Pelco IS90 manual DW/CW Series Wide Dynamic Range Adjustments, SW1-2 Line Sync

DW/CW SERIES (WIDE DYNAMIC RANGE) ADJUSTMENTS

Refer to Figure 15 to adjust the IS90-DW or IS90-CW model.

SW1

R7

DEFAULT SWITCH POSITION

Figure 15. Adjusting the IS90-DW/CW Series Camclosure

SWITCH SETTINGS

Locate the DIP switch. Then set the switches for your installation.

SW1-1: Video Format

Set SW1-1 to ON for NTSC. Set it to OFF for PAL. The default is ON.

SW1-2: Line Sync

When multiple cameras are connected to the same switching device, vertical roll may occur on the monitor. AC line lock eliminates vertical roll by locking the frame rate to the power supply frequency. Each camera output is synchronized to the power supply frequency (refer to Vertical Phase Adjustment on page 27 for more information.)

Internal line sync disables line lock and synchronizes cameras internally.

Set SW1-2 to ON to use AC line lock. Set it to OFF to use internal line sync. The default is ON.

SW1-3: Interlaced Scanning/Progressive Scanning

Interlaced scanning is the standard for analog recording installations. Each frame contains one odd and one even field, each processed separately.

Progressive scanning is better for digital recording installations. Each frame is processed as a whole, which results in less blurring and cleaner digital conversion. It also saves storage space on digital video recorders.

Set SW1-3 to ON to select interlaced scanning. Set it to OFF to select progressive scanning. The default is ON.

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