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LISN's

Line Impedance Stabilization Networks



LISN explanation of type numbers

Description

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.

Due to the large current-carrying capability of some LISNs, it is not always practical to use a switch for changing inductance values. Instead, some models are equipped with a high current pin plug-and-jack combination for quickly connecting and disconnecting a network and substituting another.This nylon insulated pin plug and jack arrangement is a safety feature, well isolated from inadvertent short circuits, providing protection to operating personnel.

Current ratings up to 200 amperes are available in 50 μH styles and 500 amperes in 5 μH styles. See the chart on the following page.

When measurements are made in a shielded room, the LISNs intended for F.C.C. applications will also serve for V.D.E. tests.When operating on an unfiltered power line, the V.D.E. specifications require a filter consisting of 250 microhenry inductor and a capacitor. This filter is included in the 24 ampere LISN, Type 9348-50-R-24-BNC, and the 50 ampere LISN, Type 8602-50-TS-50-N.

EMI specifications require one LISN in each ungrounded power lead. Even though the neutral is considered "ground", if it is not connected to chassis inside the unit under test, the lead must be tested with an LISN. Therefore, use two LISNs in d.c. or single phase a.c. applications, three LISNs for delta-connected three phase circuits, and four LISNs for "Y" connected three phase circuits.

Application

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 with100 ohms.


Current Inductance Line/Ground Voltage Case
Type Number Amps μH 50-60 Hz 400 Hz Size* Circuit Frequency Range
6330-100-PJ-50-N 50 100 270 130 #3 Single 10 KHz- 4 MHz
6330-100-TS-50-N 50 100 270 130 #3 Single 10 KHz- 4 MHz
6330-250-PJ-50-N 50 250 270 130 #3 Single 8 KHz- 4 MHz
6330-250-TS-50-N 50 250 270 130 #3 Single 8 KHz- 4 MHz
6330-600-PJ-50-N 50 600 270 130 #3 Single 7.5 KHz- 5 MHz
6330-600-TS-50-N 50 600 270 130 #3 Single 7.5 KHz- 5 MHz
6338-5-PJ-50-N 50 5 270 130 #1 Single 150 KHz- 65 MHz
6338-5-TS-50-N 50 5 270 130 #1 Single 150 KHz- 65 MHz
6338-57-PJ-50-N 50 57 270 130 #2 Single 14 KHz- 4 MHz
6338-57-TS-50-N 50 57 270 130 #2 Single 14 KHz- 4 MHz
6516-5-TS-10-BNC 10 5 270 130 #5 Single 150 KHz- 65 MHz
6516-57-TS-10-BNC 10 57 270 130 #6 Single 14 KHz- 4 MHz
7225-1 10 650 270 130 #1 Single 10 KHz-400 MHz (useable up to 1 GHz)
7333-5-PJ-50-N 50 5 500 240 #1 Single 150 KHz- 65 MHz
7333-5-TS-50-N 50 5 500 240 #1 Single 150 KHz- 65 MHz
7333-57-PJ-50-N 50 57 500 240 #2 Single 14 KHz- 4 MHz
7333-57-TS-50-N 50 57 500 240 #2 Single 14 KHz- 4 MHz
8012-50-R-24-BNC 24 50 135 N/A #1 Dual 10 KHz- 50 MHz
8028-50-TS-24-BNC 24 50 270 130 #1 Single 10 KHz- 50 MHz
8116-50-PJ-100-N 100 50 270 130 #3‡ Single 10 KHz- 30 MHz
8116-50-TS-100-N 100 50 270 130 #3‡ Single 10 KHz- 50 MHz
8116-100-PJ-100-N 100 100 270 130 #3‡ Single 10 KHz- 4 MHz
8116-100-TS-100-N 100 100 270 130 #3‡ Single 10 KHz- 4 MHz
8116-250-PJ-100-N 100 250 270 130 #3‡ Single 8 KHz- 4 MHz
8116-250-TS-100-N 100 250 270 130 #3‡ Single 8 KHz- 4 MHz
8309-5-PJ-100-N 100 5 500 240 #3 Single 150 KHz- 65 MHz
8309-5-TS-100-N 100 5 500 240 #3 Single 150 KHz- 65 MHz
8328-50-PJ-50-N 50 50 270 130 #3 Single 10 KHz- 50 MHz, 0.1f coupling capacitor
8328-50-TS-50-N 50 50 270 130 #3 Single 10 KHz- 50 MHz, 0.1f coupling capacitor
8410-250-R-24 24 250 270 130 #1 Dual 250H choke network with AC receptacle for use with 8012-( ) and 9252-( ) for VDE applications
8602-50-PJ-50-N 50 50 270 130 #4 Single 10 KHz- 50 MHz w/ 250H choke
8602-50-TS-50-N 50 50 270 130 #4 Single 10 KHz- 50 MHz w/ 250H choke
8610-50-PJ-100-N 100 50 500 240 #3‡ Single 10 KHz- 30 MHz
8610-50-TS-100-N 100 50 500 240 #3‡ Single 10 KHz- 30 MHz
8611-50-TS-10-N 10 50 270 130 #2 Single 10 KHz- 30 MHz w/ 250H choke
8615-2-TS-100-N 100 2 270 130 #1 Single 1 MHz- 1 GHz
8616-5-PJ-200-N 200 5 270 130 #3‡ Single 150 KHz- 65 MHz
8616-5-TS-200-N 200 5 270 130 #3‡ Single 150 KHz- 65 MHz
8616-50-PJ-200-N 200 50 270 130 #3‡ Single 10 KHz- 50 MHz
8616-50-TS-200-N 200 50 270 130 #3‡ Single 10 KHz- 50 MHz
8902-5-TS-500-N 500 5 500 240 #4 Single 150 KHz- 1 GHz
8905-50-TS-50-N 50 50 270 130 #3 Single 10 KHz-200 MHz
8907-250-TS-24 24 250 270 130 #1 Dual 250H choke network with binding posts. For use with two 8028-( ) for VDE applications
9106-1300-N-10-N 10 1300 270 130 #1 Single 10 KHz- 1 GHz
9117-5-PJ-50-N 50 5 500 240 #1 Single 150 KHz- 1 GHz
9117-5-TS-50-N 50 5 500 240 #1 Single 150 KHz- 1 GHz
9233-50-PJ-50-N 50 50 270 130 #3 Single 10 KHz- 50 MHz, 0.25F coupling capacitor
9233-50-TS-50-N 50 50 270 130 #3 Single 10 KHz- 50 MHz, 0.25F coupling capacitor
9247-50-TS-50-N 50 50 500 240 #3 Single 10 KHz- 50 MHz, 0.1F coupling capacitor
9252-50-R-24-BNC 24 50 270 130 #7 Dual 10 KHz- 50 MHz, 0.25F coupling capacitor
9322-50-R-10-BNC 10 50 270 130 #7 Dual 10 KHz- 50 MHz
9331-50-PJ-200-N 200 50 500 240 #3‡ Single 10 KHz- 50 MHz
9331-50-TS-200-N 200 50 500 240 #3‡ Single 10 KHz- 50 MHz
9345-5-R-10-BNC 10 5 135 N/A #1 Dual 150 KHz- 65 MHz
9348-50-R-24-BNC 24 50 270 130 #7 Dual 10 KHz- 50 MHz with 250H choke
9351-5-TS-200-N 200 5 500 240 #3‡ Single 100 KHz- 1 GHz, 150  impedance
9403-5-TS-10-BNC 10 5 270 130 #5 Single 150 KHz- 65 MHz
9408-50-R-24-BNC 24 50 500 240 #7 Dual 10 KHz- 50 MHz
9409-50-R-24 24 50 135 N/A #2 Dual 6 Output Auxiliary, no RF connector
9509-50-R-24-BNC 24 50 500 240 #7 Dual 10 KHz- 50 MHz w/ 250H choke
9517-50-R-10-BNC 10 50 270 130 #7 Dual 10 KHz- 50 MHz w/ 250H choke
9608-50-BP-10-BNC 10 50 500 240 #7 Dual 10 KHz- 50 MHz, binding posts, no switch
9615-50-R-25-BNC 25 50 270 130 #7 Dual 10 KHz- 30 MHz, air coil
9622-50-BP-10-BNC 10 50 500 240 #1 Single 10 KHz- 50 MHz
9623-50-TS-25-BNC 25 50 270 130 #1 Single 10 KHz- 30 MHz, air coil
9629-50-TS-25-BNC 25 50 500 240 #1 Single 10 KHz- 30 MHz
9632-50-TS-50-N 50 50 270 130 #3 Single 10 KHz- 50 MHz, high wattage for GM spec
9702-50-TS-100-N 100 50 270 130 call Single 10 KHz- 50 MHz w/ 250H choke
9706-5-TS-250-N 250 5 270 130 #3 Single 150 KHz- 65 MHz
9845-50-BP-10-BNC 10 50 135 N/A #1 Dual 10 KHz- 30 MHz, binding posts, no switch
9847-50-TS-50-N 50 50 270 130 #3 Single with 20F capacitor
9857-50-BP-24-BNC 24 50 135 120 #1 Dual 10 KHz- 50 MHz, binding posts, no switch
9861-50-BP-24-BNC 24 50 270 130 #7 Dual 10 KHz- 50 MHz, binding posts, no switch
9867-5-TS-50-N 50 5 270 130 #2 Single 10 KHz- 400 MHz w/ 10F capacitor
9911-50-R-10-BNC 10 50 135 N/A #1 Dual 10 KHz- 50 MHz
9913-50-TS-10-BNC 10 50 270 130 #7 Dual 10 KHz- 50 MHz, 6-32 threaded terminals

*Case Sizes (w x h x l) #3: 10.06" x 9.0" x 13.12" (25.72 cm x 22.86 cm x 33.34 cm)
        Add 3" (7.62 cm) for Base Plate #4: 7.53" x 7.63" x 18.97" (19 cm x 19.43 cm x 48.26 cm)
      ‡ With 50 or 60 Hz Ventilating Fan; add 7.09" (18.00 cm) #5: 3.12" x 1.75" x 3.87" (7.94 cm x 4.44 cm x 9.84 cm)
#1: 4.5" x 4.5" x 9.25" (11.43 cm x 11.43 cm x 23.5 cm) #6: 2.75" x 2.45" x 5.7" (6.98 cm x 6.22 cm x 14.48 cm)
#2: 7.0" x 7.0" x 8.25" (17.78 cm x 11.78 cm x 24.13 cm) #7: 13.06" x 7.0" x 10.06" (33.20 cm x 17.78 cm x 25.55 cm)