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INSTRUCTION MANUAL
LI-3P-2x Series
3-PHASE LINE IMPEDANCE STABILIZATION NETWORKS (LISNs)
SECTI ON 6 -
LISN MEASUREMENTS
1912 1 E l T o ro R d
●
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
REV031418
6.0 LISN Measurements
Measurements of conducted emissions, sometimes referred to as disturbance voltages,
using any LI-3P-2x Series LISN are made individually on each current carrying conductor
with reference to ground.
Measured values must be corrected in order to account for any losses incurred along the
measurement path. These corrections usually include the insertion loss values for the LISN
(with respect to the test lead being measured), coaxial measurement cables,
attenuation pads or transient limiters, connecting adapters, etc.
6.1 LISN Insertion Loss Factors
The Insertion Loss for an LISN is essentially, the difference, in dB, between the
signal amplitude on the EUT power conductor at the entry point of the EUT Power
Port into the LISN, and the amplitude of the same signal at the measurement port
of the LISN.
All Com-Power LISNs are individually calibrated, and the insertion loss values are
provided. There are eight (8) sets of Insertion Factors for each of the LI-3P-2x
Series LISNs, so there are two (2) sets for each line; for REMOTE and LOCAL
operation. This is necessary because the RF measurement paths within the LISN
for the two respective modes are different, causing the insertion loss factors for
the two modes to also be different.
Typical Insertion Loss values for the LI-3P-2x Series LISNs are listed in the Figure 10
table.
FIGURE 10 -
Typical Insertion Loss Factors for LI-3P-2x Series LISNs
Equipment:
Three-Phase Line Impedance Stabilization Network (LISN)
Model:
LI-3P-2x Series
Serial Number:
202xxxxx
Calibration Date:
Local
Remote
Local
Remote
Local
Remote
Local
Remote
(MHz)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
(dB)
0.009
5.70
5.67
5.74
5.74
5.89
6.01
5.71
5.64
0.01
5.02
5.01
5.08
5.03
5.46
5.37
4.99
4.90
0.011
4.38
4.37
4.44
4.40
4.88
4.72
4.31
4.24
0.012
3.90
3.90
3.94
3.93
4.39
4.22
3.78
3.76
0.013
3.48
3.48
3.51
3.51
3.93
3.79
3.36
3.34
0.014
3.13
3.12
3.14
3.14
3.53
3.42
2.98
2.99
0.015
2.81
2.81
2.82
2.83
3.18
3.07
2.67
2.68
0.016
2.53
2.54
2.55
2.56
2.87
2.78
2.40
2.42
0.017
2.28
2.29
2.29
2.31
2.58
2.50
2.15
2.17
0.018
2.10
2.11
2.10
2.11
2.36
2.30
1.97
1.99
0.02
1.76
1.77
1.74
1.76
1.94
1.93
1.63
1.66
0.025
1.23
1.25
1.19
1.21
1.32
1.32
1.10
1.16
0.03
0.90
0.91
0.84
0.87
0.93
0.94
0.78
0.83
0.035
0.70
0.72
0.64
0.67
0.70
0.72
0.60
0.65
0.04
0.57
0.58
0.50
0.53
0.55
0.56
0.46
0.51
0.045
0.47
0.49
0.40
0.43
0.44
0.45
0.37
0.42
0.05
0.40
0.42
0.34
0.37
0.37
0.39
0.32
0.36
0.1
0.17
0.18
0.13
0.15
0.13
0.15
0.12
0.15
0.3
0.10
0.11
0.09
0.11
0.09
0.10
0.08
0.11
0.5
0.10
0.12
0.10
0.12
0.09
0.11
0.10
0.12
1
0.12
0.13
0.12
0.14
0.12
0.13
0.12
0.13
3
0.16
0.18
0.17
0.18
0.19
0.17
0.18
0.18
5
0.19
0.21
0.21
0.21
0.26
0.21
0.23
0.22
10
0.26
0.27
0.26
0.27
0.39
0.26
0.31
0.29
30
0.06
0.01
0.03
0.01
0.10
0.00
0.03
0.03
Insertion Loss value to be added to receiver reading:
Meter R Insertion Loss = Corrected Reading
Frequency
LISN Insertion Loss Factors
(
Local
&
Remote
Modes)
LINE 1
LINE 2
LINE 3
NEUTRAL
onth/Typical Day/Typical Year
