Page 6 of 8 SA-400-10 Installation and Operating Instructions
06/06/05 CP4825C
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 6-position rotary selector switch controls the primary operat-
ing function of the siren.
Phaser - A very rapidly changing tone used at intersections or in
highly congested areas. Can be optionally disabled or replaced
with Two-Tone.
Yelp - A rapidly changing tone used in congested areas.
Wail - A slower changing tone used on highways.
Man - Or Manual, the siren tone is controlled manually by the
Siren button or auxiliary input.
Horn - A standby mode that allows Horn Override.
Radio - Also known as Radio Repeat, this function amplifies a
radio speaker input for re-broadcast outside the vehicle. No
siren tones or PA operation are available in this position.
SIREN SWITCH
This momentary push-button switch provides various control functions in
conjunction with the Selector Switch. These functions are manual tone con-
trol in the Manual position, Horn Override in the Phaser, Yelp and Horn posi-
tions, and Yelp Toggle Override in the Wail position. It can optionally control
Horn Ring Cycler 2 operation in the Horn position if HRC2 option is selected.
MICROPHONE (PA Override)
The attached noise-canceling microphone is used for public address operation and overrides any
siren tone when the button on the side is pressed.
PA VOL
This control adjusts the PA volume. With the vehicle parked, set the PA volume
to the maximum level with no feedback (squeal).
AUXILIARY INPUT
During installation an auxiliary input may be connected to the horn ring or other switching device.
It provides the same operation as pressing the Siren button.
RADIO VOLUME
The radio repeat volume level is set using an adjustment inside the case
just behind the PA volume control. Press on the rear of the case to open
the unit, then set the Selector Switch to the Radio position and turn on
the power. With the radio volume set to normal level, adjust the siren
radio repeat control to the desired level. Turn off power and press the
unit back into the case.
HORN RING CYCLER 2 (Optional)
During installation, the auxiliary input may be connected to the horn ring or other switching device,
and the HRC option selected. With the Selector Switch set to the Horn position, tap the horn ring
to bring the unit out of standby into Wail tone. Repeatedly tapping the horn ring will cycle through
Wail, Yelp, and Phaser tones. Tapping the horn ring twice quickly will stop the siren tones and
return the unit to standby. Pressing and holding the horn ring will produce Horn tone until re-
leased. Then the siren will return to its previous siren tone or standby.
NOTE: Earlier units with S/N lower than 04190000 have a different version of HRC. In this case
the siren tones cycle through Standby, Wail, Yelp, and Phaser. The tone is stopped by cycling to
Standby.
RADIO
HORN
MAN
WAIL
YELP
PHASER
SIREN
PA
VOL
RADIO ADJUST
Sound Hazard
- Sound level from siren speaker (>120dBA @ 10 feet) may cause hearing damage.
Do not operate siren without adequate hearing protection for you and anyone in immediate vicinity.
(Ref. OSHA 1910.95 for occupational noise exposure guidelines)
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