Area Monitor AMB-8057

Area Monitor monitors electromagnetic fields up to 7 GHz

Weatherproof devices communicate via GPRS/FTP or operate as stand-alone measuring stations

Narda Safety Test Solutions has extended the frequency range of its Area Monitors AMB-8057 up to 7 GHz, so they can also capture the electromagnetic radiation emanating from WiMAX, WiFi, WLAN and other wireless services, as well as from industrial controllers. These weatherproof monitors can be installed wherever there is a need to monitor and record potentially dangerous electromagnetic fields for long periods.

With a new 7 GHz probe, the Area Monitors Type AMB-8057 from Narda Safety Test Solutions now cover the entire frequency range from long wave up to wireless services such as WiMAX, WiFi and WLAN. They can likewise detect industrial controllers that operate at ISM frequencies around 5.4 GHz. The use of GPRS to transfer measurement results, e.g. to an FTP server, is another new feature. Safety and environmental agencies or mobile phone network providers can call up the results over any Internet connection and then use the software supplied by Narda to collate and process the data and make it available to their own organizations or to the general public. A simplified version of the device without GPRS communication saves the measurement results internally and is ideal for measurement service providers, who temporarily monitor the field situation in public places, residential areas, or the workplace, and who need to record the results over a period of hours, days, or weeks at a time. The data here can be transferred to a PC via a serial interface.

The new probe makes a linear measurement of the electric field in the frequency range 100 kHz to 7 GHz. A special version also allows selective capture of the field components emanating from mobile phone services at 900 MHz and 1800 MHz (GSM) as well as 2100 MHz (UMTS). The Area Monitors are used to monitor and analyze the electromagnetic field situation where they are located, save the results, and issue warning messages if radiation exceeds a pre-set threshold level. In this way, transmitting equipment operators can monitor and prove that the relevant limit values are adhered to.

Several Area Monitors can be linked together into regional monitoring systems. The Area Monitors can also be fitted with different probes, e.g. with one that captures the electric field components from radio / TV and mobile phones separately. Narda also offers a magnetic field probe for the 10 Hz to 5 kHz range for measurements in the near-field of highvoltage cables, railroad overhead power lines, transformers and industrial equipment where high currents at low frequencies are present. All the probes are isotropic, i.e. they give a correct measurement regardless of the angle of incidence of the radiation.

Every probe is calibrated individually in the factory. Narda can provide internationally recognized, accredited calibration on request. The Area Monitors are independent of external power supplies, having batteries and solar cells. The measuring unit, probe and wireless modem are integrated into a weatherproof housing. The measuring station and mast including the base weigh a total of 7.5 kg and can therefore be easily installed practically anywhere. Users can equip the measurement station with their choice of probes.

EHP-50D isotropic field analyzer

One test system fits all: Analysis of electromagnetic fields from 5 Hz to 60 GHz

Narda Safety Test Solutions GmbH presents the EHP-50D isotropic field analyzer, an improved version of the measuring probe for low frequency electromagnetic fields from 5 Hz to 100 kHz, which expands the measuring range of their portable, wideband NBM-550 measuring set from 5 Hz to 60 GHz.

The EHP-50D probe was specially developed for assessing industrial workplaces in accordance with current international standards, and for measurements on industrial equipment. Simultaneous measurement of all three axes coupled with a dynamic range of up to 150 dB ensures that signals can be captured quickly, reliably and over a wide range.

The built-in spectrum analysis feature means that measurements targeting individual events can be made while neighboring frequencies are effectively blanked out. The optical interface enables measurements to be made remote from the NBM-550 in locations that are difficult to access or are highly exposed. Equipped with a data logger and Lithium-ion battery, the EHP-50D can also operate for up to 24 hours in stand-alone mode and the results read out to a PC on completion of the measurement.

Combined with the NBM-550 field measuring set, which is used to control the EHP-50D and display the results, there are three operating modes available for different measurement tasks: wideband measurement across a frequency range, measurement of only the highest level in a frequency band, and spectrum measurement using a marker function. The EHP-50D is an ideal extension of the measuring range of the NBM-550 to allow measurements covering the entire frequency band from 5 Hz to 60 GHz when the appropriate probes are used. The range of applications for the NBM-550 thus now extends from the analysis of low frequency fields in occupational situations up to high frequency measurements on rooftop mobile phone antennas.

SRM-3006 TS

PC software simplifies evaluation of electromagnetic field measurements

SRM-3006 TS from Narda Safety Test Solutions facilitates management of large amounts of test data and generates user-specific test reports

Narda Safety Test Solutions now offers a remote control, analysis and management software package for the frequency-selective field measuring set SRM-3006. Called SRM-3006 TS, the PC software simplifies the acquisition and storage of the results of electromagnetic field measurements, enables subsequent analysis and the automatic generation of user-specific test reports.

Large quantities of data often result from electromagnetic radiation measurements designed to protect people or the environment. Data acquired by the Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions can now be managed, analyzed and recorded using the PC software SRM 3006 TS. Database functions facilitate storage by measurement location and measurement project. A separate data field contains extra information about the measurement location and conditions, such as GPS data, cartographic representations or voice comments recorded on-site.

All results can be subsequently analyzed. For example, the software can automatically search for peak values in frequency spectra or determine average values over time periods. Integration over a selectable frequency range enables automatic determination of the field exposure due to an entire radio communication service, such as GSM-1800 downlink, or due to an individual service provider. Similarly, later analysis enables identification of pilot channels, as well as the use of individual extrapolation factors to determine the maximum field exposure when a transmitter is operating at full load.

The PC software SRM-3006 TS can import data from earlier SRM-3006 software and print out all results directly or export them to Office applications using custom style sheets. This enables the simple production of user-specific test reports. The main users of the software will be the operators of radio and mobile communications transmitters, authorities, and companies providing measurement services.

Basic info about the SRM-3006

The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions has been specially developed for environmental and safety measurements in electromagnetic fields. Using isotropic measuring antennas, the instrument covers the entire frequency range from 9 kHz to 6 GHz. It can therefore be used equally well to investigate safety in the near field region of long wave transmitters, make measurements on radio and TV broadcast transmitters, and determine exposure levels caused by the latest generation of mobile telecommunications services.

Selective Radiation Meter SRM-3006 with "Scope" mode

Real-time analysis of electromagnetic fields in hand-held format

Selective Radiation Meter from Narda Safety Test Solutions now with time function analysis in the nanosecond range

Narda Safety Test Solutions has now equipped its frequency-selective measuring set for electromagnetic fields with a "Scope" operating mode. Using this, it is now possible to analyze the frequency content and time characteristics of signals from radar equipment, mobile communications services such as Wi-Fi, WLAN, WiMAX, and DECT, or radio control systems like ZigBee and Bluetooth. The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions is now available with a "Scope" operating mode. The instrument displays the real-time characteristic of a signal recorded using frequency selection. It is possible to measure pulse widths and signal periods as well as set triggers, just as with an oscilloscope. The time intervals that can be set range from 24 hours down to microseconds, and the resolution goes down into the nanosecond range. It can therefore be used to make long-term observations of individual radio channels e.g. over the course of an entire day, as well as to detect even the shortest of impulses, such as from radar equipment.

This combination of frequency-selective measurement and display versus time opens up possibilities that are not covered by either pure spectrum analysis or simple measurement over time:

- In unknown multi-frequency environments specialists candetermine the type of field source by marking a frequency line displayed in "Spectrum" mode and switching to "Scope" mode to look at the time characteristic which exhibits specific features for various mobile communications services such as Wi-Fi, WLAN, WiMAX or DECT. The resolution bandwidth (RBW) can be set between 40 kHz and 32 MHz – enough to capture an entire WiMAX channel.

- Where the signals are known, e.g. from GSM stations, operatorscan select a single 200 kHz bandwidth traffic channel (TCH) and measure the loading of the individual timeslots within the frequency channel using "Scope" mode.

- In "Scope" mode, the instrument records the real peak values ofradio control signals in the industrial environment, such as ZigBee, or Bluetooth, or in the public and private domain – garage door openers, automobile keys, installation switches – even in complex situations where several signals are superimposed.

The SRM-3006 measures the average, RMS and peak values simultaneously; further conclusions about the type of field source can be drawn from the ratios of these values to one another. The instrument can be set to display all results in either physical quantities, such as field strength (V/m, A/m) or power density (W/m2, mW/cm2), aslogarithmic expressions (dBμV), or directly as a percentage of the permitted limit value. For the latter, the weighting curves for all the current safety standards are stored in the instrument.

The SRM-3006 automatically takes the calibration data into account when Narda's proprietary antennas are used. The instrument also accepts measuring antennas from other manufacturers, such as socalled sniffer probes. In such cases, software can be used to upload the calibration data to the instrument.

About the SRM-3006

The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions has been specially developed for environmental and safety measurements in electromagnetic fields. Using isotropic measuring antennas, the instrument covers the entire frequency range from 9 kHz to 6 GHz. It can therefore be used equally well to investigate safety in the near field region of long wave transmitters, make measurements on radio and TV broadcast transmitters, and determine exposure levels caused by the latest generation of mobile telecommunications services.

Selective Radiation Meter for EMF and EMCE measurements

Selective measurement of electromagnetic fields from 9 kHz to 6 GHz

New Selective Radiation Meter from Narda Safety Test Solutions especially for EMF and EMCE measurements

At A+A, Narda Safety TestSolutions is presenting a new frequency-selective measuring set for environmental and safety measurements in electromagnetic fields. With its isotropic (non-directional) measuring antennas, it covers the entire frequency range from 9 kHz to 6 GHz, from long wave up to the latest mobile phone services.

The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions has been specially designed for environmental and safety measurements in electromagnetic fields. With its isotropic measuring antennas, it covers the entire frequency range from 9 kHz to 6 GHz. Its range of applications therefore runs from safety investigations in the near field range of long wave transmitters, through measurements on radio and TV broadcasters and right up to exposure level measurements on the latest generation of mobile communications services.

The combination of measuring set and antenna is designed for outdoor use: robust, splash-proof housing, batteries that can be replaced onsite, results stored with date, time and GPS coordinates, and a voice recorder for spoken comments all simplify everyday tasks in the field or on antenna towers. Pre-programmed test routines prevent mistakes and save time and money.

Tailored operating modes support the special measurement tasks. "Safety Evaluation" mode automatically summarizes the selectively measured values as individual and overall results for separate channels, for an entire service or for one provider, as well as for the overall exposure level at the location. Another operating mode records the real-time variation in field exposure, for instance. The instrument displays all results in physical units or directly as a percentage of the permitted limit value. The weighting curves for all current safety standards are stored in the instrument for this purpose.

All measuring instruments and antennas are calibrated, traceable to national and international standards, so they deliver reliable and reproducible results.