American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 120)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-115 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

 The camera shall provide a usable video signal (as defined below) over the

entire specified range with a scene illumination as low as 1.0 foot-candle.

The camera shall detect and render 10 shades of gray from the EIA TV

resolution chart with 5 fc illumination.

 Minimum Ambient Illumination: One foot candle when emergency lighting is

activated.

 The signal-to-noise ratio over the entire system length shall be no less than

44 dB dB (for analog portion of the system, if used).

 The cameras could use cat5 or structured cabling or possibly fiber optic

cable where needed and cost justified. CCTV systems shall be configured in

a hub and spoke arrangement with local recording being undertaken and

compressed images then being transmitted back to the ROC via a CTS or

possibly wireless network.

B. Cameras

 Elevator Camera shall be Vandal resistant, IP66 (ingress protection) rated

and corner mount color CCD type that gives full coverage and field of view of

the cab interior and elevator entrance.

 Elevator camera housing shall be constructed of stainless steel with polished

stainless steel finish.

 It shall be suitable for surface/corner mounting in an elevator cab.

 The PTZ cameras shall have smoked glass.

 The PTZ cameras shall not have make or model number visible on the

camera housing.

 Cameras shall be compatible with the picture characteristics and shall, in

addition:

- Be all solid-state

- Produce a picture with no geometric distortion

- Signal-to-noise ratio shall be at least 48 dB (for analog portion of the

system, if used)

- The line loss between each camera and the multiplexer or recorder that

the camera is connected to shall not cause the signal to noise ratio fall

below 45dB.

- Video output shall be a composite video signal with 1.0 V peak to peak

(negative synch) at 75 ohms for analog cameras.

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 120