Line Impedance Stabilization
Network, 24 Amps
The Solar
Electronics LISNs use a series inductor between the test sample and
the power source to provide the impedance-versus-frequency characteristic.
A coaxial connector with d.c. isolation is provided for connection to the
associated frequency selective EMI meter. The power source end of the
inductor is bypassed to ground.
When measuring conducted radio interference
voltages from active power lines to ground, it is essential to know the
line impedance so that repeatable tests can be made by more than one
laboratory. Artificial line impedances are specified in MIL-STD-462, V.D.E.,
C.I.S.P.R., C22.4, NACSEM 5100, ANSI C63.2 and other EMI specifications.
The characteristic impedance of the five
microhenry and 50 microhenry LISNs brackets the mean value of power line
impedance which has been measured by independent researchers. These two
inductance values in parallel with the 50 ohms of the EMI meter fall
between the minimum and maximum line impedance values which have been
measured. The mean value would be represented by a twenty microhenry
inductor in parallel with 100 ohms.
Specifications:
- Current Amps: 24
- Inductance μH: 50
- Line/Ground Voltage 50-60 Hz: 500
- Line/Ground Voltage 400 Hz: 240
- Circuit: Dual
- Frequency Range: 10 KHz- 50 MHz
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