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Gigahertz Solutions HF58B, Инструкция по эксплуатации

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20 

© Gigahertz Solutions GmbH

 

Made in Germany

Mains operation 

The HF analyser can also be supplied with power by using the 
mains adapter (for instance for long-term measurements in combi-
nation with the NFA). When doing so, please take care to turn the 
volume button right down to zero (“-”), otherwise you will be hearing 
the 50 Hertz noise of the mains voltage. 

Interferences may, however, also be caused by high frequency 
couplings through the power supply unit. This can easily be tested 
by unplugging the power supply unit from the meter while in use. If 
the measurement value now shows a 
significant drop, this is a sign of an un-
wanted coupling. 

For long-term measurements, the more 
reliable solution is to use a car battery 
with short cable to the power supply 
jack, or alternatively to apply ring ferrites 
onto the power supply cable (please see 
photo). 

 

 

 
 

 

Содержание HF58B

Страница 1: ...nstruction Manual Revision 7 0 This manual is subject to continuous updates amendments and adjustments The most current version can always be found for download on your local distributor s homepage or under www gi gahertz solutions de Due to the rapid increase of high frequency radiation sources regular measurements in your private surroundings are strongly recommended ...

Страница 2: ... Gigahertz Solutions GmbH Made in Germany ...

Страница 3: ...dulation 17 Use of Signal Outputs 19 Further Analysis 19 Battery Management 19 Warranty Service Address 21 Conversion Tables outside back cover Safety Instructions The HF analyser should never come into contact with water or be used outdoors in the rain Clean the meter only from the outside using a slightly moist cloth Do not use cleaners or sprays Due to the high sensitivity level the electronics...

Страница 4: ...igahertz Solutions GmbH Made in Germany Functions and Controls The HF component of the meter is shielded against interfer ence by an internal metal box at the antenna input shielding factor approx 35 40 dB ...

Страница 5: ...r on top mW m Milliwatts m bar on bottom µW m Microwatts m 8 DC output for additional instruments e g data logging devices for longterm recordings 1 V DC full scale For HF59B scalable to 2 V DC 9 Connecting socket for antenna cable The antenna is inserted into the cross slot at the top side of the instrument 10 Power Level Adapter Switch for external optional amplifier or attenuator only these are...

Страница 6: ...le Both ends of the antenna cable are equipped with small ferrite rolls to improve the antenna characteristics Do not remove them The connection of the omin antenna UBB27 available as op tional accessory for the HF59B but included in the HFE59B kit is described in the respective manual Checking Battery Status If the Low Batt indicator appears in the center of the display measurement values are no ...

Страница 7: ... waves propagate either vertically or hor izontally Cellular phone technology which is of greatest interest to us is usually vertically polarized or at an angle below 45 Due to reflection effects and the many ways in which a cellular handset can be held we also observe other polarization patterns Therefore it is always strongly recommended to measure both polarization planes which is defined by th...

Страница 8: ...e within a locally defined area even if this particular value should not exactly coin cide with a particular point of interest in for example the head area of the bed The above suggestion is based on the fact that slightest changes within the environment can already cause rather major changes in the power density of a locally defined area The person who per forms the HF testing for example affects...

Страница 9: ...ncies below 800 MHz when measuring with the LogPer antenna the HF58B and the HF58B r are equipped with an internal high pass filter at 800 MHz As the HF59B picks up frequencies below 800 MHz it has no inte grated high pass filter However the filter is available for external connection if needed and is to be placed between the antenna en try and the antenna cable In addition the HF59B is able to ca...

Страница 10: ...ut the measurement is faster and more encompassing On the other hand the LogPer antenna offers a higher precision and better localization for the same kind of work and the inter pretation of the results is easier But a comprehensive measure ment is more time consuming and restricted to a smaller fre quency band Step by Step Instruction to HF Measurement Procedure for the Quick Overview Measurement...

Страница 11: ...ons for the range max 1 Values 0 15 mW m Switch to med Values 0 15 mW m up to 1 5mW m Use preamplifier HV10 to convert the range of 20 000 max to a range of 2 000 Alternatively the larger value applies If you intend to do comparative measurements such as before vs after please always measure in the same range In the case of overload even with the range set to max display shows 1 on its left side t...

Страница 12: ...9 µW m med 0 01 19 99 µW m min 001 1 999 µW m simply read out no correction factor needed Setting Signal Peak RMS The following illustration shows the difference in the evaluation of a pulsed signal if displayed as an average value reading or a peak value reading RMS and Peak With the switch set to Peak the meter will display the full power flux density of the pulse 10 µW m in the graph With the s...

Страница 13: ...he interior local peak values are mostly subject to strong fluc tuations caused by multiple reflections In order not to overlook any local maxima so called hot spots indoor measurements should therefore preferably be done with the Peak hold setting Switching impulses can cause pseudo peaks which will appear on your display These can be deleted by pressing and holding the clear button for several s...

Страница 14: ...the UBB27 HF59B you only need to do this in locations where radiation from directly below or above cannot be ruled out multistorey buildings town houses etc Change the measurement position and avoid measuring ex clusively in one spot because that spot may have local or an tenna specific cancellation effects Some manufacturers of field meters propagate the idea that the ef fective power density sho...

Страница 15: ...S 3G LTE 4G WiMAX DVB Wireless LAN during full data transmission The modulation of these high speed services includes high nee dle like peaks compared to the average power transmitted Such signals are referred to as high crest factor signals Measure these signals for 1 or 2 minutes with peak hold by slightly panning the meter pointing to the direction of the main source For the assessment of the p...

Страница 16: ...igation a radar antenna slowly rotates around its own axis thereby emitting a tightly bundled radar ray Even with sufficient signal strength this ray can only be detected every cou ple of seconds for a few milliseconds This requires special meas urement technology HF58B r and HF59B Select setting VBW Maximum Set signal switch to Peak hold and direct the LogPer antenna towards the signal emitting s...

Страница 17: ...For the HF58B it is helpful to use the minus setting for Peak hold to catch the short bursts The HF58B r and HF59B have a patented circuitry that allows for the exact measurement of the extra fast rise times of the bursts even in the setting for Peak hold Identify where the radiation enters a structure As a first step eliminate sources from within the same room e g cordless phones wireless routers...

Страница 18: ...es the following steps Building biology guideline acc to SBM 2015 Baubiologie Maes IBN Anomaly none slight strong extreme µW m 0 1 0 1 10 10 1000 1000 Critical radio waves such as pulsed or periodic signals mobile phones DECT WLAN digital radio etc should be considered more damageable especially when frequently measured whereas less critical radio waves such as unpulsed or non periodic signals VHF...

Страница 19: ...z telephones as well as cel lular phones the signal patterns of which can be divided into a live connected phone call stand by mode and especially the es tablishing of a connection The typical signal patterns of a cellular phone base station can also be identified this way For comparison reasons you are well advised to take measurements during high traffic times as well as some times during the ni...

Страница 20: ...has 1 VDC output The auto power off function is automatically deactivated as soon as external devices are connected but only as long as there is no threat of total discharge Further Analysis Optional Accessories Available from Gigahertz Solutions The amplifier HV10 for a particularly high resolution allowing measurements of very weak HF signals The Attenuator DG20_G10 allowing the measurement of v...

Страница 21: ...ess on the grooved arrow and pull the cap off Insert only rechargeable batteries If you use regular alkaline non re chargeable batteries do not use a charger or AC adapter Auto Power Off This function conserves energy and extends the total operating time 1 In case you have forgotten to turn OFF the HF analyser or it has been turned ON accidentally during transport it will shut off automatically af...

Страница 22: ...ertz noise of the mains voltage Interferences may however also be caused by high frequency couplings through the power supply unit This can easily be tested by unplugging the power supply unit from the meter while in use If the measurement value now shows a significant drop this is a sign of an un wanted coupling For long term measurements the more reliable solution is to use a car battery with sh...

Страница 23: ...EDs will fade or even go out The warranty also covers damages to the antenna caused by such falls should these ever occur Analyser The analyser itself is definitely not impact proof Due to the com paratively heavy battery pack and the large number of delicate components damages caused by shock cannot be ruled out Any damage as a result of misuse or shock is therefore excluded from this warranty Ou...

Страница 24: ...6 6 0 47 6 600 476 0 07 5 14 7 0 51 4 700 514 0 08 5 49 8 0 54 9 800 549 0 09 5 82 9 0 58 2 900 582 0 10 6 14 10 0 61 4 1000 614 0 12 6 73 12 0 67 3 1200 673 0 14 7 26 14 0 72 6 1400 726 0 16 7 77 16 0 77 7 1600 777 0 18 8 24 18 0 82 4 1800 824 0 20 8 68 20 0 86 8 2000 868 0 25 9 71 25 0 97 1 2500 971 0 30 10 6 30 0 106 3000 1063 0 35 11 5 35 0 115 3500 1149 0 40 12 3 40 0 123 4000 1228 0 50 13 7 ...

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