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Nextiva S2800e Series Programming Guide Programming the S2800e Camera • 9

The Shutter Speed menu is used to scroll through the various speed

options on the camera’s automatic shutter (default setting is automatic).

As with all electronic shutters, higher speeds reduce light sensitivity

without affecting the optical depth of field, as opposed to an iris

adjustment.

The shutter speed can be selected for auto-exposure with digital slow

shutter (DSS) or auto exposure with shutter priority. They function as

follows:

• Auto-exposure with digital slow shutter: This mode will

automatically, and continuously, adjust the shutter speed down to

its slowest setting under low light conditions. The actual selected

setting will be prefixed with an AUTO. This setting is the minimum

digital slow shutter. The operator may select the slowest setting to

prevent the digital slow shutter from operating while still maintaining

auto-exposure. DSS is not available if Image Stabilization is ON.

• Auto-exposure with shutter priority: This mode allows auto exposure

to operate under the fixed shutter settings selection. These settings

have no prefix. The following are the available speeds:

SHUTTER

TYPE

SHUTTER SPEEDS, 22XEX, 23X AND 35X CAMERAS (seconds)

DIGITAL

SLOW

SHUTTER

Auto-1/2

(Auto-1/1.5 PAL)

Auto-

1/4

Auto-

1/8

Auto-

1/15

Auto-

1/30

Auto-

1/60

SHUTTER

PRIORITY

1/2

(1/1.5 PAL)

1/4 1/8 1/15 1/30 1/60 1/120 1/180 1/250 1/500 1/1000 1/2000 1/4000 1/10000 1/30000

The Auto Gain Control sub-menu allows adjustment of Maximum AGC

Tuning Value, another sliding scale adjustment. This selects the relative

effect of the Automatic Gain Control (AGC). Higher settings increase

light sensitivity but boost noise as well.

The V Phase Adjust screen is designed to synchronize the vertical

phase of the camera (relative position in time when the camera starts to

scan the image) with other cameras in a system. When two cameras

are synchronized, there is no picture “roll” when switching from one

camera to another. This adjustment is also a sliding scale, from 0

360

. When set to 360

, the camera will be locked to an internal crystal.

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Verint NEXTIVA S2800E series Guida Utente Pagina 15

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