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10 • Programming Menus XX134-44-02 Rev 710 SurveyorVFT Camera Dome Programming

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 automatically, and

continuously, adjusts 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

to 360

. When set to 360

, the camera will be locked to an

internal crystal (default).

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