This article focuses on Lumiloop’s laser-powered E‑field probes: LSProbe 1.2 and LSProbe 2.0.
Check out 15 features of the unique measurement devices, which allow for high speed, high accuracy and high dynamic range.
#1 Reliable operation – 24/7
Lumiloop’s LSProbes are laser-powered. The galvanically isolated power supply eliminates the need for batteries. The miniaturized 3D E‑field probe enables unattended, continuous E‑field measurements with high resolution, high speed and low noise.
Your focus is on the measurement without interruptions.
#2 Two models available
 LSProbe 1.2 cross-section | The LSProbe 1.2 covers a frequency from 10 Hz to 8.2 GHz. The following variants are available: E: frequency 10 kHz – 8.2 GHz, field strength 1 V/m – 1 kV/m F: frequency 10 Hz – 8.2 GHz, field strength 1 V/m – 1 kV/m G: frequency 10 kHz – 8.2 GHz, field strength 10 V/m – 15 kV/m |
 LSProbe 2.0 cross-section | The LSProbe 2.0 is the next-generation electric-field probe. Its frequency ranges from 9 kHz to 18 GHz. The field probe’s six-monopole antenna design ensures isotropic operation at all frequencies. |
#3 Two Probes in One
All LSProbe models are equipped with two detectors per axis that cover a wide frequency range. An automatic mode selects the suitable detector based on the correction frequency. Of course, operation modes can be selected explicitly via software.
Only one device needs to be calibrated regularly, reducing total cost of ownership.
#4 LSProbe Calibration
Every LSProbe E‑Field Probe comes with a complete set of manufacturer calibration data for unparalleled linearity, temperature stability and frequency compensation.
For accredited calibration, Lumiloop offers the all-round carefree service of calibration according to ISO 17025. This includes checking your measuring equipment and handling the accredited calibration.
#5 Position the LSProbe at the place you need
Lumiloop offers a variety of stands and positioners for the LSProbes. From LSProbe Floor Probe Stand with multi-probe mounting brackets over exact positioning on Tabletop Probe Stand to Flexible Probe Stand, Lumiloop covers your standard positioning requirements.
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Variety of Tabletop Probe Stand Mounting Poles
LSProbe Floor Stand Mounting with LSProbe
#6 Suitable for ISO / IEC / MIL and Industrial OEM Standards
You need to measure according to international standards?
Our customers use LSProbe E‑Field Probes for:
ISO 11451–2, ISO WD 11451–5, ISO 11452–2, ISO 11452–11, IEC 61000–4‑3, IEC 61000–4‑21, ETSI EN 300 328, ETSI EN 301 893, RTCA/DO-160, numerous OEM standandards, and many more.
#7 Multi-Device Setups
The LSProbe can be used as single measurement device, or in multi-device set-ups. LSProbes can be combined with an endless number of other LSProbes – four probes (ISO 11451–2), eight probes (IEC 61000–4‑21, ISO 11451–5), or even more.
In those Multi-Probe Systems, all devices are synchronized, which is especially suitable for field distribution analysis, statistical field analysis and reverberation chamber applications. The LSProbes are built in a LSFrame product integration frame that keeps your lab tidy, so you can focus on your measurement.
The LSProbe can also be combined and synchronized with LSPM Power Meters. This setup enables you to perfectly align your fast E‑Field measurement with fast RF power measurement. Kill two birds with one stone!
#8 Third Party and In-House Software Integration
The LSProbe E‑Field Probe is integrated in many third party EMC test automation software. In-house EMC software can easily talk to the devices via well-documented SCPI commands. This makes the integration into your lab surroundings as easy as pie!
#9 Keep clean and keep on measuring
Lumiloop recommends the Fiber Connector Cleaning Kit to get rid of dust and other contamination. The cleaning kit allows for quick and easy cleaning and inspection of the fiber optic cables to ensure reliable operation. Read our Application Note 4 for details on practical implementation of fiber care.
#10 Individual and Summed Axes Analysis
LSProbe measures the isotropic E‑field strength value as well as the three single direction components with 500,000 samples per second. With LSProbe 2.0, you can optionally read out all six individual axes.
All measurements can be logged at full data rate for later detailed analysis, if wanted.
#11 Direct Radar Pulse Measurements After Amplification
The LSProbe is capable to measure radar pulses directly in the field, after amplification. This enables automotive component testing (3 µs pulses) as well as avionic and military applications (1 µs pulses).
#12 Triggered E‑Field Measurements
Triggered E‑field measurements allow the user to take full advantage of the LSProbe E‑Field Probe’s exceptionally high speed measurements. Waveform acquisition can be triggered by software or by hardware. The edge-sensitive hardware trigger signals originate from the CI-250 Computer Interface’s BNC/RJ45 connectors or the signal level with a set threshold for field strength triggering. The trigger system has a built-in dead-time of 100 μs, i.e., it can process up to 10,000 events per second.
#13 Sweep Analysis
The LSProbe Field Probe is able to evaluate an E‑field waveform containing a level or frequency sweep, thus enabling sped-up measurements. For sweep measurements the acquired waveform typically contains multiple sections of equal size, where each section is characterized by constant measurement conditions. Most commonly, the frequency setting of a setup is altered in a step-wise manner in order to measure the frequency-dependent field strengh. Each section of the field strength waveform will have a different, constant frequency associated with it. Dead-times at the beginning and end of each section may be applied to account for the setting characteristics of the setup under test. Due to the 500 kSample/s sampling rate of the LSProbe, waveform sections may be shorter than a millisecond, enabling the evaluation of more than a thousand distinct frequencies per second. This method is much faster than setting the frequencies individually and measuring field strength values via multiple discrete queries.
#14 Remote Power Measurements
LSProbe E‑Field Probes may be employed for Effective Isotropic Radiated Power (EIRP) measurements in far-field conditions where the distance between Field Probe and transmitter is known. EIRP is calculated using the equation PEIRP = (E ⋅ r)2 / 30 Ω.
E: E‑field strength in V/m; r: distance between transmitter and field probe in meters;
PEIRP: Effective Isotropic Radiated Power in Watts
The remote power subsystem supports EIRP measurements in accordance with EN 300328 and EN 301893, including pulse detection, calculation of power values in dBm and generation of pulse statistics, including duty cycle and averaged pulse power. The standards require measurements at a sampling rate of at least 1 MSamples/s over relatively long continuous stretches of time, e.g., one second. In mode 8 the LSProbe Field Probes continuously measure the y‑axis field strength only, operating at 2 MSamples/s.
#15 Virtual LSProbe
The LSProbe TCP Server is capable of instantiating virtual CI-250 Computer Interfaces and associated E‑field probes including the simulation of arbitrary E‑field patterns.
Virtual E‑field probes can replace physical field probes and signal generators during measurement setup preparation, feature demonstration, third party EMC software development and off-line signal analysis, including Multi-Probe setups.
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