Operating instructions
SC-1002 / 1012 / 1022-10 Ver. B  Installation Instructions  Page 13 of 16 
CP5028A  03/11/10 
OPERATION (continued) 
SC-1022 Model 
POWER ON/OFF 
The unit is normally turned on with ignition switch on the vehicle. See INSTALLATION section. 
The POWER light on remote amplifier will turn on. The hand control will also be backlit. 
SIREN CONTROLS 
MECH, WAIL, YELP, AND PHSR PUSHBUTTON SWITCHES 
Four pushbutton switches control the primary operating mode of the siren. 
The primary operating modes are: 
Standby - A silent mode that may be overridden at any time. 
Mech - A simulated mechanical siren tone. Tone may be changed or disabled. See 
OPTION SWITCHES section. 
Wail - A slower changing tone used on highways. 
Yelp - A rapidly changing tone used in congested areas. 
Phaser - A very rapid changing tone used at intersections and very highly congested 
areas. May be optionally replaced with Two-Tone or disabled. Two-Tone is two 
alternating frequencies like a European HI-LO. See OPTION SWITCHES section. 
Momentarily press button to activate (lit red).  Momentarily press button again to de-activate. Also 
while a particular mode is activated, switch to a different mode by pressing one of the other three 
buttons. The unit is in Standby when NONE of the four buttons are activated (NOT lit red). For 
example starting with all four buttons off, press the Wail  button to turn on Wail. Now press the 
Yelp button to change to Yelp. Press the Yelp button again to turn off sound (return to Standby). 
When Mechanical or Wail is turned off the tone will die out.  Turn on Short Manual option to stop  
tone immediately. See OPTION SWITCHES section. 
MAN PUSHBUTTON SWITCH 
Provides manual control of siren tone depending on the primary operating mode selected. 
While in Standby, the Manual  button controls the Mechanical tone. Rising to peak while pressed 
then falling until die out when released. May be optionally replaced with manual Wail tone. 
See OPTION SWITCHES section. 
While in Mech, Wail, Yelp, or Phaser mode, pressing the Manual  button causes tone to rise and 
peak then resume when released. 
HORN PUSHBUTTON SWITCH 
Produces a simulated Air-Horn tone while pressed.  Overrides all siren modes. Horn tone may be 
disabled. See OPTION SWITCHES section. 
AUXILIARY INPUT FUNCTIONS 
The switch or horn ring attached is intended to be momentary. While in Mech, Wail, Yelp, or 
Phaser mode, activating auxiliary will produce Horn tone. While in Standby, activating auxiliary 
will normally produce Horn tone. Different tones are available. See OPTION SWITCHES section. 
Horn Ring Cycler 2 (HRC2) - this feature may also be added. See description on Page 11. 
LIGHT CONTROLS 
LT1 and LT2 PUSHBUTTON SWITCHES 
Momentarily push button to activate (will light red) corresponding light output. 
Momentarily push button again to de-activate corresponding light output. 
Primary Mode 
and Tone 
MAN 
Button 
HORN 
Button 
Auxiliary Input 
(Horn Ring) 
Standby (Silent)  M. Mech or M. Wail  Horn  Horn, M. Mech., M. Wail, or HRC2 
Mechanical  Man. Mech. Rise  Horn  Horn 
Wail, Yelp, or Phaser  Man. Wail Rise  Horn  Horn 
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) 
SC-1022
MAN
LT1
MECH
YELP
HORN
LT2
WAIL
PHSR










