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4-1. GENERAL
All controls utilized during normal operation of
the Model PA4000 are located on the Control Head
(see figure 4-1).
4-2. SELECTOR SWITCH
The Selector switch is a five-position rotary switch
used to select the mode of operation. The following
are positions on the Selector switch.
A.
RADIO
In this position, incoming radio messages are
amplified by the siren and rebroadcast over the
outside speaker.
B.
MAN
In this position, it is possible to operate the siren
by activating the AIR HORN/MANUAL paddle
switch. The siren can also be activated by means
of an auxiliary switch, such as the horn ring button
(refer to paragraph 4-6).
C.
WAIL
In this position, the siren produces a continuous
“wailing” sound , up and down in frequency.
D.
YELP
In this position, a continuous rapid “warbled” tone
is generated.
E.
PRIORITY (HI-LO)
In this position, a continuous extremely rapid
“warbled” tone or an alternating HI-LO tone is
generated.
NOTE:
Pressing the microphone push-to-talk
switch will override any function and provide
instant public address operation.
4-3. HORN RING SWITCH
The horn ring switch determines the function of the
vehicle horn ring.
1. In the center position, the vehicle’s horn will
sound. Both red LEDs are extinguished.
2. In the left (SIREN) position, the red LED on
the left is illuminated. Pressing the vehicle’s
horn ring activates the Tap II function and
changes the audible siren sound. The vehicle
horn will not sound.
3. In the right (A/H) position, the red LED on the
right is illuminated. Pressing the vehicle’s horn
ring will sound the air horn tone. The vehicle
horn will not sound.
4-4. AIR HORN/MANUAL SIREN SWITCH
The AIR HORN/MANUAL switch activates the
electronic air horn sound (up) in any selected
position, except RADIO, and the peak-and-hold
sound (down) in the MAN position.
4-5. TAP II FUNCTIONS
Tap II allows the driver to change the audible siren
sound via the vehicle’s horn ring. This feature is
especially effective for clearing traffic. The chart
below demonstrates how the horn ring can be used
to change the siren sound.
TAP II FUNCTIONS
Selector
First Horn
Second Horn
Switch
Ring Tap
Ring Tap
Position
Produces
Produces
Wail
Yelp
Wail
Yelp
Priority (HI-LO)
Yelp
4-6. PRESS-AND-HOLD FUNCTION
NOTE:
For the press and hold functions to operate
with the horn ring, the Control Head horn ring
switch must be in the SIREN position.
Additional alternate sounds can be activated when
the Selector switch is set to MAN or PRTY. While
depressing and holding the horn ring and the
Selector switch set to MAN, peak-and-hold siren
will sound. In the PRTY position, the air horn will
sound. Releasing the horn ring will cause the siren
to revert back to the original function.
MAN
RAD
SPKR TEST
FEDERAL SIGNAL CORPORATION
WAIL
PRTY
YELP
290A2925
L
R
A/H
SIREN
HORN RING
AIR HORN
MANUAL
Figure 4-1. PA4000 Control Head.
