Pulnix TM-76 Manual de instrucciones descargar pdf (Pagina 18)

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Operation

TM-75/76 High-Resolution CCD Camera

3.2.3 External Sync Mode

TM-75/76 accepts standard RS-170 external sync, which is deﬁned as horizontal sync (HD) and vertical

sync (VD). The phase-locked loop jitter is designed to be the minimum (< 5ns) in this category using the

latest PLL chip. The wide capture range enables the camera to operate at an extended temperature range

(optional) of -35°C to 65°C. HD and VD input is TTL level and the input impedance is 75Ω.

3.2.4 Reset-Restart Mode

The camera can be reset asynchronously using EXT VD. In this mode, the camera needs multiple VD

pulses to output valid images, depending on whether it is set to Field or Frame mode. Usually, the ﬁrst

ﬁeld (Field mode) or the ﬁrst frame (Frame mode) are garbage because of previous signal residuals prior

to reset. A frame grabber has to know which frame or ﬁeld to capture. External HD also must be applied

for this operation.

3.2.5 External Shutter Control

The shutter speed or exposure can be controlled with external pulse (TRIG) in this mode. In

combination with Reset-Restart Pulse (EXT VD), the camera can be externally controlled for image-

capture timing as well as for exposure time.

This is an excellent application for capturing multiple images (two ﬁelds of images) of indexing objects

under various lighting or brightness conditions. When Frame mode is selected, the full vertical

resolution is achieved by taking two ﬁelds of shutter images, whether or not you are using an electronic

shutter.

3.2.6 Non-Interlace Operation

With non-interlace external sync, the camera operates at non-interlace scanning. External VD for TM-75

must be generated at integer of 262H ± 8H (Standard interlace is 262.5 H). For the TM-76, it must be

312H ±8H, and the interlace scan is 312.5H.

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Pulnix TM-76 Manual de instrucciones Pagina 18