TB0339A Page 6 of 9 10/18/03
Power Switch/PA Volume
PA
VOL
PWR
OFF
Function Switch
P
Y
H
PA and Siren Button
SIREN
OPERATION
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)
SIREN CONTROLS
The combined power switch and volume control give power to the hand control and
adjust the PA volume. Power is turned OFF by rotating the control counterclockwise
until it “clicks”. Power is turned ON and increased PA volume by rotating clockwise.
The power switch should be turned off when vehicle is not being used to conserve
battery power.
The Rotary Function Switch selects various siren operating modes.
These modes are as follows:
Phaser: The siren produces a very fast warble tone. This mode may be used at
intersections or in highly congested areas. Horn and PA override
available in this mode.
Note that Phaser is replaced with Horn on SC-550-84 model or Two Tone
on SC-550-85 model.
Yelp: The siren produces a moderate warble tone. This mode may be used in
lightly congested areas. Horn and PA override available in this mode.
Wail: The siren produces a normal rise-fall tone pattern. This mode may be used on highways or areas with
constant traffic flow. Yelp and PA override available in this mode.
Manual: The siren rise-fall tone is controlled manually with the Siren button. PA override available in this mode.
Horn: Also considered a standby mode. Horn and PA override available in this mode.
Radio: This mode reproduces, or repeats, the output of a radio. The radio must be connected and the RADIO
VOLUME adjusted. PA override available in this mode.
The following OVERRIDE FUNCTIONS are available for certain modes.
PA: By pressing the microphone PTT (Push to Talk) switch on the side of the
hand control, the siren will change to a PA (Public Address) amplifier. The
siren mode resumes when the PTT is released. Adjust the PA Volume and
hold the MIC close to your lips for proper operation. PA override is
available in all modes.
Horn: By momentarily pressing the Siren button or activating the auxiliary siren input, the HORN tone is
produced. The siren mode resumes when released. Horn override is available in all modes except Radio
and Wail.
Yelp: Only available in Wail mode. By momentarily pressing the Siren button or activating the auxiliary siren
input, the siren output is toggled between Wail and Yelp tone.
(16 Seiten)
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