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Gigahertz Solutions HF35C Скачать руководство пользователя страница 22

 

        

    

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Page 22 of 46   

 
 

 

Audio Frequency Analysis (HF35C / HF38B only) 

Many different frequencies within the frequency  band  between 800 MHz and 2.7 GHz, are 

being used by many different services. The audio analysis8 of the modulated portion of the 
HF signal  helps to identify the source of a given HF radiation signal. 

Sounds and signals are very difficult to describe in writing. The easiest way to identify them 
is to listen to the sound samples of   the different signal sources, which can be found as MP3 
files on our homepage. Alternatively, you can approach  known  HF sources very closely and 
listen to and memorise their specific signal patterns. 

 

”Marking“ of un

-pulsed signals: 

Un-pulsed signals or signal portions by their very nature are not audible in the audio analysis 
and  therefore  easily  missed.  For  that  reason,  in  our  meters  they  are  marked  by  a  uniform 

“rattling” tone, with its volume proportional to its contents of the total signal. This “marking” 

has a frequency of 16 Hz (please see sound samples   on our website). 

The audio analysis can be simplified by the frequency filters we offer. 

 

For more in-depth analyses 

Gigahertz Solutions offers: 

 

Attenuators for expanding the designed range of the analysers upwards for 
strong sources of pollution. 

 

Frequency filters for a more precise separation of different radio frequency 
service  bands. 

 

Instruments for lower HF: For measurement of signal frequencies above 27 
MHz (including: CB radioing, analogue and  digital 

 

 

 

 

 

 

antenna 

 

potentiell 

Bereich

 

 

Содержание HF35C

Страница 1: ...Gigahertz Solutions HF35C Radio Microwave Field Measurement Meter www EMF Experts com HF 35C Meter Training Handbook and User Guide ...

Страница 2: ... Meter at Work in Real world EMF Situations PART 1V Some Things You Might Find Interesting About This Meter PART V Conversion Table Precautionary Guidelines and Measurement Worksheet Note This meter is a German made meter and the user information provided by the manufacturer is originally written using British English spellings so in this booklet you will find British and USA spellings of words us...

Страница 3: ...er square meter µW m This is what allows a straight forward assessment of the personal levels of electromagnetic radiation exposure which in turn lets us make a proper determination of suitable remedial actions and enables a before and after testing of their effectiveness All of this permits us to reach our end goal of creating an EMF free living and working environment at least as far as possible...

Страница 4: ...d to keep the fragile antennae from being damaged You ll assemble the antennae on the meter body in two easy steps This is a good box to keep your meter safely stored when not in use since the antennae is made of a material normally used for the interior of a circuit board and that is why it looks like a circuit board with lots of soldering of small thin elements and delicate pieces Although the m...

Страница 5: ...s snugly onto the antennae terminal on the right side where you see the antennae symbol It generally comes with a 9 volt battery that you will need to install If the battery is weak the words LOW BATT will appear vertically in small letters in the center of the display window In order to save battery life the meter will shut itself off after 40 minutes Getting Familiar with Your Meter Functions ...

Страница 6: ...s detecting This feature is a representation in audio format of the signal your meter is detecting However the audio feature gives you no indication of the values of the field strength it is detecting in other words the audio dial is simply a volume control intended to make a signal more or less audible hear able Louder volume does not indicate higher field strengths or higher levels of EMF exposu...

Страница 7: ...uding this one typically have a margin of error accuracy variance with the exception of those meters used for industry or government regulatory compliance These compliancy meters are far more expensive since they are designed to comply accurately to exacting standards and must be recalibrated usually annually to meet these very strict and certified standards This simple directional meter offers ad...

Страница 8: ...ave frequencies to determine their compliance with the more biologically based precautionary safety standards that we aim to achieve the Power Flux Density display window indicates to us the amount of power or exposure that we are receiving from this particular type of EMF in this case radio microwaves This HF35C meter is designed specifically to measure radio microwaves in the frequency range tha...

Страница 9: ...it to the top position of the display selector switch which is the top switch on the right side of the meter will set you on the most sensitive reading on the meter which as you see there is 0 to 199 9 If you are in a location where the readings are high e g over 200 then slide the button down to read up to 1999 µW m If the frequencies that it is detecting are to use an old analog term pegging the...

Страница 10: ...twork aka WiFi Hotspot _______________________________________________ The Series of High Frequency HF Models Here you see the three meters in the GigaHerz Solutions model series in left to right graduated order of increasing number of features Why We Choose to Go with the HF35C for our Students Most economical radio frequency meters really only act as microwave detectors or simplistic EMF Alerts ...

Страница 11: ...yback WiFi DECT Bluetooth Smart Meters Airport Radar Microwave ovens and countless personal devices and household convenience devices HFE35C High Frequency Extended Another handy feature worth mentioning about this meter is that an attachment can be added that turns the meter into an omni directional meter so using the same meter body you have both options uni directional and omni directional radi...

Страница 12: ...els of RADIO MICROWAVE being emitted The Peak Value is regarded as the measurement critical to assessing potential biological effects In Addition to the features of the HF32D Model Easy to operate power the unit on selecting measurement settings and recording the LCD displayed readings as you walk the meter through your living space Accessorized with a sturdy Logarithmic Periodic Antenna designed ...

Страница 13: ...F testing Measuring Ranges 0 1 199 9 µW m 1 1999 µW m Maximum display resolution is 199 900 µW m which requires the external DG20 Attenuator Calibration During the manufacturing process strict calibration procedures are followed using only high end calibrated measurement instruments This guarantees that every HF35C meter made by Gigahertz has been individually calibrated to a traceable standard Te...

Страница 14: ...logical assessment one step further because it has the ability to assimilate and read the RADIO MICROWAVE exposure conditions typical for a human body A measurement taken with this equipment provides a 360 degree RADIO MICROWAVE exposure snap shot of your body s radio microwave exposure levels in the total sense Equipped with Two Antennas enhanced circuitry for use with the Ultra Broadband Omni Di...

Страница 15: ... a result of misuse is excluded from this warranty ______________________________ Next we discuss the Manufacturer s User Guide which compares the three different HF models and takes us into somewhat more technical user ground since the company designs their meters for in their words the the technical amateur We will expand on the material with EMF Expert notations interspersed throughout to clari...

Страница 16: ... meter around its longitudinal axis you will be able to pick up any polarisation plane Fluctuations with regard to space and time Reflexions can cause highly localised amplifications or cancellations of the high frequency radiation in particular inside buildings This is why one should stick to the step by step procedure in the next chapter In addition most transmitters and cellular phones emit wit...

Страница 17: ...a of sensitivity transition aim horizontally for moderately elevated targets such as transponder masts The analyser suppresses frequencies below 800 MHz to avoid the readings being disturbed by lower frequency sources In order to measure frequencies below 800 MHz down to 27 MHz the instruments HFE35C and HFE59B are available from Gigahertz Solutions They come with an active horizontally isotropic ...

Страница 18: ... it slowly drops Note of caution Switch on softly to avoid switching peaks which then will be retained for some time simulating unrealistic power densities If peaks are very short and very high the holding capacity needs an instant until it is fully charged How to Execute the Measurements Hold the HF analyzer with a slightly outstretched arm your hand at the rear of the instrument For a rough firs...

Страница 19: ...is recommended UMTS 3G LTE 4G WiMAX DVB WLAN during full data transmission The modulation of these high speed services includes high needle like peaks compared to the average power transmitted Such signals are referred to as high crest factor signals Measure for 1 or 2 minutes by slightly panning the meter pointing to the direction of the main source and multiply the highest value by ten for a com...

Страница 20: ...0 may still occur For TETRA apoliceradio communication systemusedinEurope notUSA a factor of 2 for WLAN standby rattling a factor 4 is enough Mind the internal noise level where a correction does not make sense Applies for HF35C and HF38B When using the HF32D the approach would be to multiply the display value by 10 to be on the safe side especially at low levels and when DECT phones can definitel...

Страница 21: ...of the meters even the highly sensitive HF38B a reliable communication is absolutely possible Identification of the sources of pollution After determination of the total exposure the next step is to find out where the radiation enters the examined room As a first step eliminate sources from within the same room e g cordless phones wireless routers etc Once this is completed the remaining radiation...

Страница 22: ...patterns Marking of un pulsed signals Un pulsed signals or signal portions by their very nature are not audible in the audio analysis and therefore easily missed For that reason in our meters they are marked by a uniform rattling tone with its volume proportional to its contents of the total signal This marking has a frequency of 16 Hz please see sound samples on our website The audio analysis can...

Страница 23: ...ruments for low frequencies Electrosmog is not limited to the Radio Frequency range Also for the low frequency range such as power distribution and domestic installations and railways including their higher harmonics we offer a broad range of affordably priced instruments with high professional standards Please contact info gigahertz solutions de for further information PowerSupply Auto Power Off ...

Страница 24: ...area of interest for a closer evaluation change the position of the instrument in order to investigate the actual power flux density or field strength and measure it as accurately as possible You can do this by Pointing in all directions including upwards and downwards while keeping your meter in a flat position This will enable you to establish the main direction of the incoming radio microwave r...

Страница 25: ...you This cancelling and combining of waves is sometimes the result of radio microwaves from various technologies overlapping in the same space or simply due to the nature of waves themselves Radio waves and microwaves can reflect off surfaces like mirrors refract and diffract through structures such as building materials scatter in certain atmospheric situations and be absorbed by our bodies and m...

Страница 26: ...ls of biological safety are very low And although like all EMF the field strength drops off with distance RADIO MICROWAVE microwave transmissions such as those originating from cell towers are designed to travel far distances tens of miles kilometers and in some cases like airport radar even much farther Why Measure Radio Frequency and Microwave Radiation Literally thousands of studies 6 000 and g...

Страница 27: ...What RADIO MICROWAVE Level is Considered Safe For our clients our goal is to keep long term exposures below 0 1 µW m which is how we express 0 1 microwatts m2 We teach our Certified EMF Consultants the RADIO MICROWAVE safety standard that have been recommended by the Building Biology Institute guidelines and we also reference the international scientists 2012 BioInitiative Report for a Biologicall...

Страница 28: ... present First we locate the highest signal strength using a pointing motion Then we use a second motion called rotating which is done by holding the meter pointed in the same direction and then rotating it turning your wrist 90 degrees This enables you to determine if the signals you are detecting are polarized or in other words if the signal from the source is either horizontal or vertical We us...

Страница 29: ...er solution of distancing from the source which means relocating the play yard to a more EMF free i e biologically safe spot on the property This is a good example of how this meter enables us to detect unseen sources pinpoint their location and identify them precisely so we may evaluate our most suitable protection options for that source in that situation Another example of a situation like this...

Страница 30: ...f from the source is always your first line of defense in lowering your exposure whenever and wherever possible The goal is to create as much distance as it takes to achieve the precautionary biological safety guideline of 0 1 µW m the exposure level of no concern However there is often not enough distance to provide the safety boundary that you need from a particular source and a microwave oven i...

Страница 31: ...afe 100 000 µW m power density at 10 20 feet distance is 1 000 000 times one million times stronger than is recommended by the Building Biology safety guidelines aiming for 0 1 µW m or biologically of no concern This difference between typical microwave oven exposure levels and precautionary biological safety exposure levels are simply too great So we find it is safest and simpler not to use the m...

Страница 32: ...en in front of the source of known radio microwave emissions then measuring the field on the protected side of the screen with your meter will tell you if this is an effective shielding for that situation Simply stated if it is effective protective the meter will display lower readings with the screen shielding than without it If you want to achieve lower readings you can double up the screen and ...

Страница 33: ... a walk outdoors in Nature We used this meter extensively when we were evaluating locations to launch an EMF Free Retreat Community Off grid does not mean Off EMF Although a celltower map refer to www emf experts com cell tower htm will give you some idea of the antennas and towers broadcasting in the areas where you are evaluating these types of public records are not kept very current Cell servi...

Страница 34: ...ce your exposure Sniffing Out Hidden Wireless Devices The directional capabilities of this meter offer a definite practical advantage when you are faced with a high EMF exposure situation with no logical or visual clues to assist you in locating the offending source Here we see the meter revealing the hidden WiFi device discreetly located in a built in compartment inside the cupboard of a stateroo...

Страница 35: ...o instrument when it comes to assessing bounce back signals reflected refracted etc and other types of signal behavior combining cancelling etc Whereas radio microwave exposure averaging meters promote their ability to more closely resemble human exposure through averaging all signals when you need to assess specific signals or their field strength this meter wins every before and after remediatio...

Страница 36: ...ronym for Digitally Enhanced Cordless Telecommunication that are sitting on bedside tables on the other side of a shared wall such as in a hotel room apartment housing or any other type of shared wall This illustration demonstrates the size of the one square meter area that this instrument is designed to measure The reading you see on the meter display represents the power density being sensed at ...

Страница 37: ...h they are of varying sizes Although this meter has sometimes been criticized as being too delicate breakable for the wear and tear of regular EMF metering in everyday situations the German made design has actually been ingeniously engineered to offer a meter at the lowest price possible and still be considered a fine professional instrument one that is better performing and less expensive than an...

Страница 38: ...y to deliver the best performance RADIO MICROWAVE Meter Audio Sounds of Various Sources There are several amateur sleuth videos but a video on YouTube that you will see frequently posted where this model of RADIO MICROWAVE meter is sold I refer to these videos in order to point out the various audio sounds one can hear with this meter and to discuss how sounds can be deceptive Keep in mind that th...

Страница 39: ...s takes you in the direction of the source where you can make an educated deduction of what the source is by remembering how EMF behaves and what devices emit what type of EMF then by factoring in what sources broadcast at what frequency all of this together will tell you what materials will shield and offer the best protection from exposure In some cases you never even need to identify the source...

Страница 40: ...ed accurately or not picked up at all This is true of all meters there is no such thing as one meter to do the job the Electromagnetic Spectrum of which radio microwaves are a part is far too vast to be measured that way So understandably your meter s unmeasurable range is likely to increase with changing technology and certainly as future demand for 5G grows since innovative technology is now bei...

Страница 41: ...detection meters were created for a general public that does not generally have the knowledge to understand what they are missing and wouldn t pay for it in any case By contrast more professional and particularly industrial meters have far more range or far more task appropriate range better quality engineering more rigorous made to specification design and more And all those high quality controll...

Страница 42: ...nsity is the measurement by which a wide variety of existing safety standards are defined With regards to today s conventional EMF safety standards this refers to the amount of power required to produce a tissue heating effect in the body An important distinction of radio microwave meters is that they most often do not measure field strength the level of EMF exposure which relates to how strong an...

Страница 43: ... EMF Experts com Page 43 of 46 PART V HF35C Meter User Support Material Conversion Table µW m to mV m Conversion Table on the back of the HF35C for converting Power Flux Density readings to Field Strength ...

Страница 44: ...www EMF Experts com Page 44 of 46 Power Flux Density W m2 to Field Strength V m Conversion Chart ...

Страница 45: ...ides the highest degree of precaution It reflects the unexposed natural conditions or the common and nearly inevitable background level of our modern living environment Slight Concern As a precaution and especially with regard to sensitive and ill people remediation should be carried out whenever it is possible Serious Severe Concern Values in this category are not acceptable from a building biolo...

Страница 46: ...refer to peak measurements They do not apply to radar signals More critical RF sources like pulsed or periodic signals mobile phone technology DECT WLAN digital broadcasting should be assessed more seriously especially in the higher ranges and less critical RF sources like non pulsed and non periodic signals FM short medium long wave analog broadcasting should be assessed more generously especiall...

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