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 .

To adjust the back focus:

1.	Loosen the two back focus lock-
	ing screws (one on each side).
2.	Turn the back focus ring until the
	object is in focus.
3.	When the back focus adjustment
	is satisfactory, tighten the locking
	screws. Do not over tighten the
	locking screw or force the back

BACK FOCUS ADJUSTMENT RING

COUNTERCLOCKWISE

BACK FOCUS

ADJUSTMENT

LOCKING SCREW

CLOCKWISE

focus adjustment ring.

Figure 5. Back Focus Adjustment

Pelco Manual C1937M-C (4/03)

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CC3701H-2X, C1937M-C (4/03) specifications

The Pelco C1937M-C (4/03) is a robust and versatile video surveillance camera that has become popular in various security applications. Known for its high-quality imaging and reliable performance, the CC3701H-2X model comes equipped with several advanced features and technologies that enhance its usability and effectiveness in diverse environments.

One of the standout features of the Pelco C1937M-C is its high-resolution imaging capabilities. It provides clear and detailed video output, ensuring that critical details are visible even in challenging lighting conditions. This capability is essential for applications where facial recognition or license plate identification is required, making it an ideal choice for security professionals.

The CC3701H-2X incorporates advanced image processing technology that enables it to perform well in both low-light and high-contrast situations. With a wide dynamic range (WDR), this camera can capture clear images in scenes that have both bright and dark areas, significantly reducing issues related to glare and shadows. The addition of infrared (IR) capabilities allows for night vision, ensuring that surveillance can continue around the clock.

Durability is another characteristic that sets the Pelco C1937M-C apart. This camera is designed to withstand harsh environmental conditions, making it suitable for outdoor installations. With an IP-rated housing, it offers protection against dust and moisture, ensuring long-term functionality without the need for frequent maintenance or replacement.

Moreover, the CC3701H-2X leverages Power over Ethernet (PoE) technology, which simplifies installation by allowing the camera to receive both power and data through a single cable. This not only reduces the complexity of the installation process but also enhances flexibility in camera placement, as it can be installed in locations where power outlets may not be readily available.

Integration with existing security systems is made easy with the Pelco C1937M-C camera, as it supports various communication protocols. This ensures compatibility with a wide range of video management systems (VMS), facilitating seamless operation in multi-camera setups.

In conclusion, the Pelco C1937M-C (4/03) and CC3701H-2X model stand out as a reliable choice for security applications, offering high-resolution imaging, advanced low-light performance, rugged durability, and easy installation through PoE technology. Its versatility and integration capabilities make it an essential asset for both commercial and residential security solutions.