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OPERATION
GENERAL
This unit is designed for easy operation under the stress associated with high-
speed pursuit. Most siren functions are accessible with one simple motion without
repetitive activation of switches or automatic timed switching that can interfere with
desired operation.
SELECTOR SWITCH
The three-position rocker switch on the left controls the primary operating
function of the siren.
WAIL - A normal rise-fall tone used on highways and areas with low traffic
or constant traffic flow.
YELP - A rapid warble tone used in light to moderately congested areas.
OFF - (Manual/Standby) - A silent mode that allows push-button Horn and
push-button Manual (MAN). The siren output winds down when the
Manual push-button switch is released.
Manual
With the left selector switch in the OFF position, the Manual side of the
momentary switch provides a manually activated Wail siren tone. While the
selector switch is in the Wail or Yelp position, this switch provides a generally
quicker changing tone. (See table on next page). These quicker tones are used to
momentarily alert motorists at intersections and very highly congested areas.
Pressing the button once changes to the next faster tone. Pressing the Manual
button again will toggle the siren back to the original tone.
Optional configuration allows disabling of the Thunder tone entirely. This option
is selected during installation and may be governed by State or Local laws.
(Refer to the INSTALLER SELECTABLE OPTIONS section on pages 2 & 3).
Horn
This momentary push-button switch provides a simulated air-horn tone while
pressed. This can be used to either replace, or to supplement the normal
vehicle horn and is useful at intersections or in low noise areas. This tone will
override all other siren tones.
MOUNTING
SAFETY PRECAUTIONS
For the safety of the installer, vehicle operator, passengers and the community
please observe the following safety precautions. Failure to follow all safety
precautions and instructions may result in property damage, injury or death.
AMPLIFIER
The ST105 siren may be mounted above the dash, below the dash, on a
tunnel, or in a rack with the mounting u-bracket provided. Choose a
mounting location convenient to the operator and away from any air bag
deployment areas. Inspect behind mounting area for clearance. Assure
adequate ventilation to prevent overheating. Consider wire routing and
access to connections. Install mounting bracket to vehicle using 1/4"
hardware (not supplied).
ELECTRICAL CONNECTIONS
AMPLIFIER
Electrical power connections to the amplifier are made using a removable
connector located on the back of the amplifier case. You should make all electrical
connections to the power connector before installing the connector on the unit. If
the unit needs service, the power connector can be easily removed without unwiring
the connector.
The power supply of the unit must be capable of delivering peak currents up to
30 amps for adequate short circuit protection and reliable operation. The preferred
source is directly at the vehicle battery. The unit is internally fused. A wiring
diagram on page 6 shows detail of how to wire the power connector on the amplifier
to the vehicle.
DO NOT mount in air bag deployment area.
Devices should be mounted only in locations listed in SAE standard J1849.
Controls should be placed within convenient reach of the driver.
Assure clearances before drilling in vehicle.
Sound levels produced by attached speakers can cause permanent hearing loss.
Never operate this unit without adequate hearing protection for you and
others in the area. (OSHA 1910.95)
15 Amp Fuse
Power Connector
-- 15 --
(16 pages)
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