f
r
e
q
u
e
n
c
y
(
7
5
-
1
0
0
k
H
z
)
9
2
.
5
(
f
r
e
s
=
8
7
.
5
k
H
z
)
p
h
a
s
e
(
0
-
3
6
0
°
)
7
0
t
=
2
.
1
μ
s
⟶
m
a
g
n
e
t
i
c
f
i
e
l
d
⟶
P
o
y
n
t
i
n
g
v
e
c
t
o
r