Code 3 Motorcycle Sirens 3951, 3955 - Manual (Page 8)

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AIR HORN, Momentary Push-button 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.
RRB Switch - The RRB switch, is used to enable or disable the Radio Rebroadcast (RRB) function. When
RRB is enabled, all other siren functions except PA are disabled.
When the switch is on, the 2-way radio audio connected to the RRB input wires is routed through the siren
amplifier to the siren speaker. The RRB volume from the siren speaker may be set by adjusting the 2-way
radio's volume control. Also refer to Maximum Radio Rebroadcast (RRB) Adjustment under the SET-UP AND
ADJUSTMENT section.
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.
INTERCLEAR - The InterClear output provides a timed output from the siren which can be used to activate a
special warning light or function. Each time the siren mode is changed by any of the means previously
described the InterClear output switches on (+12VDC, 1A Max) for approximately eight (8) seconds. Turning
the siren off will also turn the InterClear output off. Use Code 3 power booster kit (p/n INTBS) for
applications requiring more than 1A on the InterClear output.
!
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.