Redlake MASD 1.4i User manual

Manual No. 91000050-002
Revision A
October 1, 2001
The MegaPlusâ
Model 1.4i Camera
User’s Manual
Redlake MASD, Inc.
11633 Sorrento Valley Road
San Diego, California 92121-1097
Telephone: [phone] (USA and Canada only) Outside the USA: 858 481-8182
Fax: [phone]. Internet: www.redlake.com

REDLAKE MASD, INC.
List of Manual Revisions
User’s Manual – Model 1.4i, Part Number 91000050-002
Revision Date EO No. Notes
A 10-01-01 Reissued to reflect Redlake MASD, Inc. change and
general editorial changes.
RELATED DOCUMENTS
MegaPlus Remote Control Panel User’s Manual, Part Number 91000055-001
FCC DECLARATION OF CONFORMITY
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Subpart B of Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy, and if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
· Reorient or relocate the receiving antenna.
· Increase the separation between the equipment and receiver.
· Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
· Consult the dealer or an experienced radio/TV technician for help.
This equipment has been certified to comply with the limits for a Class A computing device,
pursuant to FCC rules. In order to maintain compliance with FCC regulations, shielded cables
must be used with this equipment. Operation with non-approved equipment or unshielded cables
is likely to result in interference to radio and TV reception. The user is cautioned that changes
and modifications made to the equipment without the approval of the manufacturer could void the
user’s authority to operate this equipment.
Copyright ã2001 Redlake MASD, Inc.
The information in this manual is for information purposes only and is subject to change without notice.
Redlake MASD, Inc. makes no warranty of any kind with regards to the information contained in this manual,
including but not limited to implied warranties of merchantability and fitness for a particular purpose.
Redlake MASD, Inc. shall not be liable for errors contained herein nor for incidental or consequential
damages from the furnishing of this information. No part of this manual may be copied, reproduced,
recorded, transmitted or translated without the express written permission of the Redlake MASD, Inc.
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MegaPlus®Model 1.4i
PRECAUTIONS
WARNING!
LIFE SUPPORT APPLICATIONS POLICY
MegaPlus cameras are not authorized for and should not be used within life support
systems without the specific written consent of Redlake MASD, Inc.
NON-CRITICAL MEDICAL APPLICATIONS
MegaPlus cameras must be grounded to building earth ground while operating. This
camera has passed IEC 601 class B standards.
The voltage drop on the camera’s power return line must be less than 0.5 Volts DC.
Use a heavier gauge power cable to reduce the voltage drop below 0.5 Volts DC. Fo
r
medical applications, any power supply connected to the camera must meet IEC 601
specifications.
CAUTION:
A
laser beam focused on the sensor, either directly or by reflection, can cause
permanent damage to the sensor. Any laser powerful enough to produce
localized heating at the surface of the sensor will cause damage, even if the
camera power is off. A sensor damaged by laser light is NOT covered by the
warranty.
OPERATING TEMPERATURE
The MegaPlus camera is designed to operate satisfactorily in an environment where the ambient
temperature is between 0° and 35°C (32° and 95°F), with no water condensation present.
STORAGE TEMPERATURE
Do not store the equipment in an area where the temperature will drop below –25°C (-13°F) or
exceed 80°C (176°F). Do not allow moisture to condense on the system.
SHIPPING
When shipping, use a carton that protects the camera from shock and moisture, similar to the
carton in which the unit was originally delivered. Do not ship the equipment in a cargo area
where the temperature will drop below -25°C (-13°F) or exceed 80°C (176°F). Do not allow
moisture to condense on the system.
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TABLE OF CONTENTS
1. INTRODUCTION ............................................................................................................... 1-1
1.1 Introduction..................................................................................................................... 1-1
1.2 How to Use This Manual ................................................................................................ 1-1
2. CONTROLS AND CONNECTORS ................................................................................... 2-1
2.1 Camera........................................................................................................................... 2-1
2.1.1 Mounting the Camera ............................................................................................. 2-1
2.1.2 Attaching the Lens .................................................................................................. 2-1
2.2 Camera Rear Panel ....................................................................................................... 2-2
2.2.1 Digital Interface ....................................................................................................... 2-2
2.2.2 Strobe Output.......................................................................................................... 2-2
2.2.3 DC Power Input....................................................................................................... 2-2
2.3 Cables ............................................................................................................................ 2-3
2.4 Hardware Setup ............................................................................................................. 2-4
2.5 Routine Maintenance ..................................................................................................... 2-5
3. CAMERA OPERATION ..................................................................................................... 3-1
3.1 Introduction..................................................................................................................... 3-1
3.2 Serial Communications Protocol .................................................................................... 3-1
3.3 Error Messages.............................................................................................................. 3-1
3.4 Mode Control.................................................................................................................. 3-1
3.4.1 Trigger..................................................................................................................... 3-2
3.4.2 Continuous .............................................................................................................. 3-2
3.4.3 Control .................................................................................................................... 3-2
3.4.4 Parallel Interface ..................................................................................................... 3-2
3.5 Shutter............................................................................................................................ 3-3
3.6 Exposure ........................................................................................................................3-4
3.7 Trigger ............................................................................................................................ 3-5
3.8 Gain................................................................................................................................ 3-6
3.9 Black Level .....................................................................................................................3-6
3.10 Strobe Polarity ............................................................................................................ 3-7
3.11 Defect Concealment ................................................................................................... 3-7
3.12 Reset .......................................................................................................................... 3-7
3.13 Save............................................................................................................................3-8
3.14 Status Query............................................................................................................... 3-8
3.15 Identification Query..................................................................................................... 3-8
4. INTERFACE SPECIFICATIONS ....................................................................................... 4-1
4.1 Introduction..................................................................................................................... 4-1
4.2 Digital Video Connector ................................................................................................. 4-1
4.3 Digital Video Outputs ..................................................................................................... 4-1
4.4 Timing Outputs............................................................................................................... 4-1
4.5 Control Inputs................................................................................................................. 4-2
4.6 Mode Control Lines ........................................................................................................ 4-2
4.7 Sensor Specifications..................................................................................................... 4-9
4.8 Frame Rate Data.......................................................................................................... 4-10
4.8.1 Frame Rates ......................................................................................................... 4-10
4.8.2 Frame Transfer Time ............................................................................................ 4-10
4.8.3 Frame Repetition Rate.......................................................................................... 4-10
4.9 Timing Waveforms ....................................................................................................... 4-11
4.9.1 Exposure Timing ................................................................................................... 4-11
4.9.2 Frame Timing........................................................................................................ 4-12
4.9.3 Line Enable ........................................................................................................... 4-13
4.9.4 Pixel Timing .......................................................................................................... 4-13
4.10 Specifications ........................................................................................................... 4-14
4.10.1 Video Performance ............................................................................................... 4-14
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4.10.2 Camera Mechanical .............................................................................................. 4-14
4.10.3 Temperature ......................................................................................................... 4-14
4.10.4 Humidity ................................................................................................................ 4-14
LIST OF FIGURES
Figure 2-1. Camera Body ............................................................................................................. 2-1
Figure 2-2. C-Mount Lens Length Limit........................................................................................ 2-1
Figure 2-3. 1.4i Rear Panel .......................................................................................................... 2-2
Figure 2-4. 1.4i Cable Types ........................................................................................................ 2-3
Figure 2-5. Component Connection Diagram............................................................................... 2-4
Figure 4-1. Digital Interface Connector.........................................................................................4-3
Figure 4-2. 68-Pin Digital Interface Cable .................................................................................... 4-4
Figure 4-3. 37-Pin Connector ....................................................................................................... 4-5
Figure 4-4. 9-Pin Connector ......................................................................................................... 4-5
Figure 4-5. 9-Pin PC COM Port/37-Pin Frame Grabber Cable .................................................... 4-6
Figure 4-6. 68-Pin Frame Grabber Connector ............................................................................. 4-7
Figure 4-7. 9-Pin PC COM Port/68-Pin Frame Grabber Cable .................................................... 4-8
Figure 4-8. Sensor Organization .................................................................................................. 4-9
Figure 4-9. Exposure Timing Waveform ......................................................................................4-11
Figure 4-10. Frame Timing (Continuous Mode) Waveform ........................................................ 4-12
Figure 4-11. Line Timing Waveform............................................................................................ 4-13
Figure 4-12. Pixel Clock Timing.................................................................................................. 4-13
LIST OF TABLES
Table 4-1. Mode Control Lines...................................................................................................... 4-2
Table 4-2. Digital Interface Connector Pinout (On Rear of Camera)............................................ 4-3
Table 4-3. 37-Pin Frame Grabber Cable Pinout ........................................................................... 4-5
Table 4-4. 9-Pin PC COM Port Cable Pinout................................................................................ 4-5
Table 4-5. 68-Pin Frame Grabber Interface Cable Pinout............................................................ 4-7
Table 4-6. Sensor Specifications .................................................................................................. 4-9
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MegaPlus®Model 1.4i
1. INTRODUCTION
1.1 Introduction
The MegaPlus Camera is a high-resolution solid-state camera designed for scientific and
industrial imaging applications. The system consists of a DC powered Camera Head with a 68
pin digital interface. There are no manual user controls on the camera, however the camera is
operated by commands sent through a serial communication link. The Camera works with either
an RS232 or RS422 serial communications command input.
The operation of the MegaPlus Camera is very similar to the operation of a 35mm film camera. In
a film camera, the film is exposed by opening the shutter for a specific amount of time. The
shutter then closes and the film is advanced to the next frame. In the MegaPlus Camera, a built-
in electromechanical shutter is used the same way. The shutter opens exposing the sensor, and
then closes while the image captured by the sensor is sent to a frame store device. The shutter
in the MegaPlus Camera can be controlled internally or externally.
The Camera Head features a high-resolution Charge-Coupled-Device (CCD) array containing
1,317 (H) x 1,035 (V) light sensitive elements (pixels). These pixels are 6.8 microns square and
have a center-to-center spacing of 6.8 microns (100% fill ratio). Using a high quality lens with the
MegaPlus Camera will produce the best possible resolution.
The equal horizontal and vertical geometry simplify measurements taken with the camera. The
benefit of having a 100% fill ratio is reduced aliasing, improved subpixel accuracy, and a 100%
light sensitive area. The Camera output has an 8-bit digital video output containing 256 levels of
gray for each pixel. Exposure is adjustable from 1 millisecond to 100 seconds in 1-millisecond
increments using the internal exposure control. Exposure times from 1 millisecond to the longest
time practical can be had by using an external exposure control signal.
The camera can be triggered asynchronously to capture high-speed events. Separate exposure
and readout cycles can be achieved by using a pulsed illumination light source such as a strobe.
An external strobe flash unit can be synchronized through a BNC connector on the rear panel of
the camera. This dramatically improves picture quality when the object being photographed is in
motion.
The MegaPlus Camera is ruggedly designed and can accommodate moderate amounts of shock
and vibration. Gaskets protect the camera’s interior components from dust, contaminants and
EMI.
1.2 How to Use This Manual
WARNINGS, CAUTIONS and NOTES
As you read this manual, you will notice that some of the information is presented as a
WARNING, CAUTION or NOTE. It is important that you understand the significance of these
terms.
A WARNING is important to the safety of anyone operating the Camera and should not be
disregarded under any circumstances.
A CAUTION is intended to alert you to an operation or condition that may cause loss of data or
harm to your Camera.
A NOTE contains information that is important to the operation of your Camera.
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Chapter 1 contains an introduction to the MegaPlus camera, an explanation of this manual and a
warranty statement.
Chapter 2 explains the function of the controls and connectors of the MegaPlus Camera.
Chapter 3 is intended to give the user some insight into how to choose the correct mode of
operation for this MegaPlus camera. The correct mode of operation is defined as what will get
the imaging results you are looking for.
Chapter 4 details the specifications of the MegaPlus camera with the intent to give you all of the
information you require when using this camera.
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MegaPlus®Model 1.4i
NEW EQUIPMENT WARRANTY
REDLAKE MASD, INC. MEGAPLUS CAMERA
REDLAKE MASD, INC. (HEREAFTER REFERRED TO AS REDLAKE) WARRANTS THIS
CAMERA, AND ACCESSORIES MANUFACTURED BY REDLAKE, TO FUNCTION PROPERLY
FOR ONE YEAR FROM THE DATE OF SHIPMENT.
Redlake agrees to perform the following equipment warranty services in the United States.
1. Repair service: if shipped to us, repairs will be made at no charge.
2. Parts replacement: replacement parts installed under warranty will be provided at no charge.
THIS WARRANTY DOES NOT APPLY TO THE FOLLOWING CONDITIONS:
• Failure to operate the MegaPlus Camera in accordance with Redlake’s written instructions,
including environmental specifications listed in the User’s Manual.
• Evidence of the Camera being subjected to accidental damage, misuse or abuse.
• The Camera having been repaired or tampered with by persons other than Redlake personnel,
customer personnel trained by Redlake or without permission of Redlake.
• Shipping damage is not covered by this warranty. The purchaser has the responsibility to place
a claim of damage in shipment with the carrier.
REDLAKE MASD, INC. MAKES NO OTHER WARRANTIES, EXPRESSED, IMPLIED, OR OF
MERCHANTABILITY FOR THIS EQUIPMENT. IF THIS CAMERA DOES NOT FUNCTION
PROPERLY DURING THE WARRANTY PERIOD, REDLAKE WILL REPAIR IT WITHOUT
CHARGE ACCORDING TO THE TERMS STATED ABOVE. REPAIR WITHOUT CHARGE IS
REDLAKE’S ONLY OBLIGATION UNDER THIS WARRANTY. REDLAKE WILL NOT BE
RESPONSIBLE FOR ANY CONSEQUENTIAL OR INCIDENTAL DAMAGES RESULTING FROM
THE SALE, USE OR IMPROPER FUNCTIONING OF THIS EQUIPMENT EVEN IF LOSS OR
DAMAGE IS CAUSED BY THE NEGLIGENCE OR OTHER FAULT OF REDLAKE.
REDLAKE and MEGAPLUS are trademarks.
ãRedlake MASD, Inc. 2001
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MegaPlus®Model 1.4i
2. CONTROLS AND CONNECTORS
2.1 Camera
NOTE: A lens cap is installed on each camera to keep dust from getting on the optical sensor or
components when it is shipped. Remove the lens cap and install your lens in a dust free
environment.
2.1.1 Mounting the Camera
The MegaPlus Camera Head has four threaded screw holes for mounting, two on the bottom and
two on the top of the camera body. All holes accept 1/4-20 threaded screws. In most situations
the camera is attached to a tripod via the mounting point on the bottom of the Camera Head. It is
a good practice to mount the camera head on the tripod before attaching a lens to the camera.
Figure 2-1. Camera Body
2.1.2 Attaching the Lens
The camera can be purchased with either a C-mount or F-mount lens adapter. If your camera is
equipped with an F-mount lens adapter, insert the lens into the locking ring, then rotate the lens
counterclockwise until it clicks into position. To remove the lens, hold the release button down as
you rotate the lens clockwise.
If your camera is equipped with a C-mount lens adapter, screw the lens clockwise into the
adapter until you are no longer able to turn the lens with light pressure.
CAUTION: Some C-mount lenses may extend into the camera more than 0.20 inches
(5.08 mm), which may cause damage to internal optical components. Check the
dimension of any lens you plan to use as shown in Figure 2-2.
Figure 2-2. C-Mount Lens Length Limit
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Figure 2-3. 1.4i Rear Panel
2.2 Camera Rear Panel
2.2.1 Digital Interface
This is a 68-pin, high density, dual row, D type connector that interfaces the MegaPlus Camera to
a frame grabber board and serial communication interface for camera control. The frame grabber
board processes and displays video from the camera. A complete technical description of the
connector and the signals that it carries is contained in chapter four of this manual.
2.2.2 Strobe Output
The leading edge of this output signal can be used to fire a strobe light. This output signal is TTL
compatible and can drive a 50-ohm load. A strobe light with a flash duration of less than
1 millisecond is useful for capturing images of fast moving objects.
2.2.3 DC Power Input
This two-pin connector is the power input for the camera. The power supply voltage should be
between 12 and 28 volts DC measured at the connector on the camera rear panel. The current
draw is a maximum of .8 amps at the lowest input supply voltage and .3 amps at the highest input
supply voltage.
WARNING!
Reversing the polarity of the DC voltage input or voltage levels in excess of 30 volts may
permanently damage the camera
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MegaPlus®Model 1.4i
2.3 Cables
There are three different cables available to connect the MegaPlus Camera to your computer, as
shown in Figure 2-4 below.
Figure 2-4. 1.4i Cable Types
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2.4 Hardware Setup
Follow the instructions supplied by the frame grabber manufacturer when you are using their
cables to install your camera. If using Redlake supplied cables, connect the camera as shown in
Figure 2-5 below.
Figure 2-5. Component Connection Diagram
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MegaPlus®Model 1.4i
2.5 Routine Maintenance
There are no user serviceable parts in the camera. Should the shutter malfunction, the camera
must be returned to the factory for repair.
The lens should be cleaned according to good photographic practices. This will help keep your
camera producing top quality pictures.
The camera can be ordered from the factory with an infrared filter installed in the lens mount. If an
infrared filter was not ordered originally, a piece of clear glass will be installed in place of the filter.
The filter or its glass replacement keep the interior of the camera sealed from dust and should
never be removed in other than a clean room environment. Because of the high resolution of the
camera, a single speck of dust on the sensor is very noticeable.
If you need to use different filters in your application from time to time, we recommend that you
order the camera with the clear glass installed. The spectral sensitivity can then be changed by
exchanging filters on the end of the lens as in 35mm photography.
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MegaPlus®Model 1.4i
3. CAMERA OPERATION
3.1 Introduction
The MegaPlus Camera, Model 1.4i does not have any manual controls. Camera operation is
accomplished by commands sent to the camera through a serial data link from a personal
computer. In this chapter we will present the various operating modes of the camera with an
explanation of the function followed by the command sequence that must be transmitted by the
computer. The control lines to the camera can be configured as an RS232 or an RS422 serial
data link. The camera is ordered from the factory configured one way or the other. The
command syntax is the same in either case.
3.2 Serial Communications Protocol
The camera uses a full duplex UART type asynchronous system, using standard nonreturn-to-
zero (NRZ) format (one start bit, eight data bits, one stop bit, no parity). The baud rate is fixed at
9600. The character code is based on the ASCII standard.
The character flow control protocol is XON/XOFF. XON is assigned DC1 (control-Q) and XOFF
is assigned DC3 (control-S). The receiver sends the XOFF character when it wants the sender to
pause in sending data and an XON character when it wants the sender to resume.
The camera will recognize a command as three command characters, followed by a space bar
character, followed by an argument that consists of one or more characters, ended by the
carriage return and line feed characters. The camera responds to a valid command with a
carriage return and line feed (CR-LF).
The camera will recognize a query as three command characters, followed by the question mark
character, then ended by the carriage return character.
The camera responds to a query with three command characters, followed by a space bar character, followed by an
argument that consists of one or more characters, then ended by carriage return character and line feed (CR-LF).
3.3 Error Messages
The camera can respond to an erroneous command or query in one of three possible ways.
MESSAGE FROM CAMERA EXPLANATION
ERROR-SYNTAX The camera cannot make sense of the command.
ERROR-ARGUMENT OUT OF RANGE The command is recognized, but the argument is
out of range or indecipherable.
ERROR-TRANSMISSION The receiver detected a transmission error such
as buffer overflow, parity, noise, or framing
3.4 Mode Control
The MegaPlus Camera operates in one of three modes, TRIGGER, CONTINUOUS, or
CONTROL. The mode of operation is selected by the mode command. The mode command’s
fourth option, PARALLEL INTERFACE, delegates mode selection to three control lines, MC0 -
MC2, input through the Digital Interface Connector
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3.4.1 Trigger
Each exposure is started by a signal connected to the EXPOSE input pins of the “Digital
Interface” connector on the rear panel of the camera. The exposure command sets the exposure
time and, indirectly, the frame rate.
The EXPOSE input sets the start time for each frame of video. When the trigger signal lasts
longer than the combined exposure and readout time, the camera will continue to take exposures
until the trigger signal goes away.
The trigger mode of operation is used to capture a single picture or sequence of pictures. If the
object that you are trying to capture is fast moving, a strobe light may be used to freeze the
action. The short flash duration (sometimes less than 50 microseconds) of a strobe is the key to
minimizing blur caused by speedy subjects. The Strobe Output on the rear panel of the camera
can be used to start the strobe flash.
3.4.2 Continuous
The continuous mode of operation is useful when the operator wishes to monitor an ongoing
event. The camera will repeatedly take pictures as fast as the exposure time selected allows.
The exposure command sets the exposure time and indirectly the frame rate. Each new
exposure starts as soon as the previous image has been transferred to the camera output by the
camera electronics.
3.4.3 Control
The start and exposure time of each picture is controlled directly by the user. Control is
accomplished by the EXPOSE input pins in the “Digital Interface” connector on the rear panel of
the camera. The exposure time is equal to the time the EXPOSE input signal is true.
3.4.4 Parallel Interface
This option provides compatibility with previous models of the MegaPlus Camera. This mode
enables limited camera control by a frame grabber board installed in a host computer. When the
mode is set to Parallel Interface, the state of the control lines MC0, MC1, and MC2 determine the
operating mode of the Camera. See page 4.2 for details on control lines MC0 - MC2.
TYPE IN: RESPONSE EXPLANATION
MDE xx CR-LF Sets the mode as determined by the argument TR,
CS, DC, PI.
MDE? Queries the current mode setting.
MDE xx Means the mode is set as indicated.
Sample commands with arguments:
MDE TR Sets the mode to TRIGGER.
MDE CS Sets the mode to CONTINUOUS.
MDE CD Sets the mode to CONTROLLED.
MDE PI Delegates mode control to Control Lines MC0 – MC2.
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MegaPlus®Model 1.4i
3.5 Shutter
The MegaPlus Camera may be operated with the shutter on or off. When the shutter is off, the
shutter blades can be locked open or closed. The shutter is controlled by the SHE command in
the CONTINUOUS, CONTROL and TRIGGER modes of operation. When the camera is set to
LINE operation, the shutter is controlled by the command line MC2.
When the shutter is on, the exposure time is set by the exposure command for both the
CONTINUOUS and TRIGGER modes of operation. When the camera is operated in the
CONTROL mode, the exposure lasts for as long as the EXPOSE input to the camera is “true”.
In general, the shutter should be turned off with the blades open if you are working in a darkened
area with a light source that is flashed. The camera is always gathering light even as an image is
being read from the sensor. If there is light on the subject between exposures, the shutter should
be used to prevent image smear. If you need to acquire a dark current frame, turn the shutter off
with the blades closed and transfer a frame.
TYPE IN: RESPONSE EXPLANATION
SHE xx CR-LF Enables or disables the shutter as determined by the
argument ON, FO, or FC.
SHE? Queries the current shutter setting.
SHE xx Means the shutter is enabled or disabled as indicated.
Sample commands with arguments:
SHE ON Enables the Shutter.
SHE FO Disables the Shutter and locks it in the open position.
SHE FC Disables the Shutter and locks it in the closed position.
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3.6 Exposure
This command sets the exposure time of the camera in increments of one millisecond. The
exposure times can be any value between one millisecond and one hundred seconds. This
exposure time setting affects the CONTINUOUS and TRIGGER modes only. The camera
produces the most uniform picture when the exposure time is between 50 and 200 milliseconds.
The maximum frame rate is directly related to exposure time. The maximum frame rate with the
exposure set for 10 milliseconds is 5.9 frames per second. For an exposure time of 500
milliseconds, the fastest frame rate becomes 1.5 frames per second.
Frame Rate = 1/(145 milliseconds + exposure time + shutter transition time)
When your application involves low light levels and a subject that is not moving, exposure times
of more than one second may be necessary. As you push the exposure time beyond one
second, you may notice that image quality deteriorates. This is caused by sensor dark current
accumulating over time. The CONTROL mode allows you to extend the exposure time beyond
100 seconds, but you should understand that picture quality degrades with the longer exposure
times.
TYPE IN: RESPONSE EXPLANATION
EXE xxxxxx CR-LF Sets the exposure in one millisecond increments
using the argument with a range from 1 to 100000.
EXE? Queries the current Exposure setting.
EXE xxxxxx Means the exposure is set as indicated.
Sample commands with arguments:
EXE 1 Sets the Exposure to one millisecond.
EXE 100000 Sets the Exposure to one hundred thousand milliseconds (100 seconds).
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