A.H. Systems AK-285R Manual de instrucciones - Página 11
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A.H. Systems AK-285R Shielding Effectiveness Antenna Kit
Here is a sample calculation of the required dynamic range at a 1 meter separation. Both
the monopole and loop antennas have one passive and one active antenna. The use of
preamplifiers with the active antennas is not recommended.
Noise Level
(10 Hz RB) Vt-Vr
Monopoles
1 MHz
5 MHz
10 MHz
20 MHz
40 MHz
50 MHz
Loops
1 MHz
5 MHz
10 MHz
20 MHz
40 MHz
50 MHz
Biconicals
20 MHz
50 MHz
100 MHz
200 MHz
300 MHz
Log
Periodics
300 MHz
500 MHz
1 GHz
1.5 GHz
2 GHz
© A.H. Systems inc. – August 2011
REV A
AK-285R and AK-285T
Dynamic Range Calculations
S + N
N
-130
18
6
-130
19
6
-130
17.5
6
-134
9
6
-134
8
6
-134
3
6
-130
52
6
-130
39
6
-130
31
6
-134
38
6
-134
51.5
6
-134
53.5
6
-134
33.5
6
-134
23.6
6
-134
12.8
6
-134
17.9
6
-134
26.6
6
-134
13.4
6
-134
13.8
6
-134
19.4
6
-134
24.1
6
-134
26.3
6
0 dB Sig
Xmtr
Gen
Amp
Dynamic
Preamp
Margin
Range
Gain
6
100
6
99
6
100.5
6
113
6
114
6
119
6
66
6
79
6
87
6
84
6
70.5
6
68.5
6
88.5
31
6
98.4
31
6
109.2
31
6
104.1
31
6
95.4
31
6
108.6
31
6
108.2
31
6
102.6
31
6
97.9
31
6
95.7
31
Dynamic
Dynamic
Range
1 Watt
Range with
with
Power
1W Power
Preamp
Amp
30
30
30
30
30
30
30
30
30
30
30
30
119.5
129.4
140.2
135.1
126.4
139.6
139.2
133.6
128.9
126.7
Amp
130
129
130.5
143
144
149
96
109
117
114
100.5
98.5
11