JAI TM-1020 - Manual (Page 29)

Page 19
TM-1020 Series Progressive Scan Shutter Cameras
Operation
The TM-1020 series outputs the progressive-scanned image with an electronic shutter in two different
formats:
1. Progressive-scanning digital and analog output
The CCD signal goes through A/D and D/A converters and through 10-bit in, 8-bit out
look-up table (LUT).
The analog output is the same as 75
Ω, 1Vp-p format available from BNC and 12-pin con-
nector. The digital output is available from 31-pin connector (RS-422 or RS-644) or
Camera Link connector.
2. Double-speed scanning output (display output)
By selection, the two-row binning mode puts double-speed video for monitor display. It
repeats twice from one frame of input video. Refer to Section 3.8 on page 27 for infor-
mation on scan modes.
3.4 Electronic Shutter
The TM-1020 series has a substrate drain-type shutter mechanism which provides a superb picture at
various speeds without smearing. A built-in manual shutter speed control selects the electronic shutter
rate of 1/60 (non-async mode only), 1/125, 1/250, 1/500, 1/1,000, 1/2,000, 1/4,000, 1/8,000, or 1/16,000
second.
With VINIT high (5V), the CCD keeps discharging. With a negative pulse to VINIT, the camera resets
and purges the charge momentarily. Then it starts integrating for the period of shutter control set by
either an external pulse width or internal shutter control. Progressive scanning permits a full 1000 lines
of vertical resolution, as compared to a conventional CCD camera which captures only half the vertical
lines per shutter.
3.5 Integration
The CCD imager of the TM-1020 series can be exposed for longer than the normal scan timing of 1/15
sec. This integration feature provides extra sensitivity for dark-environment applications. The
progressive-scan imager permits a full frame of resolution in non-interlace format. Integration is
achieved by controlling the #11 pin of the 12-pin connector to low (GND) or providing pulse-width
control up to 1/15 frames. Please refer to Figure 2.2.2 on page 6 for pin-out information on the 12-pin
connector.