TB0335B Page 6 of 10 10/18/03
NORMAL OPERATION (Dual Mode Switch Off)
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)
HRN/TTHRN/TT
MANMAN
WAILWAIL
YELPYELP
PHASR/WPHASR/W--YY
SIRENSIREN
VOL
POWERPOWER
OFF/ON
The Toggle Power Switch controls the siren power. The siren may be left on any time the vehicle is in
operation. The power should be turned off when vehicle is not being used to conserve battery power.
The Rotary Function Switch selects various operating modes. These modes are as follows:
RADIO - This mode reproduces, or repeats, the output of a radio. The radio must be connected and
RADIO VOLUME ADJUSTed for this mode to function. PA override available in this mode.
HORN - Also considered a standby mode. Horn and PA Override available in this mode.
MAN - The siren tone is controlled Manually with SIREN button. PA Override available in this mode.
WAIL - The siren produces a normal rise-fall tone pattern. This mode should be used on highways or
areas with constant traffic flow. Yelp and PA Override available in this mode.
YELP - The siren produces a moderate warble tone. This mode should be used in lightly congested
areas. Horn and PA Override available in this mode.
PHASER - The siren produces a very fast warble tone. This mode should be used at intersections or in
highly congested areas. Horn and PA Override available in this mode.
OVERRIDE FUNCTIONS (Normal Mode)
PUBLIC ADDRESS
(PA) OVERRIDE - Pressing the microphone button in any operating mode allows the operator to use the siren as
a public address amplifier. The operating mode resumes when the button is released. (Hold
the microphone close to your lips for proper operation and adjust the PA VOLume Control)
HORN OVERRIDE - By pressing the SIREN button the siren tone output is replaced by the horn tone. The siren
tone resumes when the button is released. (This feature is not available in WAIL mode.)
YELP OVERRIDE - Available only in WAIL mode. By momentarily pressing the SIREN button the tone output is
switched to the Yelp tone. Pressing the button again switches the tone output back to Wail.
RADIO VOLUME ADJUST
The RADIO VOLUME ADJUST is a one time setting which depends on the radio connected and its normal volume.
Access the RADIO VOLUME ADJUST through a hole on the side of the amplifier.
Switch siren to RADIO mode and turn on the power. With the volume on the radio itself set to normal level, set the
RADIO VOLUME ADJUST to the desired level.
(7 pages)
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