4
4--1
1..
G
GE
EN
NE
ER
RA
AL
L..
All controls utilized during
All controls utilized during normal operation of
normal operation of
the Model PA300 are located on the front panel (see
the Model PA300 are located on the front panel (see
figure 4-1).
figure 4-1).
The wired-in noise cancelling microphone pro-
The wired-in noise cancelling microphone pro-
vides high quality voice rep
vides high quality voice reproduction in the public
roduction in the public
address mode. The microphone push-to-talk switch
address mode. The microphone push-to-talk switch
will override all siren functions, except radio rebroad-
will override all siren functions, except radio rebroad-
cast, for instant PA use.
cast, for instant PA use.
4-
4-2.
2. GA
GAIN
IN CO
CONT
NTRO
ROL.
L.
The GAIN control is used to turn the s
The GAIN control is used to turn the siren on
iren on
and off. Also, it is used to
and off. Also, it is used to control the volume when
control the volume when
the siren is used for public
the siren is used for public address or radio amplifi-
address or radio amplifi-
cation. Clockwise rotation of the knob increases voice
cation. Clockwise rotation of the knob increases voice
volume in the public addr
volume in the public address or radio amplification
ess or radio amplification
mode. The GAIN control does not control the volume
mode. The GAIN control does not control the volume
of the siren signals.
of the siren signals.
The maximum clockwise setting of the control
The maximum clockwise setting of the control
will be determined, in most cases by
will be determined, in most cases by the point at
the point at
which feedback or “squeal” occurs. This will depend
which feedback or “squeal” occurs. This will depend
upon the microphone gain, open windows, speaker
upon the microphone gain, open windows, speaker
placement, proximity of reflecting surfaces (building
placement, proximity of reflecting surfaces (building
or other vehicles), etc. Adjust the GAIN control to a
or other vehicles), etc. Adjust the GAIN control to a
position just below the point at which
position just below the point at which feedback
feedback
occurs or as desired.
occurs or as desired.
4-
4-3.
3. SE
SELE
LECT
CTOR
OR SW
SWIT
ITCH
CH..
The Selector switch is a five-position rotary
The Selector switch is a five-position rotary
switch used to select the mode of operation. The
switch used to select the mode of operation. The
following are positions on the Selector switch.
following are positions on the Selector switch.
A.
A.
RADIO
RADIO
..
In this position, incoming radio messages
In this position, incoming radio messages
are amplified by the siren and rebroadcast over the
are amplified by the siren and rebroadcast over the
outside speaker.
outside speaker.
B.
B.
MANUAL
MANUAL
..
In this position, it is possible to operate the
In this position, it is possible to operate the
siren by activating the
siren by activating the HORN/SIREN switch. The
HORN/SIREN switch. The
siren can also be activated by means of an auxiliary
siren can also be activated by means of an auxiliary
switch, such as the horn ring
switch, such as the horn ring button (refer to para-
button (refer to para-
graph 4-6).
graph 4-6).
C.
C.
WAIL
WAIL
..
In this position, the siren produces a
In this position, the siren produces a con-
con-
tinuous “wailing” sound, up and down in frequency.
tinuous “wailing” sound, up and down in frequency.
D.
D.
YELP
YELP
..
In this position; a continuous, rapid “war-
In this position; a continuous, rapid “war-
bled” tone is generated.
bled” tone is generated.
E.
E.
HI-LO
HI-LO
..
In this position, a two-tone sound will
In this position, a two-tone sound will be
be
heard. This distinctive tone may be reserved for any
heard. This distinctive tone may be reserved for any
special indication or situation.
special indication or situation.
4-
4-4.
4. HO
HORN
RN/S
/SIR
IREN
EN SW
SWIT
ITCH
CH..
The HORN/SIREN switch, located on the left
The HORN/SIREN switch, located on the left
side of the front panel, activates the electronic air
side of the front panel, activates the electronic air
horn sound (up) or peak-and-hold sound (down) in
horn sound (up) or peak-and-hold sound (down) in
any siren mode except radio.
any siren mode except radio.
4-
4-5.
5. TA
TAP
P II
II FU
FUNC
NCTI
TION
ONS.
S.
Tap II allows
Tap II allows the driver to
the driver to change the
change the siren
siren
sound via the vehicle’s horn ring. This
sound via the vehicle’s horn ring. This feature is
feature is
especially effective for clearing traffic. The chart
especially effective for clearing traffic. The chart
below demonstrates how the horn ring can be
below demonstrates how the horn ring can be used to
used to
change the siren sound:
change the siren sound:
TAP II FUNCTIONS
TAP II FUNCTIONS
S
Se
elle
ecctto
or
r
F
Fiirrsst
t H
Ho
orrn
n
S
Se
ecco
on
nd
d H
Ho
orrn
n
S
Sw
wiittcch
h
R
Riin
ng
g T
Ta
ap
p
R
Riin
ng
g T
Ta
ap
p
P
Po
ossiittiio
on
n
P
Prro
od
du
ucce
es
s
P
Prro
od
du
ucce
ess
W
Wa
aiill
Y
Ye
ellp
p
W
Wa
aiill
Y
Ye
ellp
p
W
Wa
aiil
l
Y
Ye
ellp
p
4-6
4-6..
PR
PRES
ESS A
S AND
ND HOL
HOLD F
D FUNC
UNCTI
TIONS
ONS..
Additional alternate sounds
Additional alternate sounds can be activated in
can be activated in
two other Selector switch positions, by depressing
two other Selector switch positions, by depressing
and holding the horn ring for as
and holding the horn ring for as long as the alternate
long as the alternate
sound is desired. The chart below shows these
sound is desired. The chart below shows these
additional “Press and Hold” functions:
additional “Press and Hold” functions:
PRESS
PRESS AND
AND HOLD
HOLD FUNCTIONS
FUNCTIONS
S
Se
elle
ecctto
orr
P
Prre
esss
s o
on
n
R
Re
elle
ea
asse
e o
of
f
S
Sw
wiittcch
h
H
Ho
orrn
n
R
Riin
ng
g
H
Ho
orrn
n R
Riin
ng
g
P
Po
ossiittiio
on
n
P
Prro
od
du
ucce
ess
P
Prro
od
du
ucce
ess
H
Hii--L
Lo
o
A
Aiir
r
H
Ho
orrn
n
H
Hii--L
Lo
o
M
Ma
an
nu
ua
all
P
Pe
ea
ak
k a
an
nd
d
C
Co
oa
asst
t d
do
ow
wn
n
H
Ho
olld
d
o
orr
a
an
nd
d
ssiille
en
ncce
e
Air Horn
Air Horn
or silence
or silence
Figure 4-1. Front View.
Figure 4-1. Front View.
-9-
-9-
Содержание PA300 Series 690009
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