Focus Control, White Balance Control | Sanyo VCC-MD800P, VCC-MD400P

Function Descriptions

Optical Zoom Limit Settings

The optical zoom magnification can be limited using the Optical Zoom Tele Limiter command. The digital zoom cannot be used if the limit is set to the Tele side.

Digital Zoom

A maximum of 16x digital zoom can be set with the Digital Zoom Tele Limiter command. Together with the optical zoom, a maximum of 480x is possible, however, the resolution decreases.

Although the vertical resolution can be increased by enabling the V-Reso.UP function using the V-Reso. UP ON command, residual images and blurring may become more apparent with moving subjects.

[2] Focus Control

Manual Focus

The manual focus can be operated using Far/Near or directly moving the focus to a specific position.

⁃⁃ Far /Near

Transmit the Far or Near command to execute the Far/Near operation at the speed configured by the Far/Near Speed command. The Stop command stops the operation. (The operation does not stop without transmitting the Stop command.)

The speed targets are as follows.

	Required Time (s) from Near End → Far End
Settings		at the Near Limit 1m and Tele End
Settings	x36	MD700	x30	MD500	x22	MD300
		MD700		MD500		MD300
		MD800		MD600		MD400
		MD800		MD600		MD400
1		19.7		16.0		19.0
2		10.3		8.3		9.7
3		4.4		3.6		6.6
4		2.4		2.1		5.2

⁃⁃ Direct

The Direct command can move the zoom lens to the specified focus lens position.

⁃⁃ Auto Focus

The Auto Focus ON command sets the mode to auto focus and automatically focuses on the subject if the subject moves. This mode is cancelled when the Manual Focus ON, Near, or Far command is used. Although the minimum focus distance is set to 1m by default, this can be changed by using the Near Limiter command. In addition, the sensitivity of the AF to the change in subject can be changed using the Auto Focus Sensitivity command and the focusing area can be changed using the Focus Area command.

One-Push Auto Focus

The auto focus can be moved only once using the One Push Trigger command. The mode prior to starting the auto focus is retained after focusing.

Focus Lens Offset

When covering a camera, such as the dome camera with a cover or similar, the refraction of the light due to the cover changes the OPL. This may result in close subjects being out of focus when using a powerful zoom.

In that case, it is necessary to move the range of motion of the focus lens depending on the change in OPL.

Validate the Offset using the Cover Offset ON command and transmit a Cover Offset Level command so that subjects that are at approximately 1m TELE edge (When the Near Limit is 1m) are in focus.

In the same way that 0 sets the level to OFF, the larger the number, the greater the offset.

[3] White Balance Control

⁃⁃ ATW

Auto Trace White Balance.

・SMART ATW

This mode controls retracing of ATW according

to the size of single-colour object in the screen, addition to normal ATW mode control.

In case the single-colour object covers most of the area in the screen, WB control function shall be stopped.

Also, the retracing speed is slower than that of normal ATW mode.

*This mode is valid when WB mode is set to ATW.

⁃⁃ AWC

The Push-Lock Auto White Balance starts retracting using the One Push Trigger command and locks the white balance after approximately 2 seconds.

In addition, after executing the One Push Trigger command, the mode returns to the previous mode by executing the AWC Reset command.

⁃⁃ 3200K

Color temperature 3200K fixed mode.

⁃⁃ 5600K

Color temperature 5600K fixed mode.

⁃⁃ FLUO

Color temperature 4200K fixed mode.

⁃⁃ MWB

Manual White Balance. The R and B gains can each be configured to a range of 0 to 255.

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