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INSTRUCTION MANUAL
AL-RE101
LOOP ANTENNA
SECTI ON 4
-
USING YOUR AL-RE101 LOOP ANTENNA
1912 1 E l T o ro R d
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Si l vera do, Ca lifo rni a 9 26 76
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(9 49) 459 -96 00
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co m-p o wer. com
Rev101617
4.1.1
Interpolation of Antenna Conversion Factors
In order to find the antenna conversion factor
(ACF)
for frequencies
between those listed in the table,
Equation (2)
may be used for
interpolation:
EXAMPLE CALCULATION #2:
In this example, the 50 ohm antenna conversion factor at
60 Hz
is
calculated. Using the
Figure 4
table, the following values are known:
Frequency
Antenna
Conversion
Factor (50
Ω
)
ƒ
1
50 Hz
ACF
1
77.7 dBpT/
μ
V
ƒ
2
100 Hz
ACF
2
71.7 dBpT/
μ
V
Using
Equation (2)
, the antenna conversion factor at 60 Hz is calculated as
ACF
x
:
EQUATION (2)
where:
ACF = unknown antenna conversion factor at
ƒ
X
X
ACF = antenna correction factor at
ƒ
2
2
ACF = antenna correction factor at
ƒ
1
1
ƒ
= frequency at which antenna conversion factor is desired
X
ƒ
= frequency just below
ƒ
1
X
ƒ
= frequency just above
ƒ
2
X
ACF
= ACF + (ACF - ACF )
X
log(
ƒ /ƒ
)
X
1
log(
ƒ /ƒ
)
2
1
1
2
1
(
)
ACF
=
77.7 + (71.7 - 77.7)
X
log(60/50)
log(100/50)
(
)
ACF
=
76.1
dBpT/μV
X
dBpT/μV
