American Dynamics 1461 User Manual

Model 1461

Single Channel

Motion Detector

Installation and Operating Instructions

The 1461 is an analog device for the detection of motion in the field of view of a TV camera. It is intended as an aid to personnel
engaged in monitoring a TV display and is not intended as a primary alarm input device.

The software/firmware furnished with this equipment is confidential to and is copyrighted by AMERICAN DYNAMICS. It is
not to be copied or disclosed in any manner without the express written consent of AMERICAN DYNAMICS. The
software/firmware is furnished to the purchaser under a license for use on a single system.

Note: Information furnished by AMERICAN DYNAMICS is believed to be accurate and reliable. However, no responsibility is

assumed by AMERICAN DYNAMICS. for its use; nor for any infringements of other rights of third parties which may result
from its use. No license is granted by implications or otherwise under any patent or patent rights of AMERICAN DYNAMICS.

= =- AMERXfAN

-=L-‘DYNRM/CS

The installation of this product should be made by qualified

service personnel and should conform to all local codes.

CAUTION: To reduce the risk of electric

shock, do not remove covers (or back).

No user-serviceable parts inside.

Refer servicing to qualified service personnel

WARNING

To reduce the risk of fire or shock hazard, do

not expose this product to rain or moisture.

Warning:

radio frequency energy and if not installed and used in accor-

dance

with the instruction manual, may cause interference to

radio communications.

ply with the limits for a Class A computing device pursuant

to

Part 15 of FCC Rules, which are designed to provide rea-

sonable protection against such interference whrn operated in

a commercial environment. Operation of this product in a
residential area is likely to cause interference in which case
the user at his own expense will be required to take

er

measures may be required to correct the interference

This product

It has been tested and found to

generatesuses,

and can radiate

com-

whatev-

symbol, within an equilateral triangle, is
intended to alert the user to the presence of

product’s enclosure that may he of suffi­cient magnitude to constitute a risk of elec­tric shock to persons.

The

exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and mainte-

t

l

n

nance (servicing) instructions in the
literature accompanying the product.

UNPACKING AND INSPECTION

Unpack carefully. This is an electronic product and
should be handled as such.

Compare the items

received with the packing list with your order.

Be sure to save:

1. The shipping cartons and insert pieces. They are the
safest material in which to make future shipments
of the product.

2. The IMPORTANT SAFEGUARDS sheet.

3. These Installation and Operating Instructions.

MAINTENANCE

User maintenance of this unit is limited to external
cleaning and inspection.

For specific

recommenda-

tions refer to the IMPORTANT SAFEGUARDS sheet
packaged with this product.

INSTALLATION AND SERVICE

If you require information during installation of this
product or if service seems necessary, contact the

Sensormatic Video Products Division at (619) 642-

2400. You must obtain a Return Authorization
Number and shipping instructions before returning any
product for service.

Do not attempt to service this product yourself.
Opening or removing covers may expose you to dan-
gerous voltages or other hazards. Refer all servicing to
qualified personnel.

QA30lD

Table of Contents

Product Description

Features

Installation

Connections

Operation

Appendix

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

................................................................................

Operating Controls
Setup
Normal Operation

System Considerations

............................................................................

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1

1

2

3

......................................................

.......................................................

...................................

............

3
4

.4

A

Typical System Connections

......................................

.C

DISPLAY BYPASS AUTO RESET

Figure 1 - 1461 Front Panel

DESCRIPTION

PRODUCT DESCRIPTION

The 1461 is an analog device for the detection of motion in the
field of view of a TV camera. It is intended as an aid to
personnel engaged in monitoring a TV display and is not
intended as a primary alarm input device.

INSTALLATION

Systems involving video motion detectors must use the best

possible connection and grounding practices. Poor wiring not

only causes poor pictures, but could affect the alert function.
Camera and lens selection, camera location, scene lighting, and

mounting are also significant factors in achieving optimum
Only standard video from a camera is required. No external
sync drives are necessary. The video input is passively looped

performance. These factors

Appendix, System Considerations.
to the output to allow the motion detector to be turned off with
no loss of video.

The successful operation of video motion detectors depends on
many factors. The section on SYSTEM CONSIDERATIONS

in the Appendix should be reviewed before finalizing a system.

.

Mounting

The 1461 switcher is supplied as a desk-top unit. Place the

unit in a position convenient for the operator, usually adjacent

to the monitor to be viewed. For rack mounting, 2117 Series

rack-mount kits are available. The 1461 is a quarter-rack unit.

Up to four quarter-rack units such as a 1461 or a 1404A

FEATURES

Sequential Switcher may be mounted in a single 19” by 1

rack. One or two may be mounted with half rack units such as

*

MULTIPLE ALERT ACTION

*

ADJUSTABLE

*

ADJUSTABLE SENSITIVITY

* AUTO-COMPENSATION FOR

DETECTION AREA

SLOW

LIGHT

LEVEL

the 1440B Date/Time Generator.

CHANGES

*

MANUAL OR AUTOMATIC RESET

*

FRONT PANEL CONTROL

are

covered in more detail in the

IF YOU ENCOUNTER ANY PROBLEMS

OPERATING THIS UNIT, OR NEED TECHNICAL

ASSISTANCE, CALL:

Sensormatic Video Products Division

6795 Flanders Drive

San Diego, CA 92121

314”

Tel: [phone]

Fax: [phone]

1

CONNECTIONS

12ov

60HZ

Figure 2 - 1461 Rear Panel

CONNECTIONS

Video Input

Connect a good grade of

to the VIDEO IN BNC Connector on the rear panel of the

1461. The 1461 has a passive loop-thru input.

terminate the input in 75 ohms. The video input cable should

be terminated in 75 ohms at the end of the run.

Video Output

Connect a good grade of

PUT

BNC connector on the rear panel of the 1461 to the video

input of the monitor or video switcher. This cable should be

terminated in 75 ohms, or if looped thru the monitor or

switcher, terminated at the end of the run.

.

Automatic Switcher Call-Up Connections

Connections to an external switcher are made at the
CONTROL connector on the rear panel of the 1461. Pin 2
provides a logic-level closure during an alert for remote call-up
of a switcher. A typical system connection for switcher call-up
is shown in the Appendix. The CONTROL connector pin
definitions are:

PIN1

PIN2
PIN3
PIN4
PIN5

Pin 1 is at the top of the connector, see Figure 2.

RG59/U

RG59AJ

Ground
Switcher Logic Out
Auxiliary Relay Contact
Auxiliary Relay Contact
No Connection

video cable from the camera

video cable from the VIDEO

It does not

CONTROL

0

Auxiliary Start Relay Connections

The

5-pin

CONTROL connector is also used to access a
normally open, SPST relay which can be used to activate a
VCR or other devices during an alert. The relay contacts
provide a closure between pins 3 and 4 when an alert condition

occurs.
SWITCH LINE VOLTAGES. The relay contact ratings are:

Power

The model number and rated power are shown on the rear
panel of each unit. No power On/Off switch is provided. The
LED on the front panel is lit when power is applied to the unit.

CAUTION: DO NOT USE THIS RELAY TO

Power: 10 VA max.

30

Voltage:
Current: 0.25 A DC or RMS max. (resistive load)

Model 1461 - 120 VAC, 60 Hz nominal. Insert the pendant

3-wire cord and plug into a mating power source.

Model

leads extending from the rear panel to the power source. A
separate chassis ground terminal is also provided.

Model 1461X - 230 VAC,

1461101 -

Red Wire with Fuse Holder - (+) (hot) lead.
Black Wire -

pendant 3-wire cord and plug into a mating power source.

VDC or RMS max.

13.5 V DC (11 to 18 VDC). Attach the

(-)

(ground) lead.

50/60

Hz nominal. Insert the

A mating

provides connections for the auxiliary start relay.

5-pin

plug is provided. Note that this plug also

2

-@+ -@+ -@+

DISPLAY BYPASS AUTO RESET

Figure 3 - 1461 Front Panel Controls

OPERATION

DISPLAY

Operating Controls

All operating controls are on the front panel of the 1461, as
shown in Figure 3.

Power ON LED

unit.

ALERT

motion has been detected, until turned off by AUTO RESET or
by a manual RST (Reset).

RST (Reset) Button

button restores the unit to the motion detection mode and stops
all alert signals. If the motion is still detected, the unit returns
immediately to the alert condition. The manual RST function
is available regardless of the AUTO RESET switch setting.

SENS (Sensitivity)

sensitivity of the active detection area. Clockwise rotation
increases sensitivity.

VERT (Vertical) P and S

controls adjust the vertical position and size of the rectangular

detection area. The P control adjusts the vertical position and

the S adjusts the vertical size of the area.

-

This LED is lit when power is applied to the

LEDs

-

These two

-

After an alert has been indicated this

-

This screwdriver control adjusts the

LEDs

flash alternately when

-

These recessed screwdriver

or deactivates
area of the picture in which motion is detected. (See Figure 4,
On-Screen Display, page 4.) It does not otherwise affect the
operation of the unit. The activated (+) position is normally
used unless public display of the area in which motion is being
detected is inadvisable.

BYPASS

(-)

the audio alert, the switcher call-up logic output and the

auxiliary start relay functions of the motion detector. It must

be in the activated

desired. The visual ALERT LED’s are not affected by the
position of the BYPASS switch. In the deactivated

position, when an alert occurs the LED’s flash, but the audio

signal, the switcher logic, and the relay are not active.

AUTO RESET

deactivates

When activated

12 seconds after motion ceases. When deactivated

manual RST must be used to clear an alert condition.

OPERATION

(+/-) -

This two position toggle switch activates (+)

(-)

display of the two vertical bars indicating the

(+/-) -

This toggle switch activates (+) or deactivates

(+)

position when these functions are

(+/-) -

This toggle switch activates (+) or

(-)

the automatic reset of the motion detector.

(+),

an alert condition automatically is cleared

(-),

(-)

the

HORIZ (Horizontal) P and

controls adjust the horizontal position and size of the
rectangular detection area. The P control adjusts the horizontal
position and the S adjusts the horizontal size of the area.

S -

These recessed screwdriver

3

OPERATION

4

Setup

1)

Apply power to the motion detector and associated

cameras, switchers, and monitors. It is normally better to
have power to auxiliary equipment, such as VCR’s, off

during initial setup.

2) If necessary, adjust the switcher to display the camera
video which is to be monitored by the motion detector.

3) Turn all three motion detector toggle switches to the

deactive (-) positions.

4) Turn the DISPLAY switch to active

(+).

Note the twin
vertical bars, as shown in Figure 4, On-Screen Display.
These bars define the rectangular area of the picture within
which motion is detected. The size of this area may be
adjusted using using the front panel screwdriver controls
for vertical (VERT) and horizontal (HORIZ) position (P)
and size (S). Set the sensitive area to cover the region of
the picture within which motion is to be detected.

5) Turn the BYPASS switch to active

(+).

This activates the

four alert functions. Motion in the sensitive area causes:

-

the visual ALERT LED’s to flash alternately,

-

the audio beeper to sound,

-

the auxiliary start relay contacts to close, and

-

the switcher logic output to go active low.

Normal Operation

During normal operation the motion detector should be set
with all toggle switches in the active (+) position. This
displays the detection area enclosed by twin vertical bars, arms
the four action indicators, and enables the auto reset. It allows
the operator to look away from the monitor yet readily locate
the detection area on the screen. Motion alerts will activate all
alert functions. The unit will automatically reset to the
detection mode 12 seconds after the detected motion ceases. If
the operator wishes to turn the alert indicators off and reset
sooner, the manual reset button

(RST)

can be used.

If the motion detector is used on a critical area during a non­critical time period, such as a doorway at quitting time, the
BYPASS switch may be set to the deactive

(-)

position. In this
mode the LED’s will flash, but the audio signal, the relay, and
the switcher logic will not activate.

6) Ensure that the AUTO RESET switch is in the deactive

‘X

position before proceeding with Step 7. This allows

(-)

sensitivity to be adjusted without the interference of an
automatic reset.

7) Sensitivity; the most critical adjustment, is adjusted using
the screwdriver control SENS. The setting should be low
enough to avoid false or unwanted alerts caused by normal
motions such as birds or blowing trees, but high enough to
detect motions of interest. The optimum setting is best
determined by experiment at the site at which the 1461 is to
be used. Start with the as-shipped, midrange setting.

Simulate anticipated motions which should and should not
cause an alert. If the results are unsatisfactory: raise (CW)
or lower (CCW) the sensitivity, reset the unit with the RST
button, and repeat the simulated activity until satisfactory
performance is obtained.

8) Turn the AUTO RESET switch to active
normal operating mode.

In this mode the unit

(+).

This is the

automatically resets 12 seconds after detected motion
ceases.

DETECTION AREA

Figure 4 - On-Screen Display

APPENDIX

SYSTEM CONSIDERATIONS

SYSTEM CONSIDERATIONS

Motion detectors operate on the principle that any change in
the scene from a camera is caused by some moving object.
They monitor the content of a camera scene within a sensitized

area and detect differences in the scene content in that area
from one TV frame to the next. Moving objects in the

sensitized area in the field of view cause video changes in that

area which, depending on the setting of the sensitivity, cause
alerts. However, particularly in outdoor installations, normal

motions such as blowing leaves, small animals, birds, or clouds

may cause unwanted alerts. Other factors such as instability

in the camera, rapid changes in light level caused by an

auto-

iris, jitter caused by camera interlace, or electrical noise signals

superimposed on the video signal by improper cabling or poor
grounding will also cause changes in the scene content and

produce false alerts. The sensitivity adjustment establishes the

amount of change in scene content that is required within the
sensitized area before the unit produces an alert. Reducing the
sensitivity will reduce unwanted or false alerts. However,
sensitivity to desired alert conditions is then also reduced.
Other important system considerations for achieving optimum
motion detector performance are discussed below:

Camera Selection

The 1461 may be used with both

2:l

interlace and random

interlace cameras. No external sync drive from the camera is

.:

required. These features are unusual in motion detector
systems.

Nevertheless, camera selection is very important. The selected
cameras should be electrically and mechanically stable,

low-

noise, high quality units for best performance.

In general, random interlace cameras will give a lower level of
performance than 2: 1 interlace cameras. Small disturbances of
the image are inherent with random scanning. These
disturbances may be interpreted by the motion detector as
object motions. Consequently, a unit using random interlace
cameras will require a slightly lower sensitivity setting to
minimize false alerts.

Lens Selection

magnifies objects in the scene but covers a smaller area. A
short focal length (wide-angle) lens covers a large overall

scene, but shrinks the apparent size of objects in the scene.

Motion detectors can be affected by lenses of either too

short

or too long a focal length.

A long focal length (telephoto) lens is often used outdoors to
view more distant areas. These lenses also magnify the effects
of camera motion.

When used, the camera must be stably
mounted. Avoid unsteady towers or poles. Telephoto lenses
also magnify the disturbances caused by atmospheric effects,
such as the image “swimming” seen when hot air currents
cause air density changes in the path between the camera and
the scene.

Image interruption by snow, rain, and fog is obviously more
frequent when the camera is very distant from the scene being
viewed. All these factors limit the total distance that can be
covered, the lens focal length and the utility of motion
detectors on outdoor scenes. They must be judged by the
installer after determining the operating environment for each
camera.

A short focal length (wide angle) lens is used where the
camera is close to the scene, and a greater field of view is
needed. Objects in the scene appear smaller on the monitor

and to the motion detector. Very small objects are more
difficult for the motion detector to sense. There is, therefore, a
limit to the coverage advantage of wide angle lenses.

The field of view and magnification of a given focal length

lens also depends on the image format (size) of the camera
tube. Tables or formulas are usually available from the camera
or lens supplier.

These factors can affect the number of cameras needed in a
given installation. They should be determined by calculation

or experiment during the initial design of the video system.

Lens Aperture - The aperture (f-number) of a lens is a measure

of the maximum lens opening available to pass light to the
camera. It is thus also a measure of the relative performance
of a camera/lens combination at low light levels. Low light
level performance is affected by the camera type. Large

apertures are indicated by small f-numbers (for example,
f/l

.4).

Video motion detector systems are affected primarily by three
lens parameters: Focal length, Aperture, and Iris Control
Method.

Focal Leneth - The focal length of a lens directly affects the

apparent size of objects as seen on the monitor and by the
motion detector, Focal length also affects the overall field of
view of the camera. A long focal length (telephoto) lens

A

As the light level on a scene drops, the possibility of both
increased picture noise and reduced video signal increases.
Increased picture noise, especially low frequency noise,
increases the probability of false alerts and may necessitate a
reduction of the sensitivity setting. Reduced video signal
directly reduces the apparent sensitivity of the motion detector.
These factors ultimately limit the degree of scene darkness at

which the motion detector will operate.

SYSTEM CONSIDERATIONS

The performance of various camera-lens combinations at
different light levels may be obtained from the manufacturer’s
data. For optimum performance, the 1461 requires a
moderately noise-free video signal at industry standard voltage
levels. The camera-lens combination should be selected more
conservatively than is normal in installation not using motion
detectors.

Iris Control Method - Some auto-iris lenses, exhibit

characteristics requiring special consideration when used with

video motion detectors. With these lens, large light or dark

objects, moving in the field of view, near but outside the
sensitive window area of the motion detector, may open or
close the lens rapidly enough to cause undesired alerts.

When such a lens is used, the camera placement must be such

that normal movements in the scene do not cause the auto-iris

to open or close rapidly. This can usuahy be accomplished by

ensuring that there are no light areas of the scene which could

be blocked by permissible movements. Mounting the camera
high enough to obtain a neutral scene background will usually

suffice.

The automatic iris lens should be adjusted for “average”, rather

than “peak’ response to avoid over-reaction of the lens to very

small bright objects. When adjustable, the time delay of the

auto-iris should be set as long as possible, to avoid short

transient reactions of the iris to brief light changes.

-Some auto-iris lenses are subject to “hunting” (a tendency to

continuously open and close a

small

amount while searching
for the optimum iris aperture). This effect is often visible in
the image as a slowly pulsating overall brightness of the

monitor image: The 1461 will tolerate a small amount of lens

hunting. Excessive hunting usually indicates a problem with
the iris control mechanism which should be corrected.

A target may move so slowly that its motion is not perceived
by the unit. A longer focal length lens magnifies both size and
apparent speed of motion.

A target may move through the scene so rapidly that its
presence is missed by the camera, and thus by the system.
This condition is very unusual but may often be corrected by
camera positioning and lens selection.

In any given installation, these factors should be determined
during installation planning. If necessary experiments under
actual operating conditions should be conducted.

False Alerts and Misses

Common causes of excessive false alerts are: sensitivity
control set too high, loose or defective coaxial video
connectors or cables, spurious moving objects or lights in the
camera field of view, camera ALC setting too high, unnoticed
shadows, flickering fluorescent lights, etc.

Common causes of excessive misses are: sensitivity control set
too low, object in motion is too fast or too slow, object in
motion is too small to effect sufficient video change, etc.

If false alerts and misses continue to be a problem, the entire
installation should be reexamined. Installation changes to
improve performance may be possible. Such changes may
include: relocation of the camera, change of lens, change of
lighting, or addition at different locations of other cameras and

motion detectors to cover a wider variety of motions.

Detectable Targets

The detectability of a moving object is determined by its size,
contrast with the background, and speed of motion. Once an

object appears larger than approximately 3% of the monitor
screen dimension, or 0.1% of the screen area, its detectability
will not increase greatly. Therefore, the best trade-off of area
coverage against sensitivity occurs when the lens and camera
position are selected to give this size for objects of interest.
When maximum detection probability is desired a slightly
longer focal length lens may be used.

In order to detect an object it must have some

visual

contrast
with the scene background. Contrast may be enhanced by
improved lighting and by positioning the camera so that the
targets appear against a background of contrasting color. For
most targets, a light background provides the highest contrast.

B

TYPICAL SYSTEM CONNECTIONS

1461 Motion Detectors to 1408A Switcher

CAMERA 4

CAMERA

1461 MOTION DETECTORS

IN

30

1

m

OUT

CONTROL

5

:

.
.

-.

---L

1

L

-I

oc

) 0

-

-

Lozal

REMOTE START

Local VCR

NOTE: Impedance of local
VCR and MONITOR must
be set to HI-Z

MONITOR

lo 0 0

MONITOR

01

1408A

SWITCHER

REMOTE START

TIME-LAPSE VCR

SPECIFICATIONS

Voltage Supply:

1461 - 120 VAC,
1461101 - 13.5 VDC (11 to 18 V) ­1461X - 230 VAC,

Power: 3 watts

Aux Relay Contacts:

Power - 10 VA max
Voltage - 30 VDC or RMS max

Current -

0.25 Amps DC or RMS max. (resistive load)

50/60

50/60

Hz

Hz

3/8

Amp Slo-Blo fuse

Video Input:

Sensing Area:

Minimum - 0.8% of Scanned Area
Maximum - 90% of Scanned Area

Size:

Weight:

1.75” H x 4.3” W x 7.2” D (45 x 110 x 183 mm)

1.8 lbs (0.8 kg)

Passive looping, 525 line, 60 Hz
“X” Models are 625 line, 50 Hz

-

OP1461C

May 1996

Designed and built by

AMERICAN DYNAMICS

10 Corporate Drive

Orangeburg, New York 10962

Service Center: 619-642-2400

FAX:

619-642-2440

Printed in USA