P
o
w
r e
o
u
p t
t u
M
o
d
l u
t a
o i
n
S
p
r u
o i
u
s
e
m
i
s s
o i
n
s
M
a
i x
m
u
m
f
e r
q
u
e
n
y c
d
e
i v
A
u
d
o i
d
s i
o t
t r
o i
n
(
t a
6
0
%
M
c i
o r
p
h
o
n
e
i
m
p
e
d
a
n
c
e
i C
c r
u
t i
y r
I
t n
r e
m
e
d
a i
e t
f
e r
q
u
e
n
y c
S
e
n
i s
v i t
y t i
1 (
2
d
B
S
N I
A
D
S
e
e l
c
v i t
y t i
– (
6
d
) B
S
e
e l
c
v i t
y t i
– (
6
0
d
) B
S
q
u
e
c l
h
s
e
n
i s
v i t
y t i
A
u
d
o i
o
u
p t
t u
(8 Ω , 5 % distortion)
A
u
d
o i
o
u
p t
u
i t
m
p
e
d
a
n
c
e
72
H
g i
h
L
o
w
t a
o i
n
m
o
d
l u
t a
o i
) n
1 (
s
/ t
2
n
) d
)
Transmitter
Variable reactance modulation
Receiver
Double superheterodyne
Wide: 0.18 μV or less
Narrow: 0.22 μV or less
W
N
N
6
5
W
A
p
p
o r
. x
2
5
W
–
6
0
d
B
r o
e l
s s
±
W
d i
: e
5
k
H
z
±
N
r a
o r
: w
2
5 .
k
H
z
3
%
r o
e l
s s
6
0
0 Ω
4
9
9 .
5
M
H
/ z
4
5
0
k
H
z
d i
: e
1
2
k
H
z
r o
m
o
e r
r a
o r
: w
1
0
k
H
z
r o
m
o
e r
W
d i
: e
3
0
k
H
z
r o
e l
s s
r a
o r
: w
2
4
k
H
z
r o
e l
s s
0.1 μV or less
2
W
r o
h
g i
h
r e
8 Ω