9. Appendix

￿PC Control Codes and Cable Connection

PC Control Codes

Function

Code Data

 

 

 

 

 

 

POWER ON

02H

00H

00H

00H

00H

02H

 

 

POWER OFF

02H

01H

00H

00H

00H

03H

 

 

INPUT SELECT COMPUTER 1

02H

03H

00H

00H

02H

01H

01H

09H

INPUT SELECT COMPUTER 2

02H

03H

00H

00H

02H

01H

02H

0AH

INPUT SELECT VIDEO

02H

03H

00H

00H

02H

01H

06H

0EH

INPUT SELECT S-VIDEO

02H

03H

00H

00H

02H

01H

0BH

13H

INPUT COMPONENT

02H

03H

00H

00H

02H

01H

1AH

22H

INPUT SELECT VIEWER

02H

03H

00H

00H

02H

01H

1FH

27H

PICTURE MUTE ON

02H

10H

00H

00H

00H

12H

 

 

PICTURE MUTE OFF

02H

11H

00H

00H

00H

13H

 

 

SOUND MUTE ON

02H

12H

00H

00H

00H

14H

 

 

SOUND MUTE OFF

02H

13H

00H

00H

00H

15H

 

 

ON SCREEN MUTE ON

02H

14H

00H

00H

00H

16H

 

 

ON SCREEN MUTE OFF

02H

15H

00H

00H

00H

17H

 

 

 

 

 

NOTE: Contact your local dealer for a full list of PC Control Codes if needed.

 

 

Cable Connection

Communication Protocol

 

Baud rate

38400 bps

Data length

8 bits

Parity

No parity

Stop bit

One bit

X on/off

None

Communications procedure

Full duplex

NOTE: Depending on the equipment, a lower baud rate may be recommended for long cable runs.

PC Control Connector (D-SUB 9P)

To TxD of PC

To RxD of PC

To GND of PC

1 2 3 4 5

6 7 8 9

To RTS of PC

To CTS of PC

NOTE: Pins 1, 4, 6 and 9 are no used.

NOTE: Jumper “Request to Send” and “Clear to Send” together on both ends of the cable to simplify cable connection.

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NEC VT770 manual PC Control Codes and Cable Connection, 121, PC Control Connector D-SUB 9P

VT770 specifications

The NEC VT770 is a versatile and powerful projector designed for various applications, primarily in educational and corporate environments. It stands out for its remarkable image quality, ease of use, and innovative features that cater to both presenters and audiences.

One of the key features of the VT770 is its native XGA resolution (1024 x 768 pixels), which ensures clear and detailed images. It utilizes a 3LCD technology, which contributes to bright, vibrant colors and high light output. With a brightness rating of 2800 ANSI lumens, it performs exceptionally well in diverse lighting conditions, making it suitable for medium to large-sized rooms without compromising image quality.

The VT770 offers a contrast ratio of up to 600:1, which enhances the distinction between the brightest whites and the deepest blacks. This feature is particularly beneficial for presentations that involve detailed graphs or images, as it allows for precise visual communication. The projector’s lamp life extends to approximately 6000 hours in eco mode, thus reducing operational costs and the frequency of replacements.

Connectivity is another area where the VT770 excels. It comes equipped with multiple input options, including VGA, composite video, S-video, and HDMI. This flexibility allows users to connect various devices such as laptops, DVD players, and video game consoles seamlessly. Additionally, the projector supports optional wireless connectivity, enabling presentations without the hassle of cables.

User-friendly features are integrated into the VT770, including an intuitive control panel and remote control, allowing easy adjustments and navigation through settings. The projector also incorporates keystone correction, which aids in aligning the image and ensuring a squared display despite the projection angles.

Another distinguishing characteristic of the VT770 is its lightweight and portable design, making it an excellent choice for professionals on the go. It can be easily transported between locations, enabling spontaneous presentations without the need for extensive setup time.

In conclusion, the NEC VT770 is a feature-packed projector that combines high-quality imaging with flexible connectivity and user-friendly operation. Its suitability for educational and business presentations makes it an invaluable tool for professionals seeking reliable performance and portability.