiplexer shall retain the current
program for at east 6 hours in the event of power loss.
2.12
VIDEO CASSETTE RECORDER (VCR)
VCR shall conform to EIA 170 standards. The VCR shall be specifically
designed as a time lapse recorder for use in security systems. The VCR
shall operate on 120 volts 60 Hz AC power. Resolution of the VCR in normal
play mode shall not be less than 350 horizontal lines in monochrome, 300
horizontal lines in color. Signal-to-noise ratio shall not be less than 40
dB. The VCR shall have a condensation or dew circuit. The VCR shall have
a built-in time and date generator that can be turned on or off, and shall
impose the time and date on the video during recording. A 24 hour battery
back-up shall be provided to protect time/date and programmed information.
The VCR shall have an audible warning alarm that shall annunciate the end
of tape, excessive condensation, tape transport malfunction, or tape jam.
2.12.1
Tape and Tape Transport
The video tape used in the recorder shall be contained in a cassette
mechanism, and shall not require the operator to thread the tape through
the tape transport mechanism. The tape shall load through the front of the
recorder.
2.12.2
Recording and Playback
The VCR shall be capable of recording for 168 hours or more on a single
cassette tape with at least 6 user selectable time-lapse record speeds.
The VCR shall have a contact closure alarm signal input which shall
automatically switch the recorder into standard play, record mode when an
alarm is initiated. The recorder shall reach stabilized record speed in 1
second or less. The VCR shall put a cue mark on the tape at the beginning
of an alarm event recording. The alarm event record time shall be
selectable for up to 3 minutes of automatic recording as a minimum. A
record-lock feature shall be provided which shall protect the VCR against
tampering with the tape transport controls and power control once recording
has started. Playback functions shall include: alarm search, fast forward
search, fast rewind search, rewind/fast forward, play, slow motion or step
field/frame, and pause/still.
2.12.3
Connectors for VCR
Video signal input and output shall be by BNC connectors. The recorder
shall provide connectors for alarm trigger signal input and output.
2.13
VIDEO SIGNAL EQUIPMENT
**************************************************************************
NOTE: The designer will specify the video signal
equipment needed, and eliminate the equipment not
used from the CCTV specification.
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SECTION 16751A
Page 33
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