Page 8
POWER SWITCH
This switch has two positions: Down / Off
and Up / On. When this switch is Off, the
unit will not function. When the switch is
On, the siren is functional and may be
activated at the operator’s discretion.
NOTE: If this unit is connected to the
vehicle’s horn ring circuit, the vehicle horn
is disabled when the power switch is in
the ON position.
ROTARY SWITCH
The Rotary Knob control siren and PA
(Public Address) functions. There are 7
positions that may be selected. Each
position and it’s function is outlined under
“Rotary Switch Operations”.
VOLUME KNOB
The Volume Knob controls the volume of
Public Address function. Volume is
increased by rotating the knob in a
clockwise direction. Rotating the volume
knob in a counter-clockwise direction
decreases the volume produced by these
features. The volume knob has no effect
on any siren tones produced.
RADIO REPEAT VOLUME
Before use, the Radio Repeat output
volume must be adjusted to satisfactory
operating levels. To adjust this level, a
small, flat-blade screwdriver needed.
Locate the Radio Repeat adjustment port
(potentiometer) to the right of the Rotary
Knob on the face of the control head. Set
the volume level of the vehicle’s two-way
radio to its normal operating volume. Turn
the Rotary Knob on the control head to
RAD to activate Radio Repeat. Insert the
screwdriver in the Radio Repeat
adjustment port and turn in clockwise
direction to increase the sound level.
MAN BUTTON
The Manual button generates a variety of
tones, depending on what position the
rotary knob is in. For further explanation
of this button’s function, refer to Rotary
Switch Operations.
SI TEST
®
& DIAGNOSTIC
INDICATORS
SI TEST
is a diagnostic feature that
allows the operator to confirm the proper
operation of the siren speakers
connected to the unit without activating
an audible siren tone. To initiate SI TEST
cycle, set the rotary knob to the RAD
position. Now press and release the
MAN button. As the siren is tested, its
diagnostic indicator will turn on steady for
about 1.5 seconds if no problems are
detected. If the indicator flashes, or does
not light at all, a problem with either the
siren, speakers, or wiring has been
detected. Check the wire connections of
the failed speaker and repeat the SI
TEST. If the speaker fails to test again,
have the siren itself inspected by a
qualified technician.
NOTE: Installed
speakers are tested by generating an
ultra-high frequency tone through each
speaker. Although these tones are
inaudible to humans, be sure that there is
nobody within 5 feet of the speakers
when SI TEST
is running.
HORN BUTTON
Holding the HORN button on, generates
an AIRHORN tone whenever the siren is
powered up.
MA
PA
RAD
RAD
PWR
MAN
HF WAIL
YELP
T3
PA
RAD
RAD
MAN
HORN
AKERS
2
MAN
PA
RAD
RAD
PWR
MAN
YELP
T3
HORN
ELP
T3
SPEAKERS
2
1
HORN
MAN
YELP
T3
HORN
SPEAKERS
2
1
Siren Operations:
