Whelen 295HFSA7 - Manual (Page 5)

Page 5
Rotary Switch Operations:
Note: This section assumes the horn ring circuit has been wired as
shown on Page 4.
RAD (Radio Repeat) - When the rotary knob is in the RAD position, any
signal that is received by the vehicle’s two-way radio will be
simultaneously broadcast over the vehicle’s loudspeaker (unit must be
connected to the two-way radio as outlined in this manual).
With the Rotary Switch in the RAD Position:
• Activating the HORN RING will activate the VEHICLE HORN until the
HORN RING is released.
• Pressing the AIRHORN button will result in an AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button results in the AIRHORN tone until the MAN
button is released.
STDBY (Manual Siren) - When the rotary switch is in this position the
siren is in a standby state where no tones have been activated, but is
waiting for another action to be taken by the operator. This position is often
the best choice when manual operation of the siren is desired.
With the Rotary Switch in the STDBY Position:
• Activating the HORN RING will produce a AIR HORN tone until the
HORN RING input is released.
• Pressing the AIRHORN button will result in the AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button will result in the Manual Wail tone ramping up
to peak frequency and ramping down when the MAN button is released.
MAN (Manual Siren) - When the rotary switch is in this position the siren
is in a standby state where no tones have been activated, but is waiting for
another action to be taken by the operator. This position is used when
manual operation of the siren is desired.
With the Rotary Switch in the MAN Position:
• Activating the HORN RING will result in a Manual Wail tone ramping up
to the peak frequency and stopping when the HORN RING input is
released.
• Pressing the AIRHORN button produces an AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button has the same effect as pressing the HORN
RING.
HF (Hands-Free Operation) - When the rotary knob is in the HF position,
the siren functions are placed in a standby mode. Siren tones are
activated by a single “tap” on the MAN button or on the vehicle’s steering
wheel horn ring (if the vehicle’s horn has been wired to the HORN RING
input). The first tap produces Wail. A second tap produces Yelp. A third tap
produces Tone 3. The next tap returns the siren to Wail and the cycle
repeats itself. Two quick successive taps will stop the siren (refer to the
tables on the following pages for hands-free tonal information).
With the Rotary Switch in the HF Position:
• Activating the HORN RING will result in the HF cycle as described
above.
• Pressing the AIRHORN button will result in the AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button will result in the HF cycle as described above.
WAIL (Wail Tone) - When the rotary knob is in the WAIL position, a
steady, rise and fall wail tone is produced.
With the Rotary Switch in the WAIL Position:
• Activating the HORN RING will change the siren tone to the override
tone. Activating the HORN RING a second time returns it back to a
WAIL.
• Pressing the AIRHORN button will result in an AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button will change the siren tone to the override tone.
Pressing the MAN button again returns it back to a WAIL.
YELP (Yelp Tone) - When the rotary knob is in the YELP position, a fast,
rise and fall tone is produced.
With the Rotary Switch in the YELP Position:
• Activating the HORN RING will change the siren tone to the override
tone. Activating the HORN RING a second time returns it back to a
YELP tone.
• Pressing the AIRHORN button will result in the AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button will change the siren tone to the override tone.
Pressing the MAN button a second time returns it back to a YELP tone.
T3 (Piercer TM Tone (see dip switch tables)) - When the rotary knob is in
the T3 position, an extremely fast, rise and fall tone is produced.
With the Rotary Switch in the T3 Position:
• Activating the HORN RING will produce the override tone until the
HORN RING is released.
• Pressing the AIRHORN button will result in an AIRHORN tone until the
AIRHORN button is released.
• Pressing the MAN button will produce the override tone until the MAN
button is released.
Refer to the siren tables on the following pages for override tone
details.
MICROPHONE - Whenever the unit is powered on, activating the
microphone (pressing the switch on the side of the mic.) will shut down
any other siren functions & enable public address operation regardless of
the rotary switch position or any other switch or input.
Operating the Controls:
Power Switch (1)
This switch has three positions. Center (Off), Down (On/Mono) & Up (On/Stereo).
When this switch is Off, the unit will not function. When the switch is in either On
position, the siren is functional and may be activated at the operator’s discretion.
Rotary Knob (2)
The Rotary Knob controls the siren functions. There are 7 positions that may be
selected. Each position and its function is outlined under “Rotary Switch Operations”.
Volume Knob, Man Button and Horn Button (3)
The Volume Knob controls the volume of public address function. Volume is
increased by rotating the knob in a clockwise direction. Rotating the volume knob in a
counter-clockwise direction decreases volume. The volume knob has no effect on
any siren tones produced.
The Manual Button generates a variety of tones, depending on what position the
rotary knob is in. For further explanation of this button’s function, refer to “Rotary
Switch Operations.”
Holding the AIRHORN button on, generates an AIRHORN tone whenever the siren is
powered up.
1 2 3
STD
RA
MONO
DUAL
OFF
HF
MAN
STDBY
RAD
WAIL
YELP
T3
FUNCTION O
L MAN
VOL
AIRHORN