Code 3 Motorcycle Sirens 3951, 3955 - Manual (Page 21)

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Set-Up and Adjustment
The only adjustment necessary for the 3955 siren is the P.A. Volume Adjustment (accessible from the front of
the unit) Make this adjustment prior to securing the unit .
P.A. Volume Adjustment - This control is accessible by lifting the water resistant cover ( located on the end
of the siren opposite the connector) and sets the maximum level of the P.A. volume. While keying the
microphone hold the microphone close to your lips and speak directly into it in a normal voice and adjust the
control until the P.A. volume out of the speaker is at the desired level and produces no feedback. Be certain
that the spring loaded water resistant cover is fully closed after you have completed this adjustment.
Operation
WAIL, Switch - Produces the Wail tone continuously while this switch is in the ON position.
AIR HORN, Switch - Produces the Air Horn tone. If the siren is active in any mode, it reverts to that previous mode
when the AIR HORN button is released.
PUBLIC ADDRESS (PA) - The PA portion of the siren is activated each time the motorcycle Push-to-Talk (PTT)
button is pressed while the user supplied common microphone interface is set to PA mode. While the PTT
button is pressed, the PA function overrides any active siren tone and routes the PA audio through the siren
speaker. When the PTT button is released, the siren will automatically switch back to the siren tone (if any)
that was active when the button was pressed. Also refer to the Maximum P.A. Volume Adjustment procedure
under the SET-UP AND ADJUSTMENT section.
!
Any electronic device may create or be affected by electromagnetic interference.
After installation of any electronic device, operate all equipment simultaneously to
insure that operation is free of interference.
!
WARNING!
IMPORTANT WARNINGS TO USERS OF SIRENS: "Wail" and "Yelp" tones are in some
cases (such as in the state of California) the only recognized siren tones for calling for
the right of way. Ancillary tones such as "Air Horn", "Hi-Lo", "Hyperyelp", and "Hyperlo"
in some cases do not provide as high a sound pressure level. It is recommended that
these tones be used in a secondary mode to alert motorists to the presence of multiple
emergency vehicles or to momentarily shift from the primary tone as an indication of the
imminent presence of an emergency vehicle.