Pulnix TMC-6700 Series Bedienerhandbuch PDF herunterladen (Seite 28)

Page 20

Operation

TMC-6700/1000 Series Progressive Scan CCD Digital Color Camera

FIGURE 9. Asynchronous Reset

3.5.2 Asynchronous Reset and Shutter Speed

The TMC-6700/1000 series asynchronous reset operates with internal sync or external HD for phase

locking. When VINIT pulse is applied, it resets the camera’s scanning and purges the CCD. There are

three modes to control the asynchronous reset and shutter speed:

• External VINIT with pulse width control

• Internal shutter speed with fast mode

• Internal shutter speed with slow mode

3.5.2 (a) External Pulse Width Control Mode

To select the external pulse width control mode, set the shutter dial switch to “9.” Apply a VINIT signal

with controlling pulse width, which can be generated from an external event trigger to the camera. The

internal reset pulse will latch to HD. The duration from the first VINIT pulse leading edge to rising

edge, X, controls the shutter speed as follows:

Shutter speed ts = X (1H resolution)

1H = 63.5 µsec.

Min. pulse width = 1H

VINIT

SG (TRANSFER GATE)

DISCHARGE PULSES

VIDEO

ASYNC RESET

Stand-by Image

Async Image

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Pulnix TMC-6700 Series Bedienerhandbuch Seite 28