Pulnix TM-6703 Manual de Instruções descarregar pdf (Página 19)

OPERATION

Page 14 TM-6703 Progressive Scan Double Speed Shutter Camera

3.1.4 Progressive Scanning

The TM-6703 uses a state-of-the-art CCD called a “Progressive scanning interline transfer CCD” which

scans all lines sequentially from top to bottom at one frame rate (60 Hz). Like a non-interlace computer

screen, it generates a stable crisp image without alternating lines and provides full vertical TV

resolution of 484 lines. The interline transfer architecture is also important to generate simultaneous

shuttering. This is different from full frame transfer architecture which requires a mechanical shutter or

strobe light in order to freeze the object motion.

The TM-6703 outputs the progressive scanned image with an electronic shutter in three different modes.

These modes are selected via the switches on the rear panel of the camera.

1. Progressive scanning double speed output (Normal mode. Select N, O)

On the rear panel of the camera, select NRM (normal mode), N and O. This produces straight

forward signal output equivalent to non-interlace VGA format (60Hz). Real-time double speed

CCD output is converted through normal analog video processing into 75Ω 1Vp-p output format.

2. Progressive scanning 120Hz output (Rear switches: N, T)

This mode provides 120Hz scanning of the full ﬁeld of view, but with only 242 lines of vertical

resolution. The CCD signals of each row combine to scan 242 lines; the frame speed therefore is

120Hz of non-interlace video. The async reset, electronic shutter and integration function work as

normal. The analog output is the same as 75Ω, 1Vp-p format at the 120Hz rate.

3. Partial scanning output (Rear switches: P, T for 100 lines; P, O for 200 lines)

By selecting 100 line partial scan (P, T), the TM-6703 outputs the central 100 lines of video. It

repeats the same lines at a rate of 200 frames/sec. with the fast dump blanking of unused lines. The

asynchronous reset and electronic shutter functions are maintained at each partial scan.

By selecting 200 line partial scan (P, O), the TM-6703 outputs the central 200 lines of video at a

rate of 125 frames/sec. The partial scan keeps the same resolution as full progressive scan, but with

a narrower ﬁeld of view.

TABLE 1. Scanning Mode Settings

Normal Mode N O (60Hz progressive scan)

Double Scan N T (120Hz progressive scan)

100 Line Scan P O (200Hz progressive scan)

200 Line Scan P T (125Hz progressive scan)

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