American Dynamics 1461 - Manual (Page 8)

OPERATION
Setup
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.
6) Ensure that the AUTO RESET switch is in the deactive
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 This is the
normal operating mode. In this mode the unit
automatically resets 12 seconds after detected motion
ceases.
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
can be used.
If the motion detector is used on a critical area during a non-
critical 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.
DETECTION AREA
Figure 4 On-Screen Display
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