antenna biconica emsap2000 - clampco sistemi: engineering ...=/at3000_manual.pdf · antenna side...

User manual

Clampco Sistemi is a registered trademark of Calzavara SpA – via Corecian, 60 – 33031 – Basiliano (Italy) http://www.clampco-sistemi.com/

AT3000

Triaxial Receiving Antenna 3 GHz

User manual

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User manual

Antenna model: AT3000

Rev 6.0 – September 2014


Index

AT3000 ................................................................................................................................ 1

TRIAXIAL RECEIVING ANTENNA 3 GHZ .......................................................................... 1

USER MANUAL .................................................................................................................. 1

1. USER INSTRUCTIONS ................................................................................................... 5

1.1. General features ........................................................................................................................... 5

1.2. Vertical antenna support (item SUPPORTOAT3000) ............................................................... 6

1.3. Axis selection ............................................................................................................................... 7

1.3.1. Axis selection with manual switch box (item ATSM01) ...................................................... 7

1.3.2. Axis selection with USB switch box (item ATSA03) ........................................................... 8

1.4. Composite cable .......................................................................................................................... 9

2. EXECUTION OF MEASUREMENT ............................................................................... 10

2.1. Radiation protection measurements ........................................................................................ 11

3. AT3000 ANTENNA CHARACTERISTICS .................................................................... 13

3.1. Radiation diagrams and Isotropy ............................................................................................. 13

3.2. Antenna factor ............................................................................................................................ 13

3.3. Antenna impedance ................................................................................................................... 15

3.4. Sensitivity ................................................................................................................................... 15

3.5. Maximum applicable field strength .......................................................................................... 16

3.6. AT3000 calibration ..................................................................................................................... 17

3.7. AT3000 functional check and metrological validation ........................................................... 18

3.8. Near field measurements .......................................................................................................... 18

3.9. AT 3000 Packaging .................................................................................................................... 19

4. MAINTENANCE ............................................................................................................ 20

4.1. AT3000 functional check ........................................................................................................... 20

4.2. Composite cable functional check ........................................................................................... 20

5. AT3000 ANTENNA SPECIFICATIONS ......................................................................... 22

6. ATSM01 MANUAL AXIS SELECTOR SPECIFICATIONS ........................................... 23

7. ATSA03 USB AXIS SELECTOR SPECIFICATIONS .................................................... 24

AT3000 ANTENNA KIT COMPOSITION AND CODES .................................................... 25

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Note

The AT3000 has been manufactured according to the 2006/95/CE directive (Low Voltage Directive).

According to IEC classification for electrical safety the AT3000 is a Class III product.

The AT3000 complies the Electromagnetic Compatibility Directive 2004/108/CE directive.

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1. User instructions

1.1. General features

The AT3000 device (Figure 1) contains three passive, independent, orthogonal antennas operating in the 30÷3000

MHz band, designed and built in Calzavara - Clampco Sistemi NIRLab laboratory. If used with the ferrite bead

coaxial cable supplied it allows reliable measurement of radio-frequency electric fields which have an

environmental impact in the vast majority of practical cases. The three orthogonal antennas are framed in the

black spherical polystyrene radome. The axis selection is accomplished by an internal RF electronic switch remotly

controlled by a cable connected to the antenna pigtail. The special ferritized cable (item ATCF02, 2 meter length )

in Figure 1 supplied with the antenna and it is composed by the RF cable and the axis selection cable.

Figure 1: AT3000 Antenna and ATCF02 composite cable

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1.2. Vertical antenna support (item SUPPORTOAT3000)

Firmly secure the base of the support to the ball joint on the tripod (Figure 2), use the ¼” brass threaded insert.

Connect the N male RF connector to the antenna port, then fix the axis selection connector of the composite cable

to the connector on the antenna pigtail. Be sure both connectors are well tightened to avoid poor contacts; after

measuring has been completed, check that the connectors are still tighten.

Insert the antenna handle into the support sleeve. Normally it is better to perform this operation while holding the

support base with one hand to prevent it from also rotating on the stand.

SUPPORTOAT3000

Threaded insert 1/4"

Composite cable ATCFxx

WARNING!

The 7-pin connector for the

selection of the axis has a key

insertion and a red dot alignment.

To avoid damaging do not force or

over-rotate the male and female

connectors.

Align

Red dots!

Antenna Side

(male)

Cable Side

(female)

Figure 2: Antenna fixing using the vertical support

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1.3. Axis selection

Axis selection is possible in two ways according to the option purchased:

1.3.1. Axis selection with manual switch box (item ATSM01)

The box (Figure 3) has to be placed near the spectrum analyzer and it permits to use the triaxial antenna with any

spectrum analyzer or RF receiver. Connect its pigtail to the connector of the composite cable (SA side), then simply

rotate the manual axis selector on the front to the desired polarization: a LED will be steady lit to indicate the axis

selected. To switch off the selector take the selector in ‘OFF’ position.

Figure 3: Manual axis selection box ATSM01

This device is power supplied by a standard battery type AA 1,5 V, 1500 mAh (60 hours operation).

Also rechargeable batteries NiCd or NiMH can be used, with battery duration according to the capacity. Battery

must be replaced when a LED blinks or does not produce any light although its axis has been manually selected.

If you don't use the manual axes selector, it is recommended to remove the battery.

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1.3.2. Axis selection with USB switch box (item ATSA03)

This selector, connected to a PC via a USB port, allows you to perform the selection, via software, of the measure

axis in order to execute fast, automatic and repetitive measures. The total current is less than 20 mA and hence

does not affect in any significant battery life of any laptop.

Figure 4: Automatic axis selection box ATSA03

Connect USB cable to USB PC port and then connect its pigtail to the connector of the composite cable (SA side).

The axis selected by the software is indicated by the corresponding LED panel.

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1.4. Composite cable

The axis control cable is a multipolar braided cable , ferritized at both ends. Note that the composite cable has an

antenna side (axis control cable end shorter than RF cable end) and a spectrum analyzer side (axis control cable

end with same length as RF cable end) see figure below:

To axis control interface

(ATSM01 or ATSA03)

N-male

SPECTRUM ANALYZER

SIDE

ANTENNA

SIDE

N-male

To Antenna Pigtail

Figure 5: ATCFxx composite cable

The standard length of the supplied composite cable is 2 meters (item ATCF02) but on request it is available with

different lengths. See below typical attenuation and return loss of the supplied cable (RG214, N male connectors,

ferritized at both ends).

Figure 6: ATCF02 RF cable typical Attenuation (left) and Return Loss (right)

0.0

0.5

1.0

1.5

2.0

0.1 1 10 100 1000 10000MHz

dB

-50

-40

-30

-20

-10

0

0.1 1 10 100 1000 10000M H z

dB

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2. Execution of measurement

The basic general procedure to measure electric field of CW signal at a given frequency with a generic spectrum

analyzer in a selected point of space can be described as follows.

1) fix the antenna with the radome in the point selected and set the spectrum analyzer the spectral band of

interest;

2) set the spectrum analyzer parameters (Start and Stop Frequency, RBW, detector type, etc.);

3) measure in sequence the amplitude of the three components Ex, Ey, Ez using the manual or automatic axis

selection and compute the total electric field , i.e. .

The point 3) of the above procedure involves these further computations to be done for each component of

electric field (see also par. 3.4 of this manual):

take the reading RdBm in dBm unit on the spectrum analyzer ;

convert the reading in dB V : (50 ohm instrument impedence);

add cable attenuation and antenna factor K at the given frequency to get the value of the component of

electric field under measurement : ;

convert the result in V/m :

Some part of commercial spectrum analyzers provide the possibility to store the antenna factor and the

attenuation of the cable in use, so to display automatically the electric field in real time.

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2.1. Radiation protection measurements

The measurement of electric fields which have environmental impact is a complex activity that falls within the

scope of international standards; it is recommended that the following be consulted:

IEC 61566, 1977 “Measurement of exposure to radio-frequency electromagnetic fields strength in the

frequency range 100kHz-1GHz”

ICNIRP “Guidelines for limiting exposure to time varying electric, magnetic and electromagnetic fields up to

300 GHz”

The general procedure to measure electric field with a generic spectrum analyzer for radiation protection of

humans in a selected point of space1 can be described as follows:

1) fix the antenna with the radome in the point selected and identify on the spectrum analyzer the i=1,..N

spectral bands of interest (broadcast channels or other sources);

2) for each channel i choose a time averaging method on the spectrum analyzer (max hold, rms power

average, channel power) defining the particular measurement algorithm recommended by the applicable

regulation;

3) measure the averaged amplitude of the 3 components Eix, Eiy, Eiz for each selected channel, then compute

the total electric field of the channel , i.e. , where i = 1, 2 ..N. The averaging time

and any correction factor to add to the result has to be selected according to the applicable regulation.

Consider that this calculation must be done after the conversion of the spectrum analyzer reading unit

(dBm) into the unit of electric field (V/m), as explained above.

4) compute the total rms field in the point selected: , where wi are weights defined by

the regulation applied;

5) compare the result with the admitted electric field limit LP defined by the regulation applicable in the point

selected.

1 In general, the criteria for selection of the measurement points and the space averaging method have to be defined

as well.

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Note: In the national Italian scale, it is recommended that the following be consulted:

CEI 211-7 “Guide for the measurement and evaluation of electromagnetic fields in the frequency range

10kHz÷300 GHz, with reference to human exposure”. It is therefore advisable to refer to this technical

standard when defining the numerous operating details (spatial and time averages, receiving instrument

settings, correction factors, periods of observation, …) which constitute a common protocol for

measurement. Other Italian reference documents are:

ANPA : “Technical guide for the measurement of electromagnetic fields in the frequency range

100kHz÷3GHz with reference to exposure of the public”.

From an Italian legislative point of view, the following should be consulted: DPCM (Ministerial Decree) July 2003

which has replaced with minor changes the DM (Ministerial Decree) 381 of September 1998.

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3. AT3000 antenna characteristics

3.1. Radiation diagrams and Isotropy

AT3000 contains three short dipole antennas with linear polarization. The structure of these antennas makes

possible to obtain a transduction coefficient that is sufficiently high at low frequencies while maintaining an omni-

directional type radiation diagram even at the highest frequencies in the operating band. To achieve these

behavior the interaction between the 3 antennas and the effect of the antenna rod and of the cables have been

minimized.

It is well known that the invariability of the total field in relation to the device orientation

selected for making the measurement (isotropy) is totally reliant on the availability of an omnidirectional diagram

for each of the three internal antennas.

From experimental diagrams obtained, it has been found that this characteristic is achieved with negligible

deviations from the lowest frequencies and up to about 1.7 GHz. Deviations from the omnidirectional diagram are

slight between 1.7 and 2.2 GHz and are still very small between 2.2 and 2.5 GHz.

It should be noted that the stochastic measurement error due to deviation from the omnidirectional

characteristics (anisotropy) is calculated on the quadratic sum of the three components. This means that over and

under-estimates of the individual component are normally compensated by reducing the error on the total field.

It should in fact be borne in mind that factor K is normally defined in a calibration with a wave striking the antenna

in a single given direction.

3.2. Antenna factor

To keep things simple, let us assume that the antenna is struck by a monochromatic, plane and uniform wave

whose polarization coincides with the axis of the dipole. The system consisting of the antenna and ferrite bead

coaxial cable returns a signal whose amplitude is proportional to the amplitude of the electric field being

measured. The proportionality factor depends on the geometric-electrical characteristics of the dipole, of the

internal balun and of the cable. The frequency of the incident wave remains the only parameter free of this

transfer, being negligible the variations of the transfer characteristics due to temperature variations, drift of the

construction component characteristics and variations in the condition of the connectors and cables. We can

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therefore characterize each antenna-ferrite bead cable system by means of a table that shows the numerical value

of such transfer for a significant set of frequencies.

Figure 7: AT3000 Antenna factor (typical) at antenna port

It should be noted that the calibration of the antenna factor, particularly for what is concerned to the lowest

frequencies (up to 200 MHz), does not include cable and/or antenna handle contributions, in order not to

constrain the antenna factor to a particular E-field configuration, i.e., field polarization, coupling among antennas

or with cables. For this reason, the antenna and the cable should be oriented orthogonally to the polarization of

the field under measurement, and displaced in order to avoid coupling effects.

Note on Antenna Factor: for the convenience of those who use the system connected to a spectrum analyzer, the

transfer characteristic of the system described above is usually represented in terms of antenna factor, i.e., of the

value to be added to the indication in dBμV of the signal received by the spectrum analyzer (50 port), in order to

obtain the intensity value of the incident electric field on the antenna in dBμV/m. For example, if a certain signal at

the frequency of 1 GHz appears on the spectrum analyzer with an amplitude of 76 dBμV (about –31 dBm), and the

calibration table supplied with the system shows an antenna factor = 44 dB at 1 GHz, then the amplitude of the

incident field is equivalent to 76+44=120 dBμV/m, that is 1 V/m.

In fact, it should be noted that the above calculation is only strictly valid if the signal is measured directly at the

antenna output. To obtain the overall antenna factor of the system, including the RF cable, it is necessary to add

the value in dB of the attenuation on this cable (assessed at the respective frequencies and obtained from the

relative certificate) to the antenna factor values shown in the table supplied with the system.

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3.3. Antenna impedance

The diagram below represents the typical return loss coefficient of the receiving antenna AT3000 measured at the

antenna port with all available axis selection.

Figure 8: AT3000 return loss at the antenna port (typical)

As one can see it is low enough to get negligible error due to stationary waves in the RF cable, provided that the

receiving instrument has an acceptable impedance match. Generally this is not necessary but, in order to verify the

possible presence of stationary waves in the coaxial cable used, it is possible to set a minimum value for the

internal attenuator of the spectrum analyzer , typically 5 or 10 dB, and compare the result.

3.4. Sensitivity

Selective field measurements normally rely on a “display” instrument with a wide range of setting possibilities: the

spectrum analyzer (SA). It is therefore better to take into consideration the entire measuring system, including the

SA.

Usually, the minimum detectable signal is limited by the noise. Thermal noise has a uniform spectrum distribution

with a value of about –174 dBm/Hz at ambient temperature. Furthermore, the contribution of the SA which

depends on the processing chain of the signal from the sensor input (attenuators, IF amplifiers, sampling

method…) must be also considered. This varies as the state of the analyzer varies (input attenuation, reference

level, sampling method, display filtering, display averages…). Finally, the parameter RBW (resolution bandwidth)

defines the integration interval of the spectral power density. It is usually expressed in terms of dBHz, i.e.,

10log10(RBW), where RBW is the resolution bandwidth in Hz.

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It would be possible to establish a SA noise figure and then add the RBW contribution. However, it is better to

consider a given state of the instrument for simplicity. For example, a portable SA with 0 dB input attenuation,

sampling set to “sample”, reference level at –70 dBm, RBW = 1 kHz and VBW = 30 Hz should have a background

noise level NdBm of less than –120 dBm at a frequency of 1 GHz.

Neglecting the contribution from the antenna noise, we can calculate the corresponding equivalent electric field at

the point of measurement due to the SA noise NdB V/m as follows: convert the background noise reading to dBμV,

e.g., if NdBm = -120 dBm, NdB V = NdBm+ 107dB = -13 dBµV, and add both the antenna factor KdB (1/m) and the cable

attenuation AttdB. For example, if KdB (1/m) + AttdB = 46 dB at 1 GHz, then NdB V/m = 33 dBμV/m that corresponds to

about 45 μV/m.

In order to identify a signal, we must obviously distinguish it from the noise. If we want a signal to noise ratio S/NdB

of at least 10 dB, the sensitivity level of the measurement system SdB V/m will be SdB V/m = NdB V/m + S/NdB = 43

dBμV/m, corresponding to about 150 μV/m = 0.15 mV/m. The SA set-up could of course be different. However, as

it can be deduced above, the sensitivity level of the entire measurement system depends on the background noise

level displayed by the SA.

Finally, it should be noted that the antenna factor K and the background noise of the SA vary with the frequency:

in practice, if the other parameters being equal, the lower the antenna factor K, the greater the sensitivity.

Therefore, the user must evaluate, from time to time, the background noise level that is present in his measuring

chain under the conditions in which he intends to perform measurements. With the procedure illustrated, he will

be able to determine the minimum sensitivity threshold. It is worth noting that very small sensitivity values can be

achieved by setting a low RBW value.

3.5. Maximum applicable field strength

AT3000 is a passive device except for its internal three-ways RF switch. The 1 dB compression point of this switch is

about 20 dBm.

This means that, no matter what is RF cable attenuation, the corresponding 1dB compression point, in terms of a

generic electric field component Ea (where a can be x, y, or z) is Ea[1dB] = 20 dBm + 107 dB + KdB (1/m), where the

result is expressed in dB V/m.

Using the minimum antenna factor (about 42 dB/m), the minimum compression point is about 300 V/m in the

working frequency band. This value corresponds to the maximum applicable field strength that guarantees a

correct measurement.

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3.6. AT3000 calibration

This passive device does not contain any parts whose characteristics deteriorate over time, however the

recommended calibration interval depends on intensity of use or on undesired accidental events (falling, crushing,

contact with liquids). Generally the calibration procedure is carried out against the sample in an environment free

of interfering field. Calzavara - Clampco Sistemi supplies the antenna complete with a calibration certificate issued

by its radio-electric laboratory. This is obtained in controlled environments (TEM cell and anechoic chamber) by

comparison with the laboratory primary samples, calibrated in SIT accredited or equivalent (EA) laboratories.

The correct position is represented in the figure below. Rotate the antenna on its axis until the dipole axis is in a

horizontal plane. In Figure 9, the X antenna is ready to be calibrated supposing that a horizontal polarization

launch is used. Now the other two antenna factors (KY, KZ) can be measured in sequence by manually rotating the

support through 120° in relation to the base of the support.

Figure 9: Calibration position and procedure for AT3000 antenna

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Connect the axis selection connector of the composite cable to the connector on the antenna pigtail, then fix the N

male RF connector to the antenna port. Always make sure that both connectors are well tightened to avoid poor

contacts: after measuring has been completed, always check that the connectors are still tight.

3.7. AT3000 functional check and metrological validation

In general, since it is necessary to perform measurements of declared uncertainty which satisfy required

repeatability and reliability criteria, it is always desirable to set up user metrological validation procedures aimed

at identifying and promptly resolving any problems with the devices used.

Periodic calibration in itself provides an opportunity for metrological validation but the intervals for this (usually

annual) are not frequent enough to guarantee the accuracy of all measurements performed in the intervening

period.

The chosen procedure, however simple or complex, must be aimed at least at identifying any potential serious

faults in the equipment in order to prevent it being used and, if possible, should highlight any deviations from

significant parameters which increase the total uncertainty of measurement.

The above procedure, which must be repeated at intervals established by the user based on the relative

requirements and the level of use of the device, naturally requires the availability of an RF generator, a receiver

and one or more other antennas operating in compatible bands and, finally, the possibility of creating a measuring

environment with radio-electric and environmental characteristics that are repeatable over time. In general,

intervals of no less than one third of the calibration interval is recommended.

The occurrence of a traumatic event for the device (impact, crushing, exposure to high temperatures, to rain or to

corrosive agents) or the need to perform measurements of extreme importance or involving high costs if the

measurement has to be repeated will, of course, require extraordinary metrological validation.

3.8. Near field measurements

When an antenna of this type is calibrated, it is normally used a field of known amplitude of radiative type (far

field plane wave or TEM mode), where the ratio between the electric field E and the magnetic field H has a known

and defined value (377Ω, i.e., wave impedance of the free space). This condition does not normally occur in the

near field region of a transmitting station.

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In general, a passive receiving antenna picks up energy from the electromagnetic field being measured and makes

it available at the RF cable connector (5Ω). This means that the signal actually measured at the spectrum analyzer

depends not only on the amplitude of the electric field being measured, but also on the associated magnetic field

and its relative phase. Consequently, at a given frequency, the response of a passive antenna in two conditions of

equal electric field but with a different associated magnetic field (i.e. with different wave impedance) is not

necessarily identical. With regard to the usable band of the antenna in question, the problem arises in practice in

the vicinity of dipole array of FM radio systems (where the near field zone is more extensive). In this case, the error

will nevertheless be negligible because at these frequencies, internal antennas of AT3000 have high impedance.

More generally, however, it is advisable to compare near field measurements performed using passive antennas

with other measurements obtained with instruments (active antennas or wide band sensors) featuring a higher

receiving antenna impedance. In particular, in the near field zone of a RF source, it is advisable to measure the E

and H components of the field separately using respective instruments of known and adequate rejection of the

dual component.

3.9. AT 3000 Packaging

For transportations of the device (for example for return for calibration or service) always use its original case (or

wooden box wrapping AT3000 with a bag and fill the box with soft material). This will prevent from damage the

polystyrene radome and the antennas.

To avoid damaging the antenna.

Do not apply any force between the sphere and the handle.

Avoid taking the antenna from the sphere.

Do not crush the sphere.

Do not press the sphere against the border of the carry case.

Figure 10: Typical composition of the bag for AT3000

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4. Maintenance

4.1. AT3000 functional check

AT3000 does not usually require any maintenance, except for general cleaning with a damp cloth. Do not use

solvents on plastic components.

To verify that the device is in good conditions it is possible to check the return loss of the three antennas X,Y, Z at

the output port with a suitable network analyzer or equivalent device, comparing the results with that registered

in the original certificate of manufacturer. For this operation place the antenna on its vertical support, in free

ambient at least 1.5 m apart from conductive or dielectric obstacles.

Any important difference would indicate a damage in one of the antennas, in the switch or in the axis selector. In

general this simple and fast functional check procedure significantly reduces the possibility of measuring

unreliability and it is recommended before of the periodic calibration or when a damage is suspected.

Please ask the manufacturer for assistance in the following cases:

unsatisfactory result of functional check or of metrological validation;

variations of calibration results on the last certificate not compatible with the previous certificate, which are not justified by replacement of parts or up-dating of version;

unsteady antenna connector;

damaged connector on axis selection pigtail;

presence of dents indicating a heavy impact.

damaged radome.

4.2. Composite cable functional check

Visual check: check both cables, especially in the area close to the antenna connector. In general, exposed parts of

the outer conductor braid are indicative of a damaged cable. Verify that there is no dirt inside the connectors.

Axis selection cable: verify that internal pins of the connectors are not damaged. For a complete check verify with

a tester the six internal electrical connections (excluding central pin 7, which is not used). The outer braid of this

cable must be electrically in contact with connector body at both ends; of course it must be electrically isolated

from the six internal conductors.

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RF cable: periodically check that the end of the inner conductor is not too far back from (max 3 mm) or projecting

beyond the plane (max 1mm) of the opening of the threaded ring on the male connector: this can respectively

cause poor contacts or damage the female connector of the antenna or analyzer.

Check that there are no obvious signs of local deterioration of the cable. Even slight recurrent distortion of the

cable (for example opposite the ferrite beads) can cause resonance and defective behavior of the device at some

frequencies.

The cable must be periodically calibrated to evaluate its attenuation (which is part of the measuring chain). It is

also important to check the intrinsic return loss at the connectors, with a suitable load and a network analyzer or

equivalent device: a high return loss coefficient can in fact affect the overall measuring uncertainty.

A functional check procedure for the individual cable significantly reduces the possibility of measuring unreliability:

the simplest method is to have two similar cables and compare the results obtained when they are used

successively. If in doubt, please do not hesitate to contact the manufacturer: the cost of cable maintenance is

usually negligible.

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5. AT3000 Antenna Specifications

General characteristics

Dimensions - antenna radome diameter: 200 mm - antenna total length: 540 mm;

- AT_CARRYCASE portable: 600 x 260 x 240 mm

Weight - antenna (excluding composite cable): 1,20 kg

- ATCF02, 2 meters composite cable: 0,40 kg

- AT_CARRYCASE portable: 5,50 Kg

Connectors N-female

Material

radome polystyrene painted black

enclosure PVC

Measurement characteristics

Antenna type isotropic transducer with 3 orthogonal dipole antennas, with RF absorbing antenna boom

Polarization linear, tri-axial polarization selection by means of internal electronic solid state RF switch

Axis selection By PC via USB axis selection interface or manual remote axis selection box, battery power supplied (alternative option ATSM01)

Frequency range from 30 MHz to 3000 MHz

Maximum applicable field > 400 V/m

Antenna factor and SWR characterized individually, certificate included

Isotropy Error Electric field vector reconstruction RMS Error for =0° 360° field incidence direction

Vertical polarization incident fields:

from 30 MHz to 50 MHz < 2,5 dB from 50 MHz to 110 MHz < 1,5 dB from 110 MHz to 3000 MHz < 0,8 dB

Horizontal polarization incident fields:

from 30 MHz to 65 MHz < 2,0 dB from 110 MHz to 3000 MHz < 0,8 dB

Axis selection connector 7 pin screened connector, ferritized copper braided pigtail.

Ambient Conditions

Protection grade IP42

Temperature From –20°C to +60°C.

Humidity Max 95% at 50°C (without condensation).

Shock Resistance 1 meter drop without degradation of the radiation electrical characteristics.

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Rev 5.0 – February 2014


6. ATSM01 Manual Axis selector Specifications


Dimensions 80 x 70 x 75 mm

Weight 0,43 Kg

Connectors 7 pin screened connector, on 25 cm of ferritized copper braided pigtail.

Material aluminum painted black

Axis Selection Four position rotating selector OFF-X-Y-Z

Axis Indicator One Red LED ultrabright for each axis

Power Source

Type

One interchangeable Alkaline or NiCd AA battery

Autonomy with standard AA battery type > 60 hours

Ambient Conditions




Shock Resistance 1 meter drop without damages

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7. ATSA03 USB Axis selector Specifications


Dimensions 56 x 37 x 62 mm

Weight 0,23 Kg

Connectors 7 pin screened connector, on 20 cm of ferritized

copper braided pigtail.

USB type A male connector on 70 cm USB cable

Material aluminum painted blue

Axis Selection Via USB protocol

Axis Indicator One Red LED ultrabright for each axis

Power Source

Current < 10mA from USB port

Ambient Conditions




Shock Resistance 1 meter drop without damages

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AT3000 Antenna Kit Composition and codes

AT3000 kit

AT3000 Triaxial antenna with calibration certificate of antenna factor and return

loss of the three antennas

SUPPORTOAT3000 Support 1/4" for triaxial antenna

Accessories and Options

ATSM01 Manual remote axis selector, battery powered (80x75x55mm, weight =400 g)

ATSA03 USB remote axis selector (64x84x34mm, weight =250 g)

AT_CARRYCASE Carry Case for triaxial antenna

AT_WOODENTRIPODE Wooden tripod with rotating joint and bag

ATCF02 2 m composite cable Nm-Nm, ferritized (with calibration certificate of

attenuation and return loss)





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