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| Laplace LISNs |
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LISNs are used to measure the RF conducted back down the mains lead from the unit under test (UUT). Many standards refer to a LISN as an artificial mains V-network of 50ohm/50uH as specified by CISPR16. All standard Laplace LISNs are fully compliant with this requirement in all respects for the frequency band B, 150KHz to 30MHz. Each standard LISN includes a mains RF low pass filter to reject any noise already on the mains and an effective voltage transient limiter to protect any sensitive analyzer or receiver against high energy spikes. Note that these LISNs may be used on low voltage and/or DC connections provided that the current rating is not exceeded. COMPREHENSIVE - The Laplace range of LISNs provides the widest range available and covers all applications from test lab to pre-compliance, commercial to military and industrial to space satellite COMPLIANCE - All Laplace LISNs are fully compliant with the appropriate standard. Specialist models are available for automotive, military and satellite standards in addition to the standard CISPR16 range. PROTECTION - All standard CISPR16 LISNs are fitted with a transient limiter, protecting the sensitive input of spectrum analyzers and receivers from the inevitable high power glitches that are present on all mains supplies. PORTABILITY - A unique advantage of the Laplace range is that the Isolisn types can be used on mains supplies fitted with RCD, earth leakage detectors. Conventional CISPR16 LISNs always cause RCDs to trip. |
Laplace Line Impedance Stabilization Networks | |
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The Fully Compliant Accessory For Conducted Emissions Testing Unique, IsoLISN, option for portable use. Transient limiters included on Standard types. Full range of Line Impedance Stabilization Networks from 10 Amp up to 1000 Amp
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Single and Three Phase CISPR 16, MIL-STD-461E, Automotive and other special types
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Model Number |
Current Rating (Amps) |
Phases |
Iso-LISN |
Internal Transient Limiter |
Internal RF Amp |
Notes (See Below) |
Size |
Standard Reference |
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LISN-16A1P |
16 |
L,N |
- |
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no |
(1, 4, 5) |
A |
CISPR16
Band A 9kHz to 30MHz is available
Band B 150kHz to 30 MHz is standard |
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LISN-20A1PS |
20 |
L,N |
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(2, 3, 5) Portable |
B | |
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32 |
L,N |
- |
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(2, 5) |
C | ||
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63 |
L,N |
- |
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100 |
L,N |
- |
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200 |
L,N |
- |
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C & D | |||
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32 |
L1,L2,L3,N |
- |
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63 |
L1,L2,L3,N |
- |
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100 |
L1,L2,L3,N |
- |
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200 |
L1,L2,L3,N |
- |
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25 |
1 |
- |
no |
no |
Automotive Standard 100KHz - 100MHz |
E |
CISPR25 / EN55025 | |
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100 |
1 |
- |
no |
no |
E | |||
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LISN-C25/500A |
500 |
1 |
- |
no |
no |
F | ||
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10 |
1 |
- |
no |
no |
Military 20Hz-400MHz |
E |
MIL-STD-461E | |
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LISN-461E/20/2 |
20 |
L,N |
- |
no |
no | |||
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LISN-461E/20/4 |
20 |
L1,L2,L3,N |
- |
no |
no | |||
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100 |
1 |
- |
no |
no | ||||
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10 |
1 |
- |
no |
no |
Military 20Hz-400MHz |
E |
DefStan 59-41 |
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100 |
1 |
- |
no |
no |
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LISN-ESA-16A |
16 |
+28V/-28V |
- |
no |
no |
10Hz - 30MHz |
B |
ENVSAT |
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200 |
L1,L2,L3,N |
- |
no |
no |
230 / 400 VAC Optional 460 / 600 VAC |
G |
CISPR16 | |
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500 |
1 |
- |
no |
no | ||||
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1000 |
1 |
- |
no |
no |
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Notes | |
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1 |
Switched attenuator (0, 10, 20dB) and switched 150KHz high pass filter. |
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2 |
Mains supply for internal pre-amplifier required. |
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3 |
S LISNs feature the unique IsoLISN design which complies with EN61010 and has an earth leakage current less than 5mA, avoiding the problem of RCD trips. This makes them ideal for portable applications. |
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4 |
Fitted with standard mains outlet. UK, US, Schuko and Australian models available. |
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5 |
Line selector switch fitted to all LISNs, with remote control available on all standard types. |
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Size | ||
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Code |
W x H x D (mm) |
Type |
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A |
212 x 132 (3u) x 315 |
Instrument Case |
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B |
315 x 3u x 422 |
Instrument Case |
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C |
483 x 6u x 422 |
Instrument Case |
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D |
483 x 9u x 522 |
Instrument Case |
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E |
500 x 180 x 90 |
Flanged box |
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F |
500 x 180 x 120 |
Flanged box |
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G |
600 x 380 x 350 |
Cabinet |
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General Specifications | ||
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RF Output Socket: |
50 ohm, BNC | |
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Frequency Range: |
Band A - 9 KHz to 30 MHz Band B - 150KHz - 30MHz (u.o.s. above) | |
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Insertion Loss (dB): |
0 (Zero) dB, LISN16A1P, see note 1above | |
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Source Selection: |
Front panel switch and remote control. | |
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EUT Line Connections: |
LISN16A1P, see note 4 | |
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Artificial Hand Output: |
All CISPR16 LISNs fitted. | |
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Line Voltage: |
Single Phase: |
Up to 250V AC rms |
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Accessories | |
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LISN-TS |
External transient limiter for use with LISNs not fitted with internal transient limiter. |
Laplace Power Line Interference Probe | |
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Power Line Interference Probe. |
Laplace Conducted Emission Tester | |
PLIPMAN |
Complete Portable conducted emissions tester....See separate information sheet |
Laplace Conducted Reference Source | |
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CRS+
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The CRS+ is
a stable and repeatable, wideband generator covering the EMC
conducted bands A and B. It is specifically designed to check and
calibrate LISNs and associated equipment. Very quick and easy to
use, the CRS+ verifies that EUT measurements are valid and accurate. Ideal for: The CRS+ simply plugs straight into the EUT outlet port on a LISN. Switch on and scan band A and/or band B on the analyzer/receiver. Comparison with the calibration data of the CRS will immediately indicate the accuracy of your system. The direct output into the LISN ensures that external noise is eliminated and no additional cabling is required. Supplied complete with batteries and one adaptor cable. |
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