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LaplaCells provide a facility for the rapid and efficient testing of the EMC compliance of products. These cells offer a calibrated and screened environment in which radiated emissions can be measured and immunity to RF radiation can be tested. They exceed the requirements of IEC61000-4-20, thus affording compliant testing to IEC61000-4-3 and pre-compliance testing for radiated emission testing.

Laplace Instruments LaplaCell300 or LaplaCell600

The Cells are a modified form of GTEM cell, using a balanced dual septum design which maximizes EUT volume for a given external size of cell, and dramatically improves field linearity. The EUT volume is fully lined in structural polycarbonate capable of supporting heavy products and access is via a large, full height door at the end of the cell. Adjacent to the door is the I/O filter compartment which can be customized to suit the users requirements. USB, RS232, Parallel, Ethernet, co-ax and other product specific filters can be added at time of ordering.

Laplace Cell Models

LC600/3 3GHz Cell 60 x 60 x 60cm
LC300/3 3GHz cell  30 x 30x 30cm
LC600/6 6GHz Cell 60 x 60 x 60cm
LC300/6 6GHz cell  30 x 30x 30cm


The LC300 and LC600 can be paired with:


RF3000 Synthesizer 30MHz—3GHz
RF6000 Synthesizer 30MHz—6GHz

Power Amplifiers

RF1100 30MHz-1GHz

RF1200 1GHz – 2GHz

RF1330 1GHz – 3GHz

RF1600 1GHz – 6GHz

The LETIS (Laplace EMC Test Integration System) provides an automated power amplifier selection facility for radiated immunity testing.


Bundled Solutions:

RFI300/1 LC300+RF3000/1100
RFI300/2 LC300+RF3000/1100/1200
RFI300/3 LC300+RF3000/1100/1300
RFI-300/6 LC300+RF3000/1100/1600/LETIS
RFI600/1 LC600+RF3000/1100
RFI600/2 LC600+RF3000/1100/1200
RFI600/3 LC600+RF3000/1100/1300
RFI-600/6 LC600+RF3000/1100/1600/LETIS


Emissions Problem


Strong ambient signals

The cell provides an ambient-free volume due to total screening

Test site distortion

The cell is fully correlated and traceable to 3m OATS

Lack of ground plane and height scanning

Not required!

Lack of space

LaplaceCells are very compact


Immunity Problem


Expensive ancillaries

LaplaCells include field sensors as standard

Power amplifier requirements

very efficient design so that RF power requirements are minimal.

Leakage of high power RF

Fully screened so RF energy is contained

Field uniformity

LaplaCell concept produces better uniformity the GTEM.





Key Points
· 30MHz to 3GHz or 6GHz frequency coverage
· Fully calibrated for emissions and immunity
· 2 sizes:
– LC300/2 30 x 30 x 30cm for EUT up to 30cm cube
– LC600 Cell 60 x 60 x 60cm for EUT up to 60cm cube (includes 19″ racks up to 13u)
· Field sensor for immunity testing is included
· Complies with IEC61000-4-20
· Excellent field uniformity
· Compact size Ready for immediate use on delivery
· Standard filtered I/O includes mains feed, fiber optic access and 12 individual connections.

LaplaCells are specifically intended for use by manufacturers so that they can test their own products efficiently .
The LaplaCell design is an advance on the well known GTEM concept. However, the use of a dual septum provides:
· better field uniformity compact external size balanced septum fed with impedance conversion network to better match OATS conditions
· Built-in field sensor
· Camera and lighting options

Test cells (LaplaCell) is an optional extra for the following products: – SA1002 – 1GHz EMC Emissions Analyzer
– SA3000 – 3GHz EMC Emissions Analyzer
– RF3000 30MHz-3GHz or RF6000 30MHz-6GHz RF Synthesizers

Test cells (LaplaCell) appears in the following kits:
– RFI kit
 RFL kit


Equipment type



EUT size (max)

30cm  x  30cm  x  30cm

60cm  x  60cm  x  60cm

EUT volume 

51cm  x  48cm  x  41cm

78cm  x  82cm  x  87cm

Frequency range 

30 – 6000 MHz

30 – 6000 MHz

Range switching

2 bands, switched (local & remote switching)

Screen attenuation

60 dB

60 dB

Max RF power in

50 W

50 W

Power for 10 V/m

10 W

20 W

Field @ max RF in for 80% am modulation



RF input/output connector

N type / 50 Ohm VSWR better than 2:1

Auxiliary power

15 V DC (mains power unit supplied with cell, 110 – 240V AC)

Field sensor 

Included with cell Calibrated for 0-2.5 V DC output

Emissions calibration

Calibrated and correlated to 3m OATS. Full calibration data included (hardcopy & disk)

Door interlock


Filtered I/O

Mains feed plus 12 general purpose signals. Ethernet connection for camera and lighting.


Camera and lighting Additional I/O filtered feeds (to suit application)


Stainless steel with polypropylene EUT chamber


Table top

Floor, fitted with castors

Total weight



EUT weight (max) 



Size, L x H x W 

2.30m x 1.00m x 0.87m

3.20m x 1.60m x 1.30m


I/O filter compartment… internal


I/O filter compartment… external


 LaplaCell data sheet – Specifications for the LaplaCells LaplaCell300-3 & Lc600

 Technical report – Performance analysis of LaplaCell

 User Manual – User manual for typical Lc600

 Lc600 General arrangement – Mechanical sizes and weights

 Lc300/2 General arrangement – Mechanical sizes and weights

 Comparison between LaplaCell Technology and GTEM Technology