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Operation
Wail/Off/Yelp Switch
This is the 3-position button used for basic operation of the siren. While in the Wail or
Yelp positions the siren will produce the tone programmed for that function (see previous
page). The Wail and Yelp functions are defaulted for the Wail and Yelp tones.
Wail Tone: A normal rise-fall tone used on highways and areas with low traffic or constant
traffic flow.
Yelp Tone: A rapid warble tone used in light to moderately congested areas.
Center Off Position: (Manual/Standby) - A silent mode that allows momentary
push-button activation of the Manual and Horn functions.
Manual Button
With the Wail/Off/Yelp button in the Off position (unit powered up but not producing any
siren tones): Pressing the momentary Manual push button switch will provide a manually
rising and falling siren tone while being pressed. The siren output winds down when the
Manual momentary switch is released.
With the Wail or Yelp mode selected: Pressing the Manual button will “step” the siren up to
the next button’s programmed tone:
(WailYelpYelp Step Up)
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, reverts the siren back to the original tone.
(See previous page to program optional tones.)
Horn Button
This momentary push button switch provides a simulated air-horn tone while pressed. It is
useful at intersections or in high noise areas. This tone will override all other siren tones.
(See previous page to program optional tones.)
Auxiliary Function (AUX Wire) and Hands Free Cycler Mode
Note: Requires connection of the AUX wire (see page 4).
The AUX wire is typically connected to the vehicle horn switch. See page 5 to select either
positive (+12VDC) or negative (ground) activation.
Normally when the unit is on and in any mode, activating the AUX wire (i.e. pressing the
vehicle’s horn) will produce the programmed Air Horn tone (see previous page to program
optional Air Horn tones).
If you enable Hands Free Cycler mode using DIP switch #2 as shown on page 5, pressing
the vehicle’s horn continuously for 3 seconds will activate the Hands Free Cycler mode.
This mode allows you to use the vehicle’s horn to cycle through the siren tones associated
with the following functions:
(WailYelpYelp Step UpSilent)
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