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14 I-PentaMAX System Manual Version 3.A
HIGH SPEED SERIAL Connector: The cable that goes from the Camera to the
computer connects to this 9-pin connector. Again, it is essential that the cable
connector locking screws be tightened securely to ensure reliable operation. If the
application requires use of the optional fiber-optic data link to increase the
maximum allowable distance between the Camera and the computer, the fiber-
optic “pod” would be connected to the HIGH SPEED SERIAL connector with a
short length of cable. Then the long distance fiber-optic cable would be connected
to the pod. A similar fiber-optic pod connection is required at the computer.
The computer connection at the other end of the cable depends on the computer
type. See Chapter 3 for detailed information.
VIDEO BNC Connector: This is the composite video output. The amplitude is 1 V pk-
pk and the source impedance is 75 Ω . Either RS-170 (EIA) or CCIR standard
video can be provided and must be specified when the system is ordered. The
video should be connected to the monitor via a 75 Ω cable and it must be
terminated by 75 Ω . Many monitors have a selector switch to select either
terminated or unterminated operation.
Since the image is available at the computer via WinView, use of a separate video
monitor isn’t essential. Note, however, that the monitor view is updated as fast as
the data can be transferred. At the computer, because of the software overhead, the
image is updated more slowly. As a result, for operations such as focusing, where
it is advantageous to track changes as fast as possible, the video output is much
preferred.
The video output is selected by the Application software. In the case of WinView,
this is done by selecting RS170 from the Acquisition menu. Since the view
afforded by the video monitor is limited and fixed, all of the pixels from an array
may not be displayed. For example, some of the image from a 512 × 512 array will
be cropped when viewed on a 756 × 486 RS-170 monitor (NTSC format). When
this is the case, WinView's Video Focus functionality allows you to display the
entire image at reduced resolution or to pan to a subset of the array image.
Note: If more than one device is connected to the video output, the last device is
the one that should to be terminated in 75 Ω. For example, to connect the video
output to a VCR as well as to a monitor, the cable from the controller video output
should be connected to the video input connector of the VCR, and another 75 Ω
cable should extend from the video output connector of VCR to the 75Ω input of
the monitor. Do not use a BNC TEE to connect the controller video output to
multiple devices.