Measure EM Radiation with NARDA SRM3006

Make Safety obvious by measurement

Radio, television, cellular telephony, wireless… Electromagnetic fields are used wherever and whenever wireless communications operate. These fields affect the whole environment, including the people moving about in them. Complete coverage would be impossible otherwise. National and international bodies have set limits to prevent harmful effects. These usually allow higher field strengths for the workplace environment than for the public. This is because people who routinely work in electromagnetic fields are normally professionally trained and aware of the risks, so they know what to do or they have been given instructions to limit their exposure time, for example. The operators of transmitting equipment and the responsible authorities are legally accountable for proving safety. To do this, they can make use of the services offered by institutes or private measurement providers. There is only one way you can prove safety: Measure it!

NARDA Gives safety

Narda Safety Test Solutions is the world leader in the development and production of measuring instruments for electric, magnetic, and electromagnetic fields. Our competence is based on the know how gained from many years of experience in the high frequency and microwave sectors – and from more than 95% of all the published patents for measuring these fields. The result is a range of high quality measurement solutions tailored to each application, with the long-term security provided by our management system that covers all areas and meets the requirements of the ISO 9001 and ISO/IEC 17025 standards.

Measurements with SRM 3006

Wideband meters give blanket coverage of large frequency ranges, such as from broadcast radio to cellular telephone frequencies and beyond. Equipped with special probes, they deliver results that are automatically referred to the applicable permitted limit values. They are generally easy to use. Selective measuring devices such as spectrum analyzer break down the fields into their individual frequency components, allowing detailed analysis. They are more difficult to use, and result evaluation requires a higher level of specialist knowledge.

The Selective Radiation Meter SRM-3006 from Narda Safety Test Solutions combines the analysis features of a spectrum analyzer with the simplicity of a wideband measuring set. It was specially developed for assessing safety in electromagnetic fields. Unlike an “adapted” spectrum analyzer, it provides you with operating modes tailored to each application for measuring individual transmission channels, and separate services such as analog or digital radio (TV, DVB-T, DAB), cellular radio (GSM, UMTS, LTE), or wireless (WLAN, WiMAX). The results are shown in a table as separate values and as a total value. The display is in field strength, power density, or directly weighted as a percentage of the permitted limit value. You don’t need to be a spectrum analysis specialist to be able to use the SRM.

Details

Broadcasting, cellular radio, industrial plant: Which source is contributing what to the field exposure level? Answering this question is as important to the relevant authorities and safety representatives as much as to the service providers. They often also need to know which installation, which channel or which radio cell is transmitting at what field strength. That is because whoever has exceeded the limit value will have to reduce their output power. In contrast, it is the overall exposure level that is important when it comes to protecting people and the environment.

The Selective Radiation Meter SRM is predestined for such investigations thanks to its application oriented operating modes. For example: ‘Safety Evaluation’ with automatic evaluation of individual services such as analog TV, digital radio (DVB-T, DAB), cellular telephony (GSM, UMTS, LTE), and wireless (WLAN, WiMAX) as well as a summary of the results as a total value. Or: ‘Level Recorder’ mode, which allows even pulsed radar signals to be recorded numerically. Or: ‘Scope’, with its display of field characteristic versus time. The resolution bandwidths are also tailored to the application. The SRM can select one narrow GSM channel or record the entire width of a DVB-T channel with this feature.

Indian Perspective

India
 has 
adopted 
one 
of 
the 
most 
stringent Electro 
Magnetic 
Field
 (EMF)
 exposure 
norms
 in
 the 
world.
The 

measures taken 
by 
the 
Department 
of 
Telecommunications,
Government 
of 
India, are Mobile Tower EMF and mobile phones.

• EMF
exposure 
limit 
(Base
 Station
 Emissions) 
is 
lowered 
to
1/10th
 of
 the existing
 CNIRP
 exposure 
level 
effective 
from
1st
 2012.
India
n ow 
has 
one 
of 
the 
most 
stringent 
EMF
 exposure 
norms 
in 
the 
world.
• Telecom 
Enforcement
 Resource
 &
 Monitoring
 (TERM)
 Cells
 of 
DOT
 have
 been
 entrusted 
with 
the 
job of 
conducting 
audit
 on
 the 
self
 certification 
furnished 
by 
the 
Service

TERM
 Cell 
shall 
carry out 
test 
audit 
up
to
10%
 of 
the 
BTS
 site
 on
r and om
basis 
and
 on 
all
 cases
 where
 there
 is
 a
 public complaint.
• Telecom
 Engineering
 Centre
 (TEC)
 has
 revised
 the
 Test
 Procedure
 for
 measurement
 of
 EMF
 for verification
 of
 EMF
 compliance
 for 
BTS
 towers 
in 
accordance 
with 
new
standards
 effective 
from
1st 

2012.
  

Target Applications       

Direction Finding, Radio Surveillance, Interference Localization, Occupational safety, Environmental Protection

Product Details

Wide frequency range from 9 kHz to 6 GHz

Single and three axis (isotropic) antennas

Resolution bandwidths (RBW) up to 32 MHz

SRM 3006 units are available with Livingston India Pvt Ltd. For rental and second-hand purchase, please contact us at info.india@microlease.com