Specifications

A
GENERAL
GUIDE
TO
SCANNING
BIRDIES
CROSS
MODULATION
Birdies
are the
products
of
internally generated
signals
that
When
using
an
external
antenna,
a
strong frequency
close
make
some
frequencies
difficult
or impossible
to receive.
lf
to the
r""eptior,
frequency
might
cause-cross
modulation
you program
one
of these
frequencies,
you
hear
only noise (like
cross talk).
Set
the
ATT
switch
on the
back
oanelto
-10
on
that
frequency.
dB to
minimize
cross
modulation.
lf
the interference
is not
severe,
you
might
be
abte to turn
RECEpTION
NOTES
I
SQUELCH
clockwise to
cut
out
the
birdie. The
most
com-
'tv
r
hv
I
mon
birdies to watch
out for
are listed
below.
Reception
on the
frequencies
covered
by
your
scanner is
I
Birdie
Frequencies
mainly
"line
of
sight."
That
means you
usually
cannot
hear
I
stations
at
your
listening
location
that
are located
beyond
I
44.36oMHz
208.000MH2
767.400MH2
953.250MH2
1232.600MH2
the horizon'
I
13:333 212.L23
133:333
l3li333
13i3333
During
summer
months,
you
misht
be
abre to h_ear:tations
I
70.23s
24s.7so
sos.gso
1026.000
124s.850
',' the
30-50
MHz
range
located
several
hundred
or
even
I
70.085
25o.5oo
81s.6oo
10s2.750
1248.650
thousands
of miles
away.
This
is
due to
summer
atmo_
|
i3:??3
|i|:.t}iZ
!]3
933
1333:313
1333:333
spheric
conditions.
rhis
type
or
reception
is
unpreoiciaore,
I
79.435
298.0625
g22.2so
1104.2s0
1262.7so
_ut often
very
interesting!
|
79.800
298.8125
851.875
1107.000
1265.500
n^^.,^^,,.^^r,,r ^^_.:^^ !- ^L_ r,-r! |
80.520
3o9.Boo
8s4.375
rroe.zso
tili.iso
une very
useful
service
is
the
National
Weather
Service's
I
83.170
310.600
8s6.87s
1112.s00
1275.1s0
continuous
weather
broadcasts.
These
broadcasts
contain I
#ff:333
3il:333
336:331!
ll33
?313
1|L|;.?EB
weather
forecasts
and
data for
the
area
around
ll._:jltlo", I
86.86s
s42.goo
902.562s
1169.182s
1288.400
,-'.ts
bulletins
on
any
threatening
weather
conditions.
I
122s7s
366.000
905.062s
1203.312s
12s1.200
These
stations
use three
frequencies:
162.40,
162.47s,
and
I
13631L
l3?:li3
313:133
1333:3?33
i333:333
162.55
MHz
In
most
areas
of
the
country,
you
can receive
I
144.1s5
465.250
s21.12s
pzq.zo6"
one
of
these
frequencies.
I
155.125
488.375
948.250
1227.OO0
I
203.500
501 .4375
950.7s0
1229.800
|
I
26
1
I
-J