Clampco Sistemi AT3000 User Manual
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.
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