24
ROI Move Mode with external CCx Input
5.7.5.
Command
:l<n><y>
<n> = 0 ... 3
<y> = 1 ... f
hex
0 = off; 1 =y; 2 = x; 3 = x+y
step y-direction
:l?
Response
--*
* ACK/NAK if acknowledge on
<ny>
current value
Description
This feature allows to move the actual ROI with the CC2…CC4
inputs of the CameraLink
®
interface. The signal can be gener-
ated by the framegrabber itself or by external signals that are
input to the grabber. The stepping in x-direction is always 24
pixels, the stepping in y-direction can be selected from1-15 with
the
<y>
parameter. Move will always be in positive direction. If
the right side or the bottom of the sensor is reached no action
will be on further input signals. With CC4 the position is reset to
the original position; This is not necessarily the top left edge of
the sensor.
Notice
The input frequency can be up to 20kHz. The signals will be added be-tween the
frames. The added move signals are synchronized to the next frame. The internal
process time is 500µs where no signals can be counted. This is immediately after the
exposure meaning that signals input before 500µs after the falling edge of 'strobe' will
be lost.
Signal
CC2 = y-increment
CC3 = x-increment
CC4 = reset to original position
Example
ROI 1280x390 pixel at 287fps and 1ms exposure time. Pulses
with 20kHz.
There are 3ms time to send pulses. In this time 60 pulses can
be sent from frame to frame.
So the possible 634 lines will take 38ms to move and 11 frames
will be exposed in this time.
Notice
This mode can not be combined with multiple ROI mode, x- or y- invert mode and mask
mode.
Summary of Contents for HXC13
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