Table 2-5. Electronic Siren Controls
Twin Agent 4x4 Firefighting Truck
(Refer to Figure 2-5)
Control or Indicator
Selector Switch (Continued).
WAIL. In this position, the siren produces a continuous WAILING sound up and
down in frequency. Depressing the manual pushbutton will produce the YELP
YELP. In this position, a continuous rapid warbled tone is generated. Depress-
ing the manual pushbutton will have no effect.
HI-LO. In this position, a two-tone sound will be heard. Depressing the manual
push button will produce the YELP tone.
ON/OFF PA Volume Control
The ON/OFF PA Volume Control is used to turn the siren ON and OFF. It is
used to control the volume when the siren is used for public address or radio
amplification. Clockwise rotation of the knob increases voice volume in the pub-
lic address or radio amplification mode. The volume control does not control the
volume of the siren signals.
The Microphone Jack is designed for common microphone use.