Operating instructions

SECTION I
GENERAL DESCRIPTION
The Model PA300 Series can drive one 11-ohm
impedance, high power (100W) or low power (58W)
speaker.
The Tap II feature allows the driver to change
the siren sound from wail to yelp (or vice-versa) via
the vehicle’s horn ring. Tap II provides especially
effective traffic clearing capability. In addition to Tap
II, additional alternate sounds can be activated in
two other selector switch positions by depressing and
holding the horn ring for as long as the alternate
sound is desired. The charts in Section IV of this
manual illustrate the operation of these features
more fully.
Other special features of the Model PA300
Series include:
• High degree of reliability is achieved
through the use of integrated circuits
and silicon output transistors.
• Control panel is illuminated with
LED's.
• Newly designed printed circuit board
provides improved performance and
durability under a wide range of
environmental conditions.
PA300 Series Models:
• 690000 12V, 100W, HI-LO with
microphone
• 690001 12V, 100W, HI-LO with
microphone jack
• 690002 12V, 100W, PRIORITY with
microphone
• 690004 12V, 100W, PRIORITY with
microphone jack
-1-
Figure 1-1. Model PA300 Series Electronic Siren.
The Federal Model PA300 Series (figure 1-1) is a
precision built, efficient and economical, full-featured
electronic siren of advanced design. It provides wail,
yelp, hi-lo (Models 690000 and 690001) or priority
(Models 690002 and 690004) siren tones, as well as
the Tap II feature, public address (PA), radio re-
broadcast and an air horn sound.
The siren should be installed in negative ground
vehicles with 12-volt electrical systems. It is pro-
tected against failure modes (including reversed
polarity) by a fuse that is replaceable without tools.
No components protrude from the bottom of the siren
to interfere with mounting arrangements.
A noise-cancelling microphone is wired-in
(Models 690000 and 690002) to prevent loss or theft.
It provides high quality voice reproduction without
feedback “squeal”. The microphone push-to-talk
switch overrides any siren signal for instant PA use.
PA and radio volume are adjustable by means of a
front panel GAIN control. Radio inter-connect wires
are built-in. No additional cables are required.
Models 690001 and 690004 are supplied with a
microphone jack. To use the PA functions, order the
optional Model MNCT-SB microphone.
290A4452-01