Clampco Sistemi AT3000 Manuel utilisateur

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

Page 3 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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

Page 4 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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.

Page 5 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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

Page 6 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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

Page 7 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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.

Page 8 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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.

Page 9 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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 10000

MHz

-50

-40

-30

-20

-10

0.1 1 10 100 1000 10000

M Hz

Page 10 of 25

User manual

Antenna model: AT3000

Rev 6.0 –September 2014

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

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, Ezusing 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.

Table des matières

Manuels Antenne populaires d'autres marques

Alfa Network

Alfa Network APA-L01 Manuel utilisateur

Naval

Naval PR-422CA Manuel utilisateur

Feig Electronic

Feig Electronic ID ISC.ANTH200/200 Series Manuel utilisateur

TERK Technologies

TERK Technologies TV44 Manuel utilisateur

Directive Systems & Engineering

Directive Systems & Engineering DSE2324LYRMK Manuel utilisateur

HP J8999A Manuel utilisateur

MobilSat

MobilSat MSP-S Manuel utilisateur

Steren

Steren ANT-UHF 13 Manuel utilisateur

Novatel

Novatel 600-G Manuel d'utilisation

Radio Shack

Radio Shack Amplified VHF/UHF/FM Indoor Antenna Manuel utilisateur

TRENDnet

TRENDnet TEW-AO12O Manuel utilisateur

Radio Shack

Radio Shack 15-1837 Manuel utilisateur

CommScope

CommScope CMAX-OMFX-43M-I53 Manuel utilisateur

Ramsey Electronics

Ramsey Electronics DAP25 Manuel utilisateur

COBHAM

COBHAM SAILOR 800 VSAT Manuel d'utilisation et d'entretien

Trango Systems

Trango Systems AD900-9 Manuel utilisateur

Steren

Steren ANT-100 Manuel utilisateur

Proxim

Proxim 5054-PA-23 Manuel utilisateur