Справочник Пользователя для Pelco CM9700UTP32A

C3646M-C  (6/09)

13

For optimal tuning, adjust the rotary switch located on the front panel to the correct color video range position. Refer to Figure 8 and Table D, and 
then complete the following steps:

1. Plug the power cord into a power source to turn on the unit. The LED for the camera input on the front panel turns green if the channel is set 

to the correct color video range. If the color video range is incorrect, the LED turns orange or red.

NOTE: The color burst signal-to-noise ratio is very low for cable lengths around 4,000 ft (1219 m) and longer, depending on the type of 
cable used. The video activity LED might not indicate the correct video status (for color or black-white). Pelco does not recommend 
operating the unit in an excessive noise environment, where picture quality could be compromised. For information about the color burst 
signal, refer to the Advance Color Video Signal Settings on page 15.

2. Observe the video on the monitor. If required, turn the rotary switch on the front panel to match the color video range (cable length) of the 

device connected to the receiver. Refer to Figure 8 and Table D for rotary switch positions and cable lengths.

3. Initial system setup (only): The device automatically adjusts the gain and adapts to the cable length in the range specified by the rotary 

switch; however, during initial installation, if the burst level is lower than a defined threshold, adjustment of the DIP switches may be 
required. To set the DIP switches for color video at initial power-up, complete the following steps:

a.

Unscrew the four thumb screws located on the front panel of the receiver.

b.

Carefully open the front panel until the hinges are completely exposed; the front panel should remain attached to the receiver.

c.

Refer to Table E on page 14 to set the DIP switches to obtain the desired video quality. Refer to Figure 9 on page 14 for the 
arrangement of the DIP switches on the front panel.

d.

Disconnect and reconnect the video input.

e.

If the gain is still insufficient, increase the gain of the DIP switch (refer to Table E on page 14), and then repeat step d.

Figure 8. Factory Default Dial Position (32-channel model shown)

•

Rotary switch settings are dependent upon the installation, the type of cable used, and the connections made.

•

The default setting for the DIP switch is medium gain (refer to Black-White or Day/Night Video Settings on page 14).

•

The unit starts in black-white mode. If the gain is incorrectly set for color video, the color burst amplitude may not be adequate (< 70 mV) to 
switch the device to automatic gain control (AGC) mode.

Table D. Rotary Switch Settings

0 to 1,000 ft (0 to 300 m)

1 

1,000 to 2,000 ft (300 to 600 m)

2 

2,000 to 3,000 ft (600 to 900 m)

3 

3,000 to 4,000 ft (900 to 1,200 m)

4 

3

1

2

3

4

5

6

7

8

17

18

19

20

21

22

23

24

MADE IN USA

MADE IN USA

2

4

1

3