Field And Frame Modes; Rs-232 Commands - IAI AG-7000 User Manual

Note: Fig. 32 through Fig. 33 show horizontal and vertical timing details for interlaced and non-
interlaced operation.
4.2.2
The standard factory setting for the AG-7000 camera is FIELD MODE. The mode selection is on the
back panel of the camera.
4.2.2.1
In Field Mode, two horizontal rows are scanned together, changing the pair at each interlace scan.
The sensitivity of the CCD is doubled for one field of integration, therefore it can obtain the same
sensitivity as in Frame Mode in half the period of time. This is an advantage when the shutter is
used often. Because of the alternating two-row scanning, Moire is almost unnoticeable. While the
vertical resolution is not as good as in Frame Mode, it is sufficient to view the full vertical resolution
of the TV format. Note: Only odd fields are output in this mode. Field mode cannot provide full
frame resolution with strobe lighting applications.
4.2.2.2
In Frame Mode, each horizontal row is scanned as interlace scanning. The integration of each pixel
is one frame period. Vertical pixel resolution is good, and exact location is obtained. A disadvantage
as compared with Field Mode is the tendency to show vertical Moire. For strobe lighting, Frame
Mode must be used to achieve full frame resolution.

4.3 RS-232 Commands

The AG-7000 Camera can be controlled by means of RS-232 communications. Commands are sent to
the camera as a string of ASCII characters. Each command begins with a start character of ":" and
ends with the end character CR (Decimal 10, hex D) which is indicated as <cr> in the table below.
The camera will acknowledge successful receipt and processing of the command with the response
specified in the table below. If, for any reason, the camera cannot recognize or process a command,
it will respond with the Nack response ":e"<cr>.
The camera will generate output only in response to an input command. Commands are not
buffered. A new command should not be sent until the camera has responded to the previous
command. Any input to the camera will be ignored until processing of the current command has
completed and the camera response has been output. Similarly, all characters received after the
end character <cr>, but before the receipt of the start character ":" will be ignored.
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Field and Frame Modes

Field Mode
Frame Mode
Functions and Operation
AG-7000