(LVAL) signals from camera; the LVAL signal indicates valid lines (pixels).
• DCF used: CLC3NDAL.DCF
Application Note:
Interfacing non-standard cameras to Matrox Pulsar
DALSA CL-C3-1024NJune 11, 1997
Camera
Interface
Details
Mode 1: Fixed line scan rate
• The Matrox Pulsar sends the RS-422 EXPOSURE1 (EXSYNC) signal to the camera; the
camera awaits the rising edge of the signal and after a short (constant) delay initiates line
readout. The line rate is fixed and is determined by the frequency of the EXSYNC signal.
• The HSYNC parameter in the DCF specifies the line rate of the camera and therefore the
exposure time. The total line time is currently set to 1045 pixels. The clock rate is 15 Mhz;
the line rate is therefore 3.5KHz. The line rate of the camera, and therefore the exposure
time, can be modified in the DCF using Matrox Intellicam. Consult the Matrox Intellicam
User Guide for more information.
• The virtual frame rate for the current settings of the DCF is 287µs x 512 = 146.9µs =
6.8Hz. In each virtual frame there are 512 active lines. The host buffer of the Matrox
Pulsar can grab images of up to 2048 x 2048 (4MB) and the display buffer can grab
images of up to 2048 x 1024 (2MB)
• The time between the rising edge of the EXPOSURE1 and EXPOSURE2 signals is the
exposure time. In order to select the exposure time, the width and deployment time of each
EXPOSURE 1 and EXPOSURE 2 must be set in Matrox Intellicam.
T1
287µµs
EXPOSURE 1 (PRIN)
EXPOSURE 2 (EXSYNC)
286µµs
T2
200µµs
534ns
PUL-CID-041
68.27µµs
HSYNC (LVAL)
Line rate
287
1
µ=s
KHz3.5
=
Mode 2: Variable line scan rate
• PSG FPGA version 3.01 or newer is required.
• Line rate is variable and is controlled by the external trigger signal.
• Virtual frame size for this DCF is 1024 x 1 x 512
• Once it has received the external signal to trigger, the Matrox Pulsar sends the RS-422
EXPOSURE1 (PRIN) signal to the camera to initiate exposure. The Matrox Pulsar will
send the RS-422 EXPOSURE2 (EXSYNC) signal to the camera following a delay that is
equal to the desired exposure time. A short (variable) delay after receiving the
EXPOSURE2 pulse, the camera sends the RS-422 LVAL signal to the Matrox Pulsar to
indicate line readout (line valid).
2
Application Note:
Interfacing non-standard cameras to Matrox Pulsar
DALSA CL-C3-1024NJune 11, 1997
Camera
Interface
Details
(continued)
Cabling
Requirements
The maximum possible delay between the EXPOSURE2 pulse and the LVAL pulse is
calculated to be:
EXSYNC to LVAL = 4µs + 11 MCLK pulses + 4 MCLK pulses + 400ns
Maximum = 4µs + (11 x 66.7ns) + (4 x 66.7ns) + 400ns
= 4µs + 0.734µs + 0.267µs + 400ns = 5.4µµs
TTL external trigger
EXPOSURE1 (PRIN)
534ns
EXPOSURE2 (EXSYNC)
HSYNC (LVAL)
exposure time = 200µµs - 534ns
200µµs
variable delay
shift and readout
68.27µµs
Mode 1: Fixed line scan rate
• PULSAR/DIG/MOD required for digital data, syncs and control signals in RS-422 format.
• The connections between the OS1 20-pin dual row connector of the camera and the 68-pin
Interfacing non-standard cameras to Matrox Pulsar
DALSA CL-C3-1024NJune 11, 1997
Mode 2: Variable line scan rate
• IMG-7W2-TO-5BNC cable required for TTL external trigger source and
PULSAR/DIG/MOD required for digital data, syncs and control signals in RS-422 format
• TTL external trigger source should be connected to the TTL Trigger Input of the IMG-7W2-
TO-5BNC cable
• All other connections between the camera and the Matrox Pulsar are as in Mode 1: fixed line
scan rate
The DCF(s) mentioned in this application note can be found on the MIL and MIL-Lite CD, or our FTP site (ftp.matrox.com). The information furnished by
Matrox Electronics System, Ltd. is believed to be accurate and reliable. Please verify all interface connections with camera documentation or manual.
Contact your local sales representative or Matrox Sales office or Matrox Imaging Applications at 514-822-6061 for assistance.
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