Pelco C1937M-C (4/03), CC3701H-2X manual Lens Setup and Focus Procedures, Back Focus Adjustment

LENS SETUP AND FOCUS PROCEDURES

Video Drive Auto Iris Lens

Set the lens mode selector switch to AIV. Switch the ESC and AGC OFF. Refer to the lens instructions and adjust the lens for the optimum picture (video output level of 1V peak-to-peak). To focus, fully open the iris by covering the lens with a suitable neutral density (ND*) filter. If the viewed scene is 6.5 feet (2 m) away or farther, set the lens focus to infinity (far). Use the back focus adjustment ring (refer to the Back Focus Ad- justment section) and focus on the selected scene. Remove the ND filter and set the lens focus as required. Set the AGC switch to ON, as required. Most scenes benefit from AGC.

Direct Drive (DC) Auto Iris Lens

Set the lens mode selector switch to AID (default setting). Switch the ESC and AGC OFF. Use an appro- priate screwdriver to turn the lens level potentiometer (refer to Figure 1) fully clockwise. Next, slowly adjust the potentiometer counterclockwise until the optimum picture is obtained (video output level of 1V peak-to-peak). To focus, fully open the iris by covering the lens with a suitable neutral density (ND*) filter. Select the scene to be viewed. If the viewed scene is 6.5 feet (2 m) away or farther, set the lens focus to infinity (far). Use the back focus adjustment ring (refer to the Back Focus Adjustment section) and focus on the selected scene. Remove the ND filter and set the lens focus as required. When finished, switch the ESC and AGC ON.

Fixed Lens - No Iris

Set the ESC and AGC switches ON (default settings). To focus, set the lens focus to infinity and view an image greater than 6.5 feet (2 m) away. Focus the image with the back focus adjustment ring (refer to the Back Focus Adjustment section). Set the lens focus as required.

Manual Iris Lens

Set the ESC and AGC switches ON (default settings). To focus, open the iris fully and set the lens focus to infinity. View an image greater than 6.5 feet (2 m) away. Focus the image with the back focus adjust- ment ring (refer to the Back Focus Adjustment section). Adjust the lens focus, set the iris (if equipped) for the best picture quality. The largest aperture gives the best light sensitivity, the smallest aperture the greatest depth of field.

Zoom Lens

Set the lens focus to infinity (far) and fully open the iris by covering the lens with a suitable neutral density (ND*) filter. Zoom out to the widest field of vision and view a distant object. Adjust the back focus adjust- ment ring until the object is in focus (refer to the Back Focus Adjustment section). Next, zoom fully in and adjust the lens focus until the object is again focused. Repeat these steps until the full zoom range may be viewed with the minimum loss of focus.

* NOTE: For best results, outdoors, use an ND3 filter.

BACK FOCUS ADJUSTMENT

The back focus adjustment is located at the front of the camera and is accessible from either side of the case .