Operating the Siren
17
Installation, Maintenance, and Service Manual
Federal Signal
www.fedsig.com
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.
• Radio: In this position, incoming radio messages are amplified by the siren and
rebroadcast over the outside speaker.
• 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).
• Wail: In this position, the siren produces a continuous “wailing” sound up and
down in frequency.
• Yelp: In this position, a continuous rapid “warbled” tone is generated.
• Priority: In this position, a continuous extremely rapid “warbled” tone is generated.
NOTE:
Pressing the microphone push-to-talk switch will override any function and
provide instant public address operation.
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 sounds the air horn tone. The vehicle horn does not sound.
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 Manual
position.
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.
Table 2 Tap II Functions
Selector
First Horn
Second Horn
Switch
Ring Tap
Ring Tap
Position
Produces
Produces
Wail
Yelp
Wail
Yelp
Priority
Yelp
