7
3.6 Field and Frame Mode (FLD/FRM)
Field Mode:
Field/Frame mode switch is located on the rear panel. In field mode, two adjacent horizontal lines are combined
and scanned out as shown in figure 8 shown below. There is one line offset between odd field and even field.
The sensitivity in field mode is double for each field scanning (1/60 second). For any moving image capture, field
mode is recommended in order to avoid the smearing phenomenon. However, the resolution is only one field, not
full frame resolution.
Frame Mode:
In frame mode, every other horizontal line is scanned out; this is different from field mode as described above.
For odd field, line 1 is scanned out first. For even field, line 2 is scanned first. Each field has 1/30 second period.
Both odd and even field combined will form a full frame, a period of 1/30 second. For strobe, long-term
integration, and non-moving image capturing, frame mode is recommended. In order to obtain a full frame image,
a frame grabber must be applied to capture the image. It's difficult to distinguish the difference between field
mode and frame mode on a standard TV monitor. In frame mode, shutter function is
disable
.
Figure 8. Field and Frame Mode
